Mouse
Tspyl5 promotes spermatogonia proliferation through enhancing
Pcna-mediated DNA replication.
Reprod Fertil Dev 2024;
36:RD23042. [PMID:
38185096 DOI:
10.1071/rd23042]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Accepted: 12/07/2023] [Indexed: 01/09/2024] Open
Abstract
CONTEXT
The human TSPY1 (testis-specific protein, Y-linked 1) gene is critical for spermatogenesis and male fertility. However, there have been difficulties with studying the mechanism underlying its function, partly due to the presence of the Tspy1 pseudogene in mice.
AIMS
TSPYL5 (TSPY-like 5), an autosomal homologous gene of TSPY1 showing a similar expression pattern in both human and mouse testes, is also speculated to play a role in male spermatogenesis. It is beneficial to understand the role of TSPY1 in spermatogenesis by investigating Tspyl5 functions.
METHODS
Tspyl5 -knockout mice were generated to investigate the effect of TSPYL5 knockout on spermatogenesis.
KEY RESULTS
Tspyl5 deficiency caused a decline in fertility and decreased the numbers of spermatogonia and spermatozoa in aged male mice. Trancriptomic detection of spermatogonia derived from aged Tspyl5 -knockout mice revealed that the Pcna -mediated DNA replication pathway was downregulated. Furthermore, Tspyl5 was proven to facilitate spermatogonia proliferation and upregulate Pcna expression by promoting the ubiquitination-degradation of the TRP53 protein.
CONCLUSIONS
Our findings suggest that Tspyl5 is a positive regulator for the maintenance of the spermatogonia pool by enhancing Pcna -mediated DNA replication.
IMPLICATIONS
This observation provides an important clue for further investigation of the spermatogenesis-related function of TSPY1 .
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