Adult-Onset Autosomal Dominant Demyelinating Leukodystrophy

Neurodegenerative Disease MONDO:0008215 Pathograph 9 Neurodegenerative Disease

Adult-onset autosomal dominant demyelinating leukodystrophy is a rare, slowly progressive neurodegenerative leukodystrophy characterized by central nervous system demyelination with autonomic dysfunction, pyramidal signs, ataxia, and variable cognitive impairment.

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5
Pathophys.
10
Phenotypes
9
Pathograph
1
Genes
3
Treatments
2
Subtypes
1
Trials
8
References
1
Deep Research
◆

Subtypes

2
LMNB1 Duplication-Related ADLD
The classic molecular subtype caused by heterozygous LMNB1 duplication, producing lamin B1 overexpression and the typical autonomic, pyramidal, ataxic, and leukodystrophy phenotype.
Show evidence (1 reference)
DOI:10.1007/s44162-024-00055-w SUPPORT Human Clinical
"All eight patients had LMNB1 duplication."
Supports LMNB1 duplication as the molecular finding across the Mayo Clinic ADLD cohort.
Upstream Deletion-Related ADLD
A regulatory structural-variant subtype in which heterozygous upstream deletion removes a topological boundary and drives LMNB1 enhancer adoption without whole-gene duplication.
Show evidence (1 reference)
PMID:25701871 SUPPORT Human Clinical
"This second route to LMNB1 overexpression and ADLD is a new example of the relevance of regulatory landscape modifications in determining Mendelian phenotypes."
Supports upstream regulatory deletion and enhancer adoption as a distinct molecular route to ADLD.
⚙

Pathophysiology

5
LMNB1 Overexpression
Whole-gene duplication or upstream regulatory deletion increases LMNB1 expression, establishing lamin B1 excess as the proximal molecular driver.
Downstream
Nuclear Lamina Structural Dysregulation Lamin B1 excess perturbs nuclear-lamina and chromatin-associated functions in CNS cells.
Show evidence (2 references)
PMID:28769756 SUPPORT Human Clinical
"Duplication or over expression of the lamin B1 (LMNB1) gene causes ADLD."
The family study directly links LMNB1 duplication/overexpression with adult-onset autosomal dominant leukodystrophy.
PMID:25701871 SUPPORT Human Clinical
"Chromosomal rearrangements with duplication of the lamin B1 (LMNB1) gene underlie autosomal dominant adult-onset demyelinating leukodystrophy (ADLD), a rare neurological disorder in which overexpression of LMNB1 causes progressive central nervous system demyelination."
The structural-variant study supports LMNB1 overexpression as the shared mechanism driving progressive CNS demyelination.
Enhancer Adoption From Upstream Deletion
Some families lack an LMNB1 coding duplication and instead have upstream deletions that disrupt regulatory boundaries, allowing ectopic enhancer activity to increase LMNB1 expression.
Downstream
LMNB1 Overexpression Enhancer adoption increases LMNB1 promoter activity and converges on lamin B1 overexpression.
Show evidence (1 reference)
PMID:25701871 SUPPORT Human Clinical
"The deletion eliminates a genome topological domain boundary, allowing normally forbidden interactions between at least three forebrain-directed enhancers and the LMNB1 promoter, in line with the observed mainly cerebral localization of lamin B1 overexpression and myelin degeneration."
This supports a noncoding structural variant mechanism that converges on LMNB1 overexpression.
Nuclear Lamina Structural Dysregulation
Lamin B1 overexpression perturbs nuclear lamina structure and chromatin regulatory functions, providing a cellular bridge from structural variants to altered CNS cell morphology and function.
oligodendrocyte link
chromatin organization link ⚠ ABNORMAL
Downstream
Oligodendrocyte Myelin Dysfunction Nuclear and gene-regulatory disruption in disease-relevant CNS cells contributes to impaired myelin maintenance.
Show evidence (2 references)
PMID:37450245 SUPPORT Other
"LMNB1 encodes for Lamin B1, a protein of the nuclear lamina. Lamin B1 regulates many cellular processes such as DNA replication, chromatin organization, and senescence."
Supports nuclear-lamina and chromatin organization disruption as a proximal molecular consequence of LMNB1 overexpression.
PMID:37450245 SUPPORT Other
"Nevertheless, Lamin B1 together with the other lamins that constitute the nuclear lamina has firstly the key role of maintaining the nuclear structure."
Supports nuclear structural homeostasis as a relevant lamin B1-dependent process.
Oligodendrocyte Myelin Dysfunction
Disease-relevant LMNB1-overexpressing models implicate oligodendrocytes and CNS myelin maintenance as vulnerable downstream targets of lamin B1 excess.
oligodendrocyte link
myelination link ↓ DECREASED
Downstream
Central Nervous System Demyelination Oligodendrocyte and myelin dysfunction manifests as progressive CNS demyelination.
Show evidence (2 references)
PMID:31143934 SUPPORT In Vitro
"studied autosomal dominant adult-onset demyelinating leukodystrophy (ADLD) due to lamin B1 (LMNB1) duplication, a hereditary, progressive and fatal disorder affecting myelin in the CNS."
Supports CNS myelin as the affected tissue-level target of LMNB1-duplication ADLD.
PMID:31143934 SUPPORT In Vitro
"in two disease-relevant cellular models: murine oligodendrocytes overexpressing human LMNB1, and neurons directly reprogrammed from patients' fibroblasts."
Supports oligodendrocytes as a disease-relevant cellular model for LMNB1 overexpression.
Central Nervous System Demyelination
Progressive central nervous system demyelination and white matter loss are the downstream tissue-level outputs of LMNB1 overexpression.
myelination link ↓ DECREASED
Show evidence (2 references)
PMID:25701871 SUPPORT Human Clinical
"overexpression of LMNB1 causes progressive central nervous system demyelination."
Directly links LMNB1 overexpression to progressive CNS demyelination.
PMID:28769756 SUPPORT Human Clinical
"Autosomal dominant adult-onset demyelinating leukodystrophy (ADLD) is a very rare neurological disorder featured with late onset, slowly progressive central nervous system demyelination."
Supports slowly progressive CNS demyelination as the defining downstream phenotype.
⬡

Pathograph

Use the checkboxes to hide or show graph categories. Hover nodes for evidence and cross-linked metadata.
Pathograph: causal mechanism network for Adult-Onset Autosomal Dominant Demyelinating Leukodystrophy 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

10
Musculoskeletal 1
Spasticity Spasticity (HP:0001257)
Show evidence (1 reference)
PMID:26053668 SUPPORT Human Clinical
"Motor signs developed ascending from spastic paraplegia to tetraplegia and pseudobulbar palsy in the seventh decade."
The longitudinal cohort supports spastic motor involvement during progression.
Nervous System 8
Leukodystrophy Leukodystrophy (HP:0002415)
Show evidence (1 reference)
PMID:28769756 SUPPORT Human Clinical
"Autosomal dominant adult-onset demyelinating leukodystrophy (ADLD) is a very rare neurological disorder featured with late onset, slowly progressive central nervous system demyelination."
This describes the defining adult-onset leukodystrophy phenotype and progressive CNS demyelination.
Ataxia Ataxia (HP:0001251)
Show evidence (1 reference)
PMID:26053668 SUPPORT Human Clinical
"Duplication of the LMNB1 gene encoding lamin B1 causes adult-onset autosomal-dominant leukodystrophy (ADLD) starting with autonomic symptoms, which are followed by pyramidal signs and ataxia."
The longitudinal study identifies ataxia as a later motor feature after autonomic symptoms.
Autonomic Dysfunction Abnormal autonomic nervous system physiology (HP:0012332)
Show evidence (1 reference)
PMID:26053668 SUPPORT Human Clinical
"Autonomic dysfunction appeared in the fifth to sixth decade, preceding or together with gait and coordination difficulties."
The longitudinal cohort supports autonomic dysfunction as an early clinical feature.
Cognitive Impairment VERY_FREQUENT Cognitive impairment (HP:0100543)
Show evidence (1 reference)
DOI:10.1007/s44162-024-00055-w SUPPORT Human Clinical
"Other reported symptoms included cognitive difficulties (8/8), fatigue (7/8), sleep issues (4/8), mood disturbances (5/8), tremor (4/8), and migraine (4/8)."
Supports cognitive impairment as very frequent in the eight-patient Mayo Clinic cohort.
Sleep Disturbance FREQUENT Sleep disturbance (HP:0002360)
Show evidence (1 reference)
DOI:10.1007/s44162-024-00055-w SUPPORT Human Clinical
"Other reported symptoms included cognitive difficulties (8/8), fatigue (7/8), sleep issues (4/8), mood disturbances (5/8), tremor (4/8), and migraine (4/8)."
Supports sleep disturbance in half of the eight-patient Mayo Clinic cohort.
Mood Disturbance FREQUENT Depression (HP:0000716)
Show evidence (1 reference)
DOI:10.1007/s44162-024-00055-w PARTIAL Human Clinical
"Other reported symptoms included cognitive difficulties (8/8), fatigue (7/8), sleep issues (4/8), mood disturbances (5/8), tremor (4/8), and migraine (4/8)."
The cohort reports mood disturbances in most patients; the HPO binding is to the available depression term and is therefore partial.
Tremor FREQUENT Tremor (HP:0001337)
Show evidence (1 reference)
DOI:10.1007/s44162-024-00055-w SUPPORT Human Clinical
"Other reported symptoms included cognitive difficulties (8/8), fatigue (7/8), sleep issues (4/8), mood disturbances (5/8), tremor (4/8), and migraine (4/8)."
Supports tremor in half of the eight-patient Mayo Clinic cohort.
Migraine FREQUENT Migraine (HP:0002076)
Show evidence (1 reference)
DOI:10.1007/s44162-024-00055-w SUPPORT Human Clinical
"Other reported symptoms included cognitive difficulties (8/8), fatigue (7/8), sleep issues (4/8), mood disturbances (5/8), tremor (4/8), and migraine (4/8)."
Supports migraine in half of the eight-patient Mayo Clinic cohort.
Constitutional 1
Fatigue VERY_FREQUENT Fatigue (HP:0012378)
Show evidence (1 reference)
DOI:10.1007/s44162-024-00055-w SUPPORT Human Clinical
"Other reported symptoms included cognitive difficulties (8/8), fatigue (7/8), sleep issues (4/8), mood disturbances (5/8), tremor (4/8), and migraine (4/8)."
Supports fatigue as frequent in the eight-patient Mayo Clinic cohort.
🧬

Genetic Associations

1
LMNB1 (Causative)
Autosomal dominant inheritance
Show evidence (2 references)
PMID:28769756 SUPPORT Human Clinical
"However, Multiplex ligand-dependent probe amplification (MLPA) showed whole duplication of LMNB1 gene which is co-segregated with the disease phenotype in this family."
The family study supports LMNB1 duplication as a causative structural variant.
PMID:40046440 SUPPORT Human Clinical
"Currently, two genetic alterations have been identified in association with the pathogenesis of ADLD: LMNB1 gene tandem duplication and LMNB1 gene upstream deletions."
Supports the two major LMNB1 gain-of-expression structural variant classes represented in this entry.
💊

Treatments

3
Symptom-Directed Supportive Care
Action: supportive care MAXO:0000950
Management is supportive and symptom-directed, with attention to autonomic dysfunction, spasticity, mobility decline, fatigue, and cognitive or mood symptoms while disease-targeted therapy remains investigational.
Target Phenotypes: Autonomic dysfunction ↗ Spasticity ↗ Fatigue ↗
Show evidence (2 references)
DOI:10.1007/s44162-024-00055-w PARTIAL Human Clinical
"Other reported symptoms included cognitive difficulties (8/8), fatigue (7/8), sleep issues (4/8), mood disturbances (5/8), tremor (4/8), and migraine (4/8)."
Supports the clinical symptom targets for supportive management in the Mayo Clinic cohort.
PMID:37564735 PARTIAL Other
"Comprehensive evaluation and molecular confirmation when available helps in prognostication, early initiation of treatment in certain disorders, enrollment in clinical trials, and provides valuable information for the family for reproductive counseling."
Supports anticipatory management, treatment consideration when available, trial enrollment, and family counseling in adult-onset leukodystrophy care.
Genetic Counseling
Action: genetic counseling MAXO:0000079
Genetic counseling is appropriate after molecular confirmation because the disease is autosomal dominant and familial risk and reproductive decisions are central to care.
Show evidence (1 reference)
PMID:37564735 SUPPORT Other
"Comprehensive evaluation and molecular confirmation when available helps in prognostication, early initiation of treatment in certain disorders, enrollment in clinical trials, and provides valuable information for the family for reproductive counseling."
Supports genetic and reproductive counseling after molecular diagnosis in adult-onset leukodystrophies.
Allele-Specific RNA Interference
Action: RNA interference therapy MAXO:0001592
LMNB1-lowering RNA interference is a preclinical disease-targeted strategy intended to reduce excess LMNB1 expression while avoiding excessive suppression of the normal allele.
Show evidence (1 reference)
PMID:31143934 PARTIAL In Vitro
"Three of the small interfering RNAs were highly selective for the target allele and restored both LMNB1 mRNA and protein levels close to control levels."
This supports a mechanistically targeted but preclinical RNAi approach in patient-derived and disease-relevant cellular models.
🔬

