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Mechanism underlying the stimulation by IGF-1 of LHCGR expression in porcine granulosa cells.
- Source :
-
Theriogenology . Jul2021, Vol. 169, p56-64. 9p. - Publication Year :
- 2021
-
Abstract
- IGF-1 plays important roles in mammalian fertility by promoting cell growth and increasing steroid hormone secretion. Although IGF-1 significantly upregulated luteinizing hormone/choriogonadotropin receptor (LHCGR) gene expression in granulosa cells in a previous study, the mechanism was unclear. The present experiment was designed to primarily explore the regulation of LHCGR expression by IGF-1. First, based on a porcine LHCGR double-luciferase reporter experiment, c-Fos significantly inhibited the activity of the LHCGR promoter. Second, porcine granulosa cells were cultured in vitro with IGF-1, and we observed that the expression of LHCGR was significantly increased and the expression of c-Fos mRNA significantly reduced. After c-Fos overexpression in granulosa cells, IGF-1 attenuated the inhibitory effect of c-Fos on LHCGR. Furthermore, the level of LHCGR mRNA stimulated by IGF-1 in the presence of SB203580 was markedly lower than that of IGF-1 alone action. In conclusion, IGF-1 enhanced the expression of LHCGR by regulating c-Fos in granulosa cells, which may be mediated by the p38MAPK-signaling pathway. • c-Fos significantly inhibited the activity of the LHCGR promoter. • IGF-1 promoted the expression of LHCGR gene by suppressing c-Fos. • IGF-1 may regulate c-Fos through the p38MAPK-signaling pathway, consequently influencing the expression of LHCGR. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 0093691X
- Volume :
- 169
- Database :
- Academic Search Index
- Journal :
- Theriogenology
- Publication Type :
- Academic Journal
- Accession number :
- 150208418
- Full Text :
- https://doi.org/10.1016/j.theriogenology.2021.04.011