Context-dependent role of ATG4B as target for autophagy inhibition in prostate cancer therapy

Context-dependent role of ATG4B as target for autophagy inhibition in prostate cancer therapy
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DOI:
10.1016/j.bbrc.2013.10.117
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发表时间:
2013-11-29
影响因子:
3.1
通讯作者:
Emmenegger, Urban
Emmenegger, Urban
中科院分区:
生物学4区
文献类型:
--
作者:
Tran, Elisa;Chow, Annabelle;Emmenegger, Urban

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ATG4B 属于自噬所需的半胱氨酸蛋白酶自噬素家族,自噬是癌症治疗的新兴靶标。开发药理学 ATG4B 抑制剂是一个非常活跃的研究领域。然而,目前尚缺乏关于 ATG4B 在抗癌治疗中作用的详细研究。通过在体外和体内分析过表达显性失活 ATG4B(C74A) 的 PC-3 和 C4-2 前列腺癌细胞,我们发现 ATG4B(C74A) 的作用与细胞类型、治疗和环境相关。 ATG4B(C74A) 表达可以放大细胞毒性疗法的效果或导致治疗耐药。因此,ATG4B 抑制剂的成功临床应用将取决于找到反应的预测标记。 (C) 2013 Elsevier Inc. 保留所有权利。
ATG4B belongs to the autophagin family of cysteine proteases required for autophagy, an emerging target of cancer therapy. Developing pharmacological ATG4B inhibitors is a very active area of research. However, detailed studies on the role of ATG4B during anticancer therapy are lacking. By analyzing PC-3 and C4-2 prostate cancer cells overexpressing dominant negative ATG4B(C74A) in vitro and in vivo, we show that the effects of ATG4B(C74A) are cell type, treatment, and context-dependent. ATG4B(C74A) expression can either amplify the effects of cytotoxic therapies or contribute to treatment resistance. Thus, the successful clinical application of ATG4B inhibitors will depend on finding predictive markers of response. (C) 2013 Elsevier Inc. All rights reserved.