Cyclosporin A and verapamil have different effects on energy metabolism in multidrug-resistant tumour cells.

Cyclosporin A (Sandimmune) rapidly induced an increase in daunorubicin accumulation in multidrug-resistant human ovarian carcinoma cells (2780AD) and was more potent than verapamil. Steady-state 3H-cyclosporin A accumulation at 37 degrees C in 2780AD cells was 60-70% of that in the sensitive A2780 c...

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Detalles Bibliográficos
Autores principales: Broxterman, H. J., Pinedo, H. M., Schuurhuis, G. J., Lankelma, J.
Formato: Texto
Lenguaje:English
Publicado: Nature Publishing Group 1990
Materias:
Research Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1971735/
https://www.ncbi.nlm.nih.gov/pubmed/2390489
Descripción
Sumario:Cyclosporin A (Sandimmune) rapidly induced an increase in daunorubicin accumulation in multidrug-resistant human ovarian carcinoma cells (2780AD) and was more potent than verapamil. Steady-state 3H-cyclosporin A accumulation at 37 degrees C in 2780AD cells was 60-70% of that in the sensitive A2780 cells. A rapid increase of ATP consumption and lactate production was induced in 2780AD cells by verapamil, but not by cyclosporin A. These results suggest that the interactions of cyclosporin A and verapamil with P-glycoprotein, which leads to inhibition of drug transport, have a different mechanistic basis.

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