Abstract
The hepatic microsomal mixed-function oxidase (MFO) system was markedly impaired during Plasmodium berghei infection in mice. Cytochrome P-450 and other mono-oxygenases, viz. aniline hydroxylase, aminopyrine- N-demethylase and benzo( a)pyrene hydroxylase, were significantly decreased while microsomal heme showed a four-fold increase at peak parasitemia (> 50%). Oral treatment with chloroquine (16 mg kg −1 body wt for 4 days) of P. berghei-infected mice cleared the parasitemia within 72 h and almost normalized the altered levels of MFO indices, a week after cessation of treatment. The findings were further supported by the isoenzymic profile and drug-binding properties of terminal mono-oxygenase, cytochrome P-450.
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