Title : Detoxication of vinca alkaloids by human P450 CYP3A4-mediated metabolism: implications for the development of drug resistance.

Pub. Date : 2000 Jul

PMID : 10871337






5 Functional Relationships(s)
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1 Whereas vincristine and vinblastine at a concentration of 100 nM killed more than 90% of the parental cells, more than 50 and 35%, respectively, of cells that coexpressed CYP3A4 and cytochrome P450 (P450) reductase survived these treatments. Vinblastine cytochrome P450 family 3 subfamily A member 4 Homo sapiens
2 Similarly, preincubation of vinblastine with bacterial membranes that contained recombinant CYP3A4 and P450 reductase decreased the cytotoxicity of vinblastine for parental Chinese hamster ovary cells. Vinblastine cytochrome P450 family 3 subfamily A member 4 Homo sapiens
3 Similarly, preincubation of vinblastine with bacterial membranes that contained recombinant CYP3A4 and P450 reductase decreased the cytotoxicity of vinblastine for parental Chinese hamster ovary cells. Vinblastine cytochrome P450 family 3 subfamily A member 4 Homo sapiens
4 We also demonstrate that the presence of vinblastine in a coculture of cells that expressed beta-galactosidase together with cells that expressed CYP3A4 strongly selected for the latter cells, resulting in an increased level of CYP3A4 in the surviving cell population. Vinblastine cytochrome P450 family 3 subfamily A member 4 Homo sapiens
5 Similarly, treatment of the human colon adenocarcinoma cell line LS174T with vinblastine selected for a cell population with higher levels of endogenous CYP3A4 as revealed by immunohistochemistry without simultaneous increase of multidrug resistance protein 1 (MDR1). Vinblastine cytochrome P450 family 3 subfamily A member 4 Homo sapiens