title: Level of protein kinase C activity correlates directly with resistance to adriamycin in murine fibrosarcoma cells.
abstract: In this report, we demonstrate a direct correlation between protein kinase C (PKC) activity and adriamycin (ADR) resistance in mouse fibrosarcoma cells. PKC activity was measured in four murine UV-2237M fibrosarcoma cell lines that differed in the degrees to which they expressed resistance to ADR, which is an inhibitor of PKC. A comparison of the four cell lines revealed a positive correlation between the level of PKC activity and resistance to ADR. Incubation of the cells with the PKC inhibitor H-7 produced a partial reversal of ADR resistance. Taken together, these results suggest a role for PKC in the mechanism of ADR resistance.
authors.affiliation: Department of Cell Biology, University of Texas M.D. Anderson Cancer Center, Houston 77030.
authors.forename: C A
authors.initials: CA
authors.lastname: O'Brian
authors.forename: D
authors.initials: D
authors.lastname: Fan
authors.forename: N E
authors.initials: NE
authors.lastname: Ward
authors.forename: C
authors.initials: C
authors.lastname: Seid
authors.forename: I J
authors.initials: IJ
authors.lastname: Fidler
mesh_terms: D019307:1-(5-Isoquinolinesulfonyl)-2-Methylpiperazine; D000818:Animals; D002470:Cell Survival / Q000187:drug effects; D004317:Doxorubicin / Q000494:pharmacology*; D004351:Drug Resistance / Q000235:genetics; D005354:Fibrosarcoma / Q000201:enzymology*; D007546:Isoquinolines / Q000494:pharmacology; D051379:Mice; D010641:Phenotype; D010879:Piperazines / Q000494:pharmacology; D011493:Protein Kinase C / Q000037:antagonists & inhibitors / Q000378:metabolism*; D014407:Tumor Cells, Cultured
chemical_list: D007546:Isoquinolines; D010879:Piperazines; D004317:Doxorubicin; D019307:1-(5-Isoquinolinesulfonyl)-2-Methylpiperazine; D011493:Protein Kinase C