The farnesyl transferase inhibitor, tipifarnib, is a potent inhibitor of the MDR1 gene product, P-glycoprotein, and demonstrates significant cytotoxic synergism against human leukemia cell lines.
Medeiros BC, Landau HJ, Morrow M, Lockerbie RO, Pitts T, Eckhardt SG. The farnesyl transferase inhibitor, tipifarnib, is a potent inhibitor of the MDR1 gene product, P-glycoprotein, and demonstrates significant cytotoxic synergism against human leukemia cell lines. Leukemia. 2007 Apr; 21(4):739-46.