Differential cytotoxicity of daunomycin in tumour cells is related to glutathione-dependent hydrogen peroxide metabolism

Author:

Bozzi Argante1,Mavelli Irene1,Mondovi Bruno1,Strom Roberto1,Rotilio Giuseppe1

Affiliation:

1. Institutes of Biological Chemistry and Applied Biochemistry, CNR Centre for Molecular Biology, University of Rome, Rome, Italy

Abstract

Addition of 0.5mm-daunomycin, a quinone anti-cancer drug, causes severe inhibition of respiration in Ehrlich ascites cells, whereas Yoshida ascites cells were almost as resistant as rat hepatocytes. An inverse relationship appears to exist in the two types of tumour cells (which are both catalase-deficient) between the extent of cellular damage brought about by intracellular formation of superoxide anion occurring on reaction with O2 of the drug free radical and the efficiency of the glutathione-mediated H2O2-detoxifying system.

Publisher

Portland Press Ltd.

Subject

Cell Biology,Molecular Biology,Biochemistry

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