Oculodentodigital Dysplasia

Mendelian MONDO:0008111 Pathograph 21 Ectodermal dysplasia syndrome Skeletal dysplasia Connexinopathy

Oculodentodigital dysplasia (ODDD) is a rare pleiotropic disorder caused by mutations in GJA1, which encodes connexin 43 (Cx43), the most widely expressed gap junction protein. Most cases are autosomal dominant with high penetrance and variable expressivity; rare autosomal recessive forms with more severe phenotypes have been reported. The hallmark features are craniofacial dysmorphism (narrow nose with hypoplastic alae nasi), ocular anomalies (microphthalmia, microcornea), dental abnormalities (microdontia, enamel hypoplasia, taurodontia), and digital malformations (type III syndactyly of the fourth and fifth fingers, camptodactyly). Neurological involvement including spastic paraplegia, dysarthria, ataxia, neurogenic bladder, and seizures occurs in a significant minority. Conductive hearing impairment, skin/hair/nail anomalies, and rare cardiac defects are additional reported features. Dominant-negative GJA1 mutations impair gap junction intercellular communication, disrupting coordinated signaling in tissues that depend on Cx43-mediated coupling. Allelic conditions include erythrokeratodermia variabilis et progressiva (MONDO:0033013) and palmoplantar keratoderma with congenital alopecia (MONDO:0007083), reflecting the broad phenotypic spectrum of GJA1 dysfunction.

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2
Inheritance
5
Pathophys.
22
Phenotypes
21
Pathograph
1
Genes
5
Treatments
2
Subtypes
1
Deep Research
👪

Inheritance

2
Autosomal dominant HP:0000006
ODDD is predominantly autosomal dominant with high penetrance and intra- and interfamilial phenotypic variability. Over 62 different GJA1 mutations have been identified across more than 50 families. The dominant-negative mechanism means that the mutant Cx43 protein interferes with wild-type Cx43 in gap junction assembly.
Autosomal dominant inheritance Penetrance: INCOMPLETE
Show evidence (2 references)
PMID:19338053 SUPPORT Human Clinical
"The predominantly autosomal dominant disorder, oculodentodigital dysplasia (ODDD) has high penetrance with intra- and interfamilial phenotypic variability."
Directly states AD inheritance with high penetrance and variable expressivity in ODDD.
PMID:12457340 SUPPORT Human Clinical
"We found mutations in the GJA1 gene in all 17 families with oculodentodigital dysplasia that we screened. Sixteen different missense mutations and one codon duplication were detected."
Demonstrates the genetic basis of ODDD across multiple families with diverse GJA1 mutations.
Autosomal recessive HP:0000007
Rare autosomal recessive ODDD has been documented in a small number of families, caused by homozygous loss-of-function mutations (e.g. R76H, R33X, R148X). Recessive cases may exhibit a more severe phenotype. The mechanisms differ from dominant cases: loss-of-function rather than dominant-negative effects.
Autosomal recessive inheritance
Show evidence (2 references)
PMID:23606748 SUPPORT In Vitro
"Surprisingly, there have been two autosomal recessive mutations reported that cause ODDD: a single amino acid substitution (R76H) and a premature truncation mutation (R33X)."
Documents two distinct AR mutations causing ODDD by different molecular mechanisms.
PMID:29902798 SUPPORT Human Clinical
"a novel homozygous mutation (c.442C>T, p.Arg148Ter) was determined in the GJA1 gene leading to a premature stop codon. His phenotypically normal parents were found to be carriers of the same mutation. This is the third family in the literature in which ODDD segregates in an autosomal recessive manner."
Reports a third AR family with a homozygous truncating mutation, confirming recessive inheritance in ODDD.
◆

Subtypes

2
Autosomal Dominant ODDD
Classical form, caused by heterozygous dominant-negative GJA1 mutations. Accounts for the vast majority of reported cases. Variable expressivity but high penetrance.
Autosomal Recessive ODDD
Rare form caused by homozygous or compound heterozygous loss-of-function GJA1 mutations. Tends to present with more severe features. Only a handful of families reported worldwide.
⚙

Pathophysiology

5
Dominant-negative GJA1 mutations disrupt gap junction communication
GJA1 encodes connexin 43 (Cx43), the most widely expressed gap junction protein. In the autosomal dominant form, missense mutations produce mutant Cx43 that co-assembles with wild-type Cx43 (and other connexins) into dysfunctional gap junction channels, exerting a dominant-negative effect. This impairs intercellular communication in tissues that critically depend on Cx43: craniofacial structures, limb buds, eyes, teeth, brain, and skin. Mutations occur across all nine domains of the Cx43 protein and may cause misassembly of channels or alter channel conduction properties. The tissue- specific phenotypic expression reflects the differential dependence of each tissue on Cx43-mediated gap junction intercellular communication (GJIC) during development and postnatal life.
Osteoblast link Keratinocyte link Odontoblast link
Gap junction assembly link ↓ DECREASED Cell communication via gap junctions link ↓ DECREASED
Downstream
Craniofacial, dental, and limb developmental anomalies
Ocular developmental and glaucoma risk
Neurological dysfunction from impaired CNS gap junctions
Show evidence (3 references)
PMID:12457340 SUPPORT Human Clinical
"Gap junctions are assemblies of intercellular channels that regulate a variety of physiologic and developmental processes through the exchange of small ions and signaling molecules."
Establishes that gap junctions composed of connexin proteins mediate intercellular signaling critical for development.
PMID:12457340 SUPPORT Human Clinical
"These mutations may cause misassembly of channels or alter channel conduction properties."
Demonstrates that GJA1 mutations disrupt gap junction function through either channel misassembly or altered conduction.
PMID:19338053 SUPPORT Human Clinical
"Mutations resulting in ODDD occur in each of the nine domains of the Cx43 protein, and we review our functional experiments and those in the literature, examining the effects of 13 different Cx43 mutations upon gap junction activity."
Confirms mutations across all Cx43 protein domains affect gap junction activity.
Craniofacial, dental, and limb developmental anomalies
Impaired Cx43-mediated GJIC during embryonic development disrupts coordinated signaling in neural crest-derived craniofacial structures and developing limb buds. This leads to the characteristic narrow nose, digital syndactyly, and dental anomalies. Cx43 is essential for osteoblast and odontoblast differentiation and function.
Osteoblast link Odontoblast link
Gap junction assembly link ↓ DECREASED
Show evidence (1 reference)
PMID:12457340 SUPPORT Model Organism
"Expression patterns and phenotypic features of gja1 animal mutants, reported elsewhere, are compatible with the pleiotropic clinical presentation of oculodentodigital dysplasia."
Animal models of gja1 mutations recapitulate the pleiotropic craniofacial and limb phenotypes seen in ODDD.
Ocular developmental and glaucoma risk
GJA1/Cx43 disruption contributes to ocular developmental anomalies such as microphthalmia and microcornea, while ciliary body cysts and progressive angle closure can drive glaucoma in some patients. This makes ocular disease both a developmental feature and a surveillance priority.
Cell communication via gap junctions link ↓ DECREASED
Downstream
Microphthalmia
Microcornea
Glaucoma
Show evidence (2 references)
PMID:32318302 SUPPORT Human Clinical
"Mutations most commonly affect the extracellular-1 and cytoplasmic-1 domains of connexin-43 (gene product of GJA1), predominately manifesting in microphthalmia and microcornea."
The ocular review links GJA1/Cx43 variant domains to microphthalmia and microcornea as predominant ocular manifestations.
PMID:26743931 SUPPORT Human Clinical
"This is one of the first reported cases of severe chronic angle- closure glaucoma secondary to ciliary body cysts in a patient with oculodentodigital dysplasia."
Supports ciliary body cysts and chronic angle closure as one mechanism of glaucoma in ODDD.
Neurological dysfunction from impaired CNS gap junctions
Cx43 is the predominant gap junction protein in astrocytes and plays a critical role in CNS homeostasis. Disrupted astrocytic gap junction networks impair potassium buffering, metabolite exchange, and coordinated neural activity, contributing to spastic paraplegia, seizures, ataxia, and white matter abnormalities observed in ODDD.
Cell communication via gap junctions link ↓ DECREASED
Show evidence (1 reference)
PMID:19338053 SUPPORT Human Clinical
"Neurological problems, including dysarthria, neurogenic bladder disturbances, spastic paraparesis, ataxia, anterior tibial muscle weakness, and seizures, are known to occur"
Enumerates the neurological manifestations resulting from impaired CNS gap junction function.
Loss-of-function mechanism in autosomal recessive ODDD
In autosomal recessive ODDD, homozygous mutations cause complete loss of Cx43 function rather than dominant-negative effects. The R33X truncation mutant fails to form functional channels and additionally exerts trans- dominant effects on co-expressed connexins (Cx43 and Cx40), potentially explaining the greater disease burden in some AR cases. The R76H mutant retains partial function with reduced conductance.
Gap junction assembly link ↓ DECREASED
Show evidence (2 references)
PMID:23606748 SUPPORT In Vitro
"the trans-dominant effect of R33X together with its complete inability to form a functional channel may explain why patients harboring this autosomal recessive R33X mutant exhibit greater disease burden than patients harboring the R76H mutant."
Functional studies reveal distinct mechanisms for the two known AR mutations, explaining phenotypic severity differences.
PMID:23606748 SUPPORT In Vitro
"the R76H mutant trafficked to the plasma membrane to form gap junction-like plaques, whereas the R33X mutant remained diffusely localized throughout the cell, including the nucleus."
The R76H mutant retains some trafficking and channel formation capacity while R33X is completely non-functional.
⬡

Pathograph

Use the checkboxes to hide or show graph categories. Hover nodes for evidence and cross-linked metadata.
Pathograph: causal mechanism network for Oculodentodigital Dysplasia Interactive directed graph showing how pathophysiology mechanisms, phenotypes, genetic factors and variants, experimental models, environmental triggers, and treatments relate through causal and linked edges.
●

