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Diverse roles for CDK-associated activity during spermatogenesis

Nathan Palmer1,2, S Zakiah A Talib1, Philipp Kaldis1,2,3

  • 1Institute of Molecular and Cell Biology (IMCB), A*STAR (Agency for Science, Technology and Research), Singapore, Singapore.

FEBS Letters
|October 1, 2019
PubMed

Insights

Cyclin-dependent kinases (CDKs) are vital for cell division and fertility. This review highlights their specific roles in meiosis and gamete formation, crucial for reproductive success.

Area of Science:

  • Cell Biology
  • Reproductive Biology
  • Molecular Biology

Background:

  • Cyclin-dependent kinases (CDKs) complexed with cyclins drive mitotic cell division.
  • This process is essential for stem cell proliferation and differentiation in reproductive organs, generating cells for meiosis.
  • CDKs also have critical, meiosis-specific roles in gamete production.

Purpose of the Study:

  • To review the diverse functions of CDKs, their activators, and regulators during gametogenesis.
  • To highlight the importance of CDK functions in male germ cell development (spermatogenesis).
  • To emphasize the intricate cell cycle control required for normal meiotic progression.

Main Methods:

  • Review of existing literature on CDK functions in meiosis.
  • Focus on male germ cell development (spermatogenesis) as a model system.
  • Analysis of meiotic defects arising from the deletion of CDK-related proteins.

Main Results:

  • Several CDKs exhibit meiosis-specific functions essential for the two reductional meiotic divisions.
  • Meiosis-specific functions are mediated by known CDK/cyclin complexes and specific regulators.
  • Most observed meiotic defects occur during prophase I, indicating critical roles in this stage.
  • Lack of redundancy in meiotic arrest phenotypes suggests precise CDK regulation is necessary.

Conclusions:

  • CDKs play diverse and essential roles throughout gametogenesis, beyond their canonical mitotic functions.
  • Specific CDK/cyclin complexes and regulators are crucial for successful meiotic progression.
  • Understanding these roles is key to addressing infertility and improving reproductive outcomes.
Keywords:
cyclincyclin-dependent kinasemeiosismeiotic crossoverrecombinationsynapsis

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