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Reproductive Biology and Endocrinology
Published in: Reproductive Biology and Endocrinology 1/2013

Open Access 01-12-2013 | Research

Effects of resistin on porcine ovarian follicle steroidogenesis in prepubertal animals: an in vitro study

Authors: Agnieszka Rak-Mardyła, Martyna Durak, Ewa Łucja Gregoraszczuk

Published in: Reproductive Biology and Endocrinology | Issue 1/2013

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Abstract

Background

Resistin was first reported to be an adipocyte-specific hormone, but recent studies have indicated a connection between resistin and reproductive function. However, it is not yet known if resistin is expressed by the ovary and if it can affect steroidogenesis in ovarian follicles from prepubertal pigs.

Methods

In this study, using real time PCR, immunoblotting, and ELISA, we quantified resistin expression and concentration in maturing ovarian follicles (small, 3–4 mm; medium, 4–5 mm; large, 6–7 mm) collected from prepubertal pigs. In addition, the dose-responsive effects of recombinant human resistin (0.1, 1, 10, and 100 ng/ml) on steroid hormone (i.e., progesterone [P4], androstendione [A4], testosterone [T], and estradiol [E2]) secretion in culture medium and steroidogenic enzyme (i.e., CYP11A1, 3betaHSD, CYP17A1, 17betaHSD, and CYP19A1) expression in ovarian follicles were determined.

Results

We observed that resistin gene and protein expression increased significantly (P < 0.05) during follicular growth, with large follicles expressing the highest level of this adipokine. Recombinant resistin also increased P4, A4, and T secretion by up-regulating the steady state levels of CYP11A1, 3betaHSD, CYP17A1, and 17betaHSD. Recombinant resistin had no effects on E2 secretion and CYP19A1 expression in ovarian follicles.

Conclusion

Our results show resistin expression in ovarian follicles from prepubertal pigs for the first time. We also show that recombinant resistin stimulates steroidogenesis in ovarian follicles by increasing the expression of CYP11A1, 3betaHSD, CYP17A1, and 17betaHSD. The presence of resistin in the porcine ovary and its direct effects on steroidogenesis suggest that resistin is a new regulator of ovary function in prepubertal animals.
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Metadata
Title
Effects of resistin on porcine ovarian follicle steroidogenesis in prepubertal animals: an in vitro study
Authors
Agnieszka Rak-Mardyła
Martyna Durak
Ewa Łucja Gregoraszczuk
Publication date
01-12-2013
Publisher
BioMed Central
Published in
Reproductive Biology and Endocrinology / Issue 1/2013
Electronic ISSN: 1477-7827
DOI
https://doi.org/10.1186/1477-7827-11-45

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