Phenotypes

22
Ear 1
Conductive hearing impairment Conductive hearing impairment (HP:0000405)
Show evidence (1 reference)
PMID:12457340 SUPPORT Human Clinical
"Syndactyly type III and conductive deafness can occur in some cases, and cardiac abnormalities are observed in rare instances."
Supports conductive hearing impairment as an additional but non-universal manifestation of ODDD.
Eye 3
Microphthalmia FREQUENT Microphthalmia (HP:0000568)
Show evidence (1 reference)
PMID:32318302 SUPPORT Human Clinical
"The most common eye features reported among all mutations were microcornea, microphthalmia, short palpebral fissures, and glaucoma."
Supports microphthalmia as one of the core ocular manifestations reported across published ODDD cases.
Microcornea FREQUENT Microcornea (HP:0000482)
Show evidence (1 reference)
PMID:32318302 SUPPORT Human Clinical
"The most common eye features reported among all mutations were microcornea, microphthalmia, short palpebral fissures, and glaucoma."
Supports microcornea as a recurrent ocular phenotype in ODDD.
Glaucoma OCCASIONAL Glaucoma (HP:0000501)
Show evidence (2 references)
PMID:32318302 SUPPORT Human Clinical
"The most common eye features reported among all mutations were microcornea, microphthalmia, short palpebral fissures, and glaucoma."
Supports glaucoma as one of the major ocular manifestations reported across published ODDD cases.
PMID:34035645 SUPPORT Human Clinical
"Of the 116 patients, glaucoma was observed in 26.7% (31/116), among whom 77.4% (24/31) of cases occurred in patients ≥10 years old."
In the literature review subset with ocular signs, glaucoma affected 31/116 patients and usually presented after age 10, underscoring its clinical importance.
Genitourinary 1
Neurogenic bladder Neurogenic bladder (HP:0000011)
Show evidence (1 reference)
PMID:29927410 SUPPORT Human Clinical
"In about 30% of patients neurological disorders appear later in life: progressive spastic paraparesis, neurogenic bladder/bowel, ataxia, white matter lesions on MRI."
Supports neurogenic bladder as part of the later-onset neurologic spectrum of ODDD.
Head and Neck 5
Narrow nose Narrow nose (HP:0000460)
Show evidence (1 reference)
PMID:19338053 SUPPORT Human Clinical
"Patients present with a characteristic facial appearance, narrow nose, and hypoplastic alae nasi."
Supports narrow nose as a characteristic craniofacial manifestation of ODDD.
Enamel hypoplasia FREQUENT Enamel hypoplasia (HP:0006297)
Show evidence (1 reference)
PMID:36990989 SUPPORT Human Clinical
"Enamel hypoplasia, hypomineralization, microdontia, pulp stones, curved roots, and taurodontism were common dental findings in ODDD."
Author wording "common" maps to FREQUENT under the dismech qualitative frequency guideline and directly supports enamel hypoplasia in ODDD.
Microdontia FREQUENT Microdontia (HP:0000691)
Show evidence (1 reference)
PMID:36990989 SUPPORT Human Clinical
"Enamel hypoplasia, hypomineralization, microdontia, pulp stones, curved roots, and taurodontism were common dental findings in ODDD."
Author wording "common" maps to FREQUENT under the dismech qualitative frequency guideline and directly supports microdontia in ODDD.
Hypodontia Hypodontia (HP:0000668)
Show evidence (1 reference)
PMID:29902798 SUPPORT Human Clinical
"Here, we report on a 14-year-old boy with microphthalmia, microcornea, narrow nasal bridge, hypoplastic alae nasi, prominent columnella, hypodontia, dental caries, and partial syndactyly of the 2nd and 3rd toes."
This autosomal recessive ODDD case documents hypodontia in the AR phenotype spectrum.
Taurodontia FREQUENT Taurodontia (HP:0000679)
Show evidence (1 reference)
PMID:36990989 SUPPORT Human Clinical
"Enamel hypoplasia, hypomineralization, microdontia, pulp stones, curved roots, and taurodontism were common dental findings in ODDD."
Author wording "common" maps to FREQUENT under the dismech qualitative frequency guideline and directly supports taurodontia in ODDD.
Musculoskeletal 2
Camptodactyly Camptodactyly (HP:0012385)
Show evidence (1 reference)
PMID:36990989 SUPPORT Human Clinical
"Examination revealed unusual facial features, i.e., long narrow nose, hypertelorism, prominent epicanthal folds along with syndactyly and camptodactyly."
Supports camptodactyly as part of the digital phenotype described in ODDD.
Spastic paraparesis Spastic paraparesis (HP:0002313)
Show evidence (1 reference)
PMID:29927410 SUPPORT Human Clinical
"In about 30% of patients neurological disorders appear later in life: progressive spastic paraparesis, neurogenic bladder/bowel, ataxia, white matter lesions on MRI."
Supports progressive spastic paraparesis as part of the later-onset neurologic spectrum of ODDD.
Nervous System 3
Dysarthria Dysarthria (HP:0001260)
Show evidence (1 reference)
PMID:19338053 SUPPORT Human Clinical
"Neurological problems, including dysarthria, neurogenic bladder disturbances, spastic paraparesis, ataxia, anterior tibial muscle weakness, and seizures, are known to occur"
Supports dysarthria as part of the neurologic phenotype reported in ODDD.
Ataxia Ataxia (HP:0001251)
Show evidence (1 reference)
PMID:29927410 SUPPORT Human Clinical
"In about 30% of patients neurological disorders appear later in life: progressive spastic paraparesis, neurogenic bladder/bowel, ataxia, white matter lesions on MRI."
Supports ataxia as part of the later-onset neurologic phenotype of ODDD.
Seizure Seizure (HP:0001250)
Show evidence (1 reference)
PMID:19338053 SUPPORT Human Clinical
"Neurological problems, including dysarthria, neurogenic bladder disturbances, spastic paraparesis, ataxia, anterior tibial muscle weakness, and seizures, are known to occur"
Supports seizures as part of the neurologic phenotype reported in ODDD.
Other 7
Hypoplastic alae nasi Underdeveloped nasal alae (HP:0000430)
Show evidence (1 reference)
PMID:19338053 SUPPORT Human Clinical
"Patients present with a characteristic facial appearance, narrow nose, and hypoplastic alae nasi."
Supports underdeveloped nasal alae as part of the characteristic ODDD facial appearance.
Short palpebral fissure Short palpebral fissure (HP:0012745)
Show evidence (1 reference)
PMID:32318302 SUPPORT Human Clinical
"The most common eye features reported among all mutations were microcornea, microphthalmia, short palpebral fissures, and glaucoma."
Supports short palpebral fissures as a recognized ocular adnexal feature of ODDD.
Enamel hypomineralization FREQUENT Enamel hypomineralization (HP:0006285)
Show evidence (1 reference)
PMID:36990989 SUPPORT Human Clinical
"Enamel hypoplasia, hypomineralization, microdontia, pulp stones, curved roots, and taurodontism were common dental findings in ODDD."
Author wording "common" maps to FREQUENT under the dismech qualitative frequency guideline and directly supports enamel hypomineralization in ODDD.
Pulp calcification FREQUENT Pulp calcification (HP:0003771)
Show evidence (1 reference)
PMID:36990989 SUPPORT Human Clinical
"Enamel hypoplasia, hypomineralization, microdontia, pulp stones, curved roots, and taurodontism were common dental findings in ODDD."
Author wording "common" maps to FREQUENT under the dismech qualitative frequency guideline and directly supports pulp calcification in ODDD.
Curved dental root FREQUENT Curved dental root (HP:4000104)
Show evidence (1 reference)
PMID:36990989 SUPPORT Human Clinical
"Enamel hypoplasia, hypomineralization, microdontia, pulp stones, curved roots, and taurodontism were common dental findings in ODDD."
Author wording "common" maps to FREQUENT under the dismech qualitative frequency guideline and directly supports curved dental roots in ODDD.
4-5 finger cutaneous syndactyly VERY_FREQUENT 4-5 finger cutaneous syndactyly (HP:0010705)
Show evidence (1 reference)
PMID:29927410 SUPPORT Human Clinical
"Typical features are syndactyly of IV-V or III-V fingers with/without feet syndactyly, anomalies of eyes, teeth, hair and nose."
Author wording "typical" maps to VERY_FREQUENT under the dismech qualitative frequency guideline and directly supports characteristic 4-5 finger cutaneous syndactyly in ODDD.
CNS hypomyelination CNS hypomyelination (HP:0003429)
Show evidence (1 reference)
PMID:31023660 SUPPORT Human Clinical
"Cerebral MR imaging revealed variable white matter abnormalities, consistent with a hypomyelination pattern"
Supports CNS hypomyelination as a neuroimaging manifestation in neurologically affected ODDD patients with GJA1 variants.
🧬

Genetic Associations

1
GJA1 (Connexin 43) (Causative)
Autosomal dominant Autosomal recessive
Show evidence (2 references)
PMID:19338053 SUPPORT Human Clinical
"we present 28 new cases with 18 novel GJA1 mutations. We include tables summarizing the 62 known GJA1 nucleotide changes leading to Cx43 protein alterations and the phenotypic information available on 177 affected individuals from 54 genotyped families."
Comprehensive summary of 62 GJA1 mutations across 54 families establishes the definitive gene-disease association.
PMID:12457340 SUPPORT Human Clinical
"We found mutations in the GJA1 gene in all 17 families with oculodentodigital dysplasia that we screened."
The original study found GJA1 mutations in 100% of screened ODDD families.
💊

Treatments

5
Ophthalmologic Surveillance and Glaucoma Management
Action: supportive care MAXO:0000950
Patients need regular ophthalmologic surveillance for microcornea, microphthalmia, angle narrowing, ciliary body cysts, and glaucoma. Management includes tonometry and gonioscopy, ultrasound biomicroscopy when indicated, topical pressure-lowering therapy when useful, and glaucoma surgery such as tube shunt placement for refractory angle-closure disease.
Target Phenotypes: Glaucoma ↗ Microcornea ↗ Microphthalmia ↗
Show evidence (2 references)
PMID:26743931 SUPPORT Human Clinical
"Subsequent serial gonioscopy every 3 months showed gradual narrowing of the right eye angle and finally three-and-a-half years after tube placement of the left eye, her right eye IOP became uncontrolled with medications alone and a tube shunt was similarly placed in the right eye."
This supports close angle surveillance and escalation from medications to tube shunt surgery when glaucoma is uncontrolled.
PMID:26743931 SUPPORT Human Clinical
"We believe that early screening for ciliary body cysts is important in patients with oculodentodigital dysplasia."
Directly supports proactive ocular screening for the ciliary-body-cyst mechanism of angle closure.
Dental Preventive and Restorative Management
Action: supportive care MAXO:0000950
Dental care should start early and combine meticulous oral hygiene, preventive care, treatment of caries and enamel defects, restorative rehabilitation, and multidisciplinary dental follow-up to preserve function and occlusion.
Target Phenotypes: Enamel hypoplasia ↗ Microdontia ↗ Pulp stone ↗
Show evidence (2 references)
PMID:20587963 SUPPORT Human Clinical
"Early diagnosis with a proper treatment plan and meticulous oral hygiene program helps eliminate the necessity of multiple tooth extractions."
This pediatric dental case directly supports early preventive planning and oral hygiene to reduce destructive dental outcomes.
PMID:36990989 SUPPORT Human Clinical
"Immediate treatment should be focused on the correction of current oral condition and symptomatic treatment. In the long term, attention should be diverted to prevent tooth wear and maintaining the occlusal vertical dimension to establish adequate function."
The systematic dental review supports both immediate restorative treatment and long-term preventive dental management.
Neurologic Monitoring and Symptom-Directed Care
Action: supportive care MAXO:0000950
Neurologic follow-up is indicated when spasticity, ataxia, dysarthria, seizures, neurogenic bladder, or other neurologic signs are present. Care includes neurologic examination, brain MRI when indicated, seizure treatment, spasticity and mobility management, and bladder/bowel management.
Target Phenotypes: Spastic paraparesis ↗ Seizure ↗ Cerebral hypomyelination ↗
Show evidence (2 references)
PMID:29927410 SUPPORT Human Clinical
"In about 30% of patients neurological disorders appear later in life: progressive spastic paraparesis, neurogenic bladder/bowel, ataxia, white matter lesions on MRI."
This supports ongoing neurologic monitoring for later-onset neurologic manifestations.
PMID:31023660 SUPPORT Human Clinical
"Patients with the more prominent basal ganglia abnormalities were the most disabled ones."
This supports using neuroimaging findings to contextualize neurologic severity and disability.
Hand and Limb Orthopedic Evaluation
Action: surgical procedure MAXO:0000004
Hand, foot, and limb evaluation should assess syndactyly, camptodactyly, and functional limitations, with referral to hand surgery or orthopedics when deformities impair function or require reconstruction.
Target Phenotypes: 4-5 finger cutaneous syndactyly ↗ Camptodactyly ↗
Show evidence (1 reference)
PMID:29927410 PARTIAL Human Clinical
"Typical features are syndactyly of IV-V or III-V fingers with/without feet syndactyly, anomalies of eyes, teeth, hair and nose."
This supports the need to assess characteristic limb malformations; the decision for surgery depends on anatomy and function.
Genetic Counseling
Action: genetic counseling MAXO:0000079
Counseling should address predominant autosomal dominant inheritance with variable expressivity and high penetrance, rare autosomal recessive families with carrier parents, testing of at-risk relatives, and reproductive options once the familial GJA1 variant is known.
Show evidence (2 references)
PMID:19338053 SUPPORT Human Clinical
"The predominantly autosomal dominant disorder, oculodentodigital dysplasia (ODDD) has high penetrance with intra- and interfamilial phenotypic variability."
Supports counseling for the predominant dominant, variably expressive form.
PMID:29902798 SUPPORT Human Clinical
"His phenotypically normal parents were found to be carriers of the same mutation. This is the third family in the literature in which ODDD segregates in an autosomal recessive manner."
Supports counseling for rare recessive ODDD families and carrier parents.
{ }

