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American Journal of Pathology, Vol 129, 192-199, Copyright © 1987 by American Society for Investigative Pathology
REGULAR ARTICLES |
IA Clark, WB Cowden, GA Butcher and NH Hunt
Department of Zoology, Science Faculty, Australian National University, Canberra.
The authors have earlier proposed that tumor necrosis factor (TNF) might contribute to the pathology of malaria. Here they report the outcome of injecting recombinant human TNF/cachectin into normal mice and others with low parasitemias (6-35%) of Plasmodium vinckei. The object was to see how precisely the pathologic features of the terminal stages of this infection could be produced, when parasitemias are 70- 80%. Hypoglycemia, mid-zonal liver damage, and pulmonary accumulation of neutrophils in the pulmonary vasculature, all of which are seen in severe P vinckei infection, occurred within 4-12 hours after the mildly infected mice received TNF/cachectin. Uninfected mice were much less susceptible. TNF/cachectin also increases plasma lactate, a change seen in both the human and rodent diseases. From these findings and the recent literature on TNF/cachectin, including its detection in serum from malarial patients, it seems likely that excessive release of this monokine could account for certain of the unexplained pathologic features of human malaria.
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