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Meiotic Prophase Failure Module

Developmental biology Module meiotic_prophase_failure 8 disorders Pathograph 7
A conserved mechanism module for inherited gametogenic failure caused by disruption of meiotic prophase I chromosome synapsis and recombination. In affected germ cells, programmed meiotic chromosome events fail at homolog pairing, synaptonemal complex assembly, homologous-recombination repair of DNA double-strand breaks, or pachytene checkpoint resolution. The shared path is meiotic arrest with germ-cell apoptosis, producing sex-dimorphic clinical outcomes: ovarian follicle depletion and primary ovarian insufficiency in 46,XX individuals, and spermatogenic arrest with non-obstructive azoospermia or Sertoli-cell-only syndrome in 46,XY individuals. This module is intended for meiotic genes such as SYCE1, MCM8, MCM9, STAG3, HFM1, MSH4, MSH5, DMC1, and SYCP3. It intentionally excludes upstream gonadal organogenesis and steroidogenic transcription-factor disorders such as NR5A1, WT1, SOX9, SRY, FOXL2, and DHH.
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Pathophysiology Nodes

7
7 shared nodes are defined in this module.
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Cell Types

3
germ cell CL:0000586 Cell Ontology (CL) Relation: this mechanism module involves this cell type This mechanism module involves germ cell (CL:0000586). CL:0000586 is a cell type from the Cell Ontology. oocyte CL:0000023 Cell Ontology (CL) Relation: this mechanism module involves this cell type This mechanism module involves oocyte (CL:0000023). CL:0000023 is a cell type from the Cell Ontology. spermatocyte CL:0000017 Cell Ontology (CL) Relation: this mechanism module involves this cell type This mechanism module involves spermatocyte (CL:0000017). CL:0000017 is a cell type from the Cell Ontology.
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Biological Processes

9
meiotic cell cycle GO:0051321 Gene Ontology (GO) Relation: this mechanism module involves this biological process This mechanism module involves meiotic cell cycle (GO:0051321). GO:0051321 is a biological process from the Gene Ontology. homologous chromosome pairing at meiosis GO:0007129 Gene Ontology (GO) Relation: this mechanism module involves this biological process This mechanism module involves homologous chromosome pairing at meiosis (GO:0007129). GO:0007129 is a biological process from the Gene Ontology. synaptonemal complex assembly GO:0007130 Gene Ontology (GO) Relation: this mechanism module involves this biological process This mechanism module involves decreased synaptonemal complex assembly (GO:0007130). GO:0007130 is a biological process from the Gene Ontology. DECREASED double-strand break repair via homologous recombination GO:0000724 Gene Ontology (GO) Relation: this mechanism module involves this biological process This mechanism module involves decreased double-strand break repair via homologous recombination (GO:0000724). GO:0000724 is a biological process from the Gene Ontology. DECREASED DNA double-strand break processing GO:0000729 Gene Ontology (GO) Relation: this mechanism module involves this biological process This mechanism module involves decreased DNA double-strand break processing (GO:0000729). GO:0000729 is a biological process from the Gene Ontology. DECREASED meiotic recombination checkpoint signaling GO:0051598 Gene Ontology (GO) Relation: this mechanism module involves this biological process This mechanism module involves increased meiotic recombination checkpoint signaling (GO:0051598). GO:0051598 is a biological process from the Gene Ontology. INCREASED apoptotic process GO:0006915 Gene Ontology (GO) Relation: this mechanism module involves this biological process This mechanism module involves increased apoptotic process (GO:0006915). GO:0006915 is a biological process from the Gene Ontology. INCREASED female gamete generation GO:0007292 Gene Ontology (GO) Relation: this mechanism module involves this biological process This mechanism module involves decreased female gamete generation (GO:0007292). GO:0007292 is a biological process from the Gene Ontology. DECREASED male gamete generation GO:0048232 Gene Ontology (GO) Relation: this mechanism module involves this biological process This mechanism module involves decreased male gamete generation (GO:0048232). GO:0048232 is a biological process from the Gene Ontology. DECREASED
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Notes

This is a mechanism module, not a specific disease. Disorder entries should reference individual nodes via conforms_to using "meiotic_prophase_failure#<Node Name>". The module defines a provisional research scaffold for genes that disrupt meiotic prophase after gonadal organogenesis has occurred. Somatic DNA-repair and cancer-predisposition branches are gene-specific, especially for MCM8 and MCM9, and should not be required for every conforming disorder.
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Used By Disorder Entries