Source YAML

click to show 
name: Oculodentodigital Dysplasia
creation_date: '2026-04-04T12:00:00Z'
updated_date: '2026-04-19T07:26:55Z'
category: Mendelian
description: >
  Oculodentodigital dysplasia (ODDD) is a rare pleiotropic disorder caused by mutations
  in GJA1, which encodes connexin 43 (Cx43), the most widely expressed gap junction
  protein. Most cases are autosomal dominant with high penetrance and variable
  expressivity; rare autosomal recessive forms with more severe phenotypes have been
  reported. The hallmark features are craniofacial dysmorphism (narrow nose with
  hypoplastic alae nasi), ocular anomalies (microphthalmia, microcornea), dental
  abnormalities (microdontia, enamel hypoplasia, taurodontia), and digital
  malformations (type III syndactyly of the fourth and fifth fingers,
  camptodactyly). Neurological involvement including spastic paraplegia,
  dysarthria, ataxia, neurogenic bladder, and seizures occurs in a significant
  minority. Conductive hearing impairment, skin/hair/nail anomalies, and rare
  cardiac defects are additional reported features. Dominant-negative GJA1
  mutations impair gap junction intercellular communication, disrupting
  coordinated signaling in tissues that depend on Cx43-mediated coupling.
  Allelic conditions include erythrokeratodermia variabilis et progressiva
  (MONDO:0033013) and palmoplantar keratoderma with congenital alopecia
  (MONDO:0007083), reflecting the broad phenotypic spectrum of GJA1
  dysfunction.
disease_term:
  preferred_term: oculodentodigital dysplasia
  term:
    id: MONDO:0008111
    label: oculodentodigital dysplasia
parents:
- Ectodermal dysplasia syndrome
- Skeletal dysplasia
- Connexinopathy
has_subtypes:
- name: AD
  display_name: Autosomal Dominant ODDD
  description: >
    Classical form, caused by heterozygous dominant-negative GJA1 mutations.
    Accounts for the vast majority of reported cases. Variable expressivity
    but high penetrance.
- name: AR
  display_name: Autosomal Recessive ODDD
  description: >
    Rare form caused by homozygous or compound heterozygous loss-of-function
    GJA1 mutations. Tends to present with more severe features. Only a
    handful of families reported worldwide.
inheritance:
- name: Autosomal dominant
  inheritance_term:
    preferred_term: Autosomal dominant inheritance
    term:
      id: HP:0000006
      label: Autosomal dominant inheritance
  penetrance: INCOMPLETE
  description: >
    ODDD is predominantly autosomal dominant with high penetrance and intra- and
    interfamilial phenotypic variability. Over 62 different GJA1 mutations have
    been identified across more than 50 families. The dominant-negative mechanism
    means that the mutant Cx43 protein interferes with wild-type Cx43 in gap
    junction assembly.
  evidence:
  - reference: PMID:19338053
    reference_title: "GJA1 mutations, variants, and connexin 43 dysfunction as it relates to the oculodentodigital dysplasia phenotype."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "The predominantly autosomal dominant disorder, oculodentodigital dysplasia (ODDD) has high penetrance with intra- and interfamilial phenotypic variability."
    explanation: Directly states AD inheritance with high penetrance and variable expressivity in ODDD.
  - reference: PMID:12457340
    reference_title: "Connexin 43 (GJA1) mutations cause the pleiotropic phenotype of oculodentodigital dysplasia."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "We found mutations in the GJA1 gene in all 17 families with oculodentodigital dysplasia that we screened. Sixteen different missense mutations and one codon duplication were detected."
    explanation: Demonstrates the genetic basis of ODDD across multiple families with diverse GJA1 mutations.
- name: Autosomal recessive
  inheritance_term:
    preferred_term: Autosomal recessive inheritance
    term:
      id: HP:0000007
      label: Autosomal recessive inheritance
  description: >
    Rare autosomal recessive ODDD has been documented in a small number of families,
    caused by homozygous loss-of-function mutations (e.g. R76H, R33X, R148X).
    Recessive cases may exhibit a more severe phenotype. The mechanisms differ from
    dominant cases: loss-of-function rather than dominant-negative effects.
  evidence:
  - reference: PMID:23606748
    reference_title: "Autosomal recessive GJA1 (Cx43) gene mutations cause oculodentodigital dysplasia by distinct mechanisms."
    supports: SUPPORT
    evidence_source: IN_VITRO
    snippet: "Surprisingly, there have been two autosomal recessive mutations reported that cause ODDD: a single amino acid substitution (R76H) and a premature truncation mutation (R33X)."
    explanation: Documents two distinct AR mutations causing ODDD by different molecular mechanisms.
  - reference: PMID:29902798
    reference_title: "Autosomal Recessive Oculodentodigital Dysplasia: A Case Report and Review of the Literature."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "a novel homozygous mutation (c.442C>T, p.Arg148Ter) was determined in the GJA1 gene leading to a premature stop codon. His phenotypically normal parents were found to be carriers of the same mutation. This is the third family in the literature in which ODDD segregates in an autosomal recessive manner."
    explanation: Reports a third AR family with a homozygous truncating mutation, confirming recessive inheritance in ODDD.
phenotypes:
- category: Craniofacial
  name: Narrow nose
  description: >
    A narrow or pinched nose is part of the characteristic craniofacial gestalt
    of ODDD.
  phenotype_term:
    preferred_term: Narrow nose
    term:
      id: HP:0000460
      label: Narrow nose
  evidence:
  - reference: PMID:19338053
    reference_title: "GJA1 mutations, variants, and connexin 43 dysfunction as it relates to the oculodentodigital dysplasia phenotype."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Patients present with a characteristic facial appearance, narrow nose, and hypoplastic alae nasi."
    explanation: Supports narrow nose as a characteristic craniofacial manifestation of ODDD.
- category: Craniofacial
  name: Hypoplastic alae nasi
  description: >
    Underdeveloped nasal alae are a recurrent and distinctive part of the nasal
    phenotype in ODDD.
  phenotype_term:
    preferred_term: Hypoplastic alae nasi
    term:
      id: HP:0000430
      label: Underdeveloped nasal alae
  evidence:
  - reference: PMID:19338053
    reference_title: "GJA1 mutations, variants, and connexin 43 dysfunction as it relates to the oculodentodigital dysplasia phenotype."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Patients present with a characteristic facial appearance, narrow nose, and hypoplastic alae nasi."
    explanation: Supports underdeveloped nasal alae as part of the characteristic ODDD facial appearance.
- category: Ophthalmological
  name: Microphthalmia
  description: >
    Small eyes are among the most commonly reported ocular manifestations of ODDD.
  phenotype_term:
    preferred_term: Microphthalmia
    term:
      id: HP:0000568
      label: Microphthalmia
  frequency: FREQUENT
  evidence:
  - reference: PMID:32318302
    reference_title: "Oculodentodigital Dysplasia: A Case Report and Major Review of the Eye and Ocular Adnexa Features of 295 Reported Cases."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "The most common eye features reported among all mutations were microcornea, microphthalmia, short palpebral fissures, and glaucoma."
    explanation: Supports microphthalmia as one of the core ocular manifestations reported across published ODDD cases.
- category: Ophthalmological
  name: Microcornea
  description: >
    Abnormally small corneas are a recurrent ocular finding in ODDD and often
    accompany microphthalmia.
  phenotype_term:
    preferred_term: Microcornea
    term:
      id: HP:0000482
      label: Microcornea
  frequency: FREQUENT
  evidence:
  - reference: PMID:32318302
    reference_title: "Oculodentodigital Dysplasia: A Case Report and Major Review of the Eye and Ocular Adnexa Features of 295 Reported Cases."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "The most common eye features reported among all mutations were microcornea, microphthalmia, short palpebral fissures, and glaucoma."
    explanation: Supports microcornea as a recurrent ocular phenotype in ODDD.
- category: Ophthalmological
  name: Short palpebral fissure
  description: >
    Short palpebral fissures are part of the recognized ocular adnexal phenotype
    in ODDD.
  phenotype_term:
    preferred_term: Short palpebral fissure
    term:
      id: HP:0012745
      label: Short palpebral fissure
  evidence:
  - reference: PMID:32318302
    reference_title: "Oculodentodigital Dysplasia: A Case Report and Major Review of the Eye and Ocular Adnexa Features of 295 Reported Cases."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "The most common eye features reported among all mutations were microcornea, microphthalmia, short palpebral fissures, and glaucoma."
    explanation: Supports short palpebral fissures as a recognized ocular adnexal feature of ODDD.
- category: Ophthalmological
  name: Glaucoma
  subtype: AD
  description: >
    Glaucoma is a clinically important ocular complication in ODDD and may
    threaten vision.
  phenotype_term:
    preferred_term: Glaucoma
    term:
      id: HP:0000501
      label: Glaucoma
  frequency: OCCASIONAL
  evidence:
  - reference: PMID:32318302
    reference_title: "Oculodentodigital Dysplasia: A Case Report and Major Review of the Eye and Ocular Adnexa Features of 295 Reported Cases."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "The most common eye features reported among all mutations were microcornea, microphthalmia, short palpebral fissures, and glaucoma."
    explanation: Supports glaucoma as one of the major ocular manifestations reported across published ODDD cases.
  - reference: PMID:34035645
    reference_title: "Heterozygous GJA1 variants with ocular phenotype: Missense in domain but truncation out of domain."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Of the 116 patients, glaucoma was observed in 26.7% (31/116), among whom 77.4% (24/31) of cases occurred in patients ≥10 years old."
    explanation: In the literature review subset with ocular signs, glaucoma affected 31/116 patients and usually presented after age 10, underscoring its clinical importance.
- category: Dental
  name: Enamel hypoplasia
  description: >
    Defective enamel formation is a recurrent dental abnormality in ODDD and
    contributes to structural tooth fragility.
  phenotype_term:
    preferred_term: Enamel hypoplasia
    term:
      id: HP:0006297
      label: Enamel hypoplasia
  frequency: FREQUENT
  evidence:
  - reference: PMID:36990989
    reference_title: "Oculo-dento-digital dysplasia: a systematic analysis of published dental literature."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Enamel hypoplasia, hypomineralization, microdontia, pulp stones, curved roots, and taurodontism were common dental findings in ODDD."
    explanation: Author wording "common" maps to FREQUENT under the dismech qualitative frequency guideline and directly supports enamel hypoplasia in ODDD.
- category: Dental
  name: Enamel hypomineralization
  description: >
    Defective mineralization of dental enamel is part of the structural dental
    phenotype in ODDD.
  phenotype_term:
    preferred_term: Enamel hypomineralization
    term:
      id: HP:0006285
      label: Enamel hypomineralization
  frequency: FREQUENT
  evidence:
  - reference: PMID:36990989
    reference_title: "Oculo-dento-digital dysplasia: a systematic analysis of published dental literature."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Enamel hypoplasia, hypomineralization, microdontia, pulp stones, curved roots, and taurodontism were common dental findings in ODDD."
    explanation: Author wording "common" maps to FREQUENT under the dismech qualitative frequency guideline and directly supports enamel hypomineralization in ODDD.
- category: Dental
  name: Microdontia
  description: >
    Small teeth are a recurrent dental manifestation of ODDD.
  phenotype_term:
    preferred_term: Microdontia
    term:
      id: HP:0000691
      label: Microdontia
  frequency: FREQUENT
  evidence:
  - reference: PMID:36990989
    reference_title: "Oculo-dento-digital dysplasia: a systematic analysis of published dental literature."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Enamel hypoplasia, hypomineralization, microdontia, pulp stones, curved roots, and taurodontism were common dental findings in ODDD."
    explanation: Author wording "common" maps to FREQUENT under the dismech qualitative frequency guideline and directly supports microdontia in ODDD.
- category: Dental
  name: Hypodontia
  subtype: AR
  description: >
    Hypodontia has been reported in an autosomal recessive ODDD case with a
    homozygous truncating GJA1 variant.
  phenotype_term:
    preferred_term: Hypodontia
    term:
      id: HP:0000668
      label: Hypodontia
  evidence:
  - reference: PMID:29902798
    reference_title: "Autosomal Recessive Oculodentodigital Dysplasia: A Case Report and Review of the Literature."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: >-
      Here, we report on a 14-year-old boy with microphthalmia, microcornea,
      narrow nasal bridge, hypoplastic alae nasi, prominent columnella,
      hypodontia, dental caries, and partial syndactyly of the 2nd and 3rd toes.
    explanation: >-
      This autosomal recessive ODDD case documents hypodontia in the AR
      phenotype spectrum.
- category: Dental
  name: Pulp calcification
  description: >
    Calcified pulp stones are reported among the recurrent radiographic dental
    findings in ODDD.
  phenotype_term:
    preferred_term: Pulp stone
    term:
      id: HP:0003771
      label: Pulp calcification
  frequency: FREQUENT
  evidence:
  - reference: PMID:36990989
    reference_title: "Oculo-dento-digital dysplasia: a systematic analysis of published dental literature."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Enamel hypoplasia, hypomineralization, microdontia, pulp stones, curved roots, and taurodontism were common dental findings in ODDD."
    explanation: Author wording "common" maps to FREQUENT under the dismech qualitative frequency guideline and directly supports pulp calcification in ODDD.
- category: Dental
  name: Curved dental root
  description: >
    Abnormally curved dental roots are part of the recurrent dental morphology
    reported in ODDD.
  phenotype_term:
    preferred_term: Curved dental root
    term:
      id: HP:4000104
      label: Curved dental root
  frequency: FREQUENT
  evidence:
  - reference: PMID:36990989
    reference_title: "Oculo-dento-digital dysplasia: a systematic analysis of published dental literature."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Enamel hypoplasia, hypomineralization, microdontia, pulp stones, curved roots, and taurodontism were common dental findings in ODDD."
    explanation: Author wording "common" maps to FREQUENT under the dismech qualitative frequency guideline and directly supports curved dental roots in ODDD.
- category: Dental
  name: Taurodontia
  description: >
    Enlarged pulp chambers with apically displaced furcations are part of the
    structural dental phenotype in ODDD.
  phenotype_term:
    preferred_term: Taurodontia
    term:
      id: HP:0000679
      label: Taurodontia
  frequency: FREQUENT
  evidence:
  - reference: PMID:36990989
    reference_title: "Oculo-dento-digital dysplasia: a systematic analysis of published dental literature."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Enamel hypoplasia, hypomineralization, microdontia, pulp stones, curved roots, and taurodontism were common dental findings in ODDD."
    explanation: Author wording "common" maps to FREQUENT under the dismech qualitative frequency guideline and directly supports taurodontia in ODDD.
- category: Musculoskeletal
  name: 4-5 finger cutaneous syndactyly
  description: >
    Cutaneous syndactyly of the fourth and fifth fingers is the characteristic
    digital malformation in ODDD; some patients also have third-finger or foot
    syndactyly.
  phenotype_term:
    preferred_term: 4-5 finger cutaneous syndactyly
    term:
      id: HP:0010705
      label: 4-5 finger cutaneous syndactyly
  frequency: VERY_FREQUENT
  evidence:
  - reference: PMID:29927410
    reference_title: "[Neurological presentations of oculodentodigital dysplasia]."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Typical features are syndactyly of IV-V or III-V fingers with/without feet syndactyly, anomalies of eyes, teeth, hair and nose."
    explanation: Author wording "typical" maps to VERY_FREQUENT under the dismech qualitative frequency guideline and directly supports characteristic 4-5 finger cutaneous syndactyly in ODDD.
- category: Musculoskeletal
  name: Camptodactyly
  description: >
    Permanent flexion contracture of the fingers occurs as part of the digital
    phenotype in some patients with ODDD.
  phenotype_term:
    preferred_term: Camptodactyly
    term:
      id: HP:0012385
      label: Camptodactyly
  evidence:
  - reference: PMID:36990989
    reference_title: "Oculo-dento-digital dysplasia: a systematic analysis of published dental literature."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Examination revealed unusual facial features, i.e., long narrow nose, hypertelorism, prominent epicanthal folds along with syndactyly and camptodactyly."
    explanation: Supports camptodactyly as part of the digital phenotype described in ODDD.
- category: Neurological
  name: Spastic paraparesis
  description: >
    Progressive lower-extremity spasticity is a prominent neurologic
    manifestation of ODDD and may emerge later in life.
  phenotype_term:
    preferred_term: Spastic paraparesis
    term:
      id: HP:0002313
      label: Spastic paraparesis
  evidence:
  - reference: PMID:29927410
    reference_title: "[Neurological presentations of oculodentodigital dysplasia]."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "In about 30% of patients neurological disorders appear later in life: progressive spastic paraparesis, neurogenic bladder/bowel, ataxia, white matter lesions on MRI."
    explanation: Supports progressive spastic paraparesis as part of the later-onset neurologic spectrum of ODDD.
- category: Neurological
  name: Dysarthria
  description: >
    Dysarthria is part of the recognized neurologic phenotype in ODDD.
  phenotype_term:
    preferred_term: Dysarthria
    term:
      id: HP:0001260
      label: Dysarthria
  evidence:
  - reference: PMID:19338053
    reference_title: "GJA1 mutations, variants, and connexin 43 dysfunction as it relates to the oculodentodigital dysplasia phenotype."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Neurological problems, including dysarthria, neurogenic bladder disturbances, spastic paraparesis, ataxia, anterior tibial muscle weakness, and seizures, are known to occur"
    explanation: Supports dysarthria as part of the neurologic phenotype reported in ODDD.
- category: Neurological
  name: Neurogenic bladder
  description: >
    Urinary dysfunction due to neurogenic bladder can accompany neurologic
    involvement in ODDD.
  phenotype_term:
    preferred_term: Neurogenic bladder
    term:
      id: HP:0000011
      label: Neurogenic bladder
  evidence:
  - reference: PMID:29927410
    reference_title: "[Neurological presentations of oculodentodigital dysplasia]."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "In about 30% of patients neurological disorders appear later in life: progressive spastic paraparesis, neurogenic bladder/bowel, ataxia, white matter lesions on MRI."
    explanation: Supports neurogenic bladder as part of the later-onset neurologic spectrum of ODDD.
- category: Neurological
  name: Ataxia
  description: >
    Cerebellar-type gait and coordination impairment have been reported within
    the neurologic spectrum of ODDD.
  phenotype_term:
    preferred_term: Ataxia
    term:
      id: HP:0001251
      label: Ataxia
  evidence:
  - reference: PMID:29927410
    reference_title: "[Neurological presentations of oculodentodigital dysplasia]."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "In about 30% of patients neurological disorders appear later in life: progressive spastic paraparesis, neurogenic bladder/bowel, ataxia, white matter lesions on MRI."
    explanation: Supports ataxia as part of the later-onset neurologic phenotype of ODDD.
- category: Neurological
  name: Seizure
  description: >
    Seizures are part of the broader neurologic phenotype reported in ODDD.
  phenotype_term:
    preferred_term: Seizure
    term:
      id: HP:0001250
      label: Seizure
  evidence:
  - reference: PMID:19338053
    reference_title: "GJA1 mutations, variants, and connexin 43 dysfunction as it relates to the oculodentodigital dysplasia phenotype."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Neurological problems, including dysarthria, neurogenic bladder disturbances, spastic paraparesis, ataxia, anterior tibial muscle weakness, and seizures, are known to occur"
    explanation: Supports seizures as part of the neurologic phenotype reported in ODDD.
- category: Neurological
  name: CNS hypomyelination
  subtype: AD
  description: >
    In neurologically affected individuals, brain MRI can show white matter
    abnormalities consistent with cerebral hypomyelination.
  phenotype_term:
    preferred_term: Cerebral hypomyelination
    term:
      id: HP:0003429
      label: CNS hypomyelination
  evidence:
  - reference: PMID:31023660
    reference_title: "GJA1 Variants Cause Spastic Paraplegia Associated with Cerebral Hypomyelination."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Cerebral MR imaging revealed variable white matter abnormalities, consistent with a hypomyelination pattern"
    explanation: Supports CNS hypomyelination as a neuroimaging manifestation in neurologically affected ODDD patients with GJA1 variants.
- category: Audiological
  name: Conductive hearing impairment
  description: >
    Conductive hearing impairment is a recognized but non-universal auditory
    manifestation of ODDD.
  phenotype_term:
    preferred_term: Conductive hearing impairment
    term:
      id: HP:0000405
      label: Conductive hearing impairment
  evidence:
  - reference: PMID:12457340
    reference_title: "Connexin 43 (GJA1) mutations cause the pleiotropic phenotype of oculodentodigital dysplasia."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Syndactyly type III and conductive deafness can occur in some cases, and cardiac abnormalities are observed in rare instances."
    explanation: Supports conductive hearing impairment as an additional but non-universal manifestation of ODDD.
diagnosis:
- name: Clinical ODDD Recognition
  description: >-
    Clinical diagnosis is suspected from the characteristic craniofacial,
    ocular, dental, and digital pattern: narrow nose with hypoplastic alae nasi,
    microphthalmia or microcornea, dental anomalies, and syndactyly or related
    hand/foot findings. Neurologic, hearing, cardiac, skin, hair, and nail
    involvement should be actively assessed because expression is variable.
  diagnosis_term:
    preferred_term: clinical assessment
    term:
      id: MAXO:0000487
      label: clinical assessment
  evidence:
  - reference: PMID:19338053
    reference_title: "GJA1 mutations, variants, and connexin 43 dysfunction as it relates to the oculodentodigital dysplasia phenotype."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: >-
      Abnormalities observed in ODDD affect the eye, dentition, and digits of
      the hands and feet. Patients present with a characteristic facial
      appearance, narrow nose, and hypoplastic alae nasi.
    explanation: >-
      This summary supports the core clinical pattern used to recognize ODDD.
- name: GJA1 Molecular Testing
  description: >-
    Sequencing-based GJA1 testing confirms the diagnosis in typical autosomal
