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UTF1, a putative marker for spermatogonial stem cells in stallions.

Heejun Jung1, Janet F Roser2, Minjung Yoon3

  • 1Department of Animal and Biotechnology Science, Kyungpook National University, Sangju, Korea.

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|October 2, 2014
PubMed
Summary

Undifferentiated cell transcription factor 1 (UTF1) marks stallion spermatogonial stem cells (SSCs). This study identifies UTF1 expression across stallion reproductive stages, confirming its potential as an SSC marker for fertility applications.

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Area of Science:

  • Reproductive Biology
  • Cell Biology
  • Animal Science

Background:

  • Spermatogonial stem cells (SSCs) are crucial for continuous sperm production in adult males.
  • SSCs hold potential for equine fertility applications, including progeny production from geldings and treatment for infertility.
  • Undifferentiated cell transcription factor 1 (UTF1) is a known marker for undifferentiated spermatogonia in other species.

Purpose of the Study:

  • To investigate the expression pattern of UTF1 during different reproductive stages in stallions.
  • To identify the specific subpopulations of spermatogonia that express UTF1 in equine testes.

Main Methods:

  • Collection and categorization of stallion testicular samples by age (pre-pubertal, pubertal, post-pubertal, adult).
  • Western blot analysis to confirm antibody cross-reactivity.
  • Immunohistochemistry and whole mount staining to visualize UTF1 expression in germ cells and spermatogonial subpopulations.

Main Results:

  • UTF1 was highly expressed in germ cells of pre-pubertal and pubertal stallions.
  • UTF1 expression was limited to a few germ cells in the basal compartment of post-pubertal and adult stallions.
  • UTF1 was detected in various spermatogonial subpopulations (A(s), A(pr), A(al)) and single germ cells in adult stallions, but not in Sertoli or Leydig cells.

Conclusions:

  • UTF1 is expressed in undifferentiated spermatogonia in stallions.
  • The UTF1 antibody serves as a putative marker for stallion SSCs.
  • This finding supports the use of UTF1 for identifying and potentially isolating SSCs in horses for reproductive technologies.