PMID- 20042672 OWN - NLM STAT- MEDLINE DCOM- 20100316 LR - 20211020 IS - 1525-2191 (Electronic) IS - 0002-9440 (Print) IS - 0002-9440 (Linking) VI - 176 IP - 2 DP - 2010 Feb TI - Plasmacytoid dendritic cells control lung inflammation and monocyte recruitment in indirect acute lung injury in mice. PG - 764-73 LID - 10.2353/ajpath.2010.090765 [doi] AB - Indirect acute lung injury (ALI, not caused by a direct insult to the lung) represents the first organ dysfunction in trauma patients, with nonpulmonary sepsis being the most common cause of indirect ALI. Dendritic cells (DCs) are thought to participate in a number of inflammatory lung diseases; however, their role in indirect ALI is currently not established. Using a clinically relevant model of indirect ALI induced in mice by hemorrhagic shock followed 24 hours later by polymicrobial septic challenge, we report that mature DC numbers were markedly increased in the lung during indirect ALI. DC depletion induced a significant increase in indirect ALI severity, which was associated with enhanced lung and plasma proinflammatory cytokine concentration and recruitment of proinflammatory CD115(+) monocytes in response to increased lung monocyte chemotactic protein-1 production. Among the different DC subpopulations, plasmacytoid DCs, which were induced and activated in the lung during indirect ALI, were responsible for this effect because their specific depletion reproduced the observations made in DC-depleted mice. As the recruitment of monocytes to the lung plays a central deleterious role in the pathophysiology of indirect ALI, our data therefore position plasmacytoid DCs as important regulators of acute lung inflammation. FAU - Venet, Fabienne AU - Venet F AD - Division of Surgical Research, Rhode Island Hospital/Brown University, Providence, RI 02903, USA. FAU - Huang, Xin AU - Huang X FAU - Chung, Chun-Shiang AU - Chung CS FAU - Chen, Yaping AU - Chen Y FAU - Ayala, Alfred AU - Ayala A LA - eng GR - R01 HL073525/HL/NHLBI NIH HHS/United States GR - S10 RR021051/RR/NCRR NIH HHS/United States GR - R01 HL73525/HL/NHLBI NIH HHS/United States GR - 1S10RR021051-01A2/RR/NCRR NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural DEP - 20091230 PL - United States TA - Am J Pathol JT - The American journal of pathology JID - 0370502 RN - 0 (Cell Adhesion Molecules) RN - 0 (Hbegf protein, mouse) RN - 0 (Heparin-binding EGF-like Growth Factor) RN - 0 (Intercellular Signaling Peptides and Proteins) RN - 0 (Nectins) SB - IM MH - Acute Lung Injury/complications/genetics/immunology/*pathology MH - Animals MH - Cell Adhesion Molecules/genetics MH - Cell Count MH - Cells, Cultured MH - Chemotaxis, Leukocyte/*physiology MH - Dendritic Cells/pathology/*physiology MH - Disease Models, Animal MH - Heparin-binding EGF-like Growth Factor MH - Intercellular Signaling Peptides and Proteins/genetics MH - Male MH - Mice MH - Mice, Inbred C57BL MH - Mice, Transgenic MH - Monocytes/pathology/*physiology MH - Nectins MH - Pneumonia/etiology/genetics/*immunology/pathology MH - Severity of Illness Index PMC - PMC2808083 EDAT- 2010/01/01 06:00 MHDA- 2010/03/17 06:00 PMCR- 2011/02/01 CRDT- 2010/01/01 06:00 PHST- 2010/01/01 06:00 [entrez] PHST- 2010/01/01 06:00 [pubmed] PHST- 2010/03/17 06:00 [medline] PHST- 2011/02/01 00:00 [pmc-release] AID - S0002-9440(10)60390-2 [pii] AID - 10.2353/ajpath.2010.090765 [doi] PST - ppublish SO - Am J Pathol. 2010 Feb;176(2):764-73. doi: 10.2353/ajpath.2010.090765. Epub 2009 Dec 30.