[Mechanism of resistance to antitumor agents--its involvement in blood-brain barrier].
Resistance of tumors to a variety of chemotherapeutic agents presents a major problem in cancer treatment. The gene responsible for multidrug resistance, termed mdr1, 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 was found to function in the blood-brain barrier. The physiological function of the P-glycoprotein in relation to therapy is discussed.
Tsuruo
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Institute of Molecular and Cellular Biosciences, University of Tokyo, Japan.
D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1 / Q000235:genetics / Q000502:physiology*; D000818:Animals; D000970:Antineoplastic Agents / Q000493:pharmacokinetics*; D001692:Biological Transport; D001812:Blood-Brain Barrier; D004337:Drug Carriers; D018432:Drug Resistance, Multiple / Q000235:genetics*; D004730:Endothelium, Vascular / Q000378:metabolism; D006801:Humans; D009369:Neoplasms / Q000378:metabolism* / Q000473:pathology
D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1; D000970:Antineoplastic Agents; D004337:Drug Carriers