    dominant ODDD and should include consideration of recessive or truncating
    variants when the phenotype or family history suggests biallelic disease.
  diagnosis_term:
    preferred_term: genetic testing
    term:
      id: MAXO:0000127
      label: genetic testing
  evidence:
  - reference: PMID:12457340
    reference_title: "Connexin 43 (GJA1) mutations cause the pleiotropic phenotype of oculodentodigital dysplasia."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "We found mutations in the GJA1 gene in all 17 families with oculodentodigital dysplasia that we screened."
    explanation: >-
      The original gene-discovery study supports GJA1 molecular testing for
      ODDD.
  - reference: PMID:19338053
    reference_title: "GJA1 mutations, variants, and connexin 43 dysfunction as it relates to the oculodentodigital dysplasia phenotype."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: >-
      We include tables summarizing the 62 known GJA1 nucleotide changes
      leading to Cx43 protein alterations and the phenotypic information
      available on 177 affected individuals from 54 genotyped families.
    explanation: >-
      This mutation review supports broad GJA1 variant interpretation across
      genotyped ODDD families.
- name: Baseline Ophthalmologic, Dental, Neurologic, and Audiologic Workup
  description: >-
    Baseline workup should prioritize ophthalmology because glaucoma can be
    vision-threatening, dental evaluation because structural tooth defects are
    common and actionable, neurologic assessment with brain MRI when symptoms
    are present, and audiology when conductive hearing loss is suspected.
  diagnosis_term:
    preferred_term: clinical assessment
    term:
      id: MAXO:0000487
      label: clinical assessment
  evidence:
  - reference: PMID:32318302
    reference_title: "Oculodentodigital Dysplasia: A Case Report and Major Review of the Eye and Ocular Adnexa Features of 295 Reported Cases."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: >-
      The most common eye features reported among all mutations were
      microcornea, microphthalmia, short palpebral fissures, and glaucoma.
    explanation: >-
      The ocular review supports baseline ophthalmologic assessment and ongoing
      attention to glaucoma risk.
  - reference: PMID:26743931
    reference_title: "Case report: imaging and treatment of ophthalmic manifestations in oculodentodigital dysplasia."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: >-
      Ultrasound biomicroscopy revealed ciliary body cysts in the left eye, and
      gonioscopy confirmed chronic angle closure.
    explanation: >-
      This case supports gonioscopy and ultrasound biomicroscopy when evaluating
      ODDD glaucoma risk.
  - reference: PMID:36990989
    reference_title: "Oculo-dento-digital dysplasia: a systematic analysis of published dental literature."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: >-
      Enamel hypoplasia, hypomineralization, microdontia, pulp stones, curved
      roots, and taurodontism were common dental findings in ODDD.
    explanation: >-
      Common dental structural abnormalities justify baseline dental assessment.
  - reference: PMID:31023660
    reference_title: "GJA1 Variants Cause Spastic Paraplegia Associated with Cerebral Hypomyelination."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: >-
      Cerebral MR imaging revealed variable white matter abnormalities,
      consistent with a hypomyelination pattern, and bilateral hypointense
      signal of the basal ganglia on T2-weighted images and/or magnetic
      susceptibility sequences
    explanation: >-
      Brain MRI is relevant when neurologic manifestations are present.
treatments:
- name: Ophthalmologic Surveillance and Glaucoma Management
  description: >-
    Patients need regular ophthalmologic surveillance for microcornea,
    microphthalmia, angle narrowing, ciliary body cysts, and glaucoma. Management
    includes tonometry and gonioscopy, ultrasound biomicroscopy when indicated,
    topical pressure-lowering therapy when useful, and glaucoma surgery such as
    tube shunt placement for refractory angle-closure disease.
  treatment_term:
    preferred_term: supportive care
    term:
      id: MAXO:0000950
      label: supportive care
  target_phenotypes:
  - preferred_term: Glaucoma
    term:
      id: HP:0000501
      label: Glaucoma
  - preferred_term: Microcornea
    term:
      id: HP:0000482
      label: Microcornea
  - preferred_term: Microphthalmia
    term:
      id: HP:0000568
      label: Microphthalmia
  evidence:
  - reference: PMID:26743931
    reference_title: "Case report: imaging and treatment of ophthalmic manifestations in oculodentodigital dysplasia."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: >-
      Subsequent serial gonioscopy every 3 months showed gradual narrowing of
      the right eye angle and finally three-and-a-half years after tube
      placement of the left eye, her right eye IOP became uncontrolled with
      medications alone and a tube shunt was similarly placed in the right eye.
    explanation: >-
      This supports close angle surveillance and escalation from medications to
      tube shunt surgery when glaucoma is uncontrolled.
  - reference: PMID:26743931
    reference_title: "Case report: imaging and treatment of ophthalmic manifestations in oculodentodigital dysplasia."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: >-
      We believe that early screening for ciliary body cysts is important in
      patients with oculodentodigital dysplasia.
    explanation: >-
      Directly supports proactive ocular screening for the ciliary-body-cyst
      mechanism of angle closure.
- name: Dental Preventive and Restorative Management
  description: >-
    Dental care should start early and combine meticulous oral hygiene,
    preventive care, treatment of caries and enamel defects, restorative
    rehabilitation, and multidisciplinary dental follow-up to preserve function
    and occlusion.
  treatment_term:
    preferred_term: supportive care
    term:
      id: MAXO:0000950
      label: supportive care
  target_phenotypes:
  - preferred_term: Enamel hypoplasia
    term:
      id: HP:0006297
      label: Enamel hypoplasia
  - preferred_term: Microdontia
    term:
      id: HP:0000691
      label: Microdontia
  - preferred_term: Pulp stone
    term:
      id: HP:0003771
      label: Pulp calcification
  evidence:
  - reference: PMID:20587963
    reference_title: "Dental management of oculodentodigital dysplasia: a case report."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: >-
      Early diagnosis with a proper treatment plan and meticulous oral hygiene
      program helps eliminate the necessity of multiple tooth extractions.
    explanation: >-
      This pediatric dental case directly supports early preventive planning and
      oral hygiene to reduce destructive dental outcomes.
  - reference: PMID:36990989
    reference_title: "Oculo-dento-digital dysplasia: a systematic analysis of published dental literature."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: >-
      Immediate treatment should be focused on the correction of current oral
      condition and symptomatic treatment. In the long term, attention should be
      diverted to prevent tooth wear and maintaining the occlusal vertical
      dimension to establish adequate function.
    explanation: >-
      The systematic dental review supports both immediate restorative treatment
      and long-term preventive dental management.
- name: Neurologic Monitoring and Symptom-Directed Care
  description: >-
    Neurologic follow-up is indicated when spasticity, ataxia, dysarthria,
    seizures, neurogenic bladder, or other neurologic signs are present. Care
    includes neurologic examination, brain MRI when indicated, seizure treatment,
    spasticity and mobility management, and bladder/bowel management.
  treatment_term:
    preferred_term: supportive care
    term:
      id: MAXO:0000950
      label: supportive care
  target_phenotypes:
  - preferred_term: Spastic paraparesis
    term:
      id: HP:0002313
      label: Spastic paraparesis
  - preferred_term: Seizure
    term:
      id: HP:0001250
      label: Seizure
  - preferred_term: Cerebral hypomyelination
    term:
      id: HP:0003429
      label: CNS hypomyelination
  evidence:
  - reference: PMID:29927410
    reference_title: "[Neurological presentations of oculodentodigital dysplasia]."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: >-
      In about 30% of patients neurological disorders appear later in life:
      progressive spastic paraparesis, neurogenic bladder/bowel, ataxia, white
      matter lesions on MRI.
    explanation: >-
      This supports ongoing neurologic monitoring for later-onset neurologic
      manifestations.
  - reference: PMID:31023660
    reference_title: "GJA1 Variants Cause Spastic Paraplegia Associated with Cerebral Hypomyelination."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: >-
      Patients with the more prominent basal ganglia abnormalities were the most
      disabled ones.
    explanation: >-
      This supports using neuroimaging findings to contextualize neurologic
      severity and disability.
- name: Hand and Limb Orthopedic Evaluation
  description: >-
    Hand, foot, and limb evaluation should assess syndactyly, camptodactyly, and
    functional limitations, with referral to hand surgery or orthopedics when
    deformities impair function or require reconstruction.
  treatment_term:
    preferred_term: surgical procedure
    term:
      id: MAXO:0000004
      label: surgical procedure
  target_phenotypes:
  - preferred_term: 4-5 finger cutaneous syndactyly
    term:
      id: HP:0010705
      label: 4-5 finger cutaneous syndactyly
  - preferred_term: Camptodactyly
    term:
      id: HP:0012385
      label: Camptodactyly
  evidence:
  - reference: PMID:29927410
    reference_title: "[Neurological presentations of oculodentodigital dysplasia]."
    supports: PARTIAL
    evidence_source: HUMAN_CLINICAL
    snippet: >-
      Typical features are syndactyly of IV-V or III-V fingers with/without
      feet syndactyly, anomalies of eyes, teeth, hair and nose.
    explanation: >-
      This supports the need to assess characteristic limb malformations; the
      decision for surgery depends on anatomy and function.
- name: Genetic Counseling
  description: >-
    Counseling should address predominant autosomal dominant inheritance with
    variable expressivity and high penetrance, rare autosomal recessive families
    with carrier parents, testing of at-risk relatives, and reproductive options
    once the familial GJA1 variant is known.
  treatment_term:
    preferred_term: genetic counseling
    term:
      id: MAXO:0000079
      label: genetic counseling
  evidence:
  - reference: PMID:19338053
    reference_title: "GJA1 mutations, variants, and connexin 43 dysfunction as it relates to the oculodentodigital dysplasia phenotype."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: >-
      The predominantly autosomal dominant disorder, oculodentodigital dysplasia
      (ODDD) has high penetrance with intra- and interfamilial phenotypic
      variability.
    explanation: >-
      Supports counseling for the predominant dominant, variably expressive
      form.
  - reference: PMID:29902798
    reference_title: "Autosomal Recessive Oculodentodigital Dysplasia: A Case Report and Review of the Literature."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: >-
      His phenotypically normal parents were found to be carriers of the same
      mutation. This is the third family in the literature in which ODDD
      segregates in an autosomal recessive manner.
    explanation: >-
      Supports counseling for rare recessive ODDD families and carrier parents.
pathophysiology:
- name: Dominant-negative GJA1 mutations disrupt gap junction communication
  description: >
    GJA1 encodes connexin 43 (Cx43), the most widely expressed gap junction
    protein. In the autosomal dominant form, missense mutations produce mutant
    Cx43 that co-assembles with wild-type Cx43 (and other connexins) into
    dysfunctional gap junction channels, exerting a dominant-negative effect.
    This impairs intercellular communication in tissues that critically depend
    on Cx43: craniofacial structures, limb buds, eyes, teeth, brain, and skin.
    Mutations occur across all nine domains of the Cx43 protein and may cause
    misassembly of channels or alter channel conduction properties. The tissue-
    specific phenotypic expression reflects the differential dependence of each
    tissue on Cx43-mediated gap junction intercellular communication (GJIC)
    during development and postnatal life.
  gene:
    preferred_term: GJA1
    description: >
      Gap junction protein alpha 1, encoding connexin 43 (Cx43), the most
      abundant and ubiquitously expressed gap junction protein. Cx43 forms
      hexameric connexons that dock between adjacent cells to create intercellular
      channels permitting passage of ions and small signaling molecules.
    modifier: DECREASED
    term:
      id: hgnc:4274
      label: GJA1
  cell_types:
  - preferred_term: Osteoblast
    term:
      id: CL:0000062
      label: osteoblast
  - preferred_term: Keratinocyte
    term:
      id: CL:0000312
      label: keratinocyte
  - preferred_term: Odontoblast
    term:
      id: CL:0000060
      label: odontoblast
  biological_processes:
  - preferred_term: Gap junction assembly
    term:
      id: GO:0016264
      label: gap junction assembly
    modifier: DECREASED
  - preferred_term: Cell communication via gap junctions
    term:
      id: GO:0007154
      label: cell communication
    modifier: DECREASED
  evidence:
  - reference: PMID:12457340
    reference_title: "Connexin 43 (GJA1) mutations cause the pleiotropic phenotype of oculodentodigital dysplasia."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Gap junctions are assemblies of intercellular channels that regulate a variety of physiologic and developmental processes through the exchange of small ions and signaling molecules."
    explanation: Establishes that gap junctions composed of connexin proteins mediate intercellular signaling critical for development.
  - reference: PMID:12457340
    reference_title: "Connexin 43 (GJA1) mutations cause the pleiotropic phenotype of oculodentodigital dysplasia."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "These mutations may cause misassembly of channels or alter channel conduction properties."
    explanation: Demonstrates that GJA1 mutations disrupt gap junction function through either channel misassembly or altered conduction.
  - reference: PMID:19338053
    reference_title: "GJA1 mutations, variants, and connexin 43 dysfunction as it relates to the oculodentodigital dysplasia phenotype."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Mutations resulting in ODDD occur in each of the nine domains of the Cx43 protein, and we review our functional experiments and those in the literature, examining the effects of 13 different Cx43 mutations upon gap junction activity."
    explanation: Confirms mutations across all Cx43 protein domains affect gap junction activity.
  downstream:
  - target: Craniofacial, dental, and limb developmental anomalies
  - target: Ocular developmental and glaucoma risk
  - target: Neurological dysfunction from impaired CNS gap junctions
- name: Craniofacial, dental, and limb developmental anomalies
  description: >
    Impaired Cx43-mediated GJIC during embryonic development disrupts
    coordinated signaling in neural crest-derived craniofacial structures
    and developing limb buds. This leads to the characteristic narrow nose,
    digital syndactyly, and dental anomalies. Cx43 is essential for osteoblast
    and odontoblast differentiation and function.
  cell_types:
  - preferred_term: Osteoblast
    term:
      id: CL:0000062
      label: osteoblast
  - preferred_term: Odontoblast
    term:
      id: CL:0000060
      label: odontoblast
  biological_processes:
  - preferred_term: Gap junction assembly
    term:
      id: GO:0016264
      label: gap junction assembly
    modifier: DECREASED
  evidence:
  - reference: PMID:12457340
    reference_title: "Connexin 43 (GJA1) mutations cause the pleiotropic phenotype of oculodentodigital dysplasia."
    supports: SUPPORT
    evidence_source: MODEL_ORGANISM
    snippet: "Expression patterns and phenotypic features of gja1 animal mutants, reported elsewhere, are compatible with the pleiotropic clinical presentation of oculodentodigital dysplasia."
    explanation: Animal models of gja1 mutations recapitulate the pleiotropic craniofacial and limb phenotypes seen in ODDD.
- name: Ocular developmental and glaucoma risk
  description: >
    GJA1/Cx43 disruption contributes to ocular developmental anomalies such as
    microphthalmia and microcornea, while ciliary body cysts and progressive
    angle closure can drive glaucoma in some patients. This makes ocular disease
    both a developmental feature and a surveillance priority.
  biological_processes:
  - preferred_term: Cell communication via gap junctions
    term:
      id: GO:0007154
      label: cell communication
    modifier: DECREASED
  evidence:
  - reference: PMID:32318302
    reference_title: "Oculodentodigital Dysplasia: A Case Report and Major Review of the Eye and Ocular Adnexa Features of 295 Reported Cases."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: >-
      Mutations most commonly affect the extracellular-1 and cytoplasmic-1
      domains of connexin-43 (gene product of GJA1), predominately manifesting
      in microphthalmia and microcornea.
    explanation: >-
      The ocular review links GJA1/Cx43 variant domains to microphthalmia and
      microcornea as predominant ocular manifestations.
  - reference: PMID:26743931
    reference_title: "Case report: imaging and treatment of ophthalmic manifestations in oculodentodigital dysplasia."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: >-
      This is one of the first reported cases of severe chronic angle- closure
      glaucoma secondary to ciliary body cysts in a patient with
      oculodentodigital dysplasia.
    explanation: >-
      Supports ciliary body cysts and chronic angle closure as one mechanism of
      glaucoma in ODDD.
  downstream:
  - target: Microphthalmia
  - target: Microcornea
  - target: Glaucoma
- name: Neurological dysfunction from impaired CNS gap junctions
  description: >
    Cx43 is the predominant gap junction protein in astrocytes and plays a
    critical role in CNS homeostasis. Disrupted astrocytic gap junction
    networks impair potassium buffering, metabolite exchange, and coordinated
    neural activity, contributing to spastic paraplegia, seizures, ataxia,
    and white matter abnormalities observed in ODDD.
  biological_processes:
  - preferred_term: Cell communication via gap junctions
    term:
      id: GO:0007154
      label: cell communication
    modifier: DECREASED
  evidence:
  - reference: PMID:19338053
    reference_title: "GJA1 mutations, variants, and connexin 43 dysfunction as it relates to the oculodentodigital dysplasia phenotype."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Neurological problems, including dysarthria, neurogenic bladder disturbances, spastic paraparesis, ataxia, anterior tibial muscle weakness, and seizures, are known to occur"
    explanation: Enumerates the neurological manifestations resulting from impaired CNS gap junction function.
- name: Loss-of-function mechanism in autosomal recessive ODDD
  subtypes:
  - AR
  description: >
    In autosomal recessive ODDD, homozygous mutations cause complete loss of
    Cx43 function rather than dominant-negative effects. The R33X truncation
    mutant fails to form functional channels and additionally exerts trans-
    dominant effects on co-expressed connexins (Cx43 and Cx40), potentially
    explaining the greater disease burden in some AR cases. The R76H mutant
    retains partial function with reduced conductance.
  gene:
    preferred_term: GJA1
    description: Homozygous loss-of-function mutations in GJA1 causing complete or near-complete loss of Cx43 gap junction function.
    modifier: DECREASED
    term:
      id: hgnc:4274
      label: GJA1
  biological_processes:
  - preferred_term: Gap junction assembly
    term:
      id: GO:0016264
      label: gap junction assembly
    modifier: DECREASED
  evidence:
  - reference: PMID:23606748
    reference_title: "Autosomal recessive GJA1 (Cx43) gene mutations cause oculodentodigital dysplasia by distinct mechanisms."
    supports: SUPPORT
    evidence_source: IN_VITRO
    snippet: "the trans-dominant effect of R33X together with its complete inability to form a functional channel may explain why patients harboring this autosomal recessive R33X mutant exhibit greater disease burden than patients harboring the R76H mutant."
    explanation: Functional studies reveal distinct mechanisms for the two known AR mutations, explaining phenotypic severity differences.
  - reference: PMID:23606748
    reference_title: "Autosomal recessive GJA1 (Cx43) gene mutations cause oculodentodigital dysplasia by distinct mechanisms."
    supports: SUPPORT
    evidence_source: IN_VITRO
    snippet: "the R76H mutant trafficked to the plasma membrane to form gap junction-like plaques, whereas the R33X mutant remained diffusely localized throughout the cell, including the nucleus."
    explanation: The R76H mutant retains some trafficking and channel formation capacity while R33X is completely non-functional.
genetic:
- name: GJA1 (Connexin 43)
  association: Causative
  gene_term:
    preferred_term: GJA1
    term:
      id: hgnc:4274
      label: GJA1
  inheritance:
  - name: Autosomal dominant
  - name: Autosomal recessive
  features: >
    GJA1 mutations are the sole known cause of ODDD. Over 62 different mutations
    have been identified across all nine domains of the Cx43 protein. Most are
    missense mutations causing dominant-negative effects; rare autosomal recessive
    disease has been reported with both missense (e.g. R76H) and truncating (e.g.
    R33X, R148X) variants.
  evidence:
  - reference: PMID:19338053
    reference_title: "GJA1 mutations, variants, and connexin 43 dysfunction as it relates to the oculodentodigital dysplasia phenotype."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "we present 28 new cases with 18 novel GJA1 mutations. We include tables summarizing the 62 known GJA1 nucleotide changes leading to Cx43 protein alterations and the phenotypic information available on 177 affected individuals from 54 genotyped families."
    explanation: Comprehensive summary of 62 GJA1 mutations across 54 families establishes the definitive gene-disease association.
  - reference: PMID:12457340
    reference_title: "Connexin 43 (GJA1) mutations cause the pleiotropic phenotype of oculodentodigital dysplasia."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "We found mutations in the GJA1 gene in all 17 families with oculodentodigital dysplasia that we screened."
    explanation: The original study found GJA1 mutations in 100% of screened ODDD families.
notes: >-
  ODDD is part of a broader spectrum of GJA1/connexin 43 disorders. Allelic conditions
  include erythrokeratodermia variabilis et progressiva (MONDO:0033013), characterized
  predominantly by skin involvement (erythematous plaques, hyperkeratosis), and
  palmoplantar keratoderma with congenital alopecia (MONDO:0007083). Palmoplantar
  keratosis has also been reported in some ODDD patients, blurring the boundary between
  these conditions. The wide phenotypic spectrum reflects the ubiquitous expression of
  Cx43 and the diverse functional consequences of different mutations on gap junction
  assembly and conductance. Cardiac conduction abnormalities are observed in rare instances
  and likely reflect the critical role of Cx43 in cardiac gap junctions.
📚

