晚期糖基化终末产物通过AKT信号通路促进人主动脉血管平滑肌细胞钙化

Promotion role of advanced glycation end products in calcifition of human aorta vascular smooth muscle cells by AKT signaling pathway

目的探讨蛋白激酶B在晚期糖基化终末产物(AGEs)引起的人主动脉血管平滑肌细胞(HASMCs)钙化中的作用。方法体外培养HASMCs,随机分为对照组、DMSO组、AGEs组和AGEs+LY294002组,冯库萨染色检测各组钙化情况;Western blot检测相关蛋白的表达。结果与对照组相比,AGEs组钙化相关蛋白骨形成蛋白-2(BMP-2)、骨保护素(OPG)表达量明显升高(P<0.05),且呈浓度依赖性;与对照组相比,AGEs组P-AKT表达量明显升高(P<0.05),且呈时间和浓度依赖性;与AGEs组相比,AGEs+LY294002组钙化相关蛋白BMP-2、OPG的表达量明显降低(P<0.01)。结论 AKT信号通路在AGEs引起的HAVSMCs钙化中可能起重要作用。

Objective To investigate the effect of protein kinase B on calcifition of human aorta vascular smooth muscle cells （HASMCs） stimulated by advanced glycation end products （AGEs）. Methods HASMCs were cultured in vitro and randomly divided into control group, DMSO group, AGEs group and AGEs ＋ LY294002 group. The calcification of each group was examined by von Kusaa ; the expression of protein was detected by west- . ern blot and ALP levels in each group by Elisa. Results The expression of bone morphogenetic protein-2 （BMP- 2） and osteoprotegerin （OPG） in AGEs group was significantly higher than that in control group （P 〈 0.05）. The expression of phosphorylated AKT in AGEs group was significantly higher than that in control group （P 〈 0.05 ） , and it was time and concentration dependent. Compared with that in AGEs group, the expression of BMP and OPG in AGEs ＋ LY294002 group was significantly decreased （P 〈 0.01 ）. Conclusion AKT signaling pathway may play an important role on calcifition of HASMCs caused by AGEs.