Development of modulators of multidrug resistance: A pharmacoinformatic approach*

Inhibition of drug efflux pumps such as P-glycoprotein represents a versatile approach for overcoming multidrug resistance in tumor therapy. Although numerous compounds have been identified as being able to inhibit P-glycoprotein, only little is known on the molecular basis of the drug–protein interaction. This article gives an overview of the different pharmacoinformatic approaches we used to develop new propafenone-type modulators of P-glycoprotein. These include 2Dand 3D-QSAR studies, artificial neural networks, and photoaffinity labeling studies.