8
HFM1-related gametogenic failure via Impaired crossover formation at meiotic recombination intermediates → Homologous Recombination Repair of Meiotic DNA Breaks , Meiotic arrest and germ cell depletion → Pachytene Checkpoint Arrest and Germ Cell Apoptosis , Ovarian follicle depletion and primary ovarian insufficiency → Ovarian Follicle Depletion and Primary Ovarian Insufficiency , Spermatogenic arrest and non-obstructive azoospermia → Spermatogenic Arrest and Non-Obstructive Azoospermia
HROB-related gametogenic failure via Impaired homologous recombination → Homologous Recombination Repair of Meiotic DNA Breaks , Prophase I meiotic arrest and germ cell depletion → Pachytene Checkpoint Arrest and Germ Cell Apoptosis , Ovarian follicle depletion and primary ovarian insufficiency → Ovarian Follicle Depletion and Primary Ovarian Insufficiency , Spermatogenic arrest (predicted male branch) → Spermatogenic Arrest and Non-Obstructive Azoospermia
MCM8-related gametogenic failure via Impaired homologous recombination → Homologous Recombination Repair of Meiotic DNA Breaks , Meiotic arrest and germ cell depletion → Pachytene Checkpoint Arrest and Germ Cell Apoptosis , Ovarian follicle depletion and primary ovarian insufficiency → Ovarian Follicle Depletion and Primary Ovarian Insufficiency , Spermatogenic arrest and non-obstructive azoospermia → Spermatogenic Arrest and Non-Obstructive Azoospermia , Somatic genome instability and germ cell tumor predisposition → Somatic DNA Repair Deficiency and Cancer Predisposition
MCM9-related gametogenic failure via Impaired homologous recombination → Homologous Recombination Repair of Meiotic DNA Breaks , Somatic genome instability with polyposis and cancer predisposition → Somatic DNA Repair Deficiency and Cancer Predisposition
STAG3-related gametogenic failure via Meiotic cohesin instability and synaptonemal complex disruption → Synaptonemal Complex Assembly , Prophase I meiotic arrest and germ cell apoptosis → Pachytene Checkpoint Arrest and Germ Cell Apoptosis , Ovarian follicle depletion and primary ovarian insufficiency → Ovarian Follicle Depletion and Primary Ovarian Insufficiency , Spermatogenic arrest and non-obstructive azoospermia → Spermatogenic Arrest and Non-Obstructive Azoospermia
SYCE1-related gametogenic failure via Synaptonemal complex assembly failure → Synaptonemal Complex Assembly , Meiotic prophase I pachytene checkpoint activation → Pachytene Checkpoint Arrest and Germ Cell Apoptosis
SYCP2-related spermatogenic failure via Synaptonemal Complex Axial Element Assembly Failure → Synaptonemal Complex Assembly , Spermatogenic Failure → Spermatogenic Arrest and Non-Obstructive Azoospermia
SYCP3-related spermatogenic failure via Synaptonemal complex axial/lateral element assembly failure → Synaptonemal Complex Assembly , Pachytene-stage meiotic arrest and germ-cell apoptosis → Pachytene Checkpoint Arrest and Germ Cell Apoptosis , Non-obstructive azoospermia → Spermatogenic Arrest and Non-Obstructive Azoospermia
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Pathograph

Use the checkboxes to hide or show graph categories. Hover nodes for evidence-backed metadata.
Pathograph: causal mechanism network for Meiotic Prophase Failure Module Interactive directed graph showing how this shared module's pathophysiology nodes connect.
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Pathophysiology

