PMID- 35166055 OWN - NLM STAT- MEDLINE DCOM- 20220630 LR - 20230703 IS - 2326-5205 (Electronic) IS - 2326-5191 (Print) IS - 2326-5191 (Linking) VI - 74 IP - 7 DP - 2022 Jul TI - The Prominent Role of Hematopoietic Peptidyl Arginine Deiminase 4 in Arthritis: Collagen- and Granulocyte Colony-Stimulating Factor-Induced Arthritis Model in C57BL/6 Mice. PG - 1139-1146 LID - 10.1002/art.42093 [doi] AB - OBJECTIVE: Genome-wide association studies have connected PADI4, encoding peptidylarginine deiminase 4 (PAD4), with rheumatoid arthritis (RA). PAD4 promotes neutrophil extracellular trap (NET) formation. This study was undertaken to investigate the origin of PAD4 and the importance of NET formation in a C57BL/6 mouse model of arthritis. METHODS: To permit the effective use of C57BL/6 mice in the collagen-induced arthritis (CIA) model, we introduced the administration of granulocyte colony-stimulating factor (G-CSF) for 4 consecutive days in conjunction with the booster immunization on day 21. Mice with global Padi4 deficiency (Padi4(-/-) ) and mice with hematopoietic lineage-specific Padi4 deficiency (Padi4(Vav1Cre/+) ) were evaluated in the model. RESULTS: G-CSF significantly increased the incidence and severity of CIA. G-CSF-treated mice showed elevated citrullinated histone H3 (Cit-H3) levels in plasma, while vehicle-treated mice did not. Immunofluorescence microscopy revealed deposition of Cit-H3 in synovial tissue in G-CSF-treated mice. Padi4(-/-) mice developed less severe arthritis and had lower levels of serum interleukin-6 and plasma Cit-H3, lower levels of Cit-H4 in synovial tissue, and less bone erosion on micro-computed tomography than Padi4(+/+) mice in the G-CSF-modified CIA model. Similarly, Padi4(Vav1Cre/+) mice developed less severe arthritis, compared with Padi4(fl/fl) mice, and presented the same phenotype as Padi4(-/-) mice. CONCLUSION: We succeeded in developing an arthritis model suitable for use in C57BL/6 mice that is fully compliant with high animal welfare standards. We observed a >90% incidence of arthritis in male mice and detectable NET markers. This model, with some features consistent with human RA, demonstrates that hematopoietic PAD4 is an important contributor to arthritis development and may prove useful in future RA research. CI - (c) 2022 The Authors. Arthritis & Rheumatology published by Wiley Periodicals LLC on behalf of American College of Rheumatology. FAU - Fukui, Shoichi AU - Fukui S AUID- ORCID: 0000-0001-5487-4692 AD - Children's Hospital and Harvard Medical School, Boston, Massachusetts. FAU - Gutch, Sarah AU - Gutch S AD - Boston Children's Hospital, Boston, Massachusetts. FAU - Fukui, Saeko AU - Fukui S AD - Boston Children's Hospital, Boston, Massachusetts. FAU - Cherpokova, Deya AU - Cherpokova D AD - Children's Hospital and Harvard Medical School, Boston, Massachusetts. FAU - Aymonnier, Karen AU - Aymonnier K AD - Children's Hospital and Harvard Medical School, Boston, Massachusetts. FAU - Sheehy, Casey E AU - Sheehy CE AD - Boston Children's Hospital, Boston, Massachusetts. FAU - Chu, Long AU - Chu L AD - Boston Children's Hospital, Boston, Massachusetts. FAU - Wagner, Denisa D AU - Wagner DD AD - Children's Hospital and Harvard Medical School, Boston, Massachusetts. LA - eng GR - R35 HL135765/HL/NHLBI NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't DEP - 20220607 PL - United States TA - Arthritis Rheumatol JT - Arthritis & rheumatology (Hoboken, N.J.) JID - 101623795 RN - 143011-72-7 (Granulocyte Colony-Stimulating Factor) RN - 9007-34-5 (Collagen) RN - EC 3.5.3.15 (Padi4 protein, mouse) RN - EC 3.5.3.15 (Protein-Arginine Deiminase Type 4) RN - EC 3.5.3.15 (Protein-Arginine Deiminases) SB - IM MH - Animals MH - *Arthritis, Experimental/chemically induced/enzymology MH - *Arthritis, Rheumatoid/chemically induced/enzymology MH - Collagen MH - Genome-Wide Association Study MH - Granulocyte Colony-Stimulating Factor MH - Male MH - Mice MH - Mice, Inbred C57BL MH - *Protein-Arginine Deiminase Type 4/metabolism MH - Protein-Arginine Deiminases MH - X-Ray Microtomography PMC - PMC9246839 MID - NIHMS1780108 COIS- Competing interests Authors declare no conflict of interest on this research. EDAT- 2022/02/16 06:00 MHDA- 2022/07/01 06:00 