IWP-4
IWP-4 is an inhibitor of Wnt production that impairs Wnt pathway activity in vitro with an IC50 value of 25 nM.{17505} IWP-4 inactivates Porcupine, a membrane-bound O-acyltransferase responsible for palmitoylating Wnt proteins, which is essential for their signaling ability and secretion.{17505} At 5 ?M, IWP-4 has been shown to block Wnt-dependent phosphorylation of the low-density lipoprotein receptor-related protein 6 receptor and the scaffold protein Dishevelled, preventing the accumulation of ?-catenin.{17505} This compound has been used to induce cardiomyocyte differentiation from human pluripotent stem cells.{23268}
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