title: Anti-proliferative effect of the abl tyrosine kinase inhibitor STI571 on the P-glycoprotein positive K562/ADM cell line.
abstract: STI571, an abl tyrosine kinase inhibitor, is less effective in chronic myelogenous leukemia (CML) patients in the accelerated phase and in blastic crisis. We addressed whether STI571 is effective for the CML blastic crisis cell line K562 and the P-glycoprotein (P-gp) positive, multidrug resistance cell line K562/ADM. The present results demonstrate that P-gp positive K562/ADM cells were more resistant than K562 cells to the anti-proliferative and apoptotic effect of STI571, but the co-addition of a P-gp modulator augmented the sensitivity of K562/ADM cells to STI571. For patients in CML blastic crisis, simultaneous use of a P-gp modulator may increase the efficacy of STI571.
authors.affiliation: Department of Hematology, Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo 162-8666, Japan.
authors.forename: Mitsuko
authors.initials: M
authors.lastname: Kotaki
authors.forename: Toshiko
authors.initials: T
authors.lastname: Motoji
authors.forename: Minoko
authors.initials: M
authors.lastname: Takanashi
authors.forename: Yan-Hua
authors.initials: YH
authors.lastname: Wang
authors.forename: Hideaki
authors.initials: H
authors.lastname: Mizoguchi
mesh_terms: D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1 / Q000187:drug effects / Q000378:metabolism*; D000970:Antineoplastic Agents / Q000494:pharmacology*; D017209:Apoptosis / Q000187:drug effects; D001549:Benzamides; D018929:Cell Culture Techniques / Q000379:methods; D002455:Cell Division / Q000187:drug effects*; D018432:Drug Resistance, Multiple; D006801:Humans; D000068877:Imatinib Mesylate; D020014:K562 Cells; D007700:Kinetics; D010879:Piperazines / Q000494:pharmacology*; D011505:Protein-Tyrosine Kinases / Q000037:antagonists & inhibitors; D011743:Pyrimidines / Q000494:pharmacology*; D014410:Tumor Stem Cell Assay
chemical_list: D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1; D000970:Antineoplastic Agents; D001549:Benzamides; D010879:Piperazines; D011743:Pyrimidines; D000068877:Imatinib Mesylate; D011505:Protein-Tyrosine Kinases