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Targeting cullin-RING ligases for cancer treatment: rationales, advances and therapeutic implications

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Abstract

New therapeutic intervention strategies for the treatment of human malignancies are always desired. Approval of bortezomib as a front-line treatment for multiple myeloma highlighted the significance of ubiquitin–proteasome system (UPS) as a promising therapeutic target. However, due to the broad impact of proteasome inhibition, deleterious side effects have been reported with bortezomib treatment. Cullin RING ligases (CRLs)-mediated ubiquitin conjugation process is responsible for the ubiquitin conjugation of 20 % cellular proteins that are designated for degradation through the UPS, most of them are critical proteins involved in cell cycle progression, signaling transduction and apoptosis. Studies have depicted the upstream NEDDylation pathway that controls the CRL activity by regulating the conjugation of an ubiquitin-like-protein NEDD8 to the cullin protein in the complex. A specific pharmaceutical inhibitor of NEDD8 activating enzyme (NAE; E1) MLN4924 was recently developed and has been promoted to Phase I clinical trials for the treatment of several human malignancies. This article summarizes the most recent understanding about the process of NEDD8 conjugation, its relevance for cancer therapy and molecular mechanisms responsible for the potent anti-tumor activity of MLN4924.

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  1. School of Life Science and Technology, Harbin Normal University, Harbin, 150025, People’s Republic of China

    Shuju Wu & Lijie Yu

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Wu, S., Yu, L. Targeting cullin-RING ligases for cancer treatment: rationales, advances and therapeutic implications. Cytotechnology 68, 1–8 (2016). https://doi.org/10.1007/s10616-015-9870-0

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