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首页> 外文期刊>Cellular Physiology and Biochemistry >Mitochondrial Genome Encoded Proteins Expression Disorder, the Possible Mechanism of the Heart Disease in Metabolic Syndrome
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Mitochondrial Genome Encoded Proteins Expression Disorder, the Possible Mechanism of the Heart Disease in Metabolic Syndrome

机译:线粒体基因组编码的蛋白表达障碍,代谢综合征心脏病的可能机制

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>Background/Aims: The direct consequence of metabolic syndrome (MS) is the increased morbidity and mortality caused by the heart disease. We tried to explain why the heart is more severely damaged during MS from the point of mitochondria, the center of cellular metabolism. Methods: 1. The classic diet induced MS rat model was used to observe the morphological changes of mitochondria by transmission electron microscope (TEM); 2. The expression of mitochondrial DNA (mt-DNA) encoded proteins was observed by immunohistochemistry and Western blot; 3. The expression of mitochondrial ribosomal proteins (MRPs) was observed by real-time PCR. Results: 1. The mitochondrial volume increased but the number was normal in myocardial cells of the MS rats. But in the hepatocytes and skeletal muscle cells, the mitochondrial number decreased; 2.The mt-DNA encoded protein cytochrome b increased significantly in heart but decreased in liver and the ATPase6 increased in liver but decreased in heart of the MS rats; 3. The mRNA levels of MRPS23, MRPL27, MRPL45 and MRPL48 elevated in heart but down-regulated in liver of the MS rats. Conclusion: The morphologic and functional alterations of mitochondrion in MS were tissue specific. Heart displays a distinctive pattern of mitochondrial metabolic status compared with other tissues.
机译:> 背景/目标: 代谢综合症(MS)的直接后果是由心脏病引起的发病率和死亡率增加。我们试图解释为什么从线粒体(细胞代谢的中心)开始,在MS期间心脏会受到更严重的损害。 方法: 1.用经典饮食诱导的MS大鼠模型通过透射电镜观察线粒体的形态变化。 2.通过免疫组织化学和Western blot观察线粒体DNA(mt-DNA)编码蛋白的表达。 3.通过实时PCR观察线粒体核糖体蛋白(MRPs)的表达。 结果: 1. MS大鼠心肌细胞线粒体体积增加,但数量正常。但是,在肝细胞和骨骼肌细胞中,线粒体数目减少了。 2.MS大鼠的mt-DNA编码蛋白细胞色素b在心脏明显增加,但在肝脏减少,而ATPase6在肝脏增加但在心脏减少; 3. MS大鼠的心脏中MRPS23,MRPL27,MRPL45和MRPL48的mRNA水平升高但在肝脏中下调。 结论: MS中线粒体的形态和功能改变具有组织特异性。与其他组织相比,心脏显示出独特的线粒体代谢状态模式。

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