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抑制肾细胞癌及其相关肿瘤内皮细胞的自噬作用。

Inhibiting Autophagy in Renal Cell Cancer and the Associated Tumor Endothelium.

机构信息

Bioengineering, University of Pittsburgh, Pittsburgh, PA.

Department of Genetics, Washington University, St Louis, MO.

出版信息

Cancer J. 2019 May/Jun;25(3):165-177. doi: 10.1097/PPO.0000000000000374.

Abstract

The clear cell subtype of kidney cancer encompasses most renal cell carcinoma cases and is associated with the loss of von Hippel-Lindau gene function or expression. Subsequent loss or mutation of the other allele influences cellular stress responses involving nutrient and hypoxia sensing. Autophagy is an important regulatory process promoting the disposal of unnecessary or degraded cellular components, tightly linked to almost all cellular processes. Organelles and proteins that become damaged or that are no longer needed in the cell are sequestered and digested in autophagosomes upon fusing with lysosomes, or alternatively, released via vesicular exocytosis. Tumor development tends to disrupt the regulation of the balance between this process and apoptosis, permitting prolonged cell survival and increased replication. Completed trials of autophagic inhibitors using hydroxychloroquine in combination with other anticancer agents including rapalogues and high-dose interleukin 2 have now been reported. The complex nature of autophagy and the unique biology of clear cell renal cell carcinoma warrant further understanding to better develop the next generation of relevant anticancer agents.

摘要

肾透明细胞癌亚型包含了大多数肾细胞癌病例,与 von Hippel-Lindau 基因功能或表达丧失有关。随后另一个等位基因的缺失或突变影响涉及营养和缺氧感应的细胞应激反应。自噬是一种重要的调节过程,促进不必要或降解的细胞成分的处理,与几乎所有的细胞过程紧密相连。受损的细胞器和蛋白质,或者在细胞中不再需要的蛋白质,在与溶酶体融合时被隔离并在自噬体中消化,或者通过囊泡胞吐作用释放。肿瘤的发展往往会破坏细胞凋亡过程和自噬之间的平衡调节,从而允许细胞的长期存活和增加复制。目前已经报道了使用羟氯喹联合其他抗癌药物(包括雷帕霉素和高剂量白细胞介素 2)进行自噬抑制剂的临床试验。自噬的复杂性和肾透明细胞癌的独特生物学特性需要进一步的理解,以更好地开发下一代相关的抗癌药物。

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