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Cell Death Dis:鼠尾草酚可抑制炎性小体活化,或可用于治疗相关疾病

2020-04-25 QQY MedSci原创

鼠尾草酚可抑制炎性小体的活化,或可作为治疗炎性小体介导的炎症相关疾病的安全有效的候选药物。

炎性小体是一种多蛋白复合物,可以被病原相关分子模式(PAMP)及危险相关分子模式(DAMP)激活,进而激活caspase-1,最后导致细胞凋亡反应和IL-1β(白介素1β)及IL-181-3的产生。

既往研究发现,炎症小体能够参与各种代谢类疾病及炎症相关疾病。在模拟各种人类疾病的动物模型中,炎症小体的药理抑制剂均产生显著的治疗效果。因此,炎症小体被广泛认为是治疗多种疾病的新靶标。

在该研究中,研究人员发现鼠尾草酚(carnosol)可以通过直接靶向HSP90(热休克蛋白90)来抑制NLRP3炎性小体的活化,进而对炎性小体介导的相关疾病起到治疗作用。

研究数据表明,鼠尾草酚能够抑制原代小鼠BMDM细胞(骨髓源性巨噬细胞)、THP-1细胞及hPBMC(人外周血单核细胞)中的NLRP3炎性小体的活化。

机制研究发现,鼠尾草酚通过与HSP90结合抑制其ATPase酶活性并抑制炎性小体的活化过程。体内实验结果表明,在NLRP3炎性小体介导的疾病(包括内毒素血症及非酒精性脂肪性肝炎[NASH])小鼠模型中鼠尾草酚具有显著的治疗作用。

此外,研究人员还发现对小鼠进行持续两周的鼠尾草酚(120 mg/kg,1/日,腹腔注射)治疗,给药小鼠表现出良好的耐受性。

综上,研究结果揭示了鼠尾草酚可抑制炎性小体的活化,或可作为治疗炎性小体介导的炎症相关疾病的安全有效的候选药物。

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    2020-07-12 docwu2019
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    2020-04-27 cy0328

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