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Reproductive Biology and Endocrinology

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Open Access 01-12-2016 | Research

ACTH-induced stress in weaned sows impairs LH receptor expression and steroidogenesis capacity in the ovary

Authors: H. S. Zhu, Z. Qian, H. L. Liu, E. D. Bao

Published in: Reproductive Biology and Endocrinology | Issue 1/2016

Abstract

Background

Stress has been proved to impair the porcine reproduction soundly. Endocrine disruption, which is closely related to the persistent follicles, is possibly one of the results of stress, although the mechanism is unclear. Since the expression of luteinizing hormone receptor (LHR) in ovarian follicular wall and concentrations of steroid hormone in follicular fluid are related to the development of persistent follicles, this study is designed to evaluate the effect of administered adrenocorticotrophic hormone (ACTH) to weaned pigs on their ovarian steroidogenesis capacity and LHR expression.

Methods

Ten multiparous sows were weaned and randomly divided into two groups (n = 5 each). Sows received 1 IU/kg ACTH (ACTH group) or saline (control group) every 8 h from days 3–9 after jugular vein intubation. Blood samples were collected throughout the experiment, and ovaries were collected after slaughter on day 10. Follicular fluid (FF) was used to determine the steroid hormone concentrations. The ovarian follicle wall was obtained and stored in liquid nitrogen to detect mRNA levels.

Results

The plasma cortisol concentration was significantly (P < 0.01) elevated after ACTH injection. The estradiol (E₂) and androstenedione (ASD) concentrations in FF were significantly lower (P < 0.05) in the ACTH group than in the control group. The LHR, 3β-hydroxysteroid dehydrogenase (3β-HSD), cytochrome P450 aromatase (P450arom), and cytochrome P450 17a-hydroxylase (P450c17) mRNA levels were significantly (P < 0.05) reduced in the ACTH group. The steroidogenic acute regulatory protein (StAR) level and cytochrome P450 side-chain cleavage (P450scc) was lower in the ACTH group than in the control group, but the difference was not statistically significant (P > 0.05). Immunostaining results revealed 3β-HSD,P450c17, and LHR expression in theca cells, and P450arom expression in granulosa cells. Immunohistochemical staining showed significant differences in the distribution of 3β-HSD, P450c17, LHR, and P450arom between the two groups.

Conclusions

These findings indicated that ACTH significantly diminished the LHR expression and steroidogenesis capacity of the ovaries of weaned sows.

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Title: ACTH-induced stress in weaned sows impairs LH receptor expression and steroidogenesis capacity in the ovary
Authors: H. S. Zhu
Z. Qian
H. L. Liu
E. D. Bao
Publication date: 01-12-2016
Publisher: BioMed Central
Published in: Reproductive Biology and Endocrinology / Issue 1/2016
Electronic ISSN: 1477-7827
DOI: https://doi.org/10.1186/s12958-016-0214-5

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ACTH-induced stress in weaned sows impairs LH receptor expression and steroidogenesis capacity in the ovary

Abstract

Background

Methods

Results

Conclusions

Keynote webinar | Spotlight on sleep in brain health

Springer Medicine

Abstract

Background

Methods

Results

Conclusions

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