PMID- 22936024 OWN - NLM STAT- MEDLINE DCOM- 20130212 LR - 20240210 IS - 1521-4141 (Electronic) IS - 0014-2980 (Linking) VI - 42 IP - 12 DP - 2012 Dec TI - CD64 distinguishes macrophages from dendritic cells in the gut and reveals the Th1-inducing role of mesenteric lymph node macrophages during colitis. PG - 3150-66 LID - 10.1002/eji.201242847 [doi] AB - Dendritic cells (DCs) and monocyte-derived macrophages (MPhis) are key components of intestinal immunity. However, the lack of surface markers differentiating MPhis from DCs has hampered understanding of their respective functions. Here, we demonstrate that, using CD64 expression, MPhis can be distinguished from DCs in the intestine of both mice and humans. On that basis, we revisit the phenotype of intestinal DCs in the absence of contaminating MPhis and we delineate a developmental pathway in the healthy intestine that leads from newly extravasated Ly-6C(hi) monocytes to intestinal MPhis. We determine how inflammation impacts this pathway and show that T cell-mediated colitis is associated with massive recruitment of monocytes to the intestine and the mesenteric lymph node (MLN). There, these monocytes differentiate into inflammatory MPhis endowed with phagocytic activity and the ability to produce inducible nitric oxide synthase. In the MLNs, inflammatory MPhis are located in the T-cell zone and trigger the induction of proinflammatory T cells. Finally, T cell-mediated colitis develops irrespective of intestinal DC migration, an unexpected finding supporting an important role for MLN-resident inflammatory MPhis in the etiology of T cell-mediated colitis. CI - (c) 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. FAU - Tamoutounour, Samira AU - Tamoutounour S AD - Centre d'Immunologie de Marseille-Luminy, Aix Marseille Universite, Marseille, France. FAU - Henri, Sandrine AU - Henri S FAU - Lelouard, Hugues AU - Lelouard H FAU - de Bovis, Beatrice AU - de Bovis B FAU - de Haar, Colin AU - de Haar C FAU - van der Woude, C Janneke AU - van der Woude CJ FAU - Woltman, Andrea M AU - Woltman AM FAU - Reyal, Yasmin AU - Reyal Y FAU - Bonnet, Dominique AU - Bonnet D FAU - Sichien, Dorine AU - Sichien D FAU - Bain, Calum C AU - Bain CC FAU - Mowat, Allan McI AU - Mowat AM FAU - Reis e Sousa, Caetano AU - Reis e Sousa C FAU - Poulin, Lionel F AU - Poulin LF FAU - Malissen, Bernard AU - Malissen B FAU - Guilliams, Martin AU - Guilliams M LA - eng GR - 15689/CRUK_/Cancer Research UK/United Kingdom GR - MRC_/Medical Research Council/United Kingdom GR - WT_/Wellcome Trust/United Kingdom PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20121017 PL - Germany TA - Eur J Immunol JT - European journal of immunology JID - 1273201 RN - 0 (Antigens, Ly) RN - 0 (Ly-6C antigen, mouse) RN - 0 (Receptors, IgG) SB - IM CIN - Eur J Immunol. 2012 Dec;42(12):3136-40. PMID: 23255010 MH - Animals MH - Antigens, Ly/immunology MH - Cell Differentiation/immunology MH - Colitis/*immunology/pathology MH - Dendritic Cells/*immunology/pathology MH - Humans MH - Immunity, Mucosal MH - Intestinal Mucosa/*immunology/pathology MH - Lymph Nodes/*immunology/pathology MH - Macrophages/*immunology/pathology MH - Mesentery/*immunology/pathology MH - Mice MH - Mice, Knockout MH - Monocytes/immunology/pathology MH - Receptors, IgG/*immunology MH - Th1 Cells/*immunology/pathology EDAT- 2012/09/01 06:00 MHDA- 2013/02/13 06:00 CRDT- 2012/09/01 06:00 PHST- 2012/07/20 00:00 [received] PHST- 2012/08/26 00:00 [revised] PHST- 2012/08/28 00:00 [accepted] PHST- 2012/09/01 06:00 [entrez] PHST- 2012/09/01 06:00 [pubmed] PHST- 2013/02/13 06:00 [medline] AID - 10.1002/eji.201242847 [doi] PST - ppublish SO - Eur J Immunol. 2012 Dec;42(12):3150-66. doi: 10.1002/eji.201242847. Epub 2012 Oct 17.