References & Deep Research

Deep Research

1
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Oculodentodigital Dysplasia (ODDD) — Comprehensive Disease Characteristics Report
Edison Scientific Literature 38 citations 2026-04-04T12:51:36.510634

Oculodentodigital Dysplasia (ODDD) — Comprehensive Disease Characteristics Report

Executive summary

Oculodentodigital dysplasia (ODDD) is a rare, predominantly autosomal dominant, pleiotropic developmental disorder characterized by a core triad of ocular, dental, and digital anomalies and caused most commonly by pathogenic variants in GJA1, encoding connexin 43 (Cx43), a gap-junction/hemichannel protein essential for intercellular communication. (hindu2023oculodentodigitaldysplasiaa pages 8-8, paznekas2003connexin43(gja1) pages 1-3)

A major 2009 genotype–phenotype synthesis of 54 genotyped families (177 affected individuals) quantified high but variable involvement of facial (92% of families), ocular (68%), dental (70%), and digital (80%) features and documented neurologic manifestations in ~30% of families. (paznekas2009gja1mutationsvariants pages 5-6)

Recent research has refined mechanistic understanding by solving a high-resolution cryo-EM structure of human Cx43 in a putative closed state (2023) and by describing additional CNS-heavy phenotypes including mosaic de novo GJA1 variants with delayed myelination and seizures (2024), emphasizing allelic and tissue-mosaic effects. (qi2023structureofthe pages 1-2, shimomura2024raremosaicvariant pages 1-2)

1. Disease information

1.1 Definition/overview

ODDD is a congenital/early-onset multisystem disorder involving craniofacial, ocular, dental, and limb development with variable neurologic involvement. A defining description in the recent dental literature is that: “ODDD is an autosomal dominant genetic disorder, which is characterized by abnormal ocular, dental, and digital findings. It is caused by a mutation in GJA1 gene encoding Cx43.” (BDJ Open, 2023) (hindu2023oculodentodigitaldysplasiaa pages 8-8).

