Effect of Sleeve Gastrectomy on Kisspeptin Expression in the Hypothalamus of Rats with Polycystic Ovary Syndrome

Apr 30, 2020Obesity (Silver Spring, Md.)

Sleeve Gastrectomy’s Impact on Brain Signals Controlling Reproduction in Rats with Polycystic Ovary Syndrome

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Abstract

Sleeve gastrectomy restored increased expression in the hypothalamus of model rats.

Polycystic ovary syndrome (PCOS) models showed impaired glucose tolerance, decreased insulin sensitivity, and disrupted estrous cyclicity.
Following sleeve gastrectomy, metabolic parameters associated with PCOS were normalized.
Kiss1 mRNA and Kiss1-positive neurons in the arcuate nucleus were significantly restored after sleeve gastrectomy.
Metabolic improvements were observed even without significant body weight loss in DHEA-treated rats on a standard diet.

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OBJECTIVES: The purpose of this study was to determine changes in the expression levels of (Kiss1) in the hypothalamus during the development of (PCOS) and after treatment with sleeve gastrectomy (SG).

METHODS: This study used chronic dehydroepiandrosterone (DHEA) alone and DHEA plus a high-fat diet (HFD) to generate a PCOS rat model. Subsequently, SG was performed in the animals with PCOS and the effects on glucose tolerance, insulin sensitivity, sex hormones, estrous cyclicity, adiponectin, and Kiss1 expression in the hypothalamus were investigated.

RESULTS: Impaired glucose tolerance, decreased insulin sensitivity, reduced adiponectin levels, disrupted estrous cyclicity, and elevated sex hormone levels associated with PCOS models were restored to normal following SG. In addition, SG was able to restore the increase in the expression of Kiss1 mRNA and Kiss1-positive neurons in the arcuate nucleus of rats with PCOS. Interestingly, although SG did not result in a significant loss of body weight in rats administered DHEA under a chow diet, it resulted in comparable metabolic improvements and Kiss1 expression in rats that had been administered DHEA along with an HFD.

CONCLUSIONS: The recovery of normal levels of Kiss1 expression in the hypothalamus after SG in this study suggests that Kiss1 might play an important role in the development of PCOS and its improvement by SG.

Key numbers

100%

Increase in Estrous Cyclicity

Cyclicity normalized in both DHEA and DH groups post-surgery.

Significant increase

Increase in Serum Adiponectin Levels

Notable increase observed in DHEA-treated rats after SG.

Significant decrease

Decrease in Expression

expression decreased in the arcuate nucleus after SG intervention.

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Effect of Sleeve Gastrectomy on Kisspeptin Expression in the Hypothalamus of Rats with Polycystic Ovary Syndrome

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