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Identification of EOMES-expressing Spermatogonial Stem Cells and Their Regulation by PLZF

Overview
Journal Elife
Specialty Biology
Date 2019 Jun 1
PMID 31149899
Citations 33
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Abstract

Long-term maintenance of spermatogenesis in mammals is supported by GDNF, an essential growth factor required for spermatogonial stem cell (SSC) self-renewal. Exploiting a transgenic GDNF overexpression model, which expands and normalizes the pool of undifferentiated spermatogonia between and mice, we used RNAseq to identify a rare subpopulation of cells that express EOMES, a T-box transcription factor. Lineage tracing and busulfan challenge show that these are SSCs that contribute to steady state spermatogenesis as well as regeneration following chemical injury. EOMES+ SSCs have a lower proliferation index in wild-type than in mice, suggesting that PLZF regulates their proliferative activity and that EOMES+ SSCs are lost through proliferative exhaustion in mice. Single cell RNA sequencing of EOMES+ cells from and mice support the conclusion that SSCs are hierarchical yet heterogeneous.

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