脑心通/PPARγ信号通路抑制心肌细胞肥大与损伤

被引:0
作者
袁舒平
机构
[1] 江苏大学
关键词
脑心通; 心肌肥大; 心肌损伤; 凋亡; 自噬; 过氧化物酶体增殖物激活受体γ(PPARγ);
D O I
暂无
年度学位
2017
学位类型
硕士
导师
摘要
心脑血管疾病是全球死亡率和发病率最高的疾病之一。脑心通(NXT)是以传统中医理论为基础配制而成的中药复方,其已被中国食品、药品监督管理局(CFDA)批准用于治疗心、脑血管疾病。但是,脑心通对心肌细胞肥大及LPS介导心肌细胞损伤的影响机制目前尚不清楚。本研究发现脑心通增强PPARγ表达,显著促进自噬并抑制mTOR信号通路,从而抑制心肌细胞的肥大,但是这一过程受PPARγshRNA干扰而终止。此外,在脂多糖(LPS)诱导小鼠心肌细胞损伤的过程中,脑心通抑制心肌细胞凋亡并促进自噬,其与增强PPARγ的表达有关。显著性研究结果如下:1)脑心通增加H9c2心肌细胞自噬,其与脑心通增强自噬相关基因的表达有关;2)脑心通抑制H9c2心肌细胞mTOR信号通路的激活;3)脑心通增强PPARγ转录活性;4)脑心通抑制心肌细胞肥大;5)PPARγshRNA干扰终止脑心通抑制心肌细胞肥大效应;6)脑心通预处理小鼠抑制LPS诱导的心肌细胞凋亡;7)脑心通预处理小鼠促进LPS诱导的小鼠心肌细胞自噬,并增强自噬相关基因的表达,其与脑心通增加PPARγ的表达有关。
引用
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页数:74
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