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首页> 外文期刊>Journal of Cellular Physiology >Mitochondrial association of myocilin, product of a glaucoma gene, in human trabecular meshwork cells.
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Mitochondrial association of myocilin, product of a glaucoma gene, in human trabecular meshwork cells.

机译:线粒体myocilin协会的产物青光眼基因,在人类的小梁网细胞。

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摘要

The trabecular meshwork (TM), an ocular tissue next to the cornea, is a major site for regulation of the aqueous humor outflow. Malfunctioning of this tissue is believed to be responsible for development of glaucoma, a major blinding disease. Myocilin is a gene directly linked to the most common form of glaucoma. Its protein product has been localized to both intra- and extra-cellular sites in TM cells. This study was to investigate the association of myocilin with mitochondria in TM cells. In vitro mitochondrial import assays showed that myocilin was imported to the TM mitochondria, targeting to mitochondrial membranes and/or the intermembrane space. The targeting was mediated mostly via the amino-terminal region of myocilin. When myocilin expression was induced either by treatment with dexamethasone or transfection with a myocilin construct, the mitochondrial membrane potential in TM cells, as assessed by JC-1 staining, was lowered. Subcellular fractionation and Western blot analyses confirmed that aportion of myocilin sedimented with the mitochondrial fractions. Upon anti-Fas treatment to provoke apoptosis, an increase of myocilin distribution in cytosolic fraction was observed, suggesting that myocilin was partially released from mitochondrial compartments. These results confirmed the association of myocilin with TM cell mitochondria and indicated that myocilin may have a proapoptotic role in TM cells. J. Cell. Physiol. 213:775-784. (c) 2007 Wiley-Liss, Inc.
机译:小梁网(TM),眼部组织角膜旁边,是一个主要的网站调节房水外流。故障的组织被认为是主要负责开发青光眼致盲的疾病。与最常见的青光眼。蛋白质产品本地化的内部在小梁网细胞和细胞外的网站。探讨myocilin协会吗小梁网细胞的线粒体。线粒体化验表明,myocilin进口是导入TM线粒体,目标线粒体膜和/或膜间隙空间。myocilin伴地区。表达式是通过治疗引起的myocilin地塞米松或转染构造,线粒体膜电位在小梁网细胞评估JC-1染色,降低。污点分析证实,aportion myocilin沉淀与线粒体分数。anti-Fas治疗引起细胞凋亡,一个在胞质增加myocilin分布分数是观察,表明myocilin部分从线粒体释放吗隔间。协会myocilin TM细胞线粒体并指出myocilin可能有一个在小梁网细胞proapoptotic作用。213:775 - 784。

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