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• W2004261618 abstract "A kinetic study of the catalytic activity of ferriprotoporphyrin IX in the decomposition of the hydrogen peroxide was carried out at (30.0 ± 0.1)°C, in 0.10 M NaCl, in the absence and in the presence of quinoline-containing antimalarials, i.e., chloroquine, quinine, quinidine, and quinacrine. An inhibitory effect on the catalase activity was observed, for all the studied drugs, at concentrations up to 20 μM. For chloroquine, the determined rate constants, in the range of [catalyst] from 0.5 to 16 μM, were k obs = (2.23±0.06)×10 −2 s −1 and (6.23 ± 0.15) × 10 −3 s −1 , respectively, in the absence and in the presence of the drug. Catalase activity was accompanied by peroxidase activity, as verified by degradative oxidation of the heme itself. Chloroquine inhibited both the catalase and the peroxidase activities of hemin, the latter against the catalyst itself. The effect on the catalase activity, however, is more pronounced. Based on the obtained results, a mechanism is proposed to explain the effect of antimalarials on the reactivity of the ferriprotoporphyrin IX, suggesting that the interaction of the drug with the heme ring plays a fundamental role." @default.
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• W2004261618 date "1997-01-01" @default.
• W2004261618 modified "2023-09-26" @default.
• W2004261618 title "Influence of quinoline-containing antimalarials in the catalase activity of ferriprotoporphyrin IX" @default.
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• W2004261618 doi "https://doi.org/10.1016/s0162-0134(96)00064-5" @default.
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