Induction of an IL7-R+c-Kithi myelolymphoid progenitor critically dependent on IFN-γ signalling during acute malaria

Nikolai N. Belyaev, Douglas E. Brown, Ana-Isabel Garcia Diaz, Aaron Rae, William Jarra, Joanne Thompson, Jean Langhorne, Alexandre Potocnik

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Although the relationship between hematopoietic stem cells and progenitor populations has been investigated extensively under steady-state conditions, the dynamic response of the hematopoietic compartment during acute infection is largely unknown. Here we show that after infection of mice with Plasmodium chabaudi, a c-Kit(hi) progenitor subset positive for interleukin 7 receptor-alpha (IL-7R alpha) emerged that had both lymphoid and myeloid potential in vitro. After being transferred into uninfected alymphoid or malaria-infected hosts, IL-7R alpha(+)c-Kit(hi) progenitors generated mainly myeloid cells that contributed to the clearance of infected erythrocytes in infected hosts. The generation of these infection-induced progenitors was critically dependent on interferon-gamma (IFN-gamma) signaling in hematopoietic progenitors. Thus, IFN-gamma is a key modulator of hematopoiesis and innate and adaptive immunity during acute malaria infection.

Original languageEnglish
Pages (from-to)477-485
Number of pages10
JournalNature Immunology
Issue number6
Publication statusPublished - Jun 2010

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