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| 1 | 血管内皮生长因子对急性心肌梗死大鼠心肌细胞凋亡的影响显示文摘目的 探讨静脉应用血管内皮生长因子 (VEGF)对急性心肌梗死大鼠心肌细胞凋亡及凋亡相关蛋白P5 3、Fas、Bax和Bcl 2表达的影响。 方法 3 3只雄性SD大鼠结扎左冠状动脉后 2 4h随机接受VEGF16 5 肝素 (治疗组 )或肝素 生理盐水 (对照组 )治疗。VEGF16 5(2 μg/1ml)加肝素 (5 0U)或肝素 生理盐水 (5 0U/1ml)每天经尾静脉注射 ,共用 7d(治疗组 8只 ,对照组 10只 )和 14d(治疗组 7只 ,对照组 8只 )。于结扎后第 9天和第 16天测定心肌细胞凋亡指数、心肌组织P5 3、Fas、Bax和Bcl 2蛋白的表达。 结果 治疗组的心肌细胞凋亡数量明显少于对照组〔第 9天 :(10± 2 ) %比 (2 8±2 ) % ,P <0 0 1;第 16天 :(6± 2 ) %比 (12± 2 ) % ,P <0 0 5〕 ,VEGF抑制P5 3、Fas和Bax的表达 ,促进Bcl 2的表达。 结论 每天静脉应用VEGF 14d可减少心肌细胞凋亡 ,抑制P5 3、Fas和Bax的表达 ,促进Bcl | 尹瑞兴 李佳荃 蔡捷 杨德寨 | 2003 | 中华老年医学杂志2003，22，2： | 9 |
| 2 | Effects of nuclear translocation of tissue transglutaminase and the release of cytochrome C on hepatocyte apoptosis显示文摘Objective To assess the effects of nuclear translocation of tissue transglutaminase (TTG) and the release of cytochrome C on hepatocyte apoptosis and to reveal the mechanism of signal transduction of early apoptosis in injured hepatocytes. Methods Hepatocytes isolated from tissue transglutaminase gene knock-out mice and rats were stimulated with ethanol. Proteins from whole cell, cytoplasm and nuclei were extracted for determination of TTG activity by 14C-putrescine incorporation. Distribution of TTG throughout the entire cell, as well as just nucleus was observed under a confocal scanning microscope. The amount of cytochrome C released from mitochondria was determined by ELISA. Cell apoptosis was observed by fluorescent cytochemistry.Results TTG activity in whole cells and nuclei was significantly increased after the hepatocytes were treated with ethanol. Cytochrome C release was remarkably increased in the cells isolated from rat and wild-type mouse after treatment with ethanol but not in TTG gene knock-out mice. Cellular apoptosis appeared in hepatocytes isolated from rats and wild-type mice but not in the hepatocytes from TTG gene knock-out mice after stimulation with ethanol.Conclusions Increased TTG in hepatocytes can be translocated into the nucleus and promote release of mitochondrial cytochrome C into the cytoplasm. Passing through a series of signal pathways, hepatocyte apoptosis is induced eventually. | 宋良文 马宪梅 李扬 崔雪梅 王晓民 | 2003 | Chinese Medical Journal2003，，5： | 0 |
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