Effects of carvedilol on MDR1-mediated multidrug resistance: comparison with verapamil.

Article Details

Citation

Copy to clipboard

Kakumoto M, Sakaeda T, Takara K, Nakamura T, Kita T, Yagami T, Kobayashi H, Okamura N, Okumura K

Effects of carvedilol on MDR1-mediated multidrug resistance: comparison with verapamil.

Cancer Sci. 2003 Jan;94(1):81-6.

PubMed ID

12708479 [ View in PubMed

]

Abstract

The reversing effects of carvedilol and other beta-adrenoceptor antagonists on multidrug resistance (MDR) were assessed in HeLa cells and the MDR1-overexpressing derivative Hvr100-6 cells, established by stepwise increases of vinblastine concentration in the culture medium. The inhibitory effects on the transcellular transport and intracellular accumulation of [3H]vinblastine and [3H]daunorubicin were also assessed using LLC-GA5-COL150 cell monolayers, established by transfection of human MDR1 cDNA into porcine kidney epithelial LLC-PK1 cells. The cytotoxic effects of vinblastine, paclitaxel, doxorubicin and daunorubicin in Hvr100-6 were reversed 1.4- to 7.1-fold by carvedilol at the realistic clinical concentration of 1 microM, whereas other beta-adrenoceptor antagonists had weaker or no such effects. Transport experiments using LLC-GA5-COL150 cell monolayers demonstrated that this effect of carvedilol was due to the inhibition of MDR1-mediated transport of vinblastine, paclitaxel, doxorubicin and daunorubicin. These MDR1-mediated reversing effects of carvedilol were similar to those of 1 microM verapamil, suggesting that carvedilol could be a candidate modulator of MDR in clinical use. Since other beta-adrenoceptor antagonists had no inhibitory effect on transport, the effects of carvedilol were not related to beta-adrenoceptors and might have been due to antioxidant activity.

DrugBank Data that Cites this Article

Drug Transporters

Drug	Transporter	Kind	Organism	Pharmacological Action	Actions
Carvedilol	P-glycoprotein 1	Protein	Humans	Unknown	Inhibitor	Details