[MDR reversing drugs for clinical development]

Abstract

Since we discovered verapamil as an MDR-reversing agent in 1981, many MDR-reversing compounds have been reported. This type of drug must be very effective but minimal side effects. We recently found that MS-209 and PSC-833 to be reversing agents that interact directly with P-glycoprotein and show good MDR-reversing effect, both in vitro and in vivo. MS-209 and PSC-833 are thus interesting compounds for clinical use in future.