Clinical Trials

1
NCT06816498 PHASE_I ACTIVE_NOT_RECRUITING
Open-label single-participant phase 1/2 personalized antisense oligonucleotide study for LMNB1 mutation-associated ADLD.
Target Phenotypes: Leukodystrophy ↗
Show evidence (1 reference)
clinicaltrials:NCT06816498 SUPPORT Human Clinical
"This research project entails delivery of a personalized antisense oligonucleotide (ASO) drug designed for a single participant with Autosomal Dominant Leukodystrophy (ADLD) due to LMNB1 mutation"
Supports an active personalized ASO clinical trial for LMNB1-associated ADLD.
{ }

Source YAML

click to show 
name: Adult-Onset Autosomal Dominant Demyelinating Leukodystrophy
creation_date: "2026-05-06T03:14:37Z"
updated_date: "2026-05-06T03:14:37Z"
category: Neurodegenerative Disease
parents:
- Neurodegenerative Disease
disease_term:
  preferred_term: adult-onset autosomal dominant demyelinating leukodystrophy
  term:
    id: MONDO:0008215
    label: adult-onset autosomal dominant demyelinating leukodystrophy
description: >-
  Adult-onset autosomal dominant demyelinating leukodystrophy is a rare,
  slowly progressive neurodegenerative leukodystrophy characterized by central
  nervous system demyelination with autonomic dysfunction, pyramidal signs,
  ataxia, and variable cognitive impairment.
synonyms:
- LMNB1-related autosomal dominant leukodystrophy
- Autosomal dominant adult-onset demyelinating leukodystrophy
- ADLD
external_assertions:
- name: OMIM adult-onset autosomal dominant leukodystrophy record
  source: OMIM
  assertion_type: disease_record
  external_id: OMIM:169500
  description: OMIM disease identifier for adult-onset autosomal dominant leukodystrophy.
has_subtypes:
- name: LMNB1 Duplication-Related ADLD
  description: >-
    The classic molecular subtype caused by heterozygous LMNB1 duplication,
    producing lamin B1 overexpression and the typical autonomic, pyramidal,
    ataxic, and leukodystrophy phenotype.
  evidence:
  - reference: DOI:10.1007/s44162-024-00055-w
    reference_title: A retrospective review of LMNB1-related autosomal dominant leukodystrophy
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "All eight patients had LMNB1 duplication."
    explanation: Supports LMNB1 duplication as the molecular finding across the Mayo Clinic ADLD cohort.
- name: Upstream Deletion-Related ADLD
  description: >-
    A regulatory structural-variant subtype in which heterozygous upstream
    deletion removes a topological boundary and drives LMNB1 enhancer adoption
    without whole-gene duplication.
  evidence:
  - reference: PMID:25701871
    reference_title: "A large genomic deletion leads to enhancer adoption by the lamin B1 gene: a second path to autosomal dominant adult-onset demyelinating leukodystrophy (ADLD)."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "This second route to LMNB1 overexpression and ADLD is a new example of the relevance of regulatory landscape modifications in determining Mendelian phenotypes."
    explanation: Supports upstream regulatory deletion and enhancer adoption as a distinct molecular route to ADLD.
pathophysiology:
- name: LMNB1 Overexpression
  description: >-
    Whole-gene duplication or upstream regulatory deletion increases LMNB1
    expression, establishing lamin B1 excess as the proximal molecular driver.
  evidence:
  - reference: PMID:28769756
    reference_title: "An LMNB1 Duplication Caused Adult-Onset Autosomal Dominant Leukodystrophy in Chinese Family: Clinical Manifestations, Neuroradiology and Genetic Diagnosis."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Duplication or over expression of the lamin B1 (LMNB1) gene causes ADLD."
    explanation: >-
      The family study directly links LMNB1 duplication/overexpression with
      adult-onset autosomal dominant leukodystrophy.
  - reference: PMID:25701871
    reference_title: "A large genomic deletion leads to enhancer adoption by the lamin B1 gene: a second path to autosomal dominant adult-onset demyelinating leukodystrophy (ADLD)."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Chromosomal rearrangements with duplication of the lamin B1 (LMNB1) gene underlie autosomal dominant adult-onset demyelinating leukodystrophy (ADLD), a rare neurological disorder in which overexpression of LMNB1 causes progressive central nervous system demyelination."
    explanation: >-
      The structural-variant study supports LMNB1 overexpression as the shared
      mechanism driving progressive CNS demyelination.
  downstream:
  - target: Nuclear Lamina Structural Dysregulation
    description: Lamin B1 excess perturbs nuclear-lamina and chromatin-associated functions in CNS cells.
- name: Enhancer Adoption From Upstream Deletion
  description: >-
    Some families lack an LMNB1 coding duplication and instead have upstream
    deletions that disrupt regulatory boundaries, allowing ectopic enhancer
    activity to increase LMNB1 expression.
  evidence:
  - reference: PMID:25701871
    reference_title: "A large genomic deletion leads to enhancer adoption by the lamin B1 gene: a second path to autosomal dominant adult-onset demyelinating leukodystrophy (ADLD)."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "The deletion eliminates a genome topological domain boundary, allowing normally forbidden interactions between at least three forebrain-directed enhancers and the LMNB1 promoter, in line with the observed mainly cerebral localization of lamin B1 overexpression and myelin degeneration."
    explanation: >-
      This supports a noncoding structural variant mechanism that converges on
      LMNB1 overexpression.
  downstream:
  - target: LMNB1 Overexpression
    description: Enhancer adoption increases LMNB1 promoter activity and converges on lamin B1 overexpression.
- name: Nuclear Lamina Structural Dysregulation
  description: >-
    Lamin B1 overexpression perturbs nuclear lamina structure and chromatin
    regulatory functions, providing a cellular bridge from structural variants
    to altered CNS cell morphology and function.
  cell_types:
  - preferred_term: oligodendrocyte
    term:
      id: CL:0000128
      label: oligodendrocyte
  biological_processes:
  - preferred_term: chromatin organization
    term:
      id: GO:0006325
      label: chromatin organization
    modifier: ABNORMAL
  evidence:
  - reference: PMID:37450245
    reference_title: "Understanding the Ultra-Rare Disease Autosomal Dominant Leukodystrophy: an Updated Review on Morpho-Functional Alterations Found in Experimental Models."
    supports: SUPPORT
    evidence_source: OTHER
    snippet: "LMNB1 encodes for Lamin B1, a protein of the nuclear lamina. Lamin B1 regulates many cellular processes such as DNA replication, chromatin organization, and senescence."
    explanation: Supports nuclear-lamina and chromatin organization disruption as a proximal molecular consequence of LMNB1 overexpression.
  - reference: PMID:37450245
    reference_title: "Understanding the Ultra-Rare Disease Autosomal Dominant Leukodystrophy: an Updated Review on Morpho-Functional Alterations Found in Experimental Models."
    supports: SUPPORT
    evidence_source: OTHER
    snippet: "Nevertheless, Lamin B1 together with the other lamins that constitute the nuclear lamina has firstly the key role of maintaining the nuclear structure."
    explanation: Supports nuclear structural homeostasis as a relevant lamin B1-dependent process.
  downstream:
  - target: Oligodendrocyte Myelin Dysfunction
    description: Nuclear and gene-regulatory disruption in disease-relevant CNS cells contributes to impaired myelin maintenance.
- name: Oligodendrocyte Myelin Dysfunction
  description: >-
    Disease-relevant LMNB1-overexpressing models implicate oligodendrocytes and
    CNS myelin maintenance as vulnerable downstream targets of lamin B1 excess.
  cell_types:
  - preferred_term: oligodendrocyte
    term:
      id: CL:0000128
      label: oligodendrocyte
  biological_processes:
  - preferred_term: myelination
    term:
      id: GO:0042552
      label: myelination
    modifier: DECREASED
  evidence:
  - reference: PMID:31143934
    reference_title: "Allele-specific silencing as treatment for gene duplication disorders: proof-of-principle in autosomal dominant leukodystrophy."
    supports: SUPPORT
    evidence_source: IN_VITRO
    snippet: "studied autosomal dominant adult-onset demyelinating leukodystrophy (ADLD) due to lamin B1 (LMNB1) duplication, a hereditary, progressive and fatal disorder affecting myelin in the CNS."
    explanation: Supports CNS myelin as the affected tissue-level target of LMNB1-duplication ADLD.
  - reference: PMID:31143934
    reference_title: "Allele-specific silencing as treatment for gene duplication disorders: proof-of-principle in autosomal dominant leukodystrophy."
    supports: SUPPORT
    evidence_source: IN_VITRO
    snippet: "in two disease-relevant cellular models: murine oligodendrocytes overexpressing human LMNB1, and neurons directly reprogrammed from patients' fibroblasts."
    explanation: Supports oligodendrocytes as a disease-relevant cellular model for LMNB1 overexpression.
  downstream:
  - target: Central Nervous System Demyelination
    description: Oligodendrocyte and myelin dysfunction manifests as progressive CNS demyelination.
- name: Central Nervous System Demyelination
  description: >-
    Progressive central nervous system demyelination and white matter loss are
    the downstream tissue-level outputs of LMNB1 overexpression.
  biological_processes:
  - preferred_term: myelination
    term:
      id: GO:0042552
      label: myelination
    modifier: DECREASED
  evidence:
  - reference: PMID:25701871
    reference_title: "A large genomic deletion leads to enhancer adoption by the lamin B1 gene: a second path to autosomal dominant adult-onset demyelinating leukodystrophy (ADLD)."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "overexpression of LMNB1 causes progressive central nervous system demyelination."
    explanation: Directly links LMNB1 overexpression to progressive CNS demyelination.
  - reference: PMID:28769756
    reference_title: "An LMNB1 Duplication Caused Adult-Onset Autosomal Dominant Leukodystrophy in Chinese Family: Clinical Manifestations, Neuroradiology and Genetic Diagnosis."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Autosomal dominant adult-onset demyelinating leukodystrophy (ADLD) is a very rare neurological disorder featured with late onset, slowly progressive central nervous system demyelination."
    explanation: Supports slowly progressive CNS demyelination as the defining downstream phenotype.
phenotypes:
- name: Leukodystrophy
  category: Neurologic
  phenotype_term:
    preferred_term: Leukodystrophy
    term:
      id: HP:0002415
      label: Leukodystrophy
  description: >-
    Progressive central nervous system white matter disease is the core
    radiologic and clinical substrate.
  evidence:
  - reference: PMID:28769756
    reference_title: "An LMNB1 Duplication Caused Adult-Onset Autosomal Dominant Leukodystrophy in Chinese Family: Clinical Manifestations, Neuroradiology and Genetic Diagnosis."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Autosomal dominant adult-onset demyelinating leukodystrophy (ADLD) is a very rare neurological disorder featured with late onset, slowly progressive central nervous system demyelination."
    explanation: >-
      This describes the defining adult-onset leukodystrophy phenotype and
      progressive CNS demyelination.
- name: Spasticity
  category: Neurologic
  phenotype_term:
    preferred_term: Spasticity
    term:
      id: HP:0001257
      label: Spasticity
  description: >-
    Upper motor neuron dysfunction may produce progressive spasticity.
  evidence:
  - reference: PMID:26053668
    reference_title: "LMNB1-related autosomal-dominant leukodystrophy: Clinical and radiological course."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Motor signs developed ascending from spastic paraplegia to tetraplegia and pseudobulbar palsy in the seventh decade."
    explanation: >-
      The longitudinal cohort supports spastic motor involvement during
      progression.
- name: Ataxia
  category: Neurologic
  phenotype_term:
    preferred_term: Ataxia
    term:
      id: HP:0001251
      label: Ataxia
  description: >-
    Cerebellar or long-tract involvement can cause progressive gait and limb
    incoordination.
  evidence:
  - reference: PMID:26053668
    reference_title: "LMNB1-related autosomal-dominant leukodystrophy: Clinical and radiological course."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Duplication of the LMNB1 gene encoding lamin B1 causes adult-onset autosomal-dominant leukodystrophy (ADLD) starting with autonomic symptoms, which are followed by pyramidal signs and ataxia."
    explanation: >-
      The longitudinal study identifies ataxia as a later motor feature after
      autonomic symptoms.
- name: Autonomic Dysfunction
  category: Neurologic
  phenotype_term:
    preferred_term: Autonomic dysfunction
    term:
      id: HP:0012332
      label: Abnormal autonomic nervous system physiology
  description: >-
    Autonomic involvement commonly appears early and may include bladder,
    bowel, sweating, erectile, or orthostatic symptoms.
  evidence:
  - reference: PMID:26053668
    reference_title: "LMNB1-related autosomal-dominant leukodystrophy: Clinical and radiological course."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Autonomic dysfunction appeared in the fifth to sixth decade, preceding or together with gait and coordination difficulties."
    explanation: >-
      The longitudinal cohort supports autonomic dysfunction as an early
      clinical feature.
- name: Cognitive Impairment
  category: Neurologic
  frequency: VERY_FREQUENT
  phenotype_term:
    preferred_term: Cognitive impairment
    term:
      id: HP:0100543
      label: Cognitive impairment
  description: Cognitive difficulties are frequent in recent LMNB1-related ADLD cohorts.
  evidence:
  - reference: DOI:10.1007/s44162-024-00055-w
    reference_title: A retrospective review of LMNB1-related autosomal dominant leukodystrophy
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Other reported symptoms included cognitive difficulties (8/8), fatigue (7/8), sleep issues (4/8), mood disturbances (5/8), tremor (4/8), and migraine (4/8)."
    explanation: Supports cognitive impairment as very frequent in the eight-patient Mayo Clinic cohort.
- name: Fatigue
  category: Neurologic
  frequency: VERY_FREQUENT
  phenotype_term:
    preferred_term: Fatigue
    term:
      id: HP:0012378
      label: Fatigue
  description: Fatigue is common in recent LMNB1-related ADLD cohorts.
  evidence:
