期刊
JOURNAL OF ENDOCRINOLOGY
卷 226, 期 1, 页码 35-42出版社
BIOSCIENTIFICA LTD
DOI: 10.1530/JOE-14-0714
关键词
bisphenol A; glucose intolerance; insulin resistance; skeletal muscle; adipocytokine
资金
- National Research Foundation of the Ministry of Education, Science and Technology of Korea [2010-0023068]
- National Research Foundation of Korea [2010-0023068] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Bisphenol A (BPA) is a widely used endocrine disruptor. Recent epidemiologic results have suggested an association between exposure to BPA and cardiovascular disease, type 2 diabetes, and obesity. We investigated the in vivo effects of long-term oral exposure to BPA on insulin resistance and glucose intolerance. In the present study, 4-to 6-week-old male mice on a high-fat diet (HFD) were treated with 50 mu g/kg body weight per day of BPA orally for 12 weeks. Long-term oral exposure to BPA along with an HFD for 12 weeks induced glucose intolerance in growing male mice. Intraperitoneal glucose tolerance tests showed that the mice that received an HFD and BPA exhibited a significantly larger area under the curve than did those that received an HFD only (119.9 +/- 16.8 vs 97.9 +/- 18.2 mM/min, P = 0.027). Body weight, percentage of white adipose tissue, and percentage of body fat did not differ between the two groups of mice. However, treatment with BPA reduced Akt phosphorylation at position Thr308 and GSK3 beta phosphorylation at position Ser9 in skeletal muscle. BPA tended to decrease serum adiponectin levels and to increase serum interleukin 6 and tumor necrosis factor a, although these findings were not statistically significant. Treatment with BPA did not induce any detrimental changes in the islet area or morphology or the insulin content of beta cells. In conclusion, long-term oral exposure to BPA induced glucose intolerance and insulin resistance in growing mice. Decreased Akt phosphorylation in skeletal muscle by way of altered serum adipocytokine levels might be one mechanism by which BPA induces glucose intolerance.
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