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JOURNAL ARTICLE
REVIEW
Post-translational modification of the death receptor complex as a potential therapeutic target in cancer.
Archives of Pharmacal Research 2019 January 5
Programmed cell death is critical to the physiological function of multi-cellular organisms, controlling development, immunity, inflammation, and cancer progression. Death receptor (DR)-mediated regulation of a protease functions as a second messenger to initiate a death signal cascade to induce apoptosis or necroptosis. Recently, it has become clear that post-translational modifications (PTMs) of signaling components in the DR complex are highly complex, temporally controlled, and tightly regulated, and play an important role in cell death signaling. This review focuses on the molecular mechanisms and pathophysiological consequences of PTMs on the formation of the DR signaling complex, especially with respect to tumor necrosis factor receptor 1 (TNFR1). Furthermore, characterization of the role of PTMs in spatially different TNFR1 complexes (complexes I and II), especially with respect to the role of ubiquitination and phosphorylation of receptor interacting protein 1 (RIP1) in programmed cell death in cancer cells, will be reviewed. By integrating recently gained insight of the functional importance of PTMs in complex I or II, this review discusses how the concerted action of PTMs results in life or death upon DR ligation. Finally, the emerging concept of a sequential cell death checkpoint by the PTMs of RIP1, which may reveal novel therapeutic opportunities for the treatment of some cancers, will be discussed.
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