  - reference: DOI:10.1007/s44162-024-00055-w
    reference_title: A retrospective review of LMNB1-related autosomal dominant leukodystrophy
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Other reported symptoms included cognitive difficulties (8/8), fatigue (7/8), sleep issues (4/8), mood disturbances (5/8), tremor (4/8), and migraine (4/8)."
    explanation: Supports fatigue as frequent in the eight-patient Mayo Clinic cohort.
- name: Sleep Disturbance
  category: Neurologic
  frequency: FREQUENT
  phenotype_term:
    preferred_term: Sleep disturbance
    term:
      id: HP:0002360
      label: Sleep disturbance
  description: Sleep disturbance is reported in recent LMNB1-related ADLD cohorts.
  evidence:
  - reference: DOI:10.1007/s44162-024-00055-w
    reference_title: A retrospective review of LMNB1-related autosomal dominant leukodystrophy
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Other reported symptoms included cognitive difficulties (8/8), fatigue (7/8), sleep issues (4/8), mood disturbances (5/8), tremor (4/8), and migraine (4/8)."
    explanation: Supports sleep disturbance in half of the eight-patient Mayo Clinic cohort.
- name: Mood Disturbance
  category: Psychiatric
  frequency: FREQUENT
  phenotype_term:
    preferred_term: Depression
    term:
      id: HP:0000716
      label: Depression
  description: Mood disturbances are reported in recent LMNB1-related ADLD cohorts.
  evidence:
  - reference: DOI:10.1007/s44162-024-00055-w
    reference_title: A retrospective review of LMNB1-related autosomal dominant leukodystrophy
    supports: PARTIAL
    evidence_source: HUMAN_CLINICAL
    snippet: "Other reported symptoms included cognitive difficulties (8/8), fatigue (7/8), sleep issues (4/8), mood disturbances (5/8), tremor (4/8), and migraine (4/8)."
    explanation: >-
      The cohort reports mood disturbances in most patients; the HPO binding is
      to the available depression term and is therefore partial.
- name: Tremor
  category: Neurologic
  frequency: FREQUENT
  phenotype_term:
    preferred_term: Tremor
    term:
      id: HP:0001337
      label: Tremor
  description: Tremor is reported in recent LMNB1-related ADLD cohorts.
  evidence:
  - reference: DOI:10.1007/s44162-024-00055-w
    reference_title: A retrospective review of LMNB1-related autosomal dominant leukodystrophy
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Other reported symptoms included cognitive difficulties (8/8), fatigue (7/8), sleep issues (4/8), mood disturbances (5/8), tremor (4/8), and migraine (4/8)."
    explanation: Supports tremor in half of the eight-patient Mayo Clinic cohort.
- name: Migraine
  category: Neurologic
  frequency: FREQUENT
  phenotype_term:
    preferred_term: Migraine
    term:
      id: HP:0002076
      label: Migraine
  description: Migraine is reported in recent LMNB1-related ADLD cohorts.
  evidence:
  - reference: DOI:10.1007/s44162-024-00055-w
    reference_title: A retrospective review of LMNB1-related autosomal dominant leukodystrophy
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Other reported symptoms included cognitive difficulties (8/8), fatigue (7/8), sleep issues (4/8), mood disturbances (5/8), tremor (4/8), and migraine (4/8)."
    explanation: Supports migraine in half of the eight-patient Mayo Clinic cohort.
genetic:
- name: LMNB1
  gene_term:
    preferred_term: LMNB1
    term:
      id: hgnc:6637
      label: LMNB1
  association: Causative
  features: >-
    LMNB1 causes ADLD through gain of expression, most often by whole-gene
    tandem duplication and more rarely by upstream regulatory deletion with
    enhancer adoption.
  inheritance:
  - name: Autosomal dominant inheritance
    evidence:
    - reference: PMID:26053668
      reference_title: "LMNB1-related autosomal-dominant leukodystrophy: Clinical and radiological course."
      supports: SUPPORT
      evidence_source: HUMAN_CLINICAL
      snippet: "Duplication of the LMNB1 gene encoding lamin B1 causes adult-onset autosomal-dominant leukodystrophy (ADLD) starting with autonomic symptoms, which are followed by pyramidal signs and ataxia."
      explanation: >-
        The title and abstract support autosomal-dominant inheritance in
        LMNB1-related ADLD.
  evidence:
  - reference: PMID:28769756
    reference_title: "An LMNB1 Duplication Caused Adult-Onset Autosomal Dominant Leukodystrophy in Chinese Family: Clinical Manifestations, Neuroradiology and Genetic Diagnosis."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "However, Multiplex ligand-dependent probe amplification (MLPA) showed whole duplication of LMNB1 gene which is co-segregated with the disease phenotype in this family."
    explanation: >-
      The family study supports LMNB1 duplication as a causative structural
      variant.
  - reference: PMID:40046440
    reference_title: "Case report: LMNB1 duplication-mediated autosomal dominant adult leukodystrophy in a Chinese family and literature review of Chinese patients."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Currently, two genetic alterations have been identified in association with the pathogenesis of ADLD: LMNB1 gene tandem duplication and LMNB1 gene upstream deletions."
    explanation: Supports the two major LMNB1 gain-of-expression structural variant classes represented in this entry.
diagnosis:
- name: LMNB1 Copy-Number Testing
  diagnosis_term:
    preferred_term: genetic testing
    term:
      id: MAXO:0000127
      label: genetic testing
  description: >-
    Targeted LMNB1 deletion/duplication analysis, MLPA, array-CGH, or other
    validated copy-number methods are needed when the phenotype and MRI pattern
    suggest LMNB1-related ADLD.
  results: >-
    Heterozygous LMNB1 duplication or an upstream regulatory deletion supports
    the molecular diagnosis.
  evidence:
  - reference: PMID:28769756
    reference_title: "An LMNB1 Duplication Caused Adult-Onset Autosomal Dominant Leukodystrophy in Chinese Family: Clinical Manifestations, Neuroradiology and Genetic Diagnosis."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "In order to understand the genetic cause of the disease in this family, target exome capture based next generation sequencing has been done, but no causative variants or possibly pathogenic variants has been identified."
    explanation: >-
      The study shows that sequence-focused testing can miss the diagnosis.
  - reference: PMID:28769756
    reference_title: "An LMNB1 Duplication Caused Adult-Onset Autosomal Dominant Leukodystrophy in Chinese Family: Clinical Manifestations, Neuroradiology and Genetic Diagnosis."
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "However, Multiplex ligand-dependent probe amplification (MLPA) showed whole duplication of LMNB1 gene which is co-segregated with the disease phenotype in this family."
    explanation: >-
      MLPA copy-number testing identified the familial LMNB1 duplication after
      exome sequencing was unrevealing.
- name: Characteristic Brain and Spine MRI Pattern
  diagnosis_term:
    preferred_term: magnetic resonance imaging procedure
    term:
      id: MAXO:0000424
      label: magnetic resonance imaging procedure
  description: >-
    Brain and spine MRI can show the characteristic symmetric white-matter and
    spinal cord involvement that should prompt LMNB1 copy-number testing.
  results: >-
    Symmetric confluent T2-weighted deep cerebral and periventricular white
    matter hyperintensities with internal capsule, corpus callosum, brainstem
    corticospinal tract, cerebellar peduncle, and spinal cord atrophy patterns.
  evidence:
  - reference: DOI:10.1007/s44162-024-00055-w
    reference_title: A retrospective review of LMNB1-related autosomal dominant leukodystrophy
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "All showed symmetric confluent T2W deep cerebral and periventricular white matter hyperintensities with involvement of the posterior limb of the internal capsule, corpus callosum, corticospinal tract in brain stem, and superior and middle cerebellar peduncles."
    explanation: Supports the hallmark brain MRI pattern in molecularly confirmed LMNB1-related ADLD.
  - reference: DOI:10.1007/s44162-024-00055-w
    reference_title: A retrospective review of LMNB1-related autosomal dominant leukodystrophy
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "Seven spine MRIs from six patients showed moderate diffuse atrophy of the spinal cord."
    explanation: Supports spinal cord atrophy as part of the MRI diagnostic pattern.
treatments:
- name: Symptom-Directed Supportive Care
  treatment_term:
    preferred_term: supportive care
    term:
      id: MAXO:0000950
      label: supportive care
  description: >-
    Management is supportive and symptom-directed, with attention to autonomic
    dysfunction, spasticity, mobility decline, fatigue, and cognitive or mood
    symptoms while disease-targeted therapy remains investigational.
  target_phenotypes:
  - preferred_term: Autonomic dysfunction
    term:
      id: HP:0012332
      label: Abnormal autonomic nervous system physiology
  - preferred_term: Spasticity
    term:
      id: HP:0001257
      label: Spasticity
  - preferred_term: Fatigue
    term:
      id: HP:0012378
      label: Fatigue
  evidence:
  - reference: DOI:10.1007/s44162-024-00055-w
    reference_title: A retrospective review of LMNB1-related autosomal dominant leukodystrophy
    supports: PARTIAL
    evidence_source: HUMAN_CLINICAL
    snippet: "Other reported symptoms included cognitive difficulties (8/8), fatigue (7/8), sleep issues (4/8), mood disturbances (5/8), tremor (4/8), and migraine (4/8)."
    explanation: Supports the clinical symptom targets for supportive management in the Mayo Clinic cohort.
  - reference: PMID:37564735
    reference_title: "Adult-onset leukodystrophies: a practical guide, recent treatment updates, and future directions."
    supports: PARTIAL
    evidence_source: OTHER
    snippet: "Comprehensive evaluation and molecular confirmation when available helps in prognostication, early initiation of treatment in certain disorders, enrollment in clinical trials, and provides valuable information for the family for reproductive counseling."
    explanation: Supports anticipatory management, treatment consideration when available, trial enrollment, and family counseling in adult-onset leukodystrophy care.
- name: Genetic Counseling
  treatment_term:
    preferred_term: genetic counseling
    term:
      id: MAXO:0000079
      label: genetic counseling
  description: >-
    Genetic counseling is appropriate after molecular confirmation because the
    disease is autosomal dominant and familial risk and reproductive decisions
    are central to care.
  evidence:
  - reference: PMID:37564735
    reference_title: "Adult-onset leukodystrophies: a practical guide, recent treatment updates, and future directions."
    supports: SUPPORT
    evidence_source: OTHER
    snippet: "Comprehensive evaluation and molecular confirmation when available helps in prognostication, early initiation of treatment in certain disorders, enrollment in clinical trials, and provides valuable information for the family for reproductive counseling."
    explanation: Supports genetic and reproductive counseling after molecular diagnosis in adult-onset leukodystrophies.
- name: Allele-Specific RNA Interference
  treatment_term:
    preferred_term: RNA interference therapy
    term:
      id: MAXO:0001592
      label: RNA interference therapy
  description: >-
    LMNB1-lowering RNA interference is a preclinical disease-targeted strategy
    intended to reduce excess LMNB1 expression while avoiding excessive
    suppression of the normal allele.
  evidence:
  - reference: PMID:31143934
    reference_title: "Allele-specific silencing as treatment for gene duplication disorders: proof-of-principle in autosomal dominant leukodystrophy."
    supports: PARTIAL
    evidence_source: IN_VITRO
    snippet: "Three of the small interfering RNAs were highly selective for the target allele and restored both LMNB1 mRNA and protein levels close to control levels."
    explanation: >-
      This supports a mechanistically targeted but preclinical RNAi approach in
      patient-derived and disease-relevant cellular models.
clinical_trials:
- name: NCT06816498
  phase: PHASE_I
  status: ACTIVE_NOT_RECRUITING
  description: >-
    Open-label single-participant phase 1/2 personalized antisense
    oligonucleotide study for LMNB1 mutation-associated ADLD.
  target_phenotypes:
  - preferred_term: Leukodystrophy
    term:
      id: HP:0002415
      label: Leukodystrophy
  evidence:
  - reference: clinicaltrials:NCT06816498
    reference_title: "An Open-label, Single-center, Single-participant Study of an Experimental Antisense Oligonucleotide Treatment for a Patient With LMNB1 Mutation Associated Autosomal Dominant Leukodystrophy (ADLD)"
    supports: SUPPORT
    evidence_source: HUMAN_CLINICAL
    snippet: "This research project entails delivery of a personalized antisense oligonucleotide (ASO) drug designed for a single participant with Autosomal Dominant Leukodystrophy (ADLD) due to LMNB1 mutation"
    explanation: Supports an active personalized ASO clinical trial for LMNB1-associated ADLD.
references:
- reference: PMID:28769756
  title: "An LMNB1 Duplication Caused Adult-Onset Autosomal Dominant Leukodystrophy in Chinese Family: Clinical Manifestations, Neuroradiology and Genetic Diagnosis."
  findings: []
- reference: PMID:26053668
  title: "LMNB1-related autosomal-dominant leukodystrophy: Clinical and radiological course."
  findings: []
- reference: PMID:25701871
  title: "A large genomic deletion leads to enhancer adoption by the lamin B1 gene: a second path to autosomal dominant adult-onset demyelinating leukodystrophy (ADLD)."
  findings: []
- reference: PMID:31143934
  title: "Allele-specific silencing as treatment for gene duplication disorders: proof-of-principle in autosomal dominant leukodystrophy."
  findings: []
- reference: DOI:10.1007/s44162-024-00055-w
  title: A retrospective review of LMNB1-related autosomal dominant leukodystrophy
  findings: []
- reference: PMID:37450245
  title: "Understanding the Ultra-Rare Disease Autosomal Dominant Leukodystrophy: an Updated Review on Morpho-Functional Alterations Found in Experimental Models."
  findings: []
- reference: PMID:37564735
  title: "Adult-onset leukodystrophies: a practical guide, recent treatment updates, and future directions."
  findings: []
- reference: PMID:40046440
  title: "Case report: LMNB1 duplication-mediated autosomal dominant adult leukodystrophy in a Chinese family and literature review of Chinese patients."
  findings: []
📚

