Inhibition of N-terminal ATPase on HSP90 attenuates colitis through enhanced Treg function.

Inhibition of N-terminal ATPase on HSP90 attenuates colitis through enhanced Treg function.
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DOI:
10.1038/mi.2012.134
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发表时间:
2013-09
期刊:
影响因子:
8
通讯作者:
de Zoeten EF
de Zoeten EF
中科院分区:
医学1区
文献类型:
--
作者:
Collins CB;Aherne CM;Yeckes A;Pound K;Eltzschig HK;Jedlicka P;de Zoeten EF

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炎症性肠病(IBD)是一种慢性炎症性疾病,被认为反映了肠道免疫系统未能充分调节自身。炎症应激导致热休克蛋白(HSP)的上调,包括促炎伴侣蛋白HSP90。该蛋白在细胞质中隔离转录因子,热休克因子1 (HSF1),阻止许多抗炎蛋白的转录。我们假设抑制HSP90可以发挥抗炎作用,从而减轻IBD小鼠模型的肠道炎症。17-AAG抑制HSP90可减少急性DSS和慢性cd45rb高结肠炎模型的炎症,同时结肠中IL-10的产生增加。17-AAG处理小鼠的调节性T细胞(Tregs)在体外被HSF1−/−或IL-10−/−细胞清除时表现出更大的抑制能力。最后,17-AAG处理的Tregs表现出HSF1的核定位增加,导致HSF1应答基因包括HSP70、HSP90和IL-10的上调。
Inflammatory Bowel Disease (IBD) is a chronic inflammatory condition thought to reflect a failure of the enteral immune system to adequately regulate itself. Inflammatory stress drives up-regulation of heat-shock proteins (HSP) including the pro-inflammatory chaperone, HSP90. This protein sequesters the transcription factor, heat-shock factor 1 (HSF1) in the cytoplasm preventing transcription of a number of anti-inflammatory proteins. We hypothesized that inhibition of HSP90 would exert an anti-inflammatory effect and thereby attenuate intestinal inflammation in murine models of IBD. Inhibition of HSP90 with 17-AAG reduced inflammation in acute DSS and chronic CD45RBHigh colitis models coinciding with increased IL-10 production in the colon. Regulatory T cells (Tregs) from mice treated with 17-AAG, demonstrated significantly greater suppressive capacity in vitro abolished in HSF1−/− or IL-10−/− cells. Finally, Tregs treated with 17-AAG exhibited increased nuclear localization of HSF1 with resultant up-regulation of HSF1 response genes including HSP70, HSP90 and IL-10.
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