A foundational genetics paper identified ODDD as a highly penetrant autosomal dominant disorder and reported the synonym “oculodentoosseous dysplasia”. (paznekas2003connexin43(gja1) pages 1-3)

1.2 Key identifiers (from retrieved evidence)

  • MONDO: MONDO_0008111 (Open Targets disease entry) (kumar2020oculodentodigitaldysplasiaa pages 1-2)
  • OMIM/MIM: 164200 (explicitly stated in multiple sources) (paznekas2003connexin43(gja1) pages 1-3, kumar2020oculodentodigitaldysplasiaa pages 1-2)
  • Orphanet / MeSH / ICD-10 / ICD-11: not found in the retrieved evidence corpus for this run (gap noted).

1.3 Synonyms/alternative names

  • Oculo-dento-digital dysplasia / oculodentodigital dysplasia / oculodentodigital syndrome (hindu2023oculodentodigitaldysplasiaa pages 8-8, kumar2020oculodentodigitaldysplasiaa pages 1-2)
  • Oculodentoosseous dysplasia (synonym stated in Paznekas 2003) (paznekas2003connexin43(gja1) pages 1-3)

1.4 Evidence source types in this report

  • Human clinical genetics / family studies and case series (paznekas2003connexin43(gja1) pages 1-3, paznekas2009gja1mutationsvariants pages 5-6, saintval2019gja1variantscause pages 2-4)
  • Systematic reviews of published cases (ocular-focused) (kumar2020oculodentodigitaldysplasiaa pages 2-3)
  • Dental case reports + systematic dental literature synthesis (hindu2023oculodentodigitaldysplasiaa pages 1-3)
  • Model organism (mouse) disease models (flenniken2005agja1missense pages 4-5, tong2009oogenesisdefectsin pages 1-2)
  • Structural biology and mechanistic reviews (qi2023structureofthe pages 1-2, leybaert2023connexinhemichannelsas pages 1-2)

2. Etiology

2.1 Primary causal factors

Genetic: Pathogenic variants in GJA1 (connexin 43) are the established primary cause of ODDD. In a 17-family cohort, investigators reported: “we found mutations in 100% of the individuals studied who were affected with ODDD.” (AJHG, 2003; DOI: https://doi.org/10.1086/346090) (paznekas2003connexin43(gja1) pages 3-4).

2.2 Risk factors

  • Genetic risk: carrying a pathogenic GJA1 variant (most often heterozygous, autosomal dominant). (paznekas2009gja1mutationsvariants pages 5-6, kumar2020oculodentodigitaldysplasiaa pages 1-2)
  • De novo variants: a substantial fraction of cases are sporadic; in the 54-family dataset, 39% were sporadic. (paznekas2009gja1mutationsvariants pages 5-6)

Environmental risk factors: not identified in retrieved evidence (ODDD is primarily Mendelian).

2.3 Protective factors

No protective genetic or environmental factors were identified in the retrieved evidence.

2.4 Gene–environment interactions

Not identified in retrieved evidence.

3. Phenotypes (clinical features)

ODDD shows high variability (variable expressivity; some features absent in subsets of families), but commonly involves multiple systems.

3.1 Core craniofacial/face phenotype

  • Characteristic ODDD facies reported in 92% of families in a 54-family series. (paznekas2009gja1mutationsvariants pages 5-6)
  • Examples include a thin/narrow nose with hypoplastic alae and prominent columella. (kumar2020oculodentodigitaldysplasiaa pages 1-2, paznekas2009gja1mutationsvariants pages 5-6)

Suggested HPO terms (non-exhaustive): - Narrow nose (HP:0003196) - Hypoplastic alae nasi (HP:0000430) - Prominent columella (HP:0009924)

3.2 Ocular phenotypes

Frequency/statistics: - In the 54-family synthesis: ocular (microphthalmia and/or microcornea) in 68% of families; among 177 individuals, microphthalmia 22% and microcornea 27%. (paznekas2009gja1mutationsvariants pages 5-6) - In an ocular-focused review of 295 reported cases: the most common eye findings across mutations were microcornea (n=111), microphthalmia (n=110), short palpebral fissures (n=56), and glaucoma (n=51). (Kumar 2020; published Apr 2020; DOI: https://doi.org/10.1155/2020/6535974) (kumar2020oculodentodigitaldysplasiaa pages 2-3)

Suggested HPO terms: - Microcornea (HP:0000482) - Microphthalmia (HP:0000568) - Short palpebral fissures (HP:0012745) - Glaucoma (HP:0000501)

QoL impact: glaucoma may cause severe visual impairment/blindness in a subset (glaucoma-related blindness noted in several individuals). (paznekas2009gja1mutationsvariants pages 5-6)

3.3 Dental/oral phenotypes

Frequency/statistics: - In the 54-family synthesis: dental anomalies present in 70% of families; among 177 individuals enamel hypoplasia 40% and microdontia 21%. (paznekas2009gja1mutationsvariants pages 5-6) - A 2023 dental systematic analysis summarized “common dental findings” including enamel hypoplasia/hypomineralization, microdontia, pulp stones, curved roots, and taurodontism and reports pooled frequencies from prior literature such as hypoplastic enamel ~40% and microdontia 21%. (Hindu & Umer 2023; BDJ Open; DOI: https://doi.org/10.1038/s41405-023-00139-7) (hindu2023oculodentodigitaldysplasiaa pages 1-3)

Suggested HPO terms: - Enamel hypoplasia (HP:0006297) - Microdontia (HP:0000691) - Hypodontia (HP:0000668) - Pulp stones (HP:0000706) (term availability may vary; include as dental pulp calcification) - Taurodontia (HP:0000679) - Dental caries (HP:0000670)

QoL impact: tooth pain, pulpitis, abscesses, and early tooth loss affect mastication and psychosocial well-being; dental care aims explicitly include maintaining function and esthetics. (hindu2023oculodentodigitaldysplasiaa pages 8-9)

3.4 Digital/limb phenotypes

Frequency/statistics: - In the 54-family synthesis: digital (syndactyly of 4th/5th fingers) present in 80% of families and 72% of 177 individuals, with 43% showing bilateral 4–5 syndactyly. (paznekas2009gja1mutationsvariants pages 5-6)

Suggested HPO terms: - 4-5 finger syndactyly (HP:0006101) - Syndactyly (HP:0001159) - Camptodactyly (HP:0012385) - Clinodactyly (HP:0030084)

3.5 Neurologic/CNS phenotypes

Neurologic manifestations are prominent in a subset and may emerge later (often adolescence/adulthood in spastic paraplegia presentations).

  • In the 54-family synthesis: neurologic manifestations present in ~30% of families, with urinary incontinence 12%, bowel incontinence 2%, and abnormal MRI findings 6% among 177 individuals. (paznekas2009gja1mutationsvariants pages 7-8, paznekas2009gja1mutationsvariants pages 5-6)
  • A neuroradiology series of 8 patients with GJA1 variants presenting with hereditary spastic paraplegia reported brain MRI findings consistent with hypomyelination and basal ganglia abnormalities; onset ranged from 14–50 years and disability stages ranged 1–6. (Saint-Val 2019; AJNR; DOI: https://doi.org/10.3174/ajnr.a6036) (saintval2019gja1variantscause pages 2-4)
  • A 2024 report highlights mosaic de novo GJA1 (p.P88L) with severe neurodevelopmental delay, seizures, and delayed myelination, and notes mosaicism may explain mild limb anomalies but severe CNS disease. (Shimomura 2024; Human Genome Variation; DOI: https://doi.org/10.1038/s41439-023-00262-9) (shimomura2024raremosaicvariant pages 1-2)

Suggested HPO terms: - Spastic paraplegia (HP:0001258) - Hyperreflexia (HP:0001347) - Seizures (HP:0001250) - Hypomyelination (HP:0003429) - Neurogenic bladder (HP:0000011)

4. Genetic / molecular information

4.1 Causal gene(s)

  • GJA1 (HGNC symbol: GJA1) encodes connexin 43 (Cx43), a gap junction/hemichannel protein central to ODDD pathogenesis. (hindu2023oculodentodigitaldysplasiaa pages 8-8, paznekas2003connexin43(gja1) pages 1-3)

4.2 Pathogenic variant spectrum (high-level)

  • In a major 2020 review of 295 cases, 73 distinct GJA1 mutations were reported across 165 molecularly confirmed individuals; the most frequent were p.R202H (11%), p.I130T (10%), p.A40V (10%). (kumar2020oculodentodigitaldysplasiaa pages 2-3)
  • The 2009 synthesis reported 48 different Cx43 mutations across 54 families. (paznekas2009gja1mutationsvariants pages 5-6)

Variant classes and functional consequences: - Missense variants dominate reported disease-causing changes; additional frameshift/truncating variants are rarer. (choi2018oculodentodigitaldysplasiawith pages 4-5) - Functional effects are heterogeneous and can include reduced junctional conductance, altered localization/trafficking, dominant-negative effects, and altered hemichannel vs gap junction behavior. (paznekas2009gja1mutationsvariants pages 7-8, flenniken2005agja1missense pages 9-10)

Somatic vs germline: - Most reported ODDD is germline heterozygous; mosaic pathogenic variants can cause atypical/severe neurodevelopmental phenotypes. (shimomura2024raremosaicvariant pages 1-2)

Population frequency: - A C-terminal variant A253V was noted as present at ~1–2% in Europeans in the 2009 discussion, illustrating that not all protein-altering variants are necessarily pathogenic. (paznekas2009gja1mutationsvariants pages 4-5)

4.3 Modifier genes / genetic modifiers

Direct modifier genes are not established in the retrieved evidence, but the 2009 synthesis emphasizes that variability may reflect regulatory/noncoding variation and modifier effects; it discusses SNPs and possible modifying alleles. (paznekas2009gja1mutationsvariants pages 7-8)

4.4 Epigenetics / chromosomal abnormalities

Not identified in retrieved evidence.

5. Environmental information

No specific environmental, lifestyle, or infectious contributors were identified in the retrieved evidence; ODDD is primarily a Mendelian disorder driven by GJA1 variants. (paznekas2003connexin43(gja1) pages 1-3, paznekas2009gja1mutationsvariants pages 5-6)

6. Mechanism / pathophysiology

6.1 Key concept definitions (current understanding)

  • Gap junction channel: intercellular channel formed by docking of two connexin hemichannels, enabling direct diffusion of ions and small metabolites.
  • Hemichannel: undocked connexin hexamer at the plasma membrane that can open under pathological conditions and allow solute exchange with extracellular space.

ODDD is best conceptualized as a Cx43 connexinopathy/channelopathy in which tissue-specific disruption of gap junctional intercellular communication (and/or aberrant hemichannel activity) perturbs development and maintenance of ocular structures, dentition, digits, and sometimes CNS myelin/basal ganglia integrity. (bock2013neurologicalmanifestationsof pages 1-2, flenniken2005agja1missense pages 9-10)

6.2 Causal chain (representative, multi-tissue)

  1. Trigger: germline (or mosaic) pathogenic variant in GJA1 → mutant Cx43 protein. (paznekas2003connexin43(gja1) pages 3-4, shimomura2024raremosaicvariant pages 1-2)
  2. Molecular dysfunction: altered Cx43 assembly/trafficking/docking and reduced or abnormal permeability of gap junction channels; some mutants act dominant-negative, reducing functional channel formation below haploinsufficiency expectations. (flenniken2005agja1missense pages 9-10, tong2009oogenesisdefectsin pages 1-2)
  3. Cellular consequence: impaired intercellular coupling and altered signaling homeostasis in critical developmental cell populations (e.g., craniofacial mesenchyme, odontogenic tissues, ocular anterior segment tissues; astrocyte networks and astrocyte–oligodendrocyte coupling in CNS). (bock2013neurologicalmanifestationsof pages 1-2, saintval2019gja1variantscause pages 2-4)
  4. Tissue/organ pathology: developmental anomalies (microcornea/microphthalmia; enamel hypoplasia; syndactyly) and in some individuals progressive neurologic involvement with spastic paraplegia and imaging patterns of hypomyelination and basal ganglia abnormalities. (paznekas2009gja1mutationsvariants pages 5-6, saintval2019gja1variantscause pages 2-4)

6.3 CNS-specific mechanistic interpretation

Cx43 is emphasized as an astrocytic gap junction protein involved in coordinated Ca2+ waves, K+ buffering, and glucose distribution; hemichannels can release signaling molecules and contribute to neuroglial inflammation. A mechanistic review frames ODDD neurologic disease as potentially arising from altered Cx43 gap junction/hemichannel function in glia, though links from specific channel defects to symptoms remain incompletely resolved. (bock2013neurologicalmanifestationsof pages 1-2)

6.4 Recent developments (2023–2024): structural and mechanistic advances

High-resolution Cx43 structure (2023): A major advance was the cryo-EM structure of human Cx43 gap junction channels at 2.26 Å, capturing a putative closed state, revealing lipid-like densities in the pore and a cytosolic gating conformation involving the N-terminal domain and TM2. (Qi et al., eLife, Aug 2023; DOI: https://doi.org/10.7554/elife.87616.3) (qi2023structureofthe pages 1-2, qi2023structureofthe pages 2-4)

This structural work explicitly maps ODDD-linked mutations and suggests lipid binding may influence gating: “binding of a lipid could directly influence the conformation of the gating elements of the protein (such as NTD)” and notes ODDD mutations in the extracellular domain. (qi2023structureofthe pages 9-11)

Therapeutic targeting concept (2023): In cardiovascular contexts, selective inhibition of Cx43 hemichannels without blocking gap junctions (e.g., Gap19 peptide) is discussed as enabling a “double-edged” approach: preventing pathological hemichannel opening while preserving gap junctional function—conceptually relevant for connexinopathies even though disease-specific evidence in ODDD remains limited. (Leybaert et al., JCI, Mar 2023; DOI: https://doi.org/10.1172/jci168117) (leybaert2023connexinhemichannelsas pages 1-2)

Phenotypic expansion / mosaicism (2024): Mosaic de novo GJA1 variants can yield disproportionate CNS involvement (seizures, delayed myelination) with only mild limb features, suggesting tissue mosaic ratios can shape phenotype severity. (shimomura2024raremosaicvariant pages 1-2)

