(+)-Dihydromethysticin

개요Dihydromethysticin is a kavalactone originally isolated from P. methysticum (kava-kava) that has diverse biological activities, including efflux transporter inhibitory, antinociceptive, and neuroprotective properties. Dihydromethysticin is a P-glycoprotein (P-gp) inhibitor that increases uptake of the P-gp substrate calcein AM by 50% in P388 mouse leukemia cancer cells overexpressing P-gp when used at a concentration of 54.6 μM. Dihydromethysticin (275 mg/kg) has analgesic activity, increasing the latency to tail withdrawal in the tail-flick assay in mice. It also decreases the infarct size in a mouse model of ischemia induced by microbipolar coagulation of the left middle cerebral artery (MCA) when administered at a dose of 10 mg/kg.