7
Meiotic Prophase I Entry and Homolog Pairing
trigger
Germ cells enter the meiotic cell cycle and initiate prophase I chromosome pairing. This node captures the shared upstream context for module genes: the gonad is present, germ cells enter meiosis, and homologous chromosomes must pair before synapsis and recombination can be completed.
germ cell CL:0000586 Cell Ontology (CL) Relation: this pathophysiological event involves this cell type This pathophysiological event involves germ cell (CL:0000586). CL:0000586 is a cell type from the Cell Ontology.
meiotic cell cycle GO:0051321 Gene Ontology (GO) Relation: this pathophysiological event involves this biological process This pathophysiological event involves meiotic cell cycle (GO:0051321). GO:0051321 is a biological process from the Gene Ontology. homologous chromosome pairing at meiosis GO:0007129 Gene Ontology (GO) Relation: this pathophysiological event involves this biological process This pathophysiological event involves homologous chromosome pairing at meiosis (GO:0007129). GO:0007129 is a biological process from the Gene Ontology.
Downstream
  • Synaptonemal Complex Assembly
  • Homologous Recombination Repair of Meiotic DNA Breaks
Synaptonemal Complex Assembly
central effector
Synaptonemal complex components assemble between paired homologous chromosomes during meiotic prophase I. Disruption of central or lateral element proteins such as SYCE1 or SYCP3 produces asynapsis or unstable synapsis, preventing normal progression through pachytene.
germ cell CL:0000586 Cell Ontology (CL) Relation: this pathophysiological event involves this cell type This pathophysiological event involves germ cell (CL:0000586). CL:0000586 is a cell type from the Cell Ontology.
synaptonemal complex assembly GO:0007130 Gene Ontology (GO) Relation: this pathophysiological event involves this biological process This pathophysiological event involves decreased synaptonemal complex assembly (GO:0007130). GO:0007130 is a biological process from the Gene Ontology. DECREASED
Used by disorders
STAG3-related gametogenic failure as Meiotic cohesin instability and synaptonemal complex disruption
SYCE1-related gametogenic failure as Synaptonemal complex assembly failure
SYCP2-related spermatogenic failure as Synaptonemal Complex Axial Element Assembly Failure
SYCP3-related spermatogenic failure as Synaptonemal complex axial/lateral element assembly failure
Downstream
  • Pachytene Checkpoint Arrest and Germ Cell Apoptosis
Homologous Recombination Repair of Meiotic DNA Breaks
central effector
Programmed and repair-associated DNA breaks in meiotic prophase require homologous-recombination machinery to complete chromosome pairing, crossover formation, and genome integrity surveillance. Disruption of repair factors such as MCM8, MCM9, DMC1, HFM1, MSH4, or MSH5 leaves meiotic DNA damage unresolved and blocks normal pachytene progression.
germ cell CL:0000586 Cell Ontology (CL) Relation: this pathophysiological event involves this cell type This pathophysiological event involves germ cell (CL:0000586). CL:0000586 is a cell type from the Cell Ontology.
double-strand break repair via homologous recombination GO:0000724 Gene Ontology (GO) Relation: this pathophysiological event involves this biological process This pathophysiological event involves decreased double-strand break repair via homologous recombination (GO:0000724). GO:0000724 is a biological process from the Gene Ontology. DECREASED DNA double-strand break processing GO:0000729 Gene Ontology (GO) Relation: this pathophysiological event involves this biological process This pathophysiological event involves decreased DNA double-strand break processing (GO:0000729). GO:0000729 is a biological process from the Gene Ontology. DECREASED
Used by disorders
HFM1-related gametogenic failure as Impaired crossover formation at meiotic recombination intermediates
HROB-related gametogenic failure as Impaired homologous recombination
MCM8-related gametogenic failure as Impaired homologous recombination
MCM9-related gametogenic failure as Impaired homologous recombination
Downstream
  • Pachytene Checkpoint Arrest and Germ Cell Apoptosis
  • Somatic DNA Repair Deficiency and Cancer Predisposition
Pachytene Checkpoint Arrest and Germ Cell Apoptosis
consequence
Failed synapsis or unresolved meiotic recombination activates pachytene checkpoint signaling. Instead of completing meiotic prophase and producing functional gametes, affected germ cells arrest and are eliminated by apoptosis.
germ cell CL:0000586 Cell Ontology (CL) Relation: this pathophysiological event involves this cell type This pathophysiological event involves germ cell (CL:0000586). CL:0000586 is a cell type from the Cell Ontology.
