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. 2012 May;33(5):652-9.
doi: 10.1038/aps.2012.11. Epub 2012 Mar 26.

Chronic ethanol consumption increases the levels of chemerin in the serum and adipose tissue of humans and rats

Rui-zhen Ren  1 , Xu Zhang, Jin Xu, Hai-qing Zhang, Chun-xiao Yu, Ming-feng Cao, Ling Gao, Qing-bo Guan, Jia-jun Zhao
Affiliations

Chronic ethanol consumption increases the levels of chemerin in the serum and adipose tissue of humans and rats

Rui-zhen Ren et al. Acta Pharmacol Sin. 2012 May.

Abstract

Aim: Chemerin is a new adipokine involved in adipogenesis and insulin resistance. Since ethanol affects the insulin sensitivity that is closely associated with adipokines. The aim of this study was to investigate the effects of ethanol on chemerin in humans and rats.

Methods: In the human study, 148 men who consumed alcohol for more than 3 years and 55 men who abstained from alcohol were included. Based on ethanol consumption per day, the drinkers were classified into 3 groups: low-dose (<15 g/d), middle-dose (15-47.9 g/d) and high-dose (≥48 g/d). Anthropometric measurements and serum parameters were collected. In the rat study, 27 male Wistar rats were randomly divided into 4 groups administered water or ethanol (0.5, 2.5, or 5 g·kg(-1)·d(-1)) for 22 weeks. The chemerin levels in the sera, visceral adipose tissue (VAT) and liver were measured using ELISA.

Results: In the high-dose group of humans and middle- and high-dose groups of rats, chronic ethanol consumption significantly increased the serum chemerin level. Both the middle- and high-dose ethanol significantly increased the chemerin level in the VAT of rats. In humans, triglyceride, fasting glucose, insulin and HOMA-IR were independently associated with chemerin. In rats, the serum chemerin level was positively correlated with chemerin in the VAT after adjustments for the liver chemerin (r=+0.768). High-dose ethanol significantly increased the body fat in humans and the VAT in rats.

Conclusion: Chronic ethanol consumption dose-dependently increases the chemerin levels in the serum and VAT. The serum chemerin level is associated with metabolic parameters in humans. The increased serum chemerin level is mainly attributed to an elevation of chemerin in the VAT after the ethanol treatment.

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Figures

Figure 1
Figure 1
The effects of chronic ethanol treatment on the chemerin levels in serum (A), VAT (B), and liver (C) of rats. Wistar rats in group C, group L, group M, and group H were fed with edible ethanol doses of 0, 0.5, 2.5, and 5.0 g·kg-1·d-1, respectively, for 22 weeks. The chemerin levels in the sera, VATs and livers were measured by ELISAs. The values are given as the mean±SD (n=9 in group C; n=6 in group L, group M and group H). VAT, visceral adipose tissue. bP<0.05, cP<0.01 vs group C. eP<0.05 vs group L.
Figure 2
Figure 2
Correlation of the chemerin levels between the sera and tissues of the rats. Wistar rats in group C, group L, group M, and group H were fed with edible ethanol doses of 0, 0.5, 2.5, and 5.0 g·kg-1·d-1, respectively, for 22 weeks. The chemerin levels in the sera, VATs and livers were measured by ELISAs. (A) The correlation between the serum and VAT chemerin levels after adjusting for the liver chemerin. (B) The correlation between the serum and liver chemerin levels after adjusting for the VAT chemerin. VAT, visceral adipose tissue.
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