alexa Leptin and Cerulenin Differently Regulate Adiponectin Gene Expression in Chicken Liver and Hypothalamus
ISSN: 1948-5948

Journal of Microbial & Biochemical Technology
Open Access

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Research Article

Leptin and Cerulenin Differently Regulate Adiponectin Gene Expression in Chicken Liver and Hypothalamus

Petra Sintubin1, Eddy Decuypere1, Johan Buyse1, Arieh Gertler2 Rebekah Whitfield3 and Sami Dridi1,4*

1Laboratory of Physiology, Immunology, and Genetics of Domestic Animals, KU Leuven, 3001 Heverlee, Belgium.

2Institute of Biochemistry, Food Science and Nutrition, Faculty of Agriculture, The Hebrew University, Rehovot 76100, Israel.

337 Oak Hill Rd, Wayland, MA 01778

4University of Kentucky, College of Medicine, Bosomworth HSRB Rm 252, 1095 VA Drive, Lexington KY 40536, USA

*Corresponding Author:
Dr. Sami Dridi
University of Kentucky
College of Medicine
Bosomworth HSRB Rm 252
1095 VA Drive, Lexington KY 40536, USA
Tel: 859-257-3902
Fax: 859-257-2317
E-mail: [email protected]

Received Date: September 09, 2011; Accepted Date: October 25, 2011; Published Date: October 28, 2011

Citation: Sintubin P, Decuypere E, Buyse J, Gertler A, Whitfield R, et al. (2011) Leptin and Cerulenin Differently Regulate Adiponectin Gene Expression in Chicken Liver and Hypothalamus. J Microbial Biochem Technol 3: 067-072. doi: 10.4172/1948-5948.1000054

Copyright: © 2011 Sintubin P, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

Adiponectin and leptin are two adipocytokines originally found to be secreted mainly by white adipose tissue (AT) in mammals. They are involved in the control of energy homeostasis, body weight, lipid metabolism, and insulin sensitivity. The interplay between these two hormones was exclusively studied in mammals and yielded conflicting results. In birds, adiponectin and leptin are expressed not only in AT, but also in liver (for leptin) and in a wide range of tissues (for adiponectin). However, their physiological roles and relationship are still unknown. The aim of the present study was to investigate the effect of recombinant chicken leptin on adiponectin gene expression in three metabolically important tissues (liver, hypothalamus, and muscle). The effect of gender and cerulenin, the natural fatty acid synthase inhibitor which has been shown to share some molecular mediators with leptin, were also evaluated. Females exhibited significantly (P<0.05) higher levels of adiponectin mRNA in muscle and the liver, but not in the hypothalamus compared to male broiler chickens. Regardless of gender, muscle was found to contain the highest amount of adiponectin mRNA followed by the liver and hypothalamus. Continuous infusion of leptin (8 μg/ kg/h) for 6h in 3-wk-old broiler chickens significantly (P<0.05) increased plasma leptin levels, reduced food intake, and downreglated adiponectin gene expression in liver and muscle compared to the control. Cerulenin treatment (15 mg/ml) at different times significantly (P<0.05) reduced food intake. These changes were accompanied by significant (P<0.05) upregulation of hepatic adiponectin gene expression. Hypothalamic and muscle adiponectin mRNA abundance however were significantly (P<0.05) downregulated by cerulenin treatment compared to the control. Our data showed that adiponectin gene expression is regulated by gender, leptin, and cerulenin in a tissue-specific manner. It also suggests that cerulenin does not mimic leptin by downregulating hepatic adiponectin, however it does mimic it by reducing food intake.

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