Dillon Christopher P, Green Douglas R
Department of Immunology, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN, 38105, USA.
Adv Exp Med Biol. 2016;930:1-23. doi: 10.1007/978-3-319-39406-0_1.
Cell death is a major mechanism to eliminate cells in which DNA is damaged, organelles are stressed, or oncogenes are overexpressed, all events that would otherwise predispose cells to oncogenic transformation. The pathways that initiate and execute cell death are complex, genetically encoded, and subject to significant regulation. Consequently, while these pathways are often mutated in malignancy, there is considerable interest in inducing cell death in tumor cells as therapy. This chapter addresses our current understanding of molecular mechanisms contributing to two cell death pathways, apoptotic cell death and necroptosis, a regulated form of necrotic cell death. Apoptosis can be induced by a wide variety of signals, leading to protease activation that dismantles the cell. We discuss the physiological importance of each apoptosis pathway and summarize their known roles in cancer suppression and the current efforts at targeting each pathway therapeutically. The intricate mechanistic link between death receptor-mediated apoptosis and necroptosis is described, as well as the potential opportunities for utilizing necroptosis in the treatment of malignancy.
细胞死亡是清除DNA受损、细胞器应激或癌基因过度表达细胞的主要机制,否则所有这些情况都会使细胞易于发生致癌转化。启动和执行细胞死亡的途径很复杂,由基因编码,并受到显著调控。因此,虽然这些途径在恶性肿瘤中常发生突变,但作为治疗手段诱导肿瘤细胞死亡仍备受关注。本章阐述了我们目前对促成两种细胞死亡途径(凋亡性细胞死亡和坏死性凋亡,一种受调控的坏死性细胞死亡形式)的分子机制的理解。凋亡可由多种信号诱导,导致蛋白酶激活从而拆解细胞。我们讨论了每种凋亡途径的生理重要性,总结了它们在癌症抑制中的已知作用以及目前针对每种途径进行治疗的努力。还描述了死亡受体介导的凋亡与坏死性凋亡之间复杂的机制联系,以及利用坏死性凋亡治疗恶性肿瘤的潜在机会。