Expression and effect of NAMPT (visfatin) on progesterone secretion in hen granulosa cells

被引:35
作者
Diot, Melodie [1 ,2 ,3 ,4 ]
Reverchon, Maxime [1 ,2 ,3 ,4 ]
Rame, Christelle [1 ,2 ,3 ,4 ]
Baumard, Yannick [5 ]
Dupont, Joelle [1 ,2 ,3 ,4 ]
机构
[1] INRA, Physiol Reprod & Comportements UMR85, F-37380 Nouzilly, France
[2] CNRS, UMR7247, F-37380 Nouzilly, France
[3] Univ Tours, F-37000 Tours, France
[4] IFCE, F-37380 Nouzilly, France
[5] INRA, UE 1295, Unite Expt Experimentat Avicole Tours, F-37380 Nouzilly, France
关键词
NICOTINAMIDE PHOSPHORIBOSYLTRANSFERASE; PROTEIN; RAT; CHICKEN; STEROIDOGENESIS; GENE; NAMPT/PBEF/VISFATIN; BIOSYNTHESIS; ADIPONECTIN; INVOLVEMENT;
D O I
10.1530/REP-15-0021
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
In mammals, nicotinamide phosphoribosyltransferase (NAMPT) is an adipokine produced by adipose tissue that is found in intracellular and extracellular compartments. The intracellular form of NAMPT is a nicotinamide phosphoribosyltransferase, whereas the extracellular form is considered an adipokine. In humans, NAMPT regulates energy metabolism and reproductive functions, such as ovarian steroidogenesis. To date, no study has investigated the role of NAMPT in hen ovaries. We investigated whether NAMPT is present in hen ovarian follicles and its role in granulosa cells. Using RT-PCR, western blotting and immunocytochemistry, we detected mRNA transcripts and proteins related to NAMPT in theca and granulosa cells from pre-ovulatory follicles. Using RT-PCR, we demonstrated that mRNA NAMPT levels were higher in granulosa cells than they were in theca cells and that during follicle development, theca cell levels decreased, whereas levels remained unchanged in granulosa cells. NAMPT protein quantities were significantly higher in theca cells than they were in granulosa cells, but they were unchanged during follicular development. Plasma NAMPT levels, as determined by ELISA and immunoblotting, were significantly lower in adult hens than they were in juveniles. In vitro, treatment with human recombinant NAMPT (100 ng/ml, 48 h) halved basal and IGF1-induced progesterone secretion, and this was associated with a reduction in STAR and HSD3B protein levels and MAPK3/1 phosphorylation levels in granulosa cells. These effects were abolished by the addition of FK866, a specific inhibitor of NAMPT enzymatic activity. Moreover, NAMPT had no effect on granulosa cell proliferation. In conclusion, NAMPT is present in hen ovarian cells and inhibits progesterone production in granulosa cells.
引用
收藏
页码:53 / 63
页数:11
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