Bone-Marrow-Resident NK Cells Prime Monocytes for Regulatory Function during Infection.
Immunity
; 42(6): 1130-42, 2015 Jun 16.
Article
em En
| MEDLINE
| ID: mdl-26070484
ABSTRACT
Tissue-infiltrating Ly6C(hi) monocytes play diverse roles in immunity, ranging from pathogen killing to immune regulation. How and where this diversity of function is imposed remains poorly understood. Here we show that during acute gastrointestinal infection, priming of monocytes for regulatory function preceded systemic inflammation and was initiated prior to bone marrow egress. Notably, natural killer (NK) cell-derived IFN-γ promoted a regulatory program in monocyte progenitors during development. Early bone marrow NK cell activation was controlled by systemic interleukin-12 (IL-12) produced by Batf3-dependent dendritic cells (DCs) in the mucosal-associated lymphoid tissue (MALT). This work challenges the paradigm that monocyte function is dominantly imposed by local signals after tissue recruitment, and instead proposes a sequential model of differentiation in which monocytes are pre-emptively educated during development in the bone marrow to promote their tissue-specific function.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Toxoplasma
/
Células Dendríticas
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Células da Medula Óssea
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Leucócitos Mononucleares
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Células Matadoras Naturais
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Toxoplasmose
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Mucosa Intestinal
Idioma:
En
Ano de publicação:
2015
Tipo de documento:
Article
País de afiliação:
Estados Unidos