Cell Reports (Sep 2016)

The Homeobox Transcription Factor RHOX10 Drives Mouse Spermatogonial Stem Cell Establishment

  • Hye-Won Song,
  • Anilkumar Bettegowda,
  • Blue B. Lake,
  • Adrienne H. Zhao,
  • David Skarbrevik,
  • Eric Babajanian,
  • Meena Sukhwani,
  • Eleen Y. Shum,
  • Mimi H. Phan,
  • Terra-Dawn M. Plank,
  • Marcy E. Richardson,
  • Madhuvanthi Ramaiah,
  • Vaishnavi Sridhar,
  • Dirk G. de Rooij,
  • Kyle E. Orwig,
  • Kun Zhang,
  • Miles F. Wilkinson

DOI
https://doi.org/10.1016/j.celrep.2016.08.090
Journal volume & issue
Vol. 17, no. 1
pp. 149 – 164

Abstract

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The developmental origins of most adult stem cells are poorly understood. Here, we report the identification of a transcription factor—RHOX10—critical for the initial establishment of spermatogonial stem cells (SSCs). Conditional loss of the entire 33-gene X-linked homeobox gene cluster that includes Rhox10 causes progressive spermatogenic decline, a phenotype indistinguishable from that caused by loss of only Rhox10. We demonstrate that this phenotype results from dramatically reduced SSC generation. By using a battery of approaches, including single-cell-RNA sequencing (scRNA-seq) analysis, we show that Rhox10 drives SSC generation by promoting pro-spermatogonia differentiation. Rhox10 also regulates batteries of migration genes and promotes the migration of pro-spermatogonia into the SSC niche. The identification of an X-linked homeobox gene that drives the initial generation of SSCs has implications for the evolution of X-linked gene clusters and sheds light on regulatory mechanisms influencing adult stem cell generation in general.

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