The development of small-molecule inhibitors targeting CD47.

Drug Discovery Today
Wei-Bang YuJin-Jian Lu

Abstract

Immunotherapy has become an indispensable part of cancer treatment. A pivotal phagocytosis checkpoint, named cluster of differentiation 47 (CD47), which functions as 'don't eat me' signal to protect cells from phagocytosis upon interaction with signal regulatory protein alpha (SIRPα) on macrophages, has recently attracted much attention. Numerous antibodies targeting the CD47/SIRPα axis have shown encouraging efficacy in clinical trials. Meanwhile, studies on small-molecule inhibitors that interfere with CD47/SIRPα interaction or regulate CD47 expression are also in full swing. In this review, we summarize the small-molecule inhibitors interrupting the binding of CD47/SIRPα and regulating CD47 at the transcriptional, translational, and post-translational modification (PTM) levels. We provide perspectives and strategies for targeting the CD47/SIRPα phagocytosis checkpoint.

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Citations

Aug 22, 2021·Pharmacological Research : the Official Journal of the Italian Pharmacological Society·Jing WenYongjiang Li
Oct 6, 2021·Journal of Cancer Research and Clinical Oncology·Yu-Chi ChenJin-Jian Lu

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