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2015 ; 2015
(ä): 925691
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Paracrine Regulation of Steroidogenesis in Theca Cells by Granulosa Cells Derived
from Mouse Preantral Follicles
#MMPMID26357661
Liu X
; Qiao P
; Jiang A
; Jiang J
; Han H
; Wang L
; Ren C
Biomed Res Int
2015[]; 2015
(ä): 925691
PMID26357661
show ga
Interaction partners of follicular cells play a significant role in
steroidogenesis, follicular formation, and development. Androgen secreted by
theca cells (TCs) can initiate follicle development and ovulation and provide
precursor materials for estrogen synthesis. Therefore, studies on ovarian
microenvironment will not only lead to better understanding of the
steroidogenesis but also have clinical significance for ovarian endocrine
abnormalities such as hyperandrogenism in polycystic ovary syndrome (PCOS). This
study applied the Transwell coculture model to investigate if the interaction
between granulosa and theca cells may affect androgen production in theca cells.
Concentrations of testosterone and androstenedione in the spent medium were
measured by radioimmunoassay and enzyme linked immunosorbent assay, respectively.
The results show that the coculture with granulosa cells (GCs) increases
steroidogenesis in TCs. In addition, testosterone and androstenedione productions
in response to LH stimulation were also increased in the coculture model.
Significantly increased mRNA expressions of steroidogenic enzymes (Star, Cyp11a1,
Cyp17a1, and Hsd3b2) were observed in the cocultured TCs. Thus, GCs were capable
of promoting steroidogenesis and LH responsiveness in TCs. This study provided a
basis for further exploration of ovarian endocrine mechanism and pathologies.