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miR-26a-5p Regulates TNRC6A Expression and Facilitates Theca Cell Proliferation in Chicken Ovarian Follicles.

Authors
  • Kang, Li1
  • Yang, Chunhong1
  • Wu, Haizhen1
  • Chen, Qiuyue1
  • Huang, Libo1
  • Li, Xianyao1
  • Tang, Hui1
  • Jiang, Yunliang1
  • 1 Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University , Taian, People's Republic of China . , (China)
Type
Published Article
Journal
DNA and Cell Biology
Publisher
Mary Ann Liebert
Publication Date
Nov 01, 2017
Volume
36
Issue
11
Pages
922–929
Identifiers
DOI: 10.1089/dna.2017.3863
PMID: 28876086
Source
Medline
Keywords
License
Unknown

Abstract

Ovarian theca cells play an indispensable role in ovarian follicular development and hormone secretion. miR-26a-5p was reported to be differentially expressed in mature and immature chicken ovaries in our previous study; however, the role of miR-26a-5p in regulating ovarian follicle function is still unclear. In this study, we demonstrated that the expression dynamics of TNRC6A mRNA in either chicken ovaries or follicles showed an opposite trend compared with that of chicken miR-26a-5p expression. miR-26a-5p inhibited TNRC6A mRNA expression by directly targeting its 3'-untranslated region in cultured chicken theca cells. Overexpression of miR-26a-5p promoted chicken follicular theca cell proliferation in vitro. Furthermore, overexpression of miR-26a-5p and knockdown of TNRC6A significantly upregulated the antiapoptotic BCL-2 gene. Taken together, this study revealed the expression dynamics of miR-26a-5p and TNRC6A in chicken ovaries and ovarian follicles and the relationship between the expression of miR-26a-5p and TNRC6A in chicken ovarian theca cells. These results suggest that miR-26a-5p facilitates chicken ovarian theca cell proliferation by targeting the TNRC6A gene.

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