A role of KIT receptor signaling for proliferation and differentiation of rat stem Leydig cells in vitro

Shiwen Liu, Xiaomin Chen, Yiyan Wang, Linxi Li, Guimin Wang, Xiaoheng Li, Haolin Chen, Jingjing Guo, Han Lin, Qing Quan Lian, Ren Shan Ge

Research output: Contribution to journalArticlepeer-review

Abstract

In the testis, KIT ligand (KITL, also called stem cell factor) is expressed by Sertoli cells and its receptor (c-kit, KIT) is expressed by spermatogonia and Leydig cells. Although KITL-KIT signaling is critical for the spermatogenesis, its roles in Leydig cell development during puberty are not clear. In the present study, we investigated effects of KITL on stem Leydig cell proliferation and differentiation. Using an in vitro culture system of seminiferous tubules from Leydig cell-depleted testis, we found that KITL increased the proliferation activity of putative stem Leydig cells at higher concentration (10 and 100 ng/ml). Low concentration (1 ng/ml) of KITL significantly induced the differentiation of stem Leydig cells via increasing the expression level of steroidogenic acute regulatory protein (Star). In contrast, higher concentration (100 ng/ml) of KITL inhibited the differentiation of stem Leydig cells via inhibiting the steroidogenic enzyme (Cyp11a1, Cyp17a1, and Hsd17b3) expression levels. We cultured rat progenitor Leydig cells with KITL for 48 h and did not find any influence of KITL on the proliferation and androgen production of these cells. In conclusion, KITL is a growth factor that regulates the development of the stem Leydig cell.

Original languageEnglish (US)
Pages (from-to)1-8
Number of pages8
JournalMolecular and Cellular Endocrinology
Volume444
DOIs
StatePublished - Mar 15 2017
Externally publishedYes

Keywords

  • Differentiation
  • KITL
  • Proliferation
  • Stem leydig cells
  • Testosterone

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Endocrinology

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