Cell Death & Disease:抑制BRD4能够阻止肾细胞肿瘤的增殖和上皮间质转化

2020-04-30 AlexYang MedSci原创

BRD4在许多不同的病理过程中起作用,尤其是癌症和炎症的发展。细胞焦亡是一种新型炎症程序性细胞死亡。然而,BRD4与细胞焦亡在肾细胞肿瘤(RCC)中的关系仍旧未知。

BRD4在许多不同的病理过程中起作用,尤其是癌症和炎症的发展。细胞焦亡是一种新型炎症程序性细胞死亡。然而,BRD4与细胞焦亡在肾细胞肿瘤(RCC)中的关系仍旧未知。

最近,有研究人员阐释了在RCC组织和细胞中,BRD4的表达水平明显上调,而细胞焦亡相关的蛋白显著减少。通过遗传敲除或者溴域抑制剂JQ1对BRD4的抑制能够阻止细胞增殖和上皮-间质转化(EMT)进程,并能够诱导体内和体外caspase-1依赖的细胞焦亡。另外,体内和体外试验中,BRD4的抑制能够通过细胞焦亡抑制增殖和EMT。更多的是,介导caspase-1依赖的细胞焦亡的NLRP3在BRD4受抑制时表达增加。更多的是,NLRP3的转录活性可被BRD4抑制增强,并且该增强效果可以由NF-κB磷酸化激活阻断,表明了NF-κB是NLRP3的上游调控因子。

最后,研究人员指出,他们的结果表明了BRD4抑制能够阻止细胞增殖和EMT,并通过激活NF-κB-NLRP3-caspase-1细胞焦亡信号途径发挥抗肿瘤作用。因此,BRD4是RCC治疗的一个潜在靶标,并且JQ1是肾细胞癌治疗的很有希望的药物。

原始出处:

Yi-Fan Tan, Min Wang, Zhi-Yuan Chen et al. Inhibition of BRD4 prevents proliferation and epithelial-mesenchymal transition in renal cell carcinoma via NLRP3 inflammasome-induced pyroptosis. Cell Death & Disease. 17 April 2020

 

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    2021-01-12 yxch46
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    2021-02-15 维他命
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    2020-05-02 cy0328

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西安交通大学医学院第一附属医院眼科的Yang J近日在Int J Mol Med发表了一篇文章,他们确定新型NADPH氧化酶(NOX)抑制剂VAS2870对视网膜色素上皮(RPE)细胞中TGF-β依赖的NOX4表达的影响,并对相关的细胞内分子事件进行研究。

Int J Oncol:在前列腺癌中,重楼皂苷I能够抑制入侵和上皮-间质转化

重楼皂苷I(PPI)是一种天然的化合物,可以从巴黎多叶藻的根茎中提取获得,并且在中国已经被用来治疗发烧和头痛。最近,有研究人员评估了PPI在前列腺癌(PC)细胞中的抗肿瘤活性。研究发现,在PC洗吧中,低剂量的PPI能够减少增殖和上皮-间质转化(EMT)。PPI能够减少基质金属蛋白酶7(MMP7)的表达,该酶对肿瘤的转移非常关键。PPI同样能够减少Snail和波形蛋白的表达,上述两种物质是EMT相关