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Human CD14dim monocytes patrol and sense nucleic acids and viruses via TLR7 and TLR8 receptors.

Abstract：

:Monocytes are effectors of the inflammatory response to microbes. Human CD14(+) monocytes specialize in phagocytosis and production of reactive oxygen species and secrete inflammatory cytokines in response to a broad range of microbial cues. Here, we have characterized the functions of human monocytes that lack CD14 (CD14(dim)) and express CD16. CD14(dim) monocytes were genetically distinct from natural killer cells. Gene expression analyses indicated similarities with murine patrolling Gr1(dim) monocytes, and they patrolled the endothelium of blood vessels after adoptive transfer, in a lymphocyte function-associated antigen-1-dependent manner. CD14(dim) monocytes were weak phagocytes and did not produce ROS or cytokines in response to cell-surface Toll-like receptors. Instead, they selectively produced TNF-α, IL-1β, and CCL3 in response to viruses and immune complexes containing nucleic acids, via a proinflammatory TLR7-TLR 8-MyD88-MEK pathway. Thus, CD14(dim) cells are bona fide monocytes involved in the innate local surveillance of tissues and the pathogenesis of autoimmune diseases.

journal_name

Immunity

journal_title

Immunity

authors

Cros J,Cagnard N,Woollard K,Patey N,Zhang SY,Senechal B,Puel A,Biswas SK,Moshous D,Picard C,Jais JP,D'Cruz D,Casanova JL,Trouillet C,Geissmann F

doi

10.1016/j.immuni.2010.08.012

subject

Has Abstract

pub_date

2010-09-24 00:00:00

pages

375-86

issue

3

eissn

1074-7613

issn

1097-4180

pii

S1074-7613(10)00317-1

journal_volume

33

pub_type

杂志文章

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