References & Deep Research

References

8
PMID:28769756
An LMNB1 Duplication Caused Adult-Onset Autosomal Dominant Leukodystrophy in Chinese Family: Clinical Manifestations, Neuroradiology and Genetic Diagnosis.
No top-level findings curated for this source.
PMID:26053668
LMNB1-related autosomal-dominant leukodystrophy: Clinical and radiological course.
No top-level findings curated for this source.
PMID:25701871
A large genomic deletion leads to enhancer adoption by the lamin B1 gene: a second path to autosomal dominant adult-onset demyelinating leukodystrophy (ADLD).
No top-level findings curated for this source.
PMID:31143934
Allele-specific silencing as treatment for gene duplication disorders: proof-of-principle in autosomal dominant leukodystrophy.
No top-level findings curated for this source.
DOI:10.1007/s44162-024-00055-w
A retrospective review of LMNB1-related autosomal dominant leukodystrophy
No top-level findings curated for this source.
PMID:37450245
Understanding the Ultra-Rare Disease Autosomal Dominant Leukodystrophy: an Updated Review on Morpho-Functional Alterations Found in Experimental Models.
No top-level findings curated for this source.
PMID:37564735
Adult-onset leukodystrophies: a practical guide, recent treatment updates, and future directions.
No top-level findings curated for this source.
PMID:40046440
Case report: LMNB1 duplication-mediated autosomal dominant adult leukodystrophy in a Chinese family and literature review of Chinese patients.
No top-level findings curated for this source.

Deep Research

1
Falcon ▸
Disease Characteristics Research Template
Edison Scientific Literature 54 citations 2026-05-05T23:43:49.120226

Question: You are an expert researcher providing comprehensive, well-cited information.

Provide detailed information focusing on: 1. Key concepts and definitions with current understanding 2. Recent developments and latest research (prioritize 2023-2024 sources) 3. Current applications and real-world implementations 4. Expert opinions and analysis from authoritative sources 5. Relevant statistics and data from recent studies

Format as a comprehensive research report with proper citations. Include URLs and publication dates where available. Always prioritize recent, authoritative sources and provide specific citations for all major claims.

Disease Characteristics Research Template

Target Disease

  • Disease Name: Adult-Onset Autosomal Dominant Demyelinating Leukodystrophy
  • MONDO ID: (if available)
  • Category: Neurodegenerative Disease

Research Objectives

Please provide a comprehensive research report on Adult-Onset Autosomal Dominant Demyelinating Leukodystrophy covering all of the disease characteristics listed below. This report will be used to populate a disease knowledge base entry. Be thorough and cite primary literature (PMID preferred) for all claims.

For each section, suggested databases/resources are listed. These are the first places you should search for information on each topic.

1. Disease Information

Search first: OMIM, Orphanet, ICD-10/ICD-11, MeSH, PubMed

  • What is the disease? Provide a concise overview.
  • What are the key identifiers? (OMIM, Orphanet, ICD-10/ICD-11, MeSH, Mondo)
  • What are the common synonyms and alternative names?
  • Is the information derived from individual patients (e.g., EHR) or aggregated disease-level resources?

2. Etiology

  • Disease Causal Factors: What are the primary causes? (genetic, environmental, infectious, mechanistic)
  • Risk Factors:

    Search first: PubMed, Cochrane Library, UpToDate, clinical guidelines, ClinVar, ClinGen, GWAS Catalog, PheGenI, CTD, CDC, WHO, epidemiological databases

  • Genetic risk factors (causal variants, susceptibility loci, modifier genes)
  • Environmental risk factors (toxins, lifestyle, occupational exposures, age, sex, family history)
  • Protective Factors:

    Search first: PubMed, Cochrane Library, clinical trial databases, GWAS Catalog, gnomAD, WHO, CDC, nutrition databases

  • Genetic protective factors (protective variants, modifier alleles)
  • Environmental protective factors (diet, lifestyle, exposures that reduce risk)
  • Gene-Environment Interactions: How do genetic and environmental factors interact to influence disease?

    Search first: CTD, PubMed, PheGenI, GxE databases

3. Phenotypes

Search first: HPO (Human Phenotype Ontology), OMIM, Orphanet, PubMed, clinicaltrials.gov, MedDRA, SNOMED CT, DECIPHER, LOINC

For each phenotype, provide: - Phenotype type: symptoms, clinical signs, physical manifestations, behavioral changes, or laboratory abnormalities

For symptoms/signs: HPO, OMIM, Orphanet, PubMed For behavioral changes: HPO, DSM, RDoC (Research Domain Criteria), PubMed For laboratory abnormalities: LOINC, SNOMED CT, LabTests Online, PubMed - Phenotype characteristics: Search first: OMIM, Orphanet, HPO, PubMed - Age of symptom onset (neonatal, childhood, adult-onset, late-onset) - Symptom severity (mild, moderate, severe, variable) - Symptom progression (stable, progressive, episodic, fluctuating) - Frequency among affected individuals (percentage or qualitative) - Quality of life impact: Effects on daily functioning and well-being (per-phenotype when possible) Search first: EQ-5D database, SF-36, WHO QOL databases, PubMed - Suggest HPO (Human Phenotype Ontology) terms for each phenotype

4. Genetic/Molecular Information

  • Causal Genes: Gene mutations or chromosomal abnormalities responsible for disease (gene symbols, OMIM IDs)

    Search first: OMIM, ClinVar, HGMD, Ensembl, NCBI Gene

  • Pathogenic Variants:
  • Affected genes (gene symbols, HGNC IDs) > Search first: OMIM, NCBI Gene, Ensembl, HGNC, UniProt, GeneCards
  • Variant classification (pathogenic, likely pathogenic, VUS per ACMG/AMP guidelines) > Search first: ClinVar, ClinGen, ACMG/AMP guidelines, VarSome
  • Variant type/class (missense, frameshift, nonsense, splice-site, structural)
  • Allele frequency in population databases > Search first: gnomAD, 1000 Genomes, ExAC, TOPMed, dbSNP
  • Somatic vs germline origin > Search first: COSMIC (somatic), ClinVar, ICGC, TCGA
  • Functional consequences (loss of function, gain of function, dominant negative)
  • Modifier Genes: Genes that modify disease severity or expression
  • Epigenetic Information: DNA methylation, histone modifications, chromatin changes affecting disease

    Search first: ENCODE, Roadmap Epigenomics, MethBase, DiseaseMeth

  • Chromosomal Abnormalities: Large-scale genetic changes (aneuploidy, translocations, inversions)

    Search first: DECIPHER, ClinVar, ECARUCA, UCSC Genome Browser

5. Environmental Information

  • Environmental Factors: Non-genetic contributing factors (toxins, radiation, pollution, occupational exposure)

    Search first: CTD (Comparative Toxicogenomics Database), TOXNET, PubMed, EPA databases

  • Lifestyle Factors: Behavioral factors (smoking, diet, exercise, alcohol consumption)

    Search first: CDC databases, WHO, PubMed, NHANES

  • Infectious Agents: If applicable, pathogens causing or triggering disease (bacteria, viruses, fungi, parasites)

    Search first: NCBI Taxonomy, ViPR, BV-BRC, MicrobeDB, GIDEON

6. Mechanism / Pathophysiology

  • Molecular Pathways: Specific signaling cascades or biochemical pathways involved (Wnt, MAPK, mTOR, PI3K-AKT, etc.)

    Search first: KEGG, Reactome, WikiPathways, PathBank, BioCyc

  • Cellular Processes: Cell-level mechanisms (apoptosis, autophagy, cell cycle dysregulation, inflammation, etc.)

    Search first: Gene Ontology (GO), Reactome, KEGG, PubMed

  • Protein Dysfunction: How protein structure or function is altered (misfolding, aggregation, loss of function, gain of function)

    Search first: UniProt, PDB (Protein Data Bank), InterPro, Pfam, AlphaFold

  • Metabolic Changes: Alterations in metabolic processes (energy metabolism, lipid metabolism, amino acid metabolism)

    Search first: KEGG, BioCyc, HMDB (Human Metabolome Database), BRENDA

  • Immune System Involvement: Role of immune response (autoimmunity, immunodeficiency, chronic inflammation)

    Search first: ImmPort, Immunome Database, IEDB, Gene Ontology

  • Tissue Damage Mechanisms: How tissues/ are injured (oxidative stress, ischemia, fibrosis, necrosis)

    Search first: PubMed, Gene Ontology, Reactome

  • Biochemical Abnormalities: Specific molecular defects (enzyme deficiencies, receptor dysfunction, ion channel defects)

    Search first: BRENDA, UniProt, KEGG, OMIM, PubMed

  • Epigenetic Changes: DNA methylation, histone modifications affecting gene expression in disease

    Search first: ENCODE, Roadmap Epigenomics, MethBase, DiseaseMeth

  • Molecular Profiling (if available):
  • Transcriptomics/gene expression changes > Search first: GEO (Gene Expression Omnibus), ArrayExpress, GTEx, Human Cell Atlas, SRA
  • Proteomics findings > Search first: PRIDE, ProteomeXchange, Human Protein Atlas, STRING, BioGRID
  • Metabolomics signatures > Search first: MetaboLights, Metabolomics Workbench, HMDB, METLIN
  • Lipidomics alterations > Search first: LIPID MAPS, SwissLipids, LipidHome, Metabolomics Workbench
  • Genomic structural features > Search first: UCSC Genome Browser, Ensembl, NCBI, dbVar, DGV
  • Advanced Technologies (if applicable):
  • Single-cell analysis findings (cell-type specific mechanisms, cellular heterogeneity) > Search first: Human Cell Atlas, Single Cell Portal, GEO, CELLxGENE
  • Spatial transcriptomics findings > Search first: GEO, Spatial Research, Vizgen, 10x Genomics data
  • Multi-omics integration results > Search first: TCGA, ICGC, cBioPortal, LinkedOmics, PubMed
  • Functional genomics screens (CRISPR, RNAi) > Search first: DepMap, GenomeRNAi, PubMed, BioGRID ORCS

For each mechanism, describe: - The causal chain from initial trigger to clinical manifestation - Which mechanisms are upstream vs downstream - What cell types and biological processes are involved - Suggest GO terms for biological processes and CL terms for cell types

7. Anatomical Structures Affected

  • Organ Level:
  • Primary organs directly affected
  • Secondary organ involvement (complications, secondary effects)
  • Body systems involved (cardiovascular, nervous, digestive, respiratory, endocrine, etc.)

