CDKN2AIP is Critical for Spermiogenesis and Germ Cell Development

Overview

Journal Cell Biosci

Publisher Biomed Central

Specialty Biology

Date 2022 Aug 21

PMID 35989335

Authors

Yuming Cao

Qi Sun

Zhenlie Chen

Jing Lu

Ting Geng

Ling Ma

Yuanzhen Zhang

Affiliations

Soon will be listed here.

Abstract

Background: As a member of RNA-binding protein, CDKN2AIP has been shown to play a critical role in stem cell pluripotency and somatic differentiation. Recent studies indicate that Cdkn2aip is essential for spermatogonial self-renewal and proliferation through the activating Wnt-signaling pathway. However, the mechanisms of how Cdkn2aip regulate spermatogenesis is poorly characterized.

Results: We discovered that the CDKN2AIP was expressed in spermatocyte as well as spermatids and participated in spermiogenesis. Cdkn2aip mice exhibited multiple sperm head defects accompanied by age dependent germ cell loss that might be result of protamine replacement failure and impaired SUN1 expression. Loss of Cdkn2aip expression in male mice resulted in synapsis failure in 19% of all spermatocytes and increased apoptosis due to damaged DNA double-strand break (DSB) repair and crossover formation. In vitro, knockdown of Cdkn2aip was associated with extended S phase, increased DNA damage and apoptosis.

Conclusions: Our findings not only identified the importance of CDKN2AIP in spermiogenesis and germ cell development, but also provided insight upon the driving mechanism.

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