MAX controls meiotic entry in sexually undifferentiated germ cells

Meiosis is a specialized type of cell division that occurs physiologically only in germ cells. We previously demonstrated that MYC-associated factor X (MAX) blocks the ectopic onset of meiosis in embryonic and germline stem cells in culture systems. Here, we investigated the Max gene’s role in mouse...

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Bibliographic Details
Published in:Scientific reports 2024-03, Vol.14 (1), p.5236-5236, Article 5236
Main Authors: Suzuki, Ayumu, Uranishi, Kousuke, Nishimoto, Masazumi, Mizuno, Yosuke, Mizuno, Seiya, Takahashi, Satoru, Eisenman, Robert N., Okuda, Akihiko
Format: Article
Language:English
Subjects:
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Apoptosis
Cell culture
Cell division
Coagulation factors
Embryo cells
Females
Gametogenesis
Gene expression
Germ cell
Germ cells
Humanities and Social Sciences
MAX
MAX gene
Max protein
Meiosis
multidisciplinary
Myc protein
Physiology
PRC1
Science
Science (multidisciplinary)
Sexual differentiation
Somatic cells
Stem cells
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Summary:Meiosis is a specialized type of cell division that occurs physiologically only in germ cells. We previously demonstrated that MYC-associated factor X (MAX) blocks the ectopic onset of meiosis in embryonic and germline stem cells in culture systems. Here, we investigated the Max gene’s role in mouse primordial germ cells. Although Max is generally ubiquitously expressed, we revealed that sexually undifferentiated male and female germ cells had abundant MAX protein because of their higher Max gene expression than somatic cells. Moreover, our data revealed that this high MAX protein level in female germ cells declined significantly around physiological meiotic onset. Max disruption in sexually undifferentiated germ cells led to ectopic and precocious expression of meiosis-related genes, including Meiosin , the gatekeeper of meiotic onset, in both male and female germ cells. However, Max -null male and female germ cells did not complete the entire meiotic process, but stalled during its early stages and were eventually eliminated by apoptosis. Additionally, our meta-analyses identified a regulatory region that supports the high Max expression in sexually undifferentiated male and female germ cells. These results indicate the strong connection between the Max gene and physiological onset of meiosis in vivo through dynamic alteration of its expression.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-024-55506-7