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Polycomb-group proteins in the initiation and progression of cancer
1State Key Laboratory of Experimental Hematology, The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics, Cancer Institute and Hospital, Department of Cell Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China; Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin 300052, China.
Abstract:
The Polycomb group (PcG) proteins are a family of chromatin regulators and critical for the maintenance of cellular identity. The PcG machinery can be categorized into at least three multi-protein complexes, namely Polycomb Repressive Complex 1 (PRC1), PRC2, and Polycomb Repressive DeUBiquitinase (PR-DUB). Their deregulation has been associated with human cancer initiation and progression. Here we review the updated understanding for PcG proteins in transcription regulation and DNA damage repair and highlight increasing links to the hallmarks in cancer. Accordingly, we discuss some of the recent advances in drug development or strategies against cancers caused by the gain or loss of PcG functions.
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