6.5 Suggested ontology terms for mechanisms

GO Biological Process (suggestions): - Gap junction assembly (GO:1902723) - Cell–cell communication (GO:0007154) - Regulation of membrane permeability (GO:0043269) - Myelination (GO:0042552)

CL cell types (suggestions): - Astrocyte (CL:0000127) (supported mechanistically by astroglial Cx43 emphasis) (bock2013neurologicalmanifestationsof pages 1-2) - Oligodendrocyte (CL:0000128) (astrocyte–oligodendrocyte coupling implicated in hypomyelination) (saintval2019gja1variantscause pages 2-4) - Odontoblast (CL:0000031) / ameloblast (CL:0000138) (as relevant dental cell types; direct evidence not detailed in retrieved texts)

7. Anatomical structures affected

7.1 Organ level / systems

Primary systems repeatedly affected include: - Eye/anterior segment and globe development (microcornea, microphthalmia, glaucoma). (kumar2020oculodentodigitaldysplasiaa pages 2-3, paznekas2009gja1mutationsvariants pages 5-6) - Teeth and oral cavity (enamel hypoplasia, microdontia, caries, taurodontism). (hindu2023oculodentodigitaldysplasiaa pages 1-3) - Hands/feet digits (4–5 syndactyly). (paznekas2009gja1mutationsvariants pages 5-6) - CNS white matter and basal ganglia in neurologically affected patients (hypomyelination; calcifications). (saintval2019gja1variantscause pages 2-4, shimomura2024raremosaicvariant pages 1-2)

Suggested UBERON terms (examples): - Eye (UBERON:0000970) - Tooth (UBERON:0001091) - Hand (UBERON:0002389) / digit (UBERON:0002544) - Cerebral white matter (UBERON:0002312) - Basal ganglion (UBERON:0002435)

8. Temporal development

8.1 Onset

  • Many craniofacial/digital/dental anomalies are congenital or evident in childhood. (kumar2020oculodentodigitaldysplasiaa pages 1-2, paznekas2009gja1mutationsvariants pages 5-6)
  • Neurologic manifestations may present later; the 8-patient spastic paraplegia series reported onset from adolescence to adulthood (14–50 years). (saintval2019gja1variantscause pages 2-4)

8.2 Progression

  • Neurologic manifestations can be progressive, with variable disability and imaging patterns suggesting neurodegenerative involvement of myelin and basal ganglia. (saintval2019gja1variantscause pages 1-2, saintval2019gja1variantscause pages 2-4)

9. Inheritance and population

9.1 Inheritance

  • Predominantly autosomal dominant; both familial and de novo/sporadic cases are common; rare autosomal recessive families reported. (paznekas2009gja1mutationsvariants pages 5-6, kumar2020oculodentodigitaldysplasiaa pages 1-2)

9.2 Penetrance / expressivity

  • High penetrance is described in foundational reports, but with substantial intra- and interfamilial variability across organ systems. (paznekas2003connexin43(gja1) pages 1-3, park2017oculodentodigitaldysplasiapresenting pages 3-4)
  • In the 54-family dataset, 22% of families lacked ocular abnormalities and 15% lacked abnormal dentition, illustrating variable expressivity. (paznekas2009gja1mutationsvariants pages 5-6)

9.3 Epidemiology

  • A movement-disorders case review reports prevalence “less than 1/1,000,000.” (park2017oculodentodigitaldysplasiapresenting pages 3-4)
  • A 2020 ocular review identified 295 reported cases in 91 publications (1963–2019), consistent with extreme rarity and publication-based ascertainment. (kumar2020oculodentodigitaldysplasiaa pages 2-3)

10. Diagnostics

10.1 Clinical recognition

Diagnosis is typically suspected based on the combined ocular–dental–digital phenotype and characteristic facial features and/or neurologic features. (paznekas2009gja1mutationsvariants pages 5-6, kumar2020oculodentodigitaldysplasiaa pages 1-2)

10.2 Genetic testing (current real-world implementation)

  • Single-gene testing / targeted sequencing of GJA1 is a common confirmatory approach; an ocular case report used targeted sequencing of GJA1 plus array CGH to assess copy-number changes. (kumar2020oculodentodigitaldysplasiaa pages 1-2)
  • Targeted gene panels are useful when differential diagnoses are broad; authors emphasize that “targeted gene panel sequencing” can assist in differentiating ODDD from overlapping syndromes with similar craniofacial/dental features. (choi2018oculodentodigitaldysplasiawith pages 5-6)

10.3 Differential diagnosis

Differential diagnoses noted in the clinical genetics/dental literature include amelogenesis imperfecta, oral-facial-digital syndrome, Hallermann–Streiff syndrome, and Saethre–Chotzen syndrome; the presence of syndactyly and typical facial gestalt can support ODDD. (choi2018oculodentodigitaldysplasiawith pages 4-5, hindu2023oculodentodigitaldysplasiaa pages 8-8)

10.4 Biomarkers / imaging

No validated circulating biomarkers were identified in the retrieved evidence; imaging is relevant mainly for ocular evaluation (glaucoma/anterior segment) and for neurologic phenotypes where MRI can show hypomyelination and basal ganglia signal changes/calcifications. (saintval2019gja1variantscause pages 2-4, shimomura2024raremosaicvariant pages 1-2)

11. Outcome / prognosis

Evidence in the retrieved set suggests prognosis is dominated by: - Visual outcomes (risk of glaucoma and potential blindness in a minority) (paznekas2009gja1mutationsvariants pages 5-6) - Dental morbidity (caries, tooth wear, abscesses; need for lifelong preventive care) (hindu2023oculodentodigitaldysplasiaa pages 8-9) - Neurologic disability (variable severity; spastic paraplegia disability staging reported in neurologic series) (saintval2019gja1variantscause pages 2-4)

Quantitative survival/life expectancy data were not identified in the retrieved evidence.

12. Treatment

No disease-modifying pharmacotherapy is established for ODDD in the retrieved evidence; management is multidisciplinary and supportive.

12.1 Dental management (real-world implementation)

Dental care recommendations from a 2023 systematic analysis emphasize immediate treatment of active oral disease and longer-term prevention of tooth wear and maintenance of occlusion. (hindu2023oculodentodigitaldysplasiaa pages 1-3)

Specific interventions compiled from published cases include: - Sealants and early restoration of caries; avoidance of extractions when possible to preserve alveolar bone. (hindu2023oculodentodigitaldysplasiaa pages 8-9) - Endodontic treatments (pulpotomy/pulpectomy, root canal therapy, apexification) and full-coverage restorations where needed. (hindu2023oculodentodigitaldysplasiaa pages 7-8) - Regular surveillance every ~3 months in some reported dental protocols. (hindu2023oculodentodigitaldysplasiaa pages 7-8)

Suggested MAXO terms (examples): - Dental restoration procedure (MAXO:0000900) (term may vary) - Pit and fissure sealant application (MAXO:0000526) (term may vary) - Endodontic therapy (MAXO:0000104) (term may vary)

12.2 Ophthalmic care

Given high frequency of microcornea/microphthalmia and non-trivial glaucoma burden, ophthalmic monitoring and glaucoma management are key practical interventions (treatment details not elaborated in retrieved excerpts). (kumar2020oculodentodigitaldysplasiaa pages 2-3)

12.3 Neurologic symptomatic care

Neurologic manifestations (e.g., spasticity, seizures) are treated symptomatically in practice; disease-specific controlled evidence was not identified in the retrieved corpus. (shimomura2024raremosaicvariant pages 1-2)

12.4 Experimental / emerging approaches

Targeted modulation of Cx43 hemichannel activity (e.g., selective inhibitors that spare gap junctions) is an active area in other diseases and provides a mechanistic rationale for future connexin-based therapies, but ODDD-specific clinical trials were not identified in the clinical-trial search results for this run. (leybaert2023connexinhemichannelsas pages 1-2)

13. Prevention

Primary prevention is not applicable in the classic public-health sense for a Mendelian disorder; prevention focuses on reproductive and familial risk management.

  • Genetic counseling and cascade testing are strongly implied by the predominance of autosomal dominant inheritance and frequent de novo cases, but explicit guideline statements were not retrieved in this run. (paznekas2009gja1mutationsvariants pages 5-6)

14. Other species / natural disease

No naturally occurring (non-model) animal disease analogs were identified in the retrieved evidence.

15. Model organisms

15.1 Mouse models (key resources)

Multiple mouse models recapitulate core ODDD features and are widely used for mechanistic work: - Gja1Jrt/+ (Cx43 G60S) ENU-derived dominant model recapitulating syndactyly, enamel hypoplasia, craniofacial dysmorphology, ocular anomalies, and cardiac conduction abnormalities; evidence supports a dominant-negative mechanism and reduced Cx43 plaques/levels. (Flenniken 2005; Development; DOI: https://doi.org/10.1242/dev.02011) (flenniken2005agja1missense pages 4-5, flenniken2005agja1missense pages 9-10) - Knock-in models (I130T, G138R) recapitulate ODDD-like traits; reproductive and cardiac phenotypes and prenatal death effects are reported across strains. (tong2009oogenesisdefectsin pages 7-8) - Cx43 knockout (Gja1−/−) demonstrates severe developmental and reproductive defects, emphasizing the essential role of Cx43-mediated coupling. (tong2009oogenesisdefectsin pages 1-2)

15.2 Phenotype recapitulation and limitations

The Jrt/+ model reproduces many canonical traits but does not capture all variably penetrant human symptoms, highlighting allele- and tissue-specific differences. (flenniken2005agja1missense pages 10-11)

Key resource artifact

Disease name Abbreviation MONDO ID OMIM/MIM Common synonyms Causal gene Inheritance Key references (year; DOI/URL) Evidence
Oculodentodigital dysplasia ODDD MONDO_0008111 OMIM/MIM #164200 oculo-dento-digital dysplasia; oculo-dento-digital syndrome; oculodentoosseous dysplasia GJA1 (connexin 43, Cx43) Mostly autosomal dominant; rare autosomal recessive cases reported Paznekas et al., 2003; https://doi.org/10.1086/346090 • Paznekas et al., 2009; https://doi.org/10.1002/humu.20958 • Kumar et al., 2020; https://doi.org/10.1155/2020/6535974 • Hindu & Umer, 2023; https://doi.org/10.1038/s41405-023-00139-7 (paznekas2003connexin43(gja1) pages 1-3, paznekas2009gja1mutationsvariants pages 5-6, kumar2020oculodentodigitaldysplasiaa pages 1-2, hindu2023oculodentodigitaldysplasiaa pages 8-8)
Standard ontology/classification note — MONDO_0008111 #164200 not found in retrieved sources beyond above synonyms GJA1 Autosomal dominant form most frequently reported Open Targets disease-target association lists oculodentodigital dysplasia under MONDO_0008111 and associates GJA1 (kumar2020oculodentodigitaldysplasiaa pages 1-2)
Other identifiers — not found in retrieved sources not found beyond OMIM/MIM #164200 not found in retrieved sources not found beyond GJA1/Cx43 not found beyond AD/rare AR Orphanet, MeSH, ICD-10/ICD-11 were not explicitly retrieved in the gathered evidence (paznekas2003connexin43(gja1) pages 1-3, kumar2020oculodentodigitaldysplasiaa pages 1-2, hindu2023oculodentodigitaldysplasiaa pages 8-8)

Table: This table summarizes the core disease naming and identifier information retrieved for oculodentodigital dysplasia, including supported ontology IDs, synonyms, causal gene, inheritance, and anchor references. It is useful as a compact normalization artifact for a disease knowledge base entry.

Notes on evidence gaps (important for knowledge-base curation)

  • Orphanet ID, MeSH ID, ICD-10/ICD-11 codes were not present in the retrieved evidence for this run and should be added from OMIM/Orphanet/MeSH lookups in a subsequent curation step.
  • Quantitative survival/life expectancy and formal clinical diagnostic criteria/guidelines were not retrieved.
  • ODDD-specific clinical trials and disease-modifying therapies were not identified in the clinical trial search results for this run.

References

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  2. (paznekas2003connexin43(gja1) pages 1-3): William A. Paznekas, Simeon A. Boyadjiev, Robert E. Shapiro, Otto Daniels, Bernd Wollnik, Catherine E. Keegan, Jeffrey W. Innis, Mary Beth Dinulos, Cathy Christian, Mark C. Hannibal, and Ethylin Wang Jabs. Connexin 43 (gja1) mutations cause the pleiotropic phenotype of oculodentodigital dysplasia. American journal of human genetics, 72 2:408-18, Feb 2003. URL: https://doi.org/10.1086/346090, doi:10.1086/346090. This article has 756 citations and is from a highest quality peer-reviewed journal.

  3. (paznekas2009gja1mutationsvariants pages 5-6): William A. Paznekas, Barbara Karczeski, Sascha Vermeer, R. Brian Lowry, Martin Delatycki, Faivre Laurence, Pasi A. Koivisto, Lionel Van Maldergem, Simeon A. Boyadjiev, Joann N. Bodurtha, and Ethylin Wang Jabs. Gja1 mutations, variants, and connexin 43 dysfunction as it relates to the oculodentodigital dysplasia phenotype. Human Mutation, 30:724-733, May 2009. URL: https://doi.org/10.1002/humu.20958, doi:10.1002/humu.20958. This article has 312 citations and is from a domain leading peer-reviewed journal.

  4. (qi2023structureofthe pages 1-2): Chao Qi, Silvia Acosta Gutierrez, Pia Lavriha, Alaa Othman, Diego Lopez-Pigozzi, Erva Bayraktar, Dina Schuster, Paola Picotti, Nicola Zamboni, Mario Bortolozzi, Francesco Luigi Gervasio, and Volodymyr M Korkhov. Structure of the connexin-43 gap junction channel in a putative closed state. eLife, Aug 2023. URL: https://doi.org/10.7554/elife.87616.3, doi:10.7554/elife.87616.3. This article has 44 citations and is from a domain leading peer-reviewed journal.

