Abstract
Granulosa cells (GCs) and theca cells (TCs) are the main components of follicles, and the interactions between GCs and TCs play a significant role in steroidogenesis, follicular growth, and atresia. However, the effects of GCs in the form of conditioned medium on steroidogenesis in buffalo TCs remain unclear. In the present study, the impacts of GC-conditioned medium (GCCM) on androgen synthesis in buffalo TCs were examined. The results showed that GCCM collected at 48 h promoted both the expression levels of androgen synthesis-related genes (CYP11A1, CYP17A1, 3β-HSD, and Star) and the secretion levels of testosterone in TCs. The treatment time of 48 h in GCCM improved both the expression levels of androgen synthesis-related genes (CYP11A1, CYP17A1, 3β-HSD, and Star) and the secretion levels of testosterone in TCs. Furthermore, GCCM that was collected at 48 h and applied to TCs for 48 h (48 h and 48 h) promoted the sensitivity of buffalo TCs to LH. This study indicated that GCCM (48 h and 48 h) enhanced the steroidogenic competence of TCs mainly through facilitating the responsiveness of TCs to LH in buffalo. This study provides a basis for further exploration of interactions between GCs and TCs for steroidogenesis in the ovary.
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