open access

Vol 65, No 6 (2014)
Original papers
Published online: 2014-12-31
Submitted: 2014-07-17
Accepted: 2014-09-26
Get Citation

Effect of tributyltin on the food intake and brain neuropeptide expression in rats

Keyan He, Jiliang Zhang, Zheng Chen
DOI: 10.5603/EP.2014.0068
·
Endokrynologia Polska 2014;65(6):485-490.

open access

Vol 65, No 6 (2014)
Original papers
Published online: 2014-12-31
Submitted: 2014-07-17
Accepted: 2014-09-26

Abstract

Introduction: Tributyltin (TBT) is a largely diffused environmental pollutant. Several studies have demonstrated that TBT is involved in the development of obesity. However, few studies addressing the effects of TBT on the brain neuropeptides involved in appetite and body weight homeostasis have been published.

Material and methods: Experiments were carried out on female and male Sprague-Dawley rats. Animals were exposed to TBT (0.5 μg/kg body weight) for 54 days. The hepatic triglyceride and total cholesterol were determined using commercial enzyme kits. The NPY, AgRP, POMC and CART mRNA expression in brains were quantified by real-time PCR.

Results: TBT exposure resulted in significant increases in the hepatic total cholesterol and triglyceride concentration of both male and female rats. Interestingly, increases in body weight and fat mass were only found in the TBT-treated male rats. TBT exposure also led to a significant increase in food intake by the female rats, while no change was observed in the male rats. Moreover, the neuropeptides expression was different between males and females after TBT exposure. TBT induced brain NPY expression in the female rats, and depressed brain POMC, AgRP and CART expression in the males.

Conclusions: TBT can increase food intake in female rats, which is associated with the disturbance of NPY in brains. TBT had sex-different effects on brain NPY, AgRP, POMC and CART mRNA expression, which indicates a complex neuroendocrine mechanism of TBT. (Endokrynol Pol 2014; 65 (6): 485–490)

Abstract

Introduction: Tributyltin (TBT) is a largely diffused environmental pollutant. Several studies have demonstrated that TBT is involved in the development of obesity. However, few studies addressing the effects of TBT on the brain neuropeptides involved in appetite and body weight homeostasis have been published.

Material and methods: Experiments were carried out on female and male Sprague-Dawley rats. Animals were exposed to TBT (0.5 μg/kg body weight) for 54 days. The hepatic triglyceride and total cholesterol were determined using commercial enzyme kits. The NPY, AgRP, POMC and CART mRNA expression in brains were quantified by real-time PCR.

Results: TBT exposure resulted in significant increases in the hepatic total cholesterol and triglyceride concentration of both male and female rats. Interestingly, increases in body weight and fat mass were only found in the TBT-treated male rats. TBT exposure also led to a significant increase in food intake by the female rats, while no change was observed in the male rats. Moreover, the neuropeptides expression was different between males and females after TBT exposure. TBT induced brain NPY expression in the female rats, and depressed brain POMC, AgRP and CART expression in the males.

Conclusions: TBT can increase food intake in female rats, which is associated with the disturbance of NPY in brains. TBT had sex-different effects on brain NPY, AgRP, POMC and CART mRNA expression, which indicates a complex neuroendocrine mechanism of TBT. (Endokrynol Pol 2014; 65 (6): 485–490)

Get Citation

Keywords

tributyltin; body weight; food intake; neuropeptides

About this article
Title

Effect of tributyltin on the food intake and brain neuropeptide expression in rats

Journal

Endokrynologia Polska

Issue

Vol 65, No 6 (2014)

Pages

485-490

Published online

2014-12-31

DOI

10.5603/EP.2014.0068

Bibliographic record

Endokrynologia Polska 2014;65(6):485-490.

Keywords

tributyltin
body weight
food intake
neuropeptides

Authors

Keyan He
Jiliang Zhang
Zheng Chen

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