Covalent labeling of mitochondria with a photostable fluorescent thiol-reactive rhodamine-based probe

Covalent labeling of mitochondria with a photostable fluorescent thiol-reactive rhodamine-based probe
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使用光稳定荧光硫醇反应性罗丹明探针对线粒体进行共价标记

DOI:
10.1039/c2ay25106j
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发表时间:
2012-05
期刊:
影响因子:
3.1
通讯作者:
韩守法
韩守法
中科院分区:
化学3区
文献类型:
--
作者:
韩守法

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线粒体的荧光成像是研究线粒体功能的重要工具。用电位指示染料染色线粒体,例如,若丹明123在某些条件下跨膜电位丧失时容易消失。研究表明,1-(罗丹明B)-4-(2 '-氯乙酰基)-哌嗪酰胺(RB-CAP)通过电泳积聚到线粒体中,与线粒体内蛋白质巯基形成共价生物缀合物,使线粒体染色能够在随后的跨膜电位崩溃中持续。RB-CAP是高度光稳定的,并在活细胞中的线粒体的共价标记中表现出严格的选择性。由于价格便宜得多,RB-CAP是线粒体功能研究中MitoTracker探针的上级替代品。
Fluorescent imaging of mitochondria is an essential tool for studies of mitochondrial functions. The staining of mitochondria with potential-indicating dyes, e.g., rhodamine 123, readily vanishes upon loss of the transmembrane potential under certain conditions. 1-(Rhodamine B)-4-(2′-chloroacetyl)-piperazine amide (RB-CAP) was shown to be electrophoretically accumulated into mitochondria, forming covalent bioconjugates with intramitochondrial protein sulfhydryls which enabled the mitochondrial staining to endure in subsequent collapse of the transmembrane potentials. RB-CAP is highly photostable and exhibits stringent selectivity in covalent labeling of mitochondria in living cells. Being much less expensive, RB-CAP is a superior substituent for MitoTracker probes in functional studies of mitochondria.
癌症中的线粒体:在生与死的十字路口。
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