Abstract
We examined the susceptibility of murine Fas-deficient mutants to malaria infection in order to investigate the role of Fas in an experimental murine model of cerebral malaria (CM). We infected mice of B6 and CBA wild-type and mutant backgrounds with Plasmodium berghei ANKA. The incidence of CM in the mutant mice (B6-lpr, CBA-lprcg) was decreased by about 50% compared with wild-type control strains at 2 weeks after infection. We did not observe significant differences of parasitemia during a murine malaria infection with nonlethal Plasmodium yoelii 17XNL between wild-type and lymphoproliferative (lpr) mutant mice of C3H and MRL genetic backgrounds, although B6-lpr mice exhibited significantly higher parasitemia than did B6 mice 12 to 18 days after infection. These results suggest Fas has a possible role in CM but may not play a major role in the proliferation or exclusion of a murine malaria parasite in a nonlethal infection.
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