A critical role for the host mediator macrophage migration inhibitory factor in the pathogenesis of malarial anemia

Michael A. McDevitt, Jianlin Xie, Ganapathy Shanmugasundaram, Jason Griffith, Aihua Liu, Courtney McDonald, Philip Thuma, Victor R. Gordeuk, Christine N. Metz, Robert Mitchell, Jeffrey Keefer, John David, Lin Leng, Richard Bucala

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104 Scopus citations


The pathogenesis of malarial anemia is multifactorial, and the mechanisms responsible for its high mortality are poorly understood. Studies indicate that host mediators produced during malaria infection may suppress erythroid progenitor development (Miller, K.L., J.C. Schooley, K.L. Smith, B. Kullgren, L.J. Mahlmann, and P.H. Silverman. 1989. Exp. Hematol. 17:379-385; Yap, G.S., and M.M. Stevenson. 1991. Ann. NY Acad. Sci. 628:279-281). We describe an intrinsic role for macrophage migration inhibitory factor (MIF) in the development of the anemic complications and bone marrow suppression that are associated with malaria infection. At concentrations found in the circulation of malaria-infected patients, MIF suppressed erythropoietin-dependent erythroid colony formation. MIF synergized with tumor necrosis factor and γ interferon, which are known antagonists of hematopoiesis, even when these cytokines were present in subinhibitory concentrations. MIF inhibited erythroid differentiation and hemoglobin production, and it antagonized the pattern of mitogen-activated protein kinase phosphorylation that normally occurs during erythroid progenitor differentiation. Infection of MIF knockout mice with Plasmodium chabaudi resulted in less severe anemia, improved erythroid progenitor development, and increased survival compared with wild-type controls. We also found that human mononuclear cells carrying highly expressed MIF alleles produced more MIF when stimulated with the malarial product hemozoin compared with cells carrying low expression MIF alleles. These data suggest that polymorphisms at the MIF locus may influence the levels of MIF produced in the innate response to malaria infection and the likelihood of anemic complications. JEM

Original languageEnglish (US)
Pages (from-to)1185-1196
Number of pages12
JournalJournal of Experimental Medicine
Issue number5
StatePublished - May 15 2006
Externally publishedYes

ASJC Scopus subject areas

  • Medicine(all)


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