Mitochondria are the bioenergetics and metabolic center of eucaryotic cells that carry out many important functions to sustain life. Recent biochemical studies revealed another aspect of mitochondrial function: induci...Mitochondria are the bioenergetics and metabolic center of eucaryotic cells that carry out many important functions to sustain life. Recent biochemical studies revealed another aspect of mitochondrial function: inducing apoptosis by triggering specific biochemical reactions that lead to rapid disposal of damaged cells. In response to a variety of apoptotic stimuli, mitochondria release many apoptogenic proteins that normally reside in the intermembrane space of mitochondria. These studies suggest that mitochondria are dynamic responsive structures engaged incessantly in controlling metabolic and genetic interaction with other cellular organelles. Consequently, when cellular milieu is no longer conducive to maintaining homeostasis, either due to injury or developmental cues, mitochondria initiate apoptotic programs that efficiently demise the cell.展开更多
目的探讨高糖环境中肝X受体通过线粒体途径在调控H9C2细胞凋亡过程中的作用。方法以H9C2细胞为研究对象,分为低糖组(Control组)、甘露醇组、高糖组、高糖+T0901317组及高糖+5CPPSS-50组。检测各组H9C2细胞的活性,细胞内活性氧水平,Bax、...目的探讨高糖环境中肝X受体通过线粒体途径在调控H9C2细胞凋亡过程中的作用。方法以H9C2细胞为研究对象,分为低糖组(Control组)、甘露醇组、高糖组、高糖+T0901317组及高糖+5CPPSS-50组。检测各组H9C2细胞的活性,细胞内活性氧水平,Bax、Bcl-2 m RNA,cleaved caspase-3蛋白的表达及细胞凋亡率,并观察细胞线粒体膜电位变化。结果表达LXRs组明显降低高糖诱导的Bax m RNA、激活型caspase3蛋白表达和细胞内活性氧水平;上调高糖抑制的Bcl-2 m RNA表达和线粒体膜电位。结论 LXRs激动剂T0901317可改善高糖环境中H9C2细胞活性,抑制细胞凋亡,对细胞起到一定的保护作用;抑制LXRs后,对高糖环境中H9C2细胞损伤作用更明显。LXRs可通过线粒体途径调控高糖环境所致H9C2细胞凋亡。展开更多
文摘Mitochondria are the bioenergetics and metabolic center of eucaryotic cells that carry out many important functions to sustain life. Recent biochemical studies revealed another aspect of mitochondrial function: inducing apoptosis by triggering specific biochemical reactions that lead to rapid disposal of damaged cells. In response to a variety of apoptotic stimuli, mitochondria release many apoptogenic proteins that normally reside in the intermembrane space of mitochondria. These studies suggest that mitochondria are dynamic responsive structures engaged incessantly in controlling metabolic and genetic interaction with other cellular organelles. Consequently, when cellular milieu is no longer conducive to maintaining homeostasis, either due to injury or developmental cues, mitochondria initiate apoptotic programs that efficiently demise the cell.
文摘目的探讨高糖环境中肝X受体通过线粒体途径在调控H9C2细胞凋亡过程中的作用。方法以H9C2细胞为研究对象,分为低糖组(Control组)、甘露醇组、高糖组、高糖+T0901317组及高糖+5CPPSS-50组。检测各组H9C2细胞的活性,细胞内活性氧水平,Bax、Bcl-2 m RNA,cleaved caspase-3蛋白的表达及细胞凋亡率,并观察细胞线粒体膜电位变化。结果表达LXRs组明显降低高糖诱导的Bax m RNA、激活型caspase3蛋白表达和细胞内活性氧水平;上调高糖抑制的Bcl-2 m RNA表达和线粒体膜电位。结论 LXRs激动剂T0901317可改善高糖环境中H9C2细胞活性,抑制细胞凋亡,对细胞起到一定的保护作用;抑制LXRs后,对高糖环境中H9C2细胞损伤作用更明显。LXRs可通过线粒体途径调控高糖环境所致H9C2细胞凋亡。