二甲双胍对晚期糖基化终产物诱导的血管平滑肌细胞增殖的影响

目的：观察晚期糖基化终产物（advanced glycation endproducts,AGEs）对血管平滑肌细胞（vascular smooth muscle cells,VSMCs）增殖的影响及二甲双胍的干预作用。方法：生长状态良好的VSMCs,用不同浓度的AGEs（50、100、200、400 mg/L）干预细胞不同时间（12、24、48、72 h）;不同浓度的二甲双胍（10-3,10-4,5×10-5,10-5,10-6mol/L）与200 mg/L AGEs共干预不同时间（12、24、48、72 h）,MTT法测定VSMCs增殖。结果：50 mg/L AGEs干预72 h时表现出促进增殖的作用,200 mg/L AGEs干预12 h即有增殖促进作用,24 h时作用最强,400 mg/L AGEs各时间点作用同200 mg/LAGEs组;10-3与10-4mol/L二甲双胍干预24 h抑制作用最强,持续到72 h,10-6mol/L抑制增殖作用降低,24 h起效,72 h时仍有作用。结论：AGEs呈浓度和时间依赖性地促进VSMCs增殖;二甲双胍可抑制AGEs诱导的VSMCs增殖作用。

Effects of metformin on the proliferation of vascular smooth muscle cells induced by advanced glycation end products

AIM：To observe the effects of advanced glycation end products on the proliferation of vascular smooth muscle cells（VSMCs） and how the course are interfered with metformin. METHODS： Well-conditioned VSMCs were dealed with different concentrations of advanced glycation end products（50,100,200,400 mg/L） in different times（12,24,48,72 h）.On the basis of above treatments,different concentrations of metformin（10-3,10-4,5×10-5,10-5,10-6 mol/L） were given to interfere VSMCs,combined with the 200 mg/L AGEs on different times（12,24,48,72 h）.The proliferation of VSMCs was measured by MTT.RESULTS：50 mg/L AGEs could promote the proliferation of VSMCs at the time point of 72 h;200 mg/L AGEs began to play the role of promotion at the time point of 12 h,furthermore,24 h were the strongest.The effects of 400 mg/L AGEs was similar to those of 200 mg/L AGEs at all the time points.10-3 mol/L and 10-4 mol/L metformin had the strongest effects of inhibition at the time point of 12 h,and this effect continued to 72 h.10-6 mol/L metformin had lower inhibition on proliferation and its effective time was from 24 h to 72 h.CONCLUSION： AGEs can promote the proliferation of vascular smooth muscle cells in a concentration-and time-dependent manner;metformin can inhibit the proliferation of vascular smooth muscle cells induced by AGEs.