    Search first: Uberon, FMA (Foundational Model of Anatomy), OMIM, HPO, ICD-11, MeSH, SNOMED CT

  • Tissue and Cell Level:
  • Specific tissue types affected (epithelial, connective, muscle, nervous)
  • Specific cell populations targeted (with Cell Ontology terms)

    Search first: Uberon, Human Protein Atlas, Cell Ontology, Human Cell Atlas, CellMarker, PanglaoDB

  • Subcellular Level:
  • Cellular compartments involved (mitochondria, nucleus, ER, lysosomes) (with GO Cellular Component terms)

    Search first: Gene Ontology (Cellular Component), UniProt, Human Protein Atlas

  • Localization:
  • Specific anatomical sites (with UBERON terms) > Search first: FMA, Uberon, NeuroNames (for brain), SNOMED CT
  • Lateralization (unilateral, bilateral, asymmetric) > Search first: HPO, clinical literature, imaging databases

8. Temporal Development

  • Onset:
  • Typical age of onset (congenital, pediatric, adult, geriatric)
  • Onset pattern (acute, subacute, chronic, insidious)

    Search first: OMIM, Orphanet, HPO, PubMed

  • Progression:
  • Disease stages (early, intermediate, advanced, end-stage) > Search first: Cancer Staging Manual (AJCC), WHO classifications, PubMed
  • Progression rate (rapid, slow, variable)
  • Disease course pattern (episodic, relapsing-remitting, progressive, stable)
  • Disease duration (self-limited, chronic lifelong)

    Search first: Disease registries, longitudinal cohort databases, natural history studies, PubMed, Orphanet, OMIM

  • Patterns:
  • Remission patterns (spontaneous, treatment-induced) > Search first: Clinical trial databases, disease registries, PubMed
  • Critical periods (time windows of vulnerability or opportunity for intervention) > Search first: PubMed, developmental biology databases, clinical guidelines

9. Inheritance and Population

  • Epidemiology:
  • Prevalence (cases per 100,000 at given time)
  • Incidence (new cases per 100,000 per year)

    Search first: Orphanet, CDC, WHO, GBD (Global Burden of Disease), national registries, SEER, disease registries

  • For Genetic Etiology:
  • Inheritance pattern (AD, AR, X-linked, mitochondrial, multifactorial, polygenic) > Search first: OMIM, Orphanet, ClinVar, GTR (Genetic Testing Registry)
  • Penetrance (complete, incomplete, age-dependent) > Search first: ClinVar, OMIM, PubMed, ClinGen
  • Expressivity (variable, consistent) > Search first: OMIM, ClinVar, PubMed
  • Genetic anticipation (increasing severity in successive generations) > Search first: OMIM, PubMed (especially for repeat expansion disorders)
  • Germline mosaicism > Search first: ClinVar, OMIM, genetic counseling literature, PubMed
  • Founder effects (population-specific mutations) > Search first: gnomAD, population genetics databases, PubMed
  • Consanguinity role > Search first: OMIM, population studies, genetic counseling resources
  • Carrier frequency > Search first: gnomAD, carrier screening databases, GeneReviews, GTR
  • Population Demographics:
  • Affected populations (ethnic or demographic groups with higher prevalence) > Search first: gnomAD, 1000 Genomes, PAGE Study, PubMed, population registries
  • Geographic distribution (endemic areas, regional variation) > Search first: WHO, CDC, GBD, Orphanet, geographic epidemiology databases
  • Geographic distribution of specific variants
  • Sex ratio (male:female) > Search first: Disease registries, OMIM, PubMed, epidemiological databases
  • Age distribution of affected individuals > Search first: CDC, disease registries, SEER, Orphanet

10. Diagnostics

  • Clinical Tests:
  • Laboratory tests (blood, urine, tissue chemistry, specific enzyme assays) > Search first: LOINC, LabTests Online, PubMed
  • Biomarkers (proteins, metabolites, genetic markers, circulating biomarkers) > Search first: FDA Biomarker List, BEST (Biomarkers, EndpointS, and other Tools), PubMed
  • Imaging studies (X-ray, CT, MRI, PET, ultrasound) > Search first: RadLex, DICOM, Radiopaedia, imaging databases
  • Functional tests (pulmonary function, cardiac stress tests) > Search first: LOINC, clinical guidelines, PubMed
  • Electrophysiology (EEG, EMG, ECG, nerve conduction studies) > Search first: LOINC, clinical neurophysiology databases, PubMed
  • Biopsy findings (histopathology, immunohistochemistry) > Search first: SNOMED CT, College of American Pathologists resources, PubMed
  • Pathology findings (microscopic examination) > Search first: SNOMED CT, Digital Pathology databases, PubMed
  • Genetic Testing:

    Search first: GTR (Genetic Testing Registry), GeneReviews, ClinGen

  • Overview of recommended genetic testing approach
  • Whole genome sequencing (WGS) utility > Search first: GTR, ClinVar, GEL (Genomics England), gnomAD
  • Whole exome sequencing (WES) utility > Search first: GTR, ClinVar, OMIM, GeneMatcher
  • Gene panels (which panels, which genes) > Search first: GTR, ClinVar, laboratory-specific databases
  • Single gene testing > Search first: GTR, ClinVar, OMIM, GeneReviews
  • Chromosomal microarray (CMA) > Search first: DECIPHER, ClinVar, dbVar, ECARUCA
  • Karyotyping > Search first: Chromosome Abnormality Database, ClinVar, cytogenetics resources
  • FISH > Search first: ClinVar, cytogenetics databases, PubMed
  • Mitochondrial DNA testing > Search first: MITOMAP, MSeqDR, ClinVar, GTR
  • Repeat expansion testing > Search first: GTR, ClinVar, repeat expansion databases, PubMed
  • Omics-Based Diagnostics (if applicable):
  • RNA sequencing / transcriptomics > Search first: GEO, ArrayExpress, GTEx, RNA-seq databases
  • Proteomics > Search first: PRIDE, ProteomeXchange, FDA Biomarker database
  • Metabolomics > Search first: MetaboLights, Metabolomics Workbench, HMDB
  • Epigenomics > Search first: GEO, ENCODE, Roadmap Epigenomics, MethBase
  • Liquid biopsy > Search first: COSMIC, ClinVar, liquid biopsy databases, PubMed
  • Clinical Criteria:
  • Standardized diagnostic criteria (DSM, ICD, society guidelines) > Search first: DSM-5, ICD-11, clinical society guidelines, UpToDate
  • Differential diagnosis (other conditions to rule out, with distinguishing features) > Search first: DynaMed, UpToDate, clinical decision support systems
  • Screening:
  • Screening methods for asymptomatic individuals (newborn screening, carrier screening, cascade screening) > Search first: ACMG recommendations, CDC newborn screening, GTR

11. Outcome/Prognosis

  • Survival and Mortality:
  • Survival rate (5-year, 10-year, overall) > Search first: SEER, cancer registries, disease-specific registries, PubMed
  • Life expectancy (with and without treatment if applicable) > Search first: Orphanet, disease registries, actuarial databases, PubMed
  • Mortality rate > Search first: CDC, WHO, GBD, national mortality databases
  • Disease-specific mortality (deaths directly attributable to disease) > Search first: Disease registries, CDC Wonder, GBD, PubMed
  • Morbidity and Function:
  • Morbidity (disease-related disability and health impacts) > Search first: GBD, WHO, disability databases, PubMed
  • Disability outcomes (long-term functional impairments) > Search first: ICF (International Classification of Functioning), disability registries
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For each treatment, suggest MAXO (Medical Action Ontology) terms where applicable.

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15. Model Organisms

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  • Applications:
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  • Resources:
  • Model databases > Search first: MGI, RGD, ZFIN, FlyBase, WormBase, IMSR, EMMA, MMRRC

Citation Requirements

  • Cite primary literature (PMID preferred) for all mechanistic and clinical claims
  • Prioritize recent reviews and landmark papers
  • Include direct quotes from abstracts where possible to support key statements
  • Distinguish evidence source types: human clinical, model organism, in vitro, computational

Output Format

Structure your response as a comprehensive narrative organized by the sections above. For each section, provide: - Factual content with specific details (numbers, percentages, gene names, variant nomenclature) - Ontology term suggestions (HPO, GO, CL, UBERON, CHEBI, MAXO, MONDO) where applicable - Evidence citations with PMIDs - Direct quotes from abstracts to support key claims - Clear indication when information is not available or not applicable for this disease

This report will be used to populate a disease knowledge base entry with: - Pathophysiology descriptions with causal chains - Gene/protein annotations (HGNC, GO terms) - Phenotype associations (HP terms) with frequencies - Cell type involvement (CL terms) - Anatomical locations (UBERON terms) - Chemical entities (CHEBI terms) - Treatment annotations (MAXO terms) - Evidence items with PMIDs and exact abstract quotes - Epidemiology, prognosis, diagnostic, and prevention information - Animal model descriptions with phenotype recapitulation details

Comprehensive Disease Characteristics Research Report

Target disease

Adult-Onset Autosomal Dominant Demyelinating Leukodystrophy (ADLD; LMNB1-related autosomal dominant leukodystrophy) — a rare, progressive adult-onset leukodystrophy caused by LMNB1 overexpression, leading to central nervous system (CNS) demyelination with a characteristic symmetric MRI pattern and prominent autonomic dysfunction. (ortiz2024aretrospectivereview pages 1-2, neri2023understandingtheultrarare pages 1-2)

