Abstract
Red cell oxidative stress in P. falciparum infection in vitro was investigated in relation to the G6PD-Malaria hypothesis. Glutathione stability was enhanced in infected red cells; glucose consumption and pentose pathway activity were not different in normal and G6PD deficient cells, although parasite growth was impaired in G6PD deficiency. Evidence for a response to oxidative stress was not found. Infected red cells have glutamate dehydrogenase activity which was not found in uninfected cells. This enzyme provides a separate pathway for the generation of NADPH independent from the pentose shunt. The data suggest that a significant oxidative stress is not present in falciparum malaria and that another mechanism may be operative in G6PD deficiency.
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