Abstract

Resistance of tumors to a variety of chemotherapeutic agents presents a major problem in cancer treatment. The gene responsible for multidrug resistance, termed mdr 1, encodes a membrane glycoprotein (P-glycoprotein) that acts as a pump to transport various cytotoxic agents. The P-glycoprotein has been shown to bind anticancer drugs and several resistance-reversing agents including calcium channel blockers, and to be an ATPase. The P-glycoprotein bears considerable interest as a target for cancer chemotherapy. Possible approaches targeting the P-glycoprotein are described.

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