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Updated: Sep 18, 2025

Transgenic Rodent Assay for Quantifying Male Germ Cell Mutant Frequency
Published on: August 6, 2014
TRAPPC2l Participates in Male Germ Cell Development by Regulating Cell Division
Mengyue Wang1,2, Jiayi Li3,4, Bowen Liu3,4
1State Key Laboratory of Reproductive Medicine and Offspring Health, Center for Reproductive Medicine, Institute of Women, Children and Reproductive Health, Shandong University, Jinan, China.
Transport Protein Particle complex subunit 2-like (TRAPPC2L) is crucial for male fertility. TRAPPC2L knockout mice showed abnormal germ cell development and complete infertility, highlighting its role in male germ cell maintenance.
Area of Science:
- Cell Biology
- Developmental Biology
- Genetics
Background:
- TRAPPC2L is a subunit of the Transport Protein Particle (TRAPP) complex, implicated in vesicle transport and autophagy.
- Mutations in the Trappc2l gene are linked to neurodevelopmental disorders.
Purpose of the Study:
- To investigate the role of Trappc2l in mouse development and fertility.
- To elucidate the underlying mechanisms of germ cell abnormalities in Trappc2l knockout mice.
Main Methods:
- Generation and analysis of Trappc2l knockout mice.
- Histological examination of testes at various developmental stages.
- Analysis of germ cell development and gene expression.
Main Results:
- Trappc2l knockout did not affect general development but caused complete infertility in male mice.
- Abnormal germ cell syncytia with multiple nuclei formed in knockout mice from embryonic day 17.5.
- Germ cells were lost postnatally, and syncytia formation appeared due to abnormal cell division, not fusion.
- Meiosis-associated genes (Stra8, Sycp3) were expressed in embryonic germ cells.
Conclusions:
- Trappc2l is essential for male germ cell development in mice.
- TRAPPC2L likely maintains the mitotic quiescent state of male germ cells during embryonic development.
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