Shining a light on SSP4: A comprehensive analysis and biological applications for the detection of sulfane sulfurs.

Shining a light on SSP4: A comprehensive analysis and biological applications for the detection of sulfane sulfurs.
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DOI:
10.1016/j.redox.2022.102433
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发表时间:
2022-10
期刊:
影响因子:
11.4
通讯作者:
Xian, Ming
Xian, Ming
中科院分区:
生物学1区
文献类型:
--
作者:
Shieh, Meg;Ni, Xiang;Xu, Shi;Lindahl, Stephen P.;Yang, Moua;Matsunaga, Tetsuro;Flaumenhaft, Robert;Akaike, Takaaki;Xian, Ming

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荧光探针是检测生物系统中硫烷硫的有用工具。在这项工作中,我们报告了SSP 4,在我们的实验室产生的一个广泛使用的探针的发展。我们描述了它的演变,制备和物理/化学性质。SSP 4的荧光分析确定了其对硫烷硫的高选择性和灵敏度,即使存在其他物质如氨基酸和金属离子的干扰。开发了以相对快速和简单的方式使用SSP 4检测过硫化蛋白质(包括木瓜蛋白酶、BSA和GAPDH)的方案。然后将该方法应用于人蛋白质二硫键异构酶(PDI),导致发现过硫化可发生在PDI的非活性位点半胱氨酸,并且PDI还原酶活性受硫烷硫处理的影响。还建立了使用SSP 4在不同细胞系中对外源性和内源性硫烷硫进行生物成像的方案。这些结果将指导SSP 4的进一步应用。
Fluorescent probes are useful tools for the detection of sulfane sulfurs in biological systems. In this work, we report the development of SSP4, a widely used probe generated in our laboratory. We describe its evolution, preparation, and physical/chemical properties. Fluorescence analyses of SSP4 determined its high selectivity and sensitivity to sulfane sulfurs, even with the interfering presence of other species, such as amino acids and metal ions. Protocols for using SSP4 in a relatively quick and simple manner for the detection of persulfidated proteins, including papain, BSA, and GAPDH were developed. The method was then applied to human protein disulfide isomerase (PDI), leading to the discovery that persulfidation can occur at PDI's non-active site cysteines, and that PDI reductase activity is affected by sulfane sulfur treatment. Protocols for using SSP4 for the bioimaging of exogenous and endogenous sulfane sulfurs in different -cell lines were also established. These results should guide further applications of SSP4.
硫化物分解代谢可以改善低氧脑损伤。
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