PMID- 34069671 OWN - NLM STAT- MEDLINE DCOM- 20210702 LR - 20210702 IS - 1422-0067 (Electronic) IS - 1422-0067 (Linking) VI - 22 IP - 10 DP - 2021 May 19 TI - The CD200 Regulates Inflammation in Mice Independently of TNF-alpha Production. LID - 10.3390/ijms22105358 [doi] LID - 5358 AB - Inflammatory bowel disease is characterized by the infiltration of immune cells and chronic inflammation. The immune inhibitory receptor, CD200R, is involved in the downregulation of the activation of immune cells to prevent excessive inflammation. We aimed to define the role of CD200R ligand-CD200 in the experimental model of intestinal inflammation in conventionally-reared mice. Mice were given a dextran sodium sulfate solution in drinking water. Bodyweight loss was monitored daily and the disease activity index was calculated, and a histological evaluation of the colon was performed. TNF-alpha production was measured in the culture of small fragments of the distal colon or bone marrow-derived macrophages (BMDMs) cocultured with CD200(+) cells. We found that Cd200(-/-) mice displayed diminished severity of colitis when compared to WT mice. Inflammation significantly diminished CD200 expression in WT mice, particularly on vascular endothelial cells and immune cells. The co-culture of BMDMs with CD200(+) cells inhibited TNF-alpha secretion. In vivo, acute colitis induced by DSS significantly increased TNF-alpha secretion in colon tissue in comparison to untreated controls. However, Cd200(-/-) mice secreted a similar level of TNF-alpha to WT mice in vivo. CD200 regulates the severity of DSS-induced colitis in conventionally-reared mice. The presence of CD200(+) cells decreases TNF-alpha production by macrophages in vitro. However, during DDS-induced intestinal inflammation secretion of TNF-alpha is independent of CD200 expression. FAU - Tonecka, Katarzyna AU - Tonecka K AD - Department of Immunology, Medical University of Warsaw, 02-097 Warsaw, Poland. FAU - Braniewska, Agata AU - Braniewska A AD - Department of Immunology, Medical University of Warsaw, 02-097 Warsaw, Poland. FAU - Pilch, Zofia AU - Pilch Z AD - Department of Immunology, Medical University of Warsaw, 02-097 Warsaw, Poland. FAU - Sas, Zuzanna AU - Sas Z AD - Department of Immunology, Medical University of Warsaw, 02-097 Warsaw, Poland. FAU - Skorzynski, Marcin AU - Skorzynski M AD - Department of Immunology, Medical University of Warsaw, 02-097 Warsaw, Poland. FAU - Manuali, Elisabetta AU - Manuali E AUID- ORCID: 0000-0003-3680-0926 AD - Laboratory of Veterinary and Comparative Histopathology, Istituto Zooprofilattico Sperimentale Umbria e Marche "Togo Rosati", 06126 Perugia, Italy. FAU - Rygiel, Tomasz P AU - Rygiel TP AUID- ORCID: 0000-0003-4746-6505 AD - Department of Immunology, Medical University of Warsaw, 02-097 Warsaw, Poland. LA - eng GR - HOMING PLUS/2011-4/10/Fundacja na rzecz Nauki Polskiej/ GR - 2014/15/B/NZ6/03716/Narodowe Centrum Nauki/ PT - Journal Article DEP - 20210519 PL - Switzerland TA - Int J Mol Sci JT - International journal of molecular sciences JID - 101092791 RN - 0 (Antigens, CD) RN - 0 (CD200 receptor, mouse) RN - 0 (Cytokines) RN - 0 (Membrane Glycoproteins) RN - 0 (Receptors, Immunologic) RN - 0 (Tumor Necrosis Factor-alpha) RN - UQ4V77A8VA (antigens, CD200) SB - IM MH - Animals MH - Antigens, CD/*genetics/metabolism MH - Colitis/pathology MH - Colon/pathology MH - Cytokines/metabolism MH - Endothelial Cells/metabolism MH - Female MH - Gene Expression/genetics MH - Gene Expression Regulation/genetics MH - Inflammation/genetics/*immunology MH - Inflammatory Bowel Diseases/metabolism/physiopathology MH - Macrophages/metabolism MH - Male MH - Membrane Glycoproteins/metabolism MH - Mice MH - Mice, Inbred C57BL MH - Mice, Knockout MH - Receptors, Immunologic/metabolism MH - Tumor Necrosis Factor-alpha/immunology/*metabolism PMC - PMC8161250 OTO - NOTNLM OT - CD200 OT - CD200R OT - immune regulation OT - inflammation OT - inflammatory bowel disease OT - myeloid cells COIS- The authors declare no conflict of interest. EDAT- 2021/06/03 06:00 MHDA- 2021/07/03 06:00 PMCR- 2021/05/19 CRDT- 2021/06/02 01:26 PHST- 2021/03/15 00:00 [received] PHST- 2021/05/06 00:00 [revised] PHST- 2021/05/14 00:00 [accepted] PHST- 2021/06/02 01:26 [entrez] PHST- 2021/06/03 06:00 [pubmed] PHST- 2021/07/03 06:00 [medline] PHST- 2021/05/19 00:00 [pmc-release] AID - ijms22105358 [pii] AID - ijms-22-05358 [pii] AID - 10.3390/ijms22105358 [doi] PST - epublish SO - Int J Mol Sci. 2021 May 19;22(10):5358. doi: 10.3390/ijms22105358.