Development of selective inhibitors of phosphatidylinositol 3-kinase C2α

Wen Ting Lo, Hassane Belabed, Murat Kücükdisli, Juliane Metag, Yvette Roske, Polina Prokofeva, Yohei Ohashi, André Horatscheck, Davide Cirillo, Michael Krauss, Christopher Schmied, Martin Neuenschwander, Jens Peter von Kries, Guillaume Médard, Bernhard Kuster, Olga Perisic, Roger L. Williams, Oliver Daumke, Bernard Payrastre, Sonia SeverinMarc Nazaré, Volker Haucke

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


Phosphatidylinositol 3-kinase type 2α (PI3KC2α) and related class II PI3K isoforms are of increasing biomedical interest because of their crucial roles in endocytic membrane dynamics, cell division and signaling, angiogenesis, and platelet morphology and function. Herein we report the development and characterization of PhosphatidylInositol Three-kinase Class twO INhibitors (PITCOINs), potent and highly selective small-molecule inhibitors of PI3KC2α catalytic activity. PITCOIN compounds exhibit strong selectivity toward PI3KC2α due to their unique mode of interaction with the ATP-binding site of the enzyme. We demonstrate that acute inhibition of PI3KC2α-mediated synthesis of phosphatidylinositol 3-phosphates by PITCOINs impairs endocytic membrane dynamics and membrane remodeling during platelet-dependent thrombus formation. PITCOINs are potent and selective cell-permeable inhibitors of PI3KC2α function with potential biomedical applications ranging from thrombosis to diabetes and cancer. [Figure not available: see fulltext.].

Original languageEnglish
Pages (from-to)18-27
Number of pages10
JournalNature Chemical Biology
Issue number1
StatePublished - Jan 2023


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