PMID- 35418479 OWN - NLM STAT- MEDLINE DCOM- 20220714 LR - 20220802 IS - 1468-2060 (Electronic) IS - 0003-4967 (Print) IS - 0003-4967 (Linking) VI - 81 IP - 8 DP - 2022 Aug TI - CSF2-dependent monocyte education in the pathogenesis of ANCA-induced glomerulonephritis. PG - 1162-1172 LID - 10.1136/annrheumdis-2021-221984 [doi] AB - OBJECTIVES: Myeloid cell activation by antineutrophil cytoplasmic antibody (ANCA) is pivotal for necrotising vasculitis, including necrotising crescentic glomerulonephritis (NCGN). In contrast to neutrophils, the contribution of classical monocyte (CM) and non-classical monocyte (NCM) remains poorly defined. We tested the hypothesis that CMs contribute to antineutrophil cytoplasmic antibody-associated vasculitis (AAV) and that colony-stimulating factor-2 (CSF2, granulocyte-macrophage colony-stimulating factor (GM-CSF)) is an important monocyte-directed disease modifier. METHODS: Myeloperoxidase (MPO)-immunised MPO(-/-) mice were transplanted with haematopoietic cells from wild-type (WT) mice, C-C chemokine receptor 2 (CCR2)(-/-) mice to abrogate CM, or transcription factor CCAAT-enhancer-binding protein beta (C/EBPbeta)(-/-) mice to reduce NCM, respectively. Monocytes were stimulated with CSF2, and CSF2 receptor subunit beta (CSF2rb)-deficient mice were used. Urinary monocytes and CSF2 were quantified and kidney Csf2 expression was analysed. CSF2-blocking antibody was used in the nephrotoxic nephritis (NTN) model. RESULTS: Compared with WT mice, CCR2(-/-) chimeric mice showed reduced circulating CM and were protected from NCGN. C/EBPbeta(-/-) chimeric mice lacked NCM but developed NCGN similar to WT chimeric mice. Kidney and urinary CSF2 were upregulated in AAV mice. CSF2 increased the ability of ANCA-stimulated monocytes to generate interleukin-1beta and to promote T(H)17 effector cell polarisation. CSF2rb(-/-) chimeric mice harboured reduced numbers of kidney T(H)17 cells and were protected from NCGN. CSF2 neutralisation reduced renal damage in the NTN model. Finally, patients with active AAV displayed increased urinary CM numbers, CSF2 levels and expression of GM-CSF in infiltrating renal cells. CONCLUSIONS: CMs but not NCMs are important for inducing kidney damage in AAV. CSF2 is a crucial pathological factor by modulating monocyte proinflammatory functions and thereby T(H)17 cell polarisation. CI - (c) Author(s) (or their employer(s)) 2022. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ. FAU - Rousselle, Anthony AU - Rousselle A AD - Experimental and Clinical Research Center, Max Delbruck Center for Molecular Medicine in the Helmholtz Association (MDC) and Charite - Universitatsmedizin Berlin, Corporate Member of Freie Universitat Berlin and Humboldt-Universitat zu Berlin, Berlin, Germany. FAU - Sonnemann, Janis AU - Sonnemann J AD - Experimental and Clinical Research Center, Max Delbruck Center for Molecular Medicine in the Helmholtz Association (MDC) and Charite - Universitatsmedizin Berlin, Corporate Member of Freie Universitat Berlin and Humboldt-Universitat zu Berlin, Berlin, Germany. AD - Nephrology and Medical Intensive Care Medicine, Charite-Universitatsmedizin Berlin, Berlin, Germany. FAU - Amann, Kerstin AU - Amann K AD - Department of Nephropathology, University Hospital Erlangen, Friedrich-Alexander-University (FAU) Erlangen-Nurnberg, Erlangen, Germany. FAU - Mildner, Alexander AU - Mildner A AD - Max Delbruck Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin, Germany. FAU - Lodka, Dorte AU - Lodka D AD - Experimental and Clinical Research Center, Max Delbruck Center for Molecular Medicine in the Helmholtz Association (MDC) and Charite - Universitatsmedizin Berlin, Corporate Member of Freie Universitat Berlin and Humboldt-Universitat zu Berlin, Berlin, Germany. FAU - Kling, Lovis AU - Kling L AD - Experimental and Clinical Research Center, Max Delbruck Center for Molecular Medicine in the Helmholtz Association (MDC) and Charite - Universitatsmedizin Berlin, Corporate Member of Freie Universitat Berlin and Humboldt-Universitat zu Berlin, Berlin, Germany. AD - Nephrology and Medical Intensive Care Medicine, Charite-Universitatsmedizin Berlin, Berlin, Germany. FAU - Bieringer, Markus AU - Bieringer M AD - Department of Cardiology and Nephrology, HELIOS Klinik Berlin-Buch, Berlin, Germany. FAU - Schneider, Udo AU - Schneider U AUID- ORCID: 0000-0002-9117-3307 AD - Department of Rheumatology and Clinical Immunology, Charite-Universitatsmedizin Berlin, Berlin, Germany. FAU - Leutz, Achim AU - Leutz A AD - Max Delbruck Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin, Germany. FAU - Enghard, Philipp AU - Enghard P AUID- ORCID: 0000-0002-7254-3931 AD - Nephrology and Medical Intensive Care Medicine, Charite-Universitatsmedizin Berlin, Berlin, Germany. FAU - Kettritz, Ralph AU - Kettritz R AD - Experimental and Clinical Research Center, Max Delbruck Center for Molecular Medicine in the Helmholtz Association (MDC) and Charite - Universitatsmedizin Berlin, Corporate Member of Freie Universitat Berlin and Humboldt-Universitat zu Berlin, Berlin, Germany. AD - Nephrology and Medical Intensive Care Medicine, Charite-Universitatsmedizin Berlin, Berlin, Germany. FAU - Schreiber, Adrian AU - Schreiber A AUID- ORCID: 0000-0003-1244-6379 AD - Experimental and Clinical Research Center, Max Delbruck Center for Molecular Medicine in the Helmholtz Association (MDC) and Charite - Universitatsmedizin Berlin, Corporate Member of Freie Universitat Berlin and Humboldt-Universitat zu Berlin, Berlin, Germany adrian.schreiber@charite.de. AD - Nephrology and Medical Intensive Care Medicine, Charite-Universitatsmedizin Berlin, Berlin, Germany. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20220413 PL - England TA - Ann Rheum Dis JT - Annals of the rheumatic diseases JID - 0372355 RN - 0 (Antibodies, Antineutrophil Cytoplasmic) RN - 83869-56-1 (Granulocyte-Macrophage Colony-Stimulating Factor) RN - EC 1.11.1.7 (Peroxidase) SB - IM MH - Animals MH - *Anti-Neutrophil Cytoplasmic Antibody-Associated Vasculitis/complications/pathology MH - Antibodies, Antineutrophil Cytoplasmic MH - *Glomerulonephritis/etiology/pathology MH - *Granulocyte-Macrophage Colony-Stimulating Factor/metabolism MH - Mice MH - *Monocytes/metabolism MH - Peroxidase PMC - PMC9279749 OTO - NOTNLM OT - Autoantibodies OT - Autoimmune Diseases OT - Granulomatosis with polyangiitis OT - Inflammation OT - Systemic vasculitis COIS- Competing interests: None declared. EDAT- 2022/04/15 06:00 MHDA- 2022/07/15 06:00 PMCR- 2022/07/14 CRDT- 2022/04/14 05:18 PHST- 2021/12/10 00:00 [received] PHST- 2022/04/01 00:00 [accepted] PHST- 2022/04/15 06:00 [pubmed] PHST- 2022/07/15 06:00 [medline] PHST- 2022/04/14 05:18 [entrez] PHST- 2022/07/14 00:00 [pmc-release] AID - annrheumdis-2021-221984 [pii] AID - 10.1136/annrheumdis-2021-221984 [doi] PST - ppublish SO - Ann Rheum Dis. 2022 Aug;81(8):1162-1172. doi: 10.1136/annrheumdis-2021-221984. Epub 2022 Apr 13.