Contractile Apparatus of Cardiomyocytes in Premature Rats.

IF 0.7 4区 医学 Q4 MEDICINE, RESEARCH & EXPERIMENTAL
V V Ivanova, O N Serebryakova, A D Dolbnya, R I Pleshko, F V Alyabyev, I V Milto
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引用次数: 0

Abstract

The contractile apparatus of left-ventricular cardiomyocytes from from 180-day-old rats that had been born one day preterm was studied using polarization microscopy and transmission electron microscopy. In cardiomyocytes from preterm rats, the myofibrils had non-uniform thickness: along with thinned and disintegrated areas of myofibrils, thickened myofibrils were detected. Myofibril lysis was predominantly focal and less frequently diffuse. Cardiomyocytes with subsegmental contractures were observed. Mitochondria with signs of destruction were detected in cardiomyocytes from premature rats, while numerous small mitochondria that did not form intermitochondrial junctions were found in the dilated intermyofibrillar spaces. Mitochondrial damage leads to structural and functional disturbances of the cardiomyocyte contractile apparatus.

早产儿大鼠心肌细胞的收缩装置。
用偏光显微镜和透射电镜观察了早产1天的180日龄大鼠左心室心肌细胞的收缩装置。在早产大鼠心肌细胞中,肌原纤维厚度不均匀:随着肌原纤维变薄和解体的区域,检测到增厚的肌原纤维。肌原纤维溶解主要是局灶性的,很少是弥漫性的。观察心肌细胞亚节段性收缩。在早产大鼠心肌细胞中检测到有破坏迹象的线粒体,而在扩张的肌纤维间隙中发现了许多没有形成间歇性线粒体连接的小线粒体。线粒体损伤导致心肌细胞收缩装置的结构和功能紊乱。
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来源期刊
Bulletin of Experimental Biology and Medicine
Bulletin of Experimental Biology and Medicine 医学-医学:研究与实验
CiteScore
1.50
自引率
14.30%
发文量
265
审稿时长
2 months
期刊介绍: Bulletin of Experimental Biology and Medicine presents original peer reviewed research papers and brief reports on priority new research results in physiology, biochemistry, biophysics, pharmacology, immunology, microbiology, genetics, oncology, etc. Novel trends in science are covered in new sections of the journal - Biogerontology and Human Ecology - that first appeared in 2005. World scientific interest in stem cells prompted inclusion into Bulletin of Experimental Biology and Medicine a quarterly scientific journal Cell Technologies in Biology and Medicine (a new Russian Academy of Medical Sciences publication since 2005). It publishes only original papers from the leading research institutions on molecular biology of stem and progenitor cells, stem cell as the basis of gene therapy, molecular language of cell-to-cell communication, cytokines, chemokines, growth and other factors, pilot projects on clinical use of stem and progenitor cells. The Russian Volume Year is published in English from April.
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