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首页> 外文期刊>Cell and Tissue Research >Expression and localization of TRPC proteins in rat ventricular myocytes at various developmental stages
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Expression and localization of TRPC proteins in rat ventricular myocytes at various developmental stages

机译:TRPC蛋白在不同发育阶段的大鼠心室肌细胞中的表达和定位

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Growing evidence indicates that transient receptor potential canonical (TRPC) channels play important roles in various Ca2+-mediated physiological and pathophysiological processes, including development. Many types of TRPC proteins are expressed in the heart. However, limited data are available comparing the expression and localization among TRPC proteins in the ventricular myocyte at various developmental stages. Our purpose is to investigate the expression and localization profile of TRPC proteins in ventricular myocytes of fetal (18.5 days), neonatal ( 24 h after birth) and adult (8 week old) rats. Western blotting, immunofluorescence and confocal laser scanning microscopy were employed. TRPC1/3-6 proteins were expressed in the rat ventricle throughout the three developmental stages. The expression profile of TRPC1/3/4 in the ventricle followed an upward trend from the fetus to the adult. By contrast, TRPC6 in the ventricle was expressed at the highest level in the fetal group and was sharply down-regulated immediately after birth. TRPC5 expression in the ventricle did not change significantly during the three stages. TRPC1/3/5/6 proteins were localized to the T-tubule and TRPC1/3/4/6 to intercalated disks in adult myocytes. The wide spatiotemporal overlap and dynamic regulation of TRPC expression in ventricular myocytes indicates potential complex combinations and redundancy of native TRPC proteins in the heart and gives important clues for further investigations into the exact subunit compositions and functional properties of native TRPC channels in the heart.
机译:越来越多的证据表明,瞬时受体电位规范(TRPC)通道在各种Ca2 +介导的生理和病理生理过程(包括发育)中起重要作用。心脏中表达多种类型的TRPC蛋白。但是,只有有限的数据可以比较不同发育阶段心室肌细胞中TRPC蛋白之间的表达和定位。我们的目的是研究TRPC蛋白在胎儿(18.5天),新生儿(出生后<24小时)和成年(8周龄)大鼠的心室肌细胞中的表达和定位情况。使用蛋白质印迹,免疫荧光和共聚焦激光扫描显微镜。 TRPC1 / 3-6蛋白在三个发育阶段均在大鼠心室中表达。从胎儿到成人,TRPC1 / 3/4在心室中的表达特征呈上升趋势。相比之下,胎儿组脑室中的TRPC6表达最高,出生后立即下调。在这三个阶段,心室中的TRPC5表达没有明显变化。 TRPC1 / 3/5/6蛋白位于成年心肌细胞的T管中,而TRPC1 / 3/4/6则位于插入的磁盘中。心室肌细胞中TRPC表达的广泛时空交叠和动态调节表明心脏中天然TRPC蛋白的潜在复杂组合和冗余,并为进一步研究心脏天然TRPC通道的确切亚基组成和功能特性提供了重要线索。

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