Disease / synonyms Key identifiers explicitly stated Causal gene & mechanism Typical age of onset Core clinical features Hallmark MRI findings Natural history / prognosis Source year & DOI URL Best supporting citations
Adult-onset autosomal dominant demyelinating leukodystrophy (ADLD); LMNB1-related autosomal dominant leukodystrophy; adult-onset autosomal dominant leukodystrophy with autonomic symptoms OMIM/MIM #169500 explicitly stated LMNB1 (5q23.2); heterozygous LMNB1 duplication causing Lamin B1 overexpression and CNS demyelination Usually 4th-6th decade; mean/median onset around late 30s to 40s Early autonomic dysfunction (bladder, erectile dysfunction, orthostatic hypotension, sweating abnormalities), then spasticity/pyramidal signs, ataxia/tremor, later cognitive decline Symmetric confluent T2 white-matter hyperintensities involving deep/periventricular cerebral WM, corticospinal tracts, posterior limb of internal capsule, corpus callosum, brainstem, middle/superior cerebellar peduncles; spinal cord atrophy/thinning Slowly progressive, fatal/life-limiting; survival often 10-20+ years after onset 2024, https://doi.org/10.1007/s44162-024-00055-w ; 2019, https://doi.org/10.1136/jnnp-2018-319481 ; 2017, https://doi.org/10.3389/fnmol.2017.00215 (ortiz2024aretrospectivereview pages 1-2, ortiz2024aretrospectivereview pages 2-3, dai2017anlmnb1duplication pages 1-2, lin2011adultonsetautosomaldominant pages 1-2)
LMNB1-related ADLD due to upstream noncoding deletion OMIM #169500 explicitly stated LMNB1; large heterozygous upstream deletion (e.g., ~660 kb) removes a topological domain boundary, causing enhancer adoption and LMNB1 overexpression 4th-5th decade typically; reported deletion cases 32-52 years Progressive leukodystrophy with weakness, spasticity, hypophonia/dysarthria, cerebellar dysfunction; compared with duplication cases, may show less early dysautonomia and less cerebellar/spinal involvement Widespread white-matter alterations; corticospinal tract involvement from upper frontal lobes to cerebral peduncles; spinal cord may be relatively less affected than duplication cases in some families Fatal progressive course; death often 10-20 years after onset 2015, https://doi.org/10.1093/hmg/ddv065 ; 2019, https://doi.org/10.1212/nxg.0000000000000305 (giorgio2015alargegenomic pages 1-2, nmezi2019genomicdeletionsupstream pages 1-2)
Longitudinal LMNB1-duplication ADLD natural history Not focused on identifier; disease is LMNB1-related ADLD LMNB1 duplication Symptoms usually begin in 5th-6th decade; MRI may be abnormal >10 years before symptoms and as early as age 29 in asymptomatic carriers Autonomic dysfunction often precedes motor symptoms; ascending myelopathy pattern with gait impairment, spastic paraplegia progressing to tetraplegia/pseudobulbar palsy; mild early cognitive issues, dementia late Extensive T2 hyperintensities in cerebellar peduncles and cerebral WM with relatively spared periventricular rim early; pyramidal tract extension; all carriers showed spinal cord WM abnormalities; no gadolinium enhancement EDSS 6 at mean 59 ± 8 years (11 ± 5 years from onset); EDSS 8 at mean 61 ± 6 years (14 ± 4 years from onset); interval EDSS 6→8 5 ± 2 years; deaths at mean 66 ± 6 years (17 ± 6 years from onset); median survival 18 years 2015, https://doi.org/10.1002/ana.24452 (finnsson2015lmnb1‐relatedautosomal‐dominantleukodystrophy pages 1-2, finnsson2015lmnb1‐relatedautosomal‐dominantleukodystrophy pages 6-7, finnsson2015lmnb1‐relatedautosomal‐dominantleukodystrophy pages 9-12, finnsson2015lmnb1‐relatedautosomal‐dominantleukodystrophy pages 7-9)
Mayo Clinic retrospective LMNB1-related ADLD cohort No additional identifier stated in excerpt beyond disease name All 8 patients had LMNB1 duplication Onset range 33-64 years; median onset 38.5 years; median diagnosis age 46 years Cognitive difficulties 8/8, fatigue 7/8, mood disturbances 5/8, tremor 4/8, migraine 4/8; sex-specific first symptoms included erectile dysfunction/neurogenic bladder in men and weakness/bladder dysfunction/depression in women All reviewed brain MRIs showed symmetric confluent T2 deep cerebral/periventricular WM hyperintensities with internal capsule, corpus callosum, brainstem corticospinal tract, superior/middle cerebellar peduncle involvement; spine MRI showed moderate diffuse cord atrophy Median diagnostic delay 6 years (IQR 2.3-10); white-matter MRI abnormalities can predate symptoms by 9-16 years in examples; no cure, supportive management only 2024, https://doi.org/10.1007/s44162-024-00055-w (ortiz2024aretrospectivereview pages 1-2, ortiz2024aretrospectivereview pages 2-3, ortiz2024aretrospectivereview pages 3-5)

Table: This table condenses the core disease-defining information for LMNB1-related adult-onset autosomal dominant demyelinating leukodystrophy, including identifiers, mechanisms, phenotype, imaging, and prognosis. It is useful as a quick-reference artifact for knowledge-base population and citation tracking.

Domain Key points for LMNB1-related ADLD Practical implementation / test or treatment Source year + URL Evidence
Diagnostic clues: clinical phenotype Adult-onset leukodystrophy, usually 4th-5th decade; early autonomic dysfunction is typical (bladder/bowel dysfunction, orthostatic hypotension, sweating abnormalities, erectile dysfunction), followed by gait impairment, pyramidal signs/spasticity, ataxia, and later cognitive decline; women may present with motor-predominant phenotypes and cases may be mistaken for multiple sclerosis or bvFTD-spectrum disease Suspect LMNB1-related ADLD in adults with progressive dysautonomia plus spastic-ataxic syndrome and family history suggestive of autosomal dominant inheritance 2024: https://doi.org/10.1007/s44162-024-00055-w ; 2023: https://doi.org/10.3389/fneur.2023.1219324 (ortiz2024aretrospectivereview pages 3-5, muthusamy2023adultonsetleukodystrophiesa pages 10-11)
Diagnostic clues: hallmark MRI Stereotyped MRI pattern: symmetric confluent T2 white-matter hyperintensities involving deep/periventricular cerebral white matter, corticospinal tracts, posterior limb of the internal capsule, corpus callosum, brainstem, and middle/superior cerebellar peduncles; relative sparing of subcortical U-fibers and periventricular rim may help; spinal cord atrophy/thinning is common; no contrast enhancement is typical Obtain brain MRI with T2/FLAIR and spine imaging; recognize that MRI abnormalities can predate symptoms by years and may be the earliest clue 2024: https://doi.org/10.1007/s44162-024-00055-w ; 2023: https://doi.org/10.3389/fneur.2023.1219324 ; 2015: https://doi.org/10.1002/ana.24452 (ortiz2024aretrospectivereview pages 2-3, muthusamy2023adultonsetleukodystrophiesa pages 10-11, finnsson2015lmnb1‐relatedautosomal‐dominantleukodystrophy pages 6-7)
Recommended genetic confirmation Disease is caused by LMNB1 dosage/expression abnormalities: usually heterozygous LMNB1 duplication, rarely upstream deletion causing LMNB1 overexpression Order targeted LMNB1 copy-number / structural-variant testing when clinicoradiologic pattern is suggestive 2024: https://doi.org/10.1007/s44162-024-00055-w ; 2023: https://doi.org/10.3389/fneur.2023.1219324 ; 2015: https://doi.org/10.1093/hmg/ddv065 (ortiz2024aretrospectivereview pages 3-5, muthusamy2023adultonsetleukodystrophiesa pages 10-11, giorgio2015alargegenomic pages 1-2)
Genetic methods to use Copy-number focused methods are required; literature specifically supports targeted CNV/duplication testing and notes use of MLPA, gene-targeted microarray/aCGH, capillary-array methods, qPCR/other CNV assays in adult leukodystrophy workflows; custom array-CGH identified upstream LMNB1 deletion in one family Preferred methods: LMNB1 deletion/duplication analysis, MLPA, array-CGH/gene-targeted microarray, or other validated CNV assays; consider single-gene LMNB1 testing first if phenotype is classic 2023: https://doi.org/10.3389/fneur.2023.1219324 ; 2024: https://doi.org/10.1007/s44162-024-00055-w ; 2015: https://doi.org/10.1093/hmg/ddv065 (muthusamy2023adultonsetleukodystrophiesa pages 23-24, ortiz2024aretrospectivereview pages 3-5, ortiz2024aretrospectivereview pages 2-3, giorgio2015alargegenomic pages 1-2)
Limitation of standard NGS Standard short-read NGS/WES/WGS may miss LMNB1 duplications/upstream deletions and other CNV/deep intronic/complex variants; relying only on routine NGS can delay diagnosis If exome/genome is negative but MRI/phenotype strongly suggest ADLD, reflex to CNV-focused LMNB1 testing rather than stopping workup 2023: https://doi.org/10.3389/fneur.2023.1219324 ; 2024: https://doi.org/10.1007/s44162-024-00055-w (muthusamy2023adultonsetleukodystrophiesa pages 10-11, ortiz2024aretrospectivereview pages 3-5, muthusamy2023adultonsetleukodystrophiesa pages 21-23)
Ancillary autonomic testing Autonomic reflex screen, tilt table, QSART, thermoregulatory sweat testing, and urodynamics often show orthostatic hypotension, anhidrosis, and bladder dysfunction Useful both for phenotype definition and longitudinal monitoring, especially in early dysautonomia 2024: https://doi.org/10.1007/s44162-024-00055-w (ortiz2024aretrospectivereview pages 2-3)
Ancillary electrophysiology EMG/NCS are often normal or do not show polyneuropathy; neurophysiology may instead support central myelopathy (e.g., SSEPs, motor conduction delay in some series) Use EMG/NCS mainly to exclude peripheral neuropathy mimics rather than to confirm ADLD 2024: https://doi.org/10.1007/s44162-024-00055-w ; 2015: https://doi.org/10.1002/ana.24452 (ortiz2024aretrospectivereview pages 2-3, finnsson2015lmnb1‐relatedautosomal‐dominantleukodystrophy pages 6-7)
General adult leukodystrophy workflow First exclude acquired mimics (infectious, inflammatory, autoimmune, vascular, neoplastic, toxic, metabolic), then integrate family history, exam, MRI pattern recognition, biochemical testing, and genetics; advanced MRI and periodic reinterpretation improve yield Practical workflow: history + 3-generation pedigree -> MRI pattern review -> targeted biochemical tests for treatable mimics -> targeted CNV/single-gene testing if classic -> broader panel/WES/WGS with reanalysis if unresolved 2023: https://doi.org/10.3389/fneur.2023.1219324 ; 2019: https://doi.org/10.1148/rg.2019180081 ; 2018: https://doi.org/10.1038/nrneurol.2017.175 (muthusamy2023adultonsetleukodystrophiesa pages 23-24, muthusamy2023adultonsetleukodystrophiesa pages 1-2, muthusamy2023adultonsetleukodystrophiesa pages 21-23, kohler2018adulthoodleukodystrophies pages 3-4, resende2019adultleukodystrophiesa pages 1-2)
Key differential: multiple sclerosis / acquired inflammatory myeloleukoencephalopathy ADLD can mimic MS, but ADLD typically has symmetric confluent white-matter disease, prominent dysautonomia, lack of gadolinium enhancement, and spinal cord atrophy rather than inflammatory lesions; acquired causes are suggested by rapid onset, steroid responsiveness, systemic features, enhancement Use MRI symmetry/enhancement pattern, course, and inflammatory context to separate ADLD from MS and other acquired disorders 2023: https://doi.org/10.3389/fneur.2023.1219324 ; 2019: https://doi.org/10.1136/jnnp-2018-319481 (muthusamy2023adultonsetleukodystrophiesa pages 10-11, lynch2019practicalapproachto pages 2-3, muthusamy2023adultonsetleukodystrophiesa pages 21-23)
Key differential: AMN / X-ALD and other inherited leukodystrophies AMN may show normal brain MRI or pyramidal-tract changes with spinal cord atrophy; AMACR deficiency shows symmetric thalamic/midbrain/pons/cerebellar-tract changes and elevated pristanic acid; CSF1R disease may have early psychiatric syndrome and punctate calcifications on CT/gradient-echo; Gordon Holmes syndrome has prominent cerebellar atrophy/endocrine clues Distinguish with VLCFA testing, pristanic acid, CT/gradient-echo for calcifications, endocrine evaluation, and disorder-specific gene testing 2023: https://doi.org/10.3389/fneur.2023.1219324 ; 2019: https://doi.org/10.1136/jnnp-2018-319481 (muthusamy2023adultonsetleukodystrophiesa pages 10-11, lynch2019practicalapproachto pages 2-3)
Current standard treatment No curative or approved disease-modifying therapy; management is supportive and symptomatic Symptom-directed care may include bladder/autonomic management, spasticity relief, physical/functional exercise, cognitive support, dietary guidance/neurotrophic support in reported case series, and multidisciplinary follow-up 2024: https://doi.org/10.1007/s44162-024-00055-w ; 2025: https://doi.org/10.3389/fnins.2025.1531593 (ortiz2024aretrospectivereview pages 3-5, jiang2025casereportlmnb1 pages 4-5)
Investigational therapy: allele-specific RNAi Preclinical proof-of-concept supports allele-specific RNA interference to reduce LMNB1 toward physiologic levels without over-suppression; siRNA/shRNA targeting rs1051644 restored LMNB1 mRNA/protein near control levels and improved nuclear morphology and neurite growth in fibroblasts, directly reprogrammed neurons, and oligodendrocyte models Experimental only; supports LMNB1-lowering as a rational targeted strategy for future translation 2019: https://doi.org/10.1093/brain/awz139 (giorgio2019allelespecificsilencingas pages 1-6, giorgio2019allelespecificsilencingas pages 6-10, giorgio2019allelespecificsilencingas pages 17-20, giorgio2019allelespecificsilencingas pages 20-23)
Investigational therapy: personalized ASO clinical trial ClinicalTrials.gov lists a personalized antisense oligonucleotide trial for a single participant with LMNB1-duplication ADLD: nL-LMNB1-001, open-label, phase 1/2, active-not-recruiting, sponsor n-Lorem Foundation with Mayo Clinic collaboration, enrollment 1 Endpoints at baseline and 6/12/18/24 months include gait motion analysis, 6-minute walk, 25-feet walk, neurological functioning, MRI brain atrophy; secondary measures include urodynamics, autonomic testing, and safety/tolerability 2025 registry entry: https://clinicaltrials.gov/study/NCT06816498 (NCT06816498 chunk 1)

Table: This table summarizes how LMNB1-related ADLD is recognized and confirmed in practice, including the MRI and autonomic phenotype, the need for CNV-focused LMNB1 testing beyond standard NGS, major differential diagnoses, and the current treatment landscape from supportive care to emerging gene-silencing therapies and the personalized ASO trial NCT06816498.

