WX8，5MG，SML3288-5MG，Sigma

Biochem/physiol Actions

Selective phosphoinositide kinase PIKfyve inhibitor with higher antiproliferation potency in A375 cultures than YM201636, chloroquine or hydroxychloroquine.
WX8 (Ro 91-4714) is a selective phosphoinositide kinase PIKfyve inhibitor that disrupts lysosome fission via tubulation, lysosomal trafficking, and heterotypic lysosomes-autophagosomes fusion (0.1-1 µM; U2OS), but not homotypic lysosome fusion. WX8 exhibits cancer-selective antiproliferation activity (IC50 = 48 nM/A375, 200 nM/U2OS; IC50 >10 µM/non-cancer 293T & HFF) with a higher potency than the PIKfyve inhibitor YM201636, or the lysosomal inhibitors chloroquine & hydroxychloroquine (A375 IC50 = 119 nM, 1.7 µM, 1.9 µM, repectively).