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IGSF11 is required for pericentric heterochromatin dissociation during meiotic diplotene
Bo Chen1, Gengzhen Zhu2,3, An Yan1
1Center for Stem Cell Biology and Regenerative Medicine, Department of Basic Medical Sciences, School of Medicine, Tsinghua University, Beijing, China.
Plos Genetics
|September 7, 2021
Summary
The adhesion molecule IGSF11 is crucial for male fertility. Its absence in germ and somatic cells disrupts chromosome organization during meiosis, leading to infertility in mice.
Area of Science:
- Reproductive Biology
- Cell Biology
- Genetics
Background:
- Meiosis initiation and progression depend on germ and somatic cell interactions.
- Genes and proteins mediating these interactions are largely unknown.
- Understanding these connections is vital for reproductive health.
Purpose of the Study:
- To investigate the role of adhesion molecule IGSF11 in regulating meiosis.
- To determine the requirement of IGSF11 in both germ and somatic cells for male fertility.
- To elucidate the molecular mechanisms underlying IGSF11-mediated meiotic regulation.
Main Methods:
- Generated mice deficient for IGSF11.
- Utilized a novel meiotic fluorescent reporter system.
- Employed testicular cell transplantation and Hi-C analysis.
Main Results:
- IGSF11 deficiency in mice causes male infertility.
- IGSF11 is essential in both somatic and spermatogenic cells for primary spermatocyte development.
- Absence of IGSF11 leads to persistent pericentric heterochromatin clustering and increased interchromosomal interactions.
Conclusions:
- IGSF11 is a critical regulator of male meiosis.
- Somatic and germ cell expression of IGSF11 is required for proper chromosome dynamics.
- IGSF11 facilitates pericentric heterochromatin dissociation, ensuring successful meiotic progression.
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