PMID- 33015599 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20201006 IS - 2589-9090 (Electronic) IS - 2589-9090 (Linking) VI - 3 DP - 2020 TI - cDC1 are required for the initiation of collagen-induced arthritis. PG - 100066 LID - 10.1016/j.jtauto.2020.100066 [doi] LID - 100066 AB - Rheumatoid arthritis (RA) is chronic autoimmune disease which etiology remains unknown. Several cell types have been described to potentiate/aggravate the arthritic process however the initiating event in synovial inflammation is still elusive. Dendritic cells (DCs) are essential for the initiation of primary immune responses and thus we hypothesized that these cells might be crucial for RA induction. DCs are a heterogeneous population of cells comprising different subsets with distinct phenotype and function. Here we investigated which DC subset(s) is/are crucial for the initiation of the arthritic process. We have previously demonstrated that Flt3-/- mice, with reduced DCs, were protected from collagen induced arthritis (CIA). Here we have shown that GM-CSF derived DCs in Flt3L-/- mice are functional but not sufficient to induce arthritis. Batf3(-/-) mice lacking both CD103(+) and CD8alpha(+) cDC1 were resistant to collagen induced arthritis (CIA), demonstrating that this DC subset is crucial for arthritis development. CEP-701 (a Flt3L inhibitor) treatment prevented CIA induction, and reduced dramatically the numbers CD103(+) cDC1s present in the lymph nodes and synovium. Hence this study identified cDC1 as the main subset orchestrating the initiation of cell-mediated immunity in arthritis. CI - (c) 2020 Published by Elsevier B.V. FAU - Ramos, Maria Ines AU - Ramos MI AD - Department of Clinical Immunology and Rheumatology. AD - Department of Experimental Immunology, Academic Medical Center/University of Amsterdam, Amsterdam, the Netherlands. FAU - Garcia, Samuel AU - Garcia S AD - Department of Clinical Immunology and Rheumatology. AD - Department of Experimental Immunology, Academic Medical Center/University of Amsterdam, Amsterdam, the Netherlands. FAU - Helder, Boy AU - Helder B AD - Department of Clinical Immunology and Rheumatology. AD - Department of Experimental Immunology, Academic Medical Center/University of Amsterdam, Amsterdam, the Netherlands. FAU - Aarrass, Saida AU - Aarrass S AD - Department of Clinical Immunology and Rheumatology. AD - Department of Experimental Immunology, Academic Medical Center/University of Amsterdam, Amsterdam, the Netherlands. FAU - Reedquist, Kris A AU - Reedquist KA AD - Department of Clinical Immunology and Rheumatology. AD - Department of Experimental Immunology, Academic Medical Center/University of Amsterdam, Amsterdam, the Netherlands. FAU - Jacobsen, Sten E AU - Jacobsen SE AD - Haematopoietic Stem Cell Laboratory and MRC Molecular Haematology Unit, Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, University of Oxford, Oxford, UK. FAU - Tak, Paul Peter AU - Tak PP AD - Department of Clinical Immunology and Rheumatology. FAU - Lebre, Maria Cristina AU - Lebre MC AD - Department of Clinical Immunology and Rheumatology. AD - Department of Experimental Immunology, Academic Medical Center/University of Amsterdam, Amsterdam, the Netherlands. LA - eng PT - Journal Article DEP - 20200916 PL - Netherlands TA - J Transl Autoimmun JT - Journal of translational autoimmunity JID - 101759413 PMC - PMC7522802 OTO - NOTNLM OT - Autoimmunity OT - Dendritic cells OT - Inflammation OT - cDC1 COIS- The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. EDAT- 2020/10/06 06:00 MHDA- 2020/10/06 06:01 PMCR- 2020/09/16 CRDT- 2020/10/05 06:24 PHST- 2020/07/09 00:00 [received] PHST- 2020/09/03 00:00 [revised] PHST- 2020/09/03 00:00 [accepted] PHST- 2020/10/05 06:24 [entrez] PHST- 2020/10/06 06:00 [pubmed] PHST- 2020/10/06 06:01 [medline] PHST- 2020/09/16 00:00 [pmc-release] AID - S2589-9090(20)30033-2 [pii] AID - 100066 [pii] AID - 10.1016/j.jtauto.2020.100066 [doi] PST - epublish SO - J Transl Autoimmun. 2020 Sep 16;3:100066. doi: 10.1016/j.jtauto.2020.100066. eCollection 2020.