PF-543 HCl

PF-543 (1706522-79-3) is a potent (IC50 = 2.0 nM) and selective (>100-fold over SphK2) reversible inhibitor of sphingosine kinase-1 (SphK1) .1 It induced autophagy in head and neck squamous cell carcinoma cells.2 PF-543 mitigated pulmonary fibrosis via reducing lung epithelial cell mitochondrial DNA damage and monocyte recruitment.3 It also alleviated sepsis-induced lung injury in an acute ethanol intoxication model in mice.4 PF-543 inhibited cell cycle and tumor growth in a xenograft model of non-small cell lung cancer.5