1. Disease information

1.1 Overview (current understanding)

ADLD is a slowly progressive, life-limiting/fatal adult-onset leukodystrophy characterized by progressive CNS white-matter loss/demyelination, typically beginning with autonomic dysfunction and later evolving to spasticity/pyramidal signs and ataxia, with cognitive decline occurring later in the course in many patients. (ortiz2024aretrospectivereview pages 1-2, neri2023understandingtheultrarare pages 1-2, nmezi2019genomicdeletionsupstream pages 1-2)

A key practical diagnostic observation from longitudinal cohorts is that MRI can become abnormal many years before symptoms, making imaging pattern recognition a major real-world entry point for diagnosis. (finnsson2015lmnb1‐relatedautosomal‐dominantleukodystrophy pages 6-7, ortiz2024aretrospectivereview pages 3-5)

1.2 Key identifiers

  • OMIM/MIM: 169500 (“ADLD”) is explicitly stated in multiple primary sources. (dai2017anlmnb1duplication pages 1-2, nmezi2019genomicdeletionsupstream pages 1-2)
  • Other requested identifiers (Orphanet, ICD-10/11, MeSH, MONDO): not present in the retrieved full-text excerpts used for this report; therefore they cannot be reported here with evidence-grade citation. (ortiz2024aretrospectivereview pages 1-2, neri2023understandingtheultrarare pages 1-2)

1.3 Synonyms / alternative names

Synonyms used in the cited literature include: * “LMNB1-related autosomal dominant leukodystrophy” (ortiz2024aretrospectivereview pages 1-2) * “Adult-onset autosomal dominant leukodystrophy with autonomic symptoms” (santos2012adultonsetautosomaldominant pages 3-3) * “Autosomal Dominant Leukodystrophy with Autonomic Disease” (educational materials) (gosky2021assessmentanddevelopment pages 92-96)

1.4 Evidence provenance

The information in this report is derived primarily from: * Aggregated disease-level resources: expert reviews and structured diagnostic guides for adult leukodystrophies (2023–2024 emphasized). (neri2023understandingtheultrarare pages 1-2, muthusamy2023adultonsetleukodystrophiesa pages 10-11) * Human clinical cohorts/case series: longitudinal natural history (Finnsson 2015) and a 2024 Mayo Clinic retrospective cohort. (finnsson2015lmnb1‐relatedautosomal‐dominantleukodystrophy pages 6-7, ortiz2024aretrospectivereview pages 1-2) * Mechanistic/model-organism studies: transgenic mouse and cellular models summarized in the 2023 mechanistic review. (neri2023understandingtheultrarare pages 4-6, neri2023understandingtheultrarare pages 6-7)

2. Etiology

2.1 Disease causal factors

ADLD is fundamentally a genetic dosage/regulatory disorder: both coding and non-coding structural alterations at the LMNB1 locus converge on LMNB1 (lamin B1) overexpression, which is considered causal for CNS demyelination. (neri2023understandingtheultrarare pages 1-2, nmezi2019genomicdeletionsupstream pages 1-2)

Two established pathogenic alteration classes: 1. Tandem duplication spanning LMNB1 (most common) → increased LMNB1 gene dosage and expression. (dai2017anlmnb1duplication pages 1-2, nmezi2019genomicdeletionsupstream pages 1-2) 2. Upstream non-coding deletions that cause enhancer adoption (disrupted 3D genomic boundary permitting forebrain enhancers to activate LMNB1) → LMNB1 overexpression without LMNB1 coding duplication. (giorgio2015alargegenomic pages 1-2, nmezi2019genomicdeletionsupstream pages 1-2)

Quantitative tissue evidence for LMNB1 overexpression includes ~2–3-fold increased LMNB1 transcripts in one upstream-deletion family, and ~7-fold increased lamin B1 protein in frontal lobe compared with control in postmortem tissue. (giorgio2015alargegenomic pages 1-2)

2.2 Risk factors

Primary risk factor: autosomal dominant inheritance of a pathogenic LMNB1 structural variant. Family history is frequently present (e.g., 6/8 in one Mayo cohort). (ortiz2024aretrospectivereview pages 1-2)

Non-genetic/environmental susceptibility factors are not established in the cited sources; the disorder is best understood as genetically driven. (neri2023understandingtheultrarare pages 1-2)

2.3 Protective factors

No protective genetic variants or protective environmental factors were identified in the retrieved evidence. (neri2023understandingtheultrarare pages 1-2)

2.4 Gene–environment interaction

Not clearly established in the retrieved evidence. Some clinical observations in longitudinal cohorts include pseudoexacerbations with heat, fever, or infections, suggesting that environmental stressors can transiently worsen symptoms, but these do not constitute validated causal gene–environment interactions. (finnsson2015lmnb1‐relatedautosomal‐dominantleukodystrophy pages 9-12)

3. Phenotypes

3.1 Core phenotype spectrum (human)

Across cohorts, the most characteristic phenotype is early autonomic dysfunction, followed by progressive motor system involvement: * Autonomic dysfunction: neurogenic bladder/urinary urgency, orthostatic hypotension, anhidrosis/sweating abnormalities; in a longitudinal cohort, bladder dysfunction was present in 100% and orthostatic hypotension in 77%. (finnsson2015lmnb1‐relatedautosomal‐dominantleukodystrophy pages 6-7) * Pyramidal tract dysfunction: spasticity, progressive spastic paraparesis progressing caudal→rostral in advanced disease. (finnsson2015lmnb1‐relatedautosomal‐dominantleukodystrophy pages 9-12) * Cerebellar involvement: ataxia, tremor; in a Mayo cohort tremor occurred in 4/8. (ortiz2024aretrospectivereview pages 1-2) * Cognitive/psychiatric: cognitive difficulties were reported in 8/8 in the Mayo cohort; mood disturbances 5/8; sleep issues 4/8. (ortiz2024aretrospectivereview pages 1-2)

3.2 Phenotype characteristics (age of onset, progression)

  • Onset: commonly in the 4th–6th decade; 2024 Mayo cohort onset range 33–64 years. (ortiz2024aretrospectivereview pages 1-2)
  • Progression: slow, insidious progression over years with increasing disability; a characteristic ascending myelopathy pattern is described in the longitudinal study. (finnsson2015lmnb1‐relatedautosomal‐dominantleukodystrophy pages 1-2, finnsson2015lmnb1‐relatedautosomal‐dominantleukodystrophy pages 9-12)

3.3 Phenotype frequencies (recent quantitative cohort)

From an 8-patient Mayo Clinic retrospective cohort (molecularly confirmed LMNB1 duplication): * cognitive difficulties 8/8 * fatigue 7/8 * sleep issues 4/8 * mood disturbances 5/8 * tremor 4/8 * migraine 4/8 * family history positive 6/8 * diagnostic delay: median 6 years (IQR 2.3–10) (ortiz2024aretrospectivereview pages 1-2)

3.4 Quality of life impact

Direct standardized quality-of-life instruments (EQ-5D/SF-36/PROMIS) were not reported in the retrieved excerpts. However, progressive disability milestones (EDSS progression) and autonomic morbidity (urodynamic abnormalities) indicate substantial impairment in mobility and daily functioning. (finnsson2015lmnb1‐relatedautosomal‐dominantleukodystrophy pages 6-7, ortiz2024aretrospectivereview pages 2-3)

3.5 Suggested HPO terms (examples)

Based on described clinical features, plausible HPO mappings include: * Autonomic dysfunction: Neurogenic bladder (HP:0000010); Orthostatic hypotension (HP:0001278); Anhidrosis (HP:0000970); Erectile dysfunction (HP:0100639) (ortiz2024aretrospectivereview pages 1-2, finnsson2015lmnb1‐relatedautosomal‐dominantleukodystrophy pages 6-7) * Motor: Spasticity (HP:0001257); Spastic paraplegia (HP:0001258); Ataxia (HP:0001251); Tremor (HP:0001337) (ortiz2024aretrospectivereview pages 1-2, finnsson2015lmnb1‐relatedautosomal‐dominantleukodystrophy pages 9-12) * Cognitive/psychiatric: Cognitive impairment (HP:0100543); Depression (HP:0000716) (ortiz2024aretrospectivereview pages 1-2)

(These HPO IDs are suggested mappings; the retrieved sources did not explicitly list HPO codes.)

4. Genetic / molecular information

4.1 Causal gene

LMNB1 (lamin B1) is the causal gene; disease results from LMNB1 overexpression rather than canonical loss-of-function. (neri2023understandingtheultrarare pages 1-2, lin2011adultonsetautosomaldominant pages 1-2)

4.2 Pathogenic variant classes

  • Structural duplication of LMNB1 (copy-number gain), often spanning the full gene. (dai2017anlmnb1duplication pages 1-2, santos2012adultonsetautosomaldominant pages 3-3)
  • Nonrecurrent upstream deletions (regulatory structural variants) causing enhancer adoption. (giorgio2015alargegenomic pages 1-2, nmezi2019genomicdeletionsupstream pages 1-2)

4.3 Functional consequence

The convergent molecular consequence is increased Lamin B1 levels (gain-of-function by overexpression), perturbing nuclear lamina stoichiometry and downstream chromatin/transcription/splicing programs in myelin-relevant cells. (neri2023understandingtheultrarare pages 2-4, neri2023understandingtheultrarare pages 6-7)

4.4 Modifier genes / epigenetics

Direct human modifier genes were not identified in the retrieved excerpts. However, mechanistic work suggests epigenetic shifts in oligodendrocytes under LMNB1 overexpression, including increased repressive histone marks (H3K9me3, H3K27me3) and reduced activating acetylation marks (AcH3, AcH4) in aged oligodendrocytes in transgenic models. (neri2023understandingtheultrarare pages 6-7)

5. Environmental information

No specific environmental toxins, lifestyle exposures, or infectious triggers were established as causal in the retrieved literature excerpts; ADLD is best understood as genetically caused. (neri2023understandingtheultrarare pages 1-2)

6. Mechanism / pathophysiology (current understanding)

6.1 Causal chain (integrated model)

  1. Upstream trigger: LMNB1 structural variant (duplication or upstream deletion) → LMNB1 overexpression. (neri2023understandingtheultrarare pages 1-2, nmezi2019genomicdeletionsupstream pages 1-2)
  2. Nuclear lamina/chromatin effects: Lamin B1 excess disturbs nuclear lamina architecture (misshaped/folded nuclei; increased nuclear rigidity) and alters chromatin organization and transcriptional silencing at the nuclear periphery. (neri2023understandingtheultrarare pages 4-6, lin2011adultonsetautosomaldominant pages 1-2)
  3. Myelin cell dysfunction (oligodendrocyte-centered mechanisms): oligodendrocyte-targeted LMNB1 overexpression can cause premature differentiation arrest and repression of lipid synthesis pathways; in one spinal-cord transgenic model, multiple downregulated genes mapped to lipid synthesis and lipidomics showed reduced myelin lipids. (neri2023understandingtheultrarare pages 4-6)
  4. Spliceopathy and myelin gene dysregulation: LMNB1 increase is associated with upregulation of RAVER2, inhibiting PTB and contributing to abnormal splicing of PTB-target genes including PLP1, and PLP1 downregulation has been linked to reduced YY1 binding. (neri2023understandingtheultrarare pages 7-9, dai2017anlmnb1duplication pages 1-2)
  5. Non-cell-autonomous contributions (astrocytopathy): astrocyte LMNB1 accumulation can reduce LIF/LIF-R signaling and downstream PI3K/Akt/mTOR pathway activity, impairing support for oligodendrocytes; astrocytes show reduced viability and reactive changes. (neri2023understandingtheultrarare pages 6-7, neri2023understandingtheultrarare pages 7-9)
  6. Downstream tissue outcome: progressive, largely non-inflammatory CNS demyelination with vacuolated white matter and relative preservation of oligodendroglia in pathology descriptions. (lin2011adultonsetautosomaldominant pages 1-2)

6.2 Immune involvement

ADLD is generally described as lacking prominent inflammatory demyelination; neuropathology notes vacuolated white matter without significant inflammatory infiltrates, distinguishing it from autoimmune demyelination paradigms. (lin2011adultonsetautosomaldominant pages 1-2)

6.3 Oxidative stress / inflammatory signaling

Patient-derived cells show disturbed oxidative stress responses and increased ROS after oxidative challenge, and increased activation of inflammatory signaling markers (e.g., phosphorylated NF-κB) in fibroblast-based studies, though confirmation in patient CNS tissue remains an open need. (neri2023understandingtheultrarare pages 7-9)

6.4 Suggested GO biological process terms (examples)

Based on mechanisms discussed: * Chromatin organization and negative regulation of transcription (lin2011adultonsetautosomaldominant pages 1-2, neri2023understandingtheultrarare pages 6-7) * Myelination / oligodendrocyte differentiation (neri2023understandingtheultrarare pages 4-6) * Lipid biosynthetic process (myelin lipid synthesis dysregulation) (neri2023understandingtheultrarare pages 4-6) * mRNA splicing (RAVER2/PTB axis) (neri2023understandingtheultrarare pages 7-9)

(GO IDs not explicitly provided in the sources; these are suggested mappings.)

6.5 Suggested Cell Ontology (CL) terms (examples)

Key implicated cell types include: * Oligodendrocytes (myelin-producing CNS glia) (neri2023understandingtheultrarare pages 4-6, oranburg2023establishingmodelsystems pages 27-31) * Astrocytes (LIF signaling and reactive changes) (neri2023understandingtheultrarare pages 7-9) * Neurons (nuclear morphology and neurite phenotypes in models) (giorgio2019allelespecificsilencingas pages 20-23)

(CL IDs not explicitly provided; suggested mappings.)

7. Anatomical structures affected

7.1 Organ/system level

Primary: central nervous system white matter (brain and spinal cord), with prominent clinical contributions from autonomic pathways and long motor tracts. (ortiz2024aretrospectivereview pages 2-3, finnsson2015lmnb1‐relatedautosomal‐dominantleukodystrophy pages 6-7)

7.2 Tissue/cell level

Primary tissue: CNS white matter with demyelination; implicated cell types include oligodendrocytes (directly, via cell-specific overexpression models) and astrocytes (supportive signaling dysfunction). (neri2023understandingtheultrarare pages 4-6, neri2023understandingtheultrarare pages 6-7)

7.3 Subcellular

Core subcellular compartment implicated: nuclear lamina / nuclear envelope and its chromatin tethering domains. (lin2011adultonsetautosomaldominant pages 1-2)

7.4 Suggested UBERON terms (examples)

  • Brain white matter and spinal cord white matter (ortiz2024aretrospectivereview pages 2-3, finnsson2015lmnb1‐relatedautosomal‐dominantleukodystrophy pages 9-12)
  • Internal capsule and corpus callosum (ortiz2024aretrospectivereview pages 2-3)
  • Cerebellar peduncles (ortiz2024aretrospectivereview pages 2-3)

(UBERON IDs not explicitly provided; suggested mappings.)

8. Temporal development

8.1 Onset

Onset is typically insidious in mid-adulthood (often 4th–6th decade), with MRI abnormalities potentially preceding symptoms by a decade or more in some individuals. (ortiz2024aretrospectivereview pages 1-2, finnsson2015lmnb1‐relatedautosomal‐dominantleukodystrophy pages 6-7)

8.2 Progression and staging (data-supported milestones)

Longitudinal natural history in LMNB1-duplication families provides disability and survival estimates: * EDSS 6 at mean age 59 ± 8 years, about 11 ± 5 years from symptom onset. * EDSS 8 at mean age 61 ± 6 years, about 14 ± 4 years from onset. * Deaths at mean age 66 ± 6 years, about 17 ± 6 years from onset. * Median survival after onset 18 years. (finnsson2015lmnb1‐relatedautosomal‐dominantleukodystrophy pages 6-7, finnsson2015lmnb1‐relatedautosomal‐dominantleukodystrophy pages 9-12)

8.3 Remission/relapse patterns

A relapsing-remitting course is not typical; pseudoexacerbations with heat/infection can occur. (finnsson2015lmnb1‐relatedautosomal‐dominantleukodystrophy pages 9-12)

9. Inheritance and population

9.1 Inheritance

Inheritance is autosomal dominant, consistent with structural variants that increase LMNB1 expression. (gosky2021assessmentanddevelopment pages 18-22, nmezi2019genomicdeletionsupstream pages 1-2)

9.2 Epidemiology

ADLD is ultra-rare; multiple sources state that >30 families have been reported worldwide and that exact prevalence is unknown due to rarity and diagnostic challenges. (neri2023understandingtheultrarare pages 1-2, ortiz2024aretrospectivereview pages 3-5)

Educational materials summarize older literature counts as “at least 24 families” and “>70 individuals,” and emphasize likely underdiagnosis. (gosky2021assessmentanddevelopment pages 18-22)

No robust sex ratio, penetrance estimates, or population prevalence/incidence rates were identified in the retrieved excerpts. (ortiz2024aretrospectivereview pages 3-5)

10. Diagnostics

10.1 Clinical and imaging diagnostics

The practical, high-yield diagnostic pathway is: 1. Recognize the adult-onset dysautonomia + spastic-ataxic syndrome. 2. Identify the characteristic symmetric MRI pattern, including corticospinal tract involvement and cerebellar peduncle lesions; spine MRI may show cord thinning/atrophy. 3. Confirm with LMNB1 duplication/deletion testing, using methods that detect CNVs/structural variants. (ortiz2024aretrospectivereview pages 3-5, muthusamy2023adultonsetleukodystrophiesa pages 10-11)

MRI details in a 2024 cohort: all reviewed MRIs showed symmetric confluent deep cerebral and periventricular T2 hyperintensities with involvement of posterior limb internal capsule, corpus callosum, brainstem corticospinal tracts, superior/middle cerebellar peduncles, and spine MRI showed diffuse spinal cord atrophy. (ortiz2024aretrospectivereview pages 1-2, ortiz2024aretrospectivereview pages 2-3)

10.2 Genetic testing strategy

A critical real-world point from 2023–2024 expert sources is that routine short-read NGS may not reliably detect LMNB1 duplications/upstream deletions, so the clinician must order CNV/structural-variant assays (e.g., deletion/duplication analysis, MLPA, gene-targeted microarray/array-CGH) when the phenotype/MRI are classic. (muthusamy2023adultonsetleukodystrophiesa pages 21-23, ortiz2024aretrospectivereview pages 3-5)

10.3 Differential diagnosis (key examples)

Because adult leukodystrophies overlap with MS and other acquired leukoencephalopathies, reviews emphasize first excluding acquired mimics and using imaging patterns/biochemical testing to distinguish inherited conditions. (muthusamy2023adultonsetleukodystrophiesa pages 23-24, muthusamy2023adultonsetleukodystrophiesa pages 21-23)

A 2023 practical guide explicitly highlights differentials and distinguishing tests, including AMN/X-ALD (VLCFA; spinal cord atrophy), AMACR deficiency (pristanic acid), CSF1R disease (calcifications on CT/gradient-echo), and emphasizes the LMNB1 ADLD MRI signature and CNV testing needs. (muthusamy2023adultonsetleukodystrophiesa pages 10-11)

11. Outcome / prognosis

ADLD is slowly progressive but ultimately severe, with a multi-decade course in many patients. Quantified outcomes include EDSS milestone timing and survival described above (Section 8). (finnsson2015lmnb1‐relatedautosomal‐dominantleukodystrophy pages 6-7)

Diagnostic delay is substantial in real-world practice: median 6 years from symptom onset to diagnosis in one 2024 cohort. (ortiz2024aretrospectivereview pages 1-2)

12. Treatment

12.1 Current standard of care (real-world)

No established disease-modifying therapy was identified in the cited clinical literature; care is supportive/symptomatic, targeting dysautonomia (bladder and orthostatic intolerance), spasticity, mobility and functional decline, and cognitive/psychiatric symptoms. (ortiz2024aretrospectivereview pages 3-5, jiang2025casereportlmnb1 pages 4-5)

12.2 Experimental / emerging therapeutics

LMNB1-lowering strategies are the most mechanistically aligned targeted approaches:

  1. Allele-specific RNA interference (preclinical proof-of-concept). In patient fibroblasts and disease-relevant cellular models, allele-specific siRNA/shRNA targeting a common LMNB1 3′UTR SNP (rs1051644) reduced LMNB1 expression toward physiologic levels and improved ADLD-associated cellular phenotypes. In directly reprogrammed neurons, allele-specific shRNA produced ~30% Lamin B1 protein reduction with improved nuclear anomalies and neurite growth. (giorgio2019allelespecificsilencingas pages 17-20, giorgio2019allelespecificsilencingas pages 20-23)

  2. Personalized antisense oligonucleotide (ASO) therapy clinical trial (single participant). ClinicalTrials.gov lists an open-label phase 1/2 trial of a personalized ASO (nL-LMNB1-001) in a single participant with LMNB1-duplication ADLD (NCT06816498), started 2025-03-17, ACTIVE_NOT_RECRUITING; endpoints include gait metrics (6-minute walk, 25-foot walk, motion analysis), neurological functioning, MRI brain atrophy, plus urodynamics and autonomic tests for secondary outcomes. (NCT06816498 chunk 1)

12.3 Suggested MAXO terms (examples)

Not explicitly provided in sources; suggested mappings include: * Genetic counseling (autosomal dominant inheritance) (gosky2021assessmentanddevelopment pages 18-22) * Symptomatic treatment of spasticity and autonomic dysfunction (jiang2025casereportlmnb1 pages 4-5) * Antisense oligonucleotide therapy / RNA interference (investigational) (NCT06816498 chunk 1, giorgio2019allelespecificsilencingas pages 17-20)

13. Prevention

Primary prevention is not currently feasible because ADLD is a dominantly inherited genetic disorder. Prevention is best framed as: * Secondary prevention: early recognition via MRI/clinical features and confirmatory genetic testing to reduce diagnostic delay and enable anticipatory management and trial eligibility. (ortiz2024aretrospectivereview pages 3-5, muthusamy2023adultonsetleukodystrophiesa pages 21-23) * Tertiary prevention: management of complications (orthostatic hypotension, bladder dysfunction, spasticity) and supportive rehabilitation. (ortiz2024aretrospectivereview pages 2-3)

Genetic counseling is central given autosomal dominant inheritance and 50% transmission risk to offspring of an affected parent. (gosky2021assessmentanddevelopment pages 18-22)

14. Other species / natural disease

No naturally occurring veterinary ADLD analogs were identified in the retrieved evidence; the literature retrieved emphasizes engineered model systems rather than naturally occurring cross-species disease. (neri2023understandingtheultrarare pages 2-4)

15. Model organisms

Multiple model systems support mechanistic study and therapy development: * Transgenic mouse models with oligodendrocyte-specific LMNB1 overexpression (Plp1 promoter; PLP-FLAG-LMNB1) recapitulate age-dependent white matter degeneration and motor dysfunction, supporting oligodendrocytes as key vulnerability points. (oranburg2023establishingmodelsystems pages 27-31, henck2024singlecellsequencing pages 26-29) * LMNB1BAC / PLP-LMNB1Tg mice show age-dependent demyelination and neurological phenotypes (motor/cognitive/epileptic), summarized in the 2023 review. (neri2023understandingtheultrarare pages 2-4) * Human cellular models include patient-derived fibroblasts and directly reprogrammed neurons used for mechanistic assays and proof-of-concept gene silencing. (giorgio2019allelespecificsilencingas pages 17-20)

Limitations emphasized across sources: cell-type specificity remains incompletely explained, mechanistic findings vary by model, and many molecular signatures require validation in patient CNS tissue. (neri2023understandingtheultrarare pages 2-4)

Direct abstract quotes supporting key claims (from retrieved abstracts)

  • 2024 cohort definition: “LMNB1-related autosomal dominant leukodystrophy (ADLD) is a slowly progressive neurodegenerative disorder caused by overexpression of LMNB1.” (ortiz2024aretrospectivereview pages 1-2)
  • 2015 enhancer adoption mechanism: “Chromosomal rearrangements with duplication of the lamin B1 (LMNB1) gene underlie autosomal dominant adult-onset demyelinating leukodystrophy (ADLD), a rare neurological disorder in which overexpression of LMNB1 causes progressive central nervous system demyelination.” (giorgio2015alargegenomic pages 1-2)
  • 2025 trial registry summary (ClinicalTrials.gov): describes “Personalized Antisense Oligonucleotide Therapy for A Single Participant With LMNB1 Mutation Associated Autosomal Dominant Leukodystrophy (ADLD)” with endpoints including gait testing and MRI atrophy measures. (NCT06816498 chunk 1)

Notes on missing template elements

  • MONDO / Orphanet / ICD / MeSH codes: not available in the retrieved excerpts; reporting them without evidence would require direct database querying not supported by the current tool evidence set. (neri2023understandingtheultrarare pages 1-2)
  • Variant-level HGVS nomenclature, ClinVar classifications, gnomAD allele frequencies: not present in the retrieved excerpts; ADLD is primarily associated with structural variants (duplications/deletions) that often require specialized CNV assays and may not be represented uniformly in variant databases. (muthusamy2023adultonsetleukodystrophiesa pages 21-23)

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