Journal
PARASITOLOGY RESEARCH
Volume 86, Issue 2, Pages 121-128Publisher
SPRINGER VERLAG
DOI: 10.1007/s004360050021
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- NIAID NIH HHS [AI34427] Funding Source: Medline
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We analyzed cytokine expression in mice infected with the intraerythrocytic parasites Babesia microti and WA1. In C3H/HeN mice, WA1 infections were fatal, whereas B. microti infections were resolved. We propose that the proinflammatory cytokines tumor necrosis factor-alpha (TNF alpha) and interferon-gamma (IFN gamma) contribute to the WA1-associated disease. WA1 infection was characterized by up-regulation of TNF alpha and IFN gamma mRNA in the spleen. Previous studies in WA1-infected mice showed that pathologic lesions occurred primarily in the lungs, including pulmonary edema and intravascular margination of leukocytes. Analysis of cytokine expression in the lungs is important for an understanding of the disease process in WA1-infected mice. Expression of both TNF alpha and IFN gamma mRNA was increased in the lungs of WA1-infected mice. Immunohistochemical staining confirmed the upregulation of these proinflammatory cytokines in the lungs. Expression of TNF alpha and IFN gamma was not up-regulated in the lungs of B. microti-infected mice. The results implicate TNF alpha and IFN gamma in the pathogenesis of WA1-associated disease.
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