内科学
内分泌学
异种雌激素
胰岛素
高胰岛素血症
胰岛素受体
过剩4
胰岛素抵抗
IRS1
胰岛素受体底物
化学
生物
作者
Preethi Sivashanmugam,Vigneswari Mullainadhan,Balasubramanian Karundevi
标识
DOI:10.1016/j.cbi.2017.01.022
摘要
Environmental contaminant, Bisphenol-A (BPA) is a xenoestrogen, an essential component used for the production of two classes of polymers such as polycarbonate and epoxy resin which disrupts the normal endocrine function. BPA has intense effects on mice endocrine pancreas, an essential tissue involved in glucose metabolism. It disrupts pancreatic β-cell insulin content, induces hyperinsulinemia and insulin resistance in male rats. Cardiac muscle is an insulin responsive organ and insulin has direct effects on glucose transport. The present study was designed to assess the effect of BPA on insulin signaling molecules in the cardiac muscle of adult male Wistar rat. Adult male Wistar rats (200-250 g) were selected and divided into following groups: Group 1: Control (vehicle treated), Group 2: Rats treated with 10 mg BPA/kg b.wt./day for 30 days orally, Group 3: Rats treated with 100 mg BPA/kg b.wt./day for 30 days orally, Group 4: Rats treated with 400 mg BPA/kg b.wt./day for 30 days orally. IR (insulin receptor) and pIRTyr1162 proteins were significantly decreased in the high dose group (400 mg). There was no change in IRS1 (insulin receptor substrate-1) and Akt proteins. Whereas, a decrease in pIRS1Tyr632 (100 mg and 400 mg), pAkt Ser473 (400 mg) and GLUT4 (glucose transporter 4) (cytosolic and plasma membrane) proteins was observed which may affect the cardiovascular function. It is concluded that BPA exposure has adverse effect on cardiac insulin signal transduction which may affect its function.
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