  5. (shimomura2024raremosaicvariant pages 1-2): Rina Shimomura, Tomoe Yanagishita, Kumiko Ishiguro, Minobu Shichiji, Takatoshi Sato, Keiko Shimojima Yamamoto, Miho Nagata, Yasuki Ishihara, Yohei Miyashita, Keiko Ishigaki, Satoru Nagata, Yoshihiro Asano, and Toshiyuki Yamamoto. Rare mosaic variant of gja1 in a patient with a neurodevelopmental disorder. Human Genome Variation, Jan 2024. URL: https://doi.org/10.1038/s41439-023-00262-9, doi:10.1038/s41439-023-00262-9. This article has 3 citations.

  6. (kumar2020oculodentodigitaldysplasiaa pages 1-2): Virang Kumar, Natario L. Couser, and Arti Pandya. Oculodentodigital dysplasia: a case report and major review of the eye and ocular adnexa features of 295 reported cases. Case Reports in Ophthalmological Medicine, 2020:1-16, Apr 2020. URL: https://doi.org/10.1155/2020/6535974, doi:10.1155/2020/6535974. This article has 12 citations.

  7. (saintval2019gja1variantscause pages 2-4): L. Saint-Val, T. Courtin, P. Charles, C. Verny, M. Catala, R. Schiffmann, O. Boespflug-Tanguy, and F. Mochel. Gja1 variants cause spastic paraplegia associated with cerebral hypomyelination. American Journal of Neuroradiology, 40:788-791, Apr 2019. URL: https://doi.org/10.3174/ajnr.a6036, doi:10.3174/ajnr.a6036. This article has 8 citations and is from a peer-reviewed journal.

  8. (kumar2020oculodentodigitaldysplasiaa pages 2-3): Virang Kumar, Natario L. Couser, and Arti Pandya. Oculodentodigital dysplasia: a case report and major review of the eye and ocular adnexa features of 295 reported cases. Case Reports in Ophthalmological Medicine, 2020:1-16, Apr 2020. URL: https://doi.org/10.1155/2020/6535974, doi:10.1155/2020/6535974. This article has 12 citations.

  9. (hindu2023oculodentodigitaldysplasiaa pages 1-3): Karshma Devi Hindu and Fahad Umer. Oculo-dento-digital dysplasia: a systematic analysis of published dental literature. BDJ Open, Mar 2023. URL: https://doi.org/10.1038/s41405-023-00139-7, doi:10.1038/s41405-023-00139-7. This article has 3 citations and is from a peer-reviewed journal.

  10. (flenniken2005agja1missense pages 4-5): Ann M. Flenniken, Lucy R. Osborne, Nicole Anderson, Nadia Ciliberti, Craig Fleming, Joanne E. I. Gittens, Xiang-Qun Gong, Lois B. Kelsey, Crystal Lounsbury, Luisa Moreno, Brian J. Nieman, Katie Peterson, Dawei Qu, Wendi Roscoe, Qing Shao, Dan Tong, Gregory I. L. Veitch, Irina Voronina, Igor Vukobradovic, Geoffrey A. Wood, Yonghong Zhu, Ralph A. Zirngibl, Jane E. Aubin, Donglin Bai, Benoit G. Bruneau, Marc Grynpas, Janet E. Henderson, R. Mark Henkelman, Colin McKerlie, John G. Sled, William L. Stanford, Dale W. Laird, Gerald M. Kidder, S. Lee Adamson, and Janet Rossant. A gja1 missense mutation in a mouse model of oculodentodigital dysplasia. Development, 132:4375-4386, Oct 2005. URL: https://doi.org/10.1242/dev.02011, doi:10.1242/dev.02011. This article has 275 citations and is from a domain leading peer-reviewed journal.

  11. (tong2009oogenesisdefectsin pages 1-2): Dan Tong, Deanne Colley, Renee Thoo, Tony Y. Li, Isabelle Plante, Dale W. Laird, Donglin Bai, and Gerald M. Kidder. Oogenesis defects in a mutant mouse model of oculodentodigital dysplasia. Disease Models & Mechanisms, 2:157-167, Mar 2009. URL: https://doi.org/10.1242/dmm.000935, doi:10.1242/dmm.000935. This article has 22 citations and is from a domain leading peer-reviewed journal.

  12. (leybaert2023connexinhemichannelsas pages 1-2): Luc Leybaert, Maarten A.J. De Smet, Alessio Lissoni, Rosalie Allewaert, H. Llewelyn Roderick, Geert Bultynck, Mario Delmar, Karin R. Sipido, and Katja Witschas. Connexin hemichannels as candidate targets for cardioprotective and anti-arrhythmic treatments. The Journal of Clinical Investigation, Mar 2023. URL: https://doi.org/10.1172/jci168117, doi:10.1172/jci168117. This article has 54 citations.

  13. (paznekas2003connexin43(gja1) pages 3-4): William A. Paznekas, Simeon A. Boyadjiev, Robert E. Shapiro, Otto Daniels, Bernd Wollnik, Catherine E. Keegan, Jeffrey W. Innis, Mary Beth Dinulos, Cathy Christian, Mark C. Hannibal, and Ethylin Wang Jabs. Connexin 43 (gja1) mutations cause the pleiotropic phenotype of oculodentodigital dysplasia. American journal of human genetics, 72 2:408-18, Feb 2003. URL: https://doi.org/10.1086/346090, doi:10.1086/346090. This article has 756 citations and is from a highest quality peer-reviewed journal.

  14. (hindu2023oculodentodigitaldysplasiaa pages 8-9): Karshma Devi Hindu and Fahad Umer. Oculo-dento-digital dysplasia: a systematic analysis of published dental literature. BDJ Open, Mar 2023. URL: https://doi.org/10.1038/s41405-023-00139-7, doi:10.1038/s41405-023-00139-7. This article has 3 citations and is from a peer-reviewed journal.

  15. (paznekas2009gja1mutationsvariants pages 7-8): William A. Paznekas, Barbara Karczeski, Sascha Vermeer, R. Brian Lowry, Martin Delatycki, Faivre Laurence, Pasi A. Koivisto, Lionel Van Maldergem, Simeon A. Boyadjiev, Joann N. Bodurtha, and Ethylin Wang Jabs. Gja1 mutations, variants, and connexin 43 dysfunction as it relates to the oculodentodigital dysplasia phenotype. Human Mutation, 30:724-733, May 2009. URL: https://doi.org/10.1002/humu.20958, doi:10.1002/humu.20958. This article has 312 citations and is from a domain leading peer-reviewed journal.

  16. (choi2018oculodentodigitaldysplasiawith pages 4-5): J Choi, AramYang, A Song, M Lim, and J Kim. Oculodentodigital dysplasia with a novel mutation in gja1 diagnosed by targeted gene panel sequencing: a case report and literature review. Unknown journal, 2018.

  17. (flenniken2005agja1missense pages 9-10): Ann M. Flenniken, Lucy R. Osborne, Nicole Anderson, Nadia Ciliberti, Craig Fleming, Joanne E. I. Gittens, Xiang-Qun Gong, Lois B. Kelsey, Crystal Lounsbury, Luisa Moreno, Brian J. Nieman, Katie Peterson, Dawei Qu, Wendi Roscoe, Qing Shao, Dan Tong, Gregory I. L. Veitch, Irina Voronina, Igor Vukobradovic, Geoffrey A. Wood, Yonghong Zhu, Ralph A. Zirngibl, Jane E. Aubin, Donglin Bai, Benoit G. Bruneau, Marc Grynpas, Janet E. Henderson, R. Mark Henkelman, Colin McKerlie, John G. Sled, William L. Stanford, Dale W. Laird, Gerald M. Kidder, S. Lee Adamson, and Janet Rossant. A gja1 missense mutation in a mouse model of oculodentodigital dysplasia. Development, 132:4375-4386, Oct 2005. URL: https://doi.org/10.1242/dev.02011, doi:10.1242/dev.02011. This article has 275 citations and is from a domain leading peer-reviewed journal.

  18. (paznekas2009gja1mutationsvariants pages 4-5): William A. Paznekas, Barbara Karczeski, Sascha Vermeer, R. Brian Lowry, Martin Delatycki, Faivre Laurence, Pasi A. Koivisto, Lionel Van Maldergem, Simeon A. Boyadjiev, Joann N. Bodurtha, and Ethylin Wang Jabs. Gja1 mutations, variants, and connexin 43 dysfunction as it relates to the oculodentodigital dysplasia phenotype. Human Mutation, 30:724-733, May 2009. URL: https://doi.org/10.1002/humu.20958, doi:10.1002/humu.20958. This article has 312 citations and is from a domain leading peer-reviewed journal.

  19. (bock2013neurologicalmanifestationsof pages 1-2): Marijke De Bock, Marianne Kerrebrouck, Nan Wang, and Luc Leybaert. Neurological manifestations of oculodentodigital dysplasia: a cx43 channelopathy of the central nervous system? Frontiers in Pharmacology, Jun 2013. URL: https://doi.org/10.3389/fphar.2013.00120, doi:10.3389/fphar.2013.00120. This article has 76 citations.

  20. (qi2023structureofthe pages 2-4): Chao Qi, Silvia Acosta Gutierrez, Pia Lavriha, Alaa Othman, Diego Lopez-Pigozzi, Erva Bayraktar, Dina Schuster, Paola Picotti, Nicola Zamboni, Mario Bortolozzi, Francesco Luigi Gervasio, and Volodymyr M Korkhov. Structure of the connexin-43 gap junction channel in a putative closed state. eLife, Aug 2023. URL: https://doi.org/10.7554/elife.87616.3, doi:10.7554/elife.87616.3. This article has 44 citations and is from a domain leading peer-reviewed journal.

  21. (qi2023structureofthe pages 9-11): Chao Qi, Silvia Acosta Gutierrez, Pia Lavriha, Alaa Othman, Diego Lopez-Pigozzi, Erva Bayraktar, Dina Schuster, Paola Picotti, Nicola Zamboni, Mario Bortolozzi, Francesco Luigi Gervasio, and Volodymyr M Korkhov. Structure of the connexin-43 gap junction channel in a putative closed state. eLife, Aug 2023. URL: https://doi.org/10.7554/elife.87616.3, doi:10.7554/elife.87616.3. This article has 44 citations and is from a domain leading peer-reviewed journal.

  22. (saintval2019gja1variantscause pages 1-2): L. Saint-Val, T. Courtin, P. Charles, C. Verny, M. Catala, R. Schiffmann, O. Boespflug-Tanguy, and F. Mochel. Gja1 variants cause spastic paraplegia associated with cerebral hypomyelination. American Journal of Neuroradiology, 40:788-791, Apr 2019. URL: https://doi.org/10.3174/ajnr.a6036, doi:10.3174/ajnr.a6036. This article has 8 citations and is from a peer-reviewed journal.

  23. (park2017oculodentodigitaldysplasiapresenting pages 3-4): Kye Won Park, Ho-Sung Ryu, Juyeon Kim, and Sun Ju Chung. Oculodentodigital dysplasia presenting as spastic paraparesis: the first genetically confirmed korean case and a literature review. Journal of Movement Disorders, 10:149-153, Sep 2017. URL: https://doi.org/10.14802/jmd.17050, doi:10.14802/jmd.17050. This article has 10 citations and is from a peer-reviewed journal.

  24. (choi2018oculodentodigitaldysplasiawith pages 5-6): J Choi, AramYang, A Song, M Lim, and J Kim. Oculodentodigital dysplasia with a novel mutation in gja1 diagnosed by targeted gene panel sequencing: a case report and literature review. Unknown journal, 2018.

  25. (hindu2023oculodentodigitaldysplasiaa pages 7-8): Karshma Devi Hindu and Fahad Umer. Oculo-dento-digital dysplasia: a systematic analysis of published dental literature. BDJ Open, Mar 2023. URL: https://doi.org/10.1038/s41405-023-00139-7, doi:10.1038/s41405-023-00139-7. This article has 3 citations and is from a peer-reviewed journal.

  26. (tong2009oogenesisdefectsin pages 7-8): Dan Tong, Deanne Colley, Renee Thoo, Tony Y. Li, Isabelle Plante, Dale W. Laird, Donglin Bai, and Gerald M. Kidder. Oogenesis defects in a mutant mouse model of oculodentodigital dysplasia. Disease Models & Mechanisms, 2:157-167, Mar 2009. URL: https://doi.org/10.1242/dmm.000935, doi:10.1242/dmm.000935. This article has 22 citations and is from a domain leading peer-reviewed journal.

  27. (flenniken2005agja1missense pages 10-11): Ann M. Flenniken, Lucy R. Osborne, Nicole Anderson, Nadia Ciliberti, Craig Fleming, Joanne E. I. Gittens, Xiang-Qun Gong, Lois B. Kelsey, Crystal Lounsbury, Luisa Moreno, Brian J. Nieman, Katie Peterson, Dawei Qu, Wendi Roscoe, Qing Shao, Dan Tong, Gregory I. L. Veitch, Irina Voronina, Igor Vukobradovic, Geoffrey A. Wood, Yonghong Zhu, Ralph A. Zirngibl, Jane E. Aubin, Donglin Bai, Benoit G. Bruneau, Marc Grynpas, Janet E. Henderson, R. Mark Henkelman, Colin McKerlie, John G. Sled, William L. Stanford, Dale W. Laird, Gerald M. Kidder, S. Lee Adamson, and Janet Rossant. A gja1 missense mutation in a mouse model of oculodentodigital dysplasia. Development, 132:4375-4386, Oct 2005. URL: https://doi.org/10.1242/dev.02011, doi:10.1242/dev.02011. This article has 275 citations and is from a domain leading peer-reviewed journal.