Toward a chemical marker for inflammatory disease: a fluorescent probe for membrane-localized thioredoxin.

Toward a chemical marker for inflammatory disease: a fluorescent probe for membrane-localized thioredoxin.
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朝着炎症性疾病的化学标志物:一种荧光探针,用于膜定位的硫氧还蛋白。

DOI:
10.1021/ja503356q
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发表时间:
2014-06-11
影响因子:
15
通讯作者:
Kim, Jong Seung
Kim, Jong Seung
中科院分区:
化学1区
文献类型:
--
作者:
Lee, Min Hee;Jeon, Hyun Mi;Han, Ji Hye;Park, Nayoung;Kang, Chulhun;Sesser, Jonathan L.;Kim, Jong Seung

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硫氧还蛋白(Trx)是一种氧化还原活性蛋白,在减轻氧化应激的影响中起着关键作用。细胞膜上Trx的分泌被认为是炎症的一个显着特征。然而,选择性监测膜相关的Trx活性已被证明是具有挑战性的,因为在细胞中的Trx行动的无处不在。在这里,我们报告一个Trx特异性探针,允许可视化的Trx活动与膜通过荧光显微镜。这种探针作为一种可能的筛选工具,调节Trx分泌的药物的能力,在氧化应激条件下的HeLa细胞和细胞脂肪肝模型中得到了证明。对照实验用于确认本发明探针所见的响应是由于Trx,并且其对各种潜在竞争代谢物(包括含硫醇的小分子和测试蛋白质)具有选择性。
Thioredoxin (Trx) is a redox-active protein that plays a key role in mitigating the effects of oxidative stress. The secretion of Trx on the plasma membrane has been suggested as a distinctive feature of inflammation. However, selective monitoring of membrane-associated Trx activity has proved challenging because of the ubiquity of Trx action in cells. Here, we report a Trx-specific probe that allows visualization of Trx activity associated with the membranes via fluorescence microscopy. The ability of this probe to act as a possible screening tool for agents that modulate Trx secretion was demonstrated in HeLa cells under oxidative stress conditions and in a cellular hepatosteatosis model. Control experiments serve to confirm that the response seen for the present probe is due to Trx and that it is selective over various potentially competing metabolites, including thiol-containing small molecules and test proteins.
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