meiotic recombination checkpoint signaling GO:0051598 Gene Ontology (GO) Relation: this pathophysiological event involves this biological process This pathophysiological event involves increased meiotic recombination checkpoint signaling (GO:0051598). GO:0051598 is a biological process from the Gene Ontology. INCREASED apoptotic process GO:0006915 Gene Ontology (GO) Relation: this pathophysiological event involves this biological process This pathophysiological event involves increased apoptotic process (GO:0006915). GO:0006915 is a biological process from the Gene Ontology. INCREASED
Used by disorders
HFM1-related gametogenic failure as Meiotic arrest and germ cell depletion
HROB-related gametogenic failure as Prophase I meiotic arrest and germ cell depletion
MCM8-related gametogenic failure as Meiotic arrest and germ cell depletion
STAG3-related gametogenic failure as Prophase I meiotic arrest and germ cell apoptosis
SYCE1-related gametogenic failure as Meiotic prophase I pachytene checkpoint activation
SYCP3-related spermatogenic failure as Pachytene-stage meiotic arrest and germ-cell apoptosis
Downstream
  • Ovarian Follicle Depletion and Primary Ovarian Insufficiency
  • Spermatogenic Arrest and Non-Obstructive Azoospermia
Ovarian Follicle Depletion and Primary Ovarian Insufficiency
consequence
In 46,XX individuals, loss of oocytes during fetal or early postnatal meiotic progression depletes the ovarian follicle pool. The clinical manifestation is primary ovarian insufficiency, ovarian dysgenesis, primary amenorrhea, or hypergonadotropic hypogonadism depending on ascertainment and residual ovarian reserve.
oocyte CL:0000023 Cell Ontology (CL) Relation: this pathophysiological event involves this cell type This pathophysiological event involves oocyte (CL:0000023). CL:0000023 is a cell type from the Cell Ontology.
female gamete generation GO:0007292 Gene Ontology (GO) Relation: this pathophysiological event involves this biological process This pathophysiological event involves decreased female gamete generation (GO:0007292). GO:0007292 is a biological process from the Gene Ontology. DECREASED
Used by disorders
HFM1-related gametogenic failure as Ovarian follicle depletion and primary ovarian insufficiency
HROB-related gametogenic failure as Ovarian follicle depletion and primary ovarian insufficiency
MCM8-related gametogenic failure as Ovarian follicle depletion and primary ovarian insufficiency
STAG3-related gametogenic failure as Ovarian follicle depletion and primary ovarian insufficiency
Spermatogenic Arrest and Non-Obstructive Azoospermia
consequence
In 46,XY individuals, meiotic prophase failure in spermatocytes produces spermatogenic arrest, often observed clinically as non-obstructive azoospermia, maturation arrest, or Sertoli-cell-only syndrome after germ cell depletion.
spermatocyte CL:0000017 Cell Ontology (CL) Relation: this pathophysiological event involves this cell type This pathophysiological event involves spermatocyte (CL:0000017). CL:0000017 is a cell type from the Cell Ontology.
male gamete generation GO:0048232 Gene Ontology (GO) Relation: this pathophysiological event involves this biological process This pathophysiological event involves decreased male gamete generation (GO:0048232). GO:0048232 is a biological process from the Gene Ontology. DECREASED
Used by disorders
HFM1-related gametogenic failure as Spermatogenic arrest and non-obstructive azoospermia
HROB-related gametogenic failure as Spermatogenic arrest (predicted male branch)
MCM8-related gametogenic failure as Spermatogenic arrest and non-obstructive azoospermia
STAG3-related gametogenic failure as Spermatogenic arrest and non-obstructive azoospermia
SYCP2-related spermatogenic failure as Spermatogenic Failure
SYCP3-related spermatogenic failure as Non-obstructive azoospermia
Somatic DNA Repair Deficiency and Cancer Predisposition
gene specific consequence
A gene-specific branch for module genes that also function in mitotic or somatic DNA repair. MCM8 and MCM9 are the main current examples: biallelic variants may combine meiotic prophase failure with germ-cell tumors or gastrointestinal polyposis and early-onset malignancy. This branch should be used only when gene-specific evidence supports a somatic cancer phenotype.
double-strand break repair via homologous recombination GO:0000724 Gene Ontology (GO) Relation: this pathophysiological event involves this biological process This pathophysiological event involves decreased double-strand break repair via homologous recombination (GO:0000724). GO:0000724 is a biological process from the Gene Ontology. DECREASED
Used by disorders
MCM8-related gametogenic failure as Somatic genome instability and germ cell tumor predisposition
MCM9-related gametogenic failure as Somatic genome instability with polyposis and cancer predisposition