YM201636

YM201636 is a novel PIKfyve-specific inhibitor with an IC50 of 54 nM for the net insulin response. YM201636 disrupts retroviral budding. Treatment of a Moloney leukemia virus-expressing cell line with YM201636 (800 nM) inhibits retroviral release by 80%. YM201636 (0-4 μM) significantly inhibits both basal and insulin-activated 2DG uptake in a dose-dependent manner. At concentrations as low as 160 nM, YM201636 nearly completely prevents the net insulin effect. A YM201636 concentration as high as 800 nM inhibits cell surface HA-GLUT4-eGFP accumulation by 45%. YM201636 at the concentration of 800 nM leads to a 55% inhibition of Akt-Ser473 phosphorylation and no detectable changes in total Akt. YM201636 also inhibits the insulin-dependent class IA PI 3-kinase activation at nanomolar doses. YM201636 blocks the endocytic recycling of claudin-1, providing an explanation for the intracellular accumulation. Claudin-2 is also found to constantly recycle in confluent MDCK cells and treatment with YM201636 prevents this recycling and caused accumulation of intracellular claudin-2.