title: Reversal of P-glycoprotein associated multidrug resistance by new isoprenoid derivatives.
abstract: To find a drug to overcome P-glycoprotein associated multidrug resistance, we synthesized 43 new isoprenoid derivatives. Ten compounds were effective in an in vitro assay with the human MDR-type resistant carcinoma KB/VJ-300 and MRP-type KB/VP-4 cell lines. One of the most effective compounds, N-5228 [trans-N,N'-bis(3,4-dimethoxybenzyl)-N-solanesyl-1,2-diaminocyclohexane, mol. wt 1100.481, was tested in P388/VCR-bearing mice. It showed a antitumor effect on MDR-type resistant tumor cells. Moreover, N-5228 potentiated the accumulation of [3H]vincristine in drug-resistant cells and blocked [3H]azidopine photoaffinity labeling of P-glycoprotein molecules in MDR-type resistant cell membranes. We think that N-5228 is promising as a lead compound in the screening of resistance reversing drugs for multidrug resistant cancers.
authors.affiliation: The Kitasato Institute, Tokyo, Japan. mhayashi@kitasato-u.ac.jp
authors.forename: M
authors.initials: M
authors.lastname: Hayashi
authors.forename: K
authors.initials: K
authors.lastname: Koike
authors.forename: M C
authors.initials: MC
authors.lastname: Rho
authors.forename: M
authors.initials: M
authors.lastname: Kuwano
authors.forename: T
authors.initials: T
authors.lastname: Kishiye
authors.forename: K
authors.initials: K
authors.lastname: Komiyama
mesh_terms: D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1 / Q000037:antagonists & inhibitors* / Q000502:physiology; D000345:Affinity Labels; D000818:Animals; D000903:Antibiotics, Antineoplastic / Q000494:pharmacology; D000972:Antineoplastic Agents, Phytogenic / Q000494:pharmacology; D002462:Cell Membrane / Q000378:metabolism; D003510:Cyclohexanes / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology*; D004317:Doxorubicin / Q000494:pharmacology; D018432:Drug Resistance, Multiple; D019008:Drug Resistance, Neoplasm; D005260:Female; D006801:Humans; D007941:Leukemia P388 / Q000188:drug therapy; D051379:Mice; D008815:Mice, Inbred Strains; D013729:Terpenes / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology*; D014407:Tumor Cells, Cultured; D014750:Vincristine / Q000494:pharmacology
chemical_list: D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1; D000345:Affinity Labels; D000903:Antibiotics, Antineoplastic; D000972:Antineoplastic Agents, Phytogenic; D003510:Cyclohexanes; D013729:Terpenes; D014750:Vincristine; D004317:Doxorubicin