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Effect of Exenatide on serum resistin in ApoE-/- mice with atherosclerosis |
DEND Guoxiong WEI Jinru CHEN Meixiang |
Department of Cardiovascular Medicine, the First People′s Hospital of Nanning, Guangxi Zhuang Autonomous Region, Nanning 530022, China |
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Abstract Objective To investigate the effect of Exenatide on serum resistin in atherosclerosis of apolipoprotein E knockout (ApoE-/-) mice. Methods Thirty six-week-old ApoE-/- male mice fed with high fat were randomly divided into model group (n = 15) and exenatide group (n = 15). The exenatide group was given Exenatide 1.0 nmol/(kg·d), subperitoneal injection twice a day. Male C57BL/6J mice fed with high fat were selected as control group (n = 15). After 12 weeks, the serum was collected and the levels of total cholesterol, high density lipoprotein cholesterol, low density lipoprotein cholesterol and triglyceride were measured by automatic biochemical analyzer. The contents of resistin, tumor necrosis factor-alpha (TNF-α) and interleukin-6 (IL-6) were determined by enzyme-linked immunosorbent assay. The aortic root was pathologically sliced and stained with hematoxylin-eosin (HE), and the corrected patch area was measured. Results The levels of total cholesterol, low density lipoprotein cholesterol, high density lipoprotein cholesterol and triglyceride in the model group were significantly higher than those in the control group(P < 0.01). There was no significant difference in total cholesterol, low density lipoprotein cholesterol, high density lipoprotein cholesterol and triglyceride between the exenatide group and the model group (P > 0.05); the levels of resistin, TNF-α and IL-6 in the model group were significantly higher than those in the control group (P < 0.01), while the contents of resistin, TNF-α and IL-6 in the exenatide group were significantly lower than those in the model group (P < 0.01). The area of corrected atherosclerosis plaque in the exenatide group was significantly smaller than that in the model group (P < 0.05). Conclusion Exenatide can effectively reduce the level of serum resistin in atherosclerotic mice, thereby inhibiting inflammatory response and atherosclerotic plaque progression, which may be one of the mechanisms of glucagon-like peptide-1 receptor agonists in anti-atherosclerosis.
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