Myotubularin Related Protein 7 is Essential for the Spermatogonial Stem Cell Homeostasis Via PI3K/AKT Signaling

Overview

Journal Cell Cycle

Specialty Cell Biology

Date 2019 Sep 4

PMID 31478454

Citations 17

Authors

Dan Zhao

Cong Shen

Tingting Gao

Hong Li

Yueshuai Guo

Feng Li

Chenchen Liu

Yuanyuan Liu

Xia Chen

Xi Zhang

Yangyang Wu

Yi Yu

Meng Lin

Yan Yuan

Xiaofang Chen

Xiaoyan Huang

Shenmin Yang

Jun Yu

Jun Zhang

Bo Zheng

Affiliations

Soon will be listed here.

Abstract

Myotubularin related protein 7 (MTMR7), a key member of the MTMR family, depicts phosphatase activity and is involved in myogenesis and tumor growth. We have previously identified MTMR7 in the proteomic profile of mouse spermatogonial stem cell (SSC) maturation and differentiation, implying that MTMR7 is associated with neonatal testicular development. In this study, to further explore the distribution and function of MTMR7 in mouse testis, we studied the effect of knockdown on neonatal testicular development by testicular and SSC culture methods. Our results revealed that MTMR7 is exclusively located in early germ cells. Deficiency of MTMR7 by morpholino in neonatal testis caused excessive SSC proliferation, which was attributable to the aberrant PI3K/AKT signaling activation. Altogether, our study demonstrates that MTMR7 maintains SSC homeostasis by inhibiting PI3K/AKT signaling activation.

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