NK cell-derived interferon-γ orchestrates the cellular dynamics and differentiation of monocytes into inflammatory dendritic cells at the site of infection

Romina S. Goldszmid, Pat Caspar, Aymeric Marie Christian Rivollier, Sandy White, Amiran Dzutsev, Sara Hieny, Brian L. Kelsall, Giorgio Trinchieri, Alan Sher

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Dendritic cells (DCs), monocyte and/or macrophages initiate host-protective immune responses to intracellular pathogens in part through interleukin-12 (IL-12) production, although the relative contribution of tissue resident versus recruited cells has been unclear. Here we showed that after intraperitoneal infection with Toxoplasma gondii cysts, resident mononuclear phagocytes are
replaced by circulating monocytes that differentiate in situ into inflammatory DCs (moDCs) and F4/80+ macrophages. Importantly, NK cell-derived interferon-γ (IFN-γ) was required for both the loss of resident mononuclear phagocytes and the local differentiation of monocytes into macrophages and moDCs. This newly generated moDC population and not the resident DCs (or
macrophages) served as the major source of IL-12 at the site of infection. Thus, NK cell-derived IFN-γ is important in both regulating inflammatory cell dynamics and in driving the local differentiation of monocytes into the cells required for initiating the immune response to an important intracellular pathogen.
Original languageEnglish
JournalImmunity
Volume 36
Issue number6
Pages (from-to)1047–1059
ISSN1074-7613
DOIs
Publication statusPublished - 2012
Externally publishedYes

Cite this

Goldszmid, R. S., Caspar, P., Rivollier, A. M. C., White, S., Dzutsev, A., Hieny, S., Kelsall, B. L., Trinchieri, G., & Sher, A. (2012). NK cell-derived interferon-γ orchestrates the cellular dynamics and differentiation of monocytes into inflammatory dendritic cells at the site of infection. Immunity, 36(6), 1047–1059. https://doi.org/10.1016/j.immuni.2012.03.026