首页> 外文期刊>Endothelium: Journal of endothelial cell research >Nitrobenzylthioinosine (NBT), a nucleoside transport inhibitor, protects against Shiga toxin cytotoxicity in human microvascular endothelial cells.
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Nitrobenzylthioinosine (NBT), a nucleoside transport inhibitor, protects against Shiga toxin cytotoxicity in human microvascular endothelial cells.

机译:硝基苄基硫代肌苷(NBT),一种核苷转运抑制剂,可防止志贺毒素在人微血管内皮细胞中的细胞毒性。

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摘要

Infections with Shiga toxin (Stx)-producing Escherichia coli (STEC) cause microvascular endothelial cell damage, resulting in hemorrhagic colitis and hemolytic uremic syndrome. The prevention of endothelial cell damage is therefore a crucial step in overcoming this disorder. Here, we report that nitrobenzylthioinosine (NBT), a nucleoside transport inhibitor, has a protective effect against the cytotoxicity of Stxs in human microvascular endothelial cells (HMVECs). The relative viability of cells treated with 1.5-15 pM of Stx1 was reduced to 10-20% of that without Stx1. However, the viability of cells treated with NBT (10-100 microM) remained higher than 80%, even in the presence of Stx1. NBT also protected against Stx1 cytotoxicity in sodium butyrate-treated hypersensitive HMVECs. The protective effect of NBT against Stx cytotoxicity may be due to the depletion of ATP in the cells, thereby inhibiting the entry of Stx1.
机译:产生志贺毒素(Stx)的大肠杆菌(STEC)感染会引起微血管内皮细胞损伤,从而导致出血性结肠炎和溶血性尿毒症综合征。因此,预防内皮细胞损伤是克服这种疾病的关键步骤。在这里,我们报告说,硝基苄硫代肌苷(NBT),一种核苷转运抑制剂,对人微血管内皮细胞(HMVECs)中Stxs的细胞毒性具有保护作用。用1.5-15 pM Stx1处理的细胞的相对生存力降低到不使用Stx1的细胞的10-20%。但是,即使在Stx1存在下,用NBT(10-100 microM)处理的细胞的活力仍高于80%。在丁酸钠治疗的超敏HMVEC中,NBT还可以防止Stx1细胞毒性。 NBT对Stx细胞毒性的保护作用可能是由于细胞中ATP的消耗,从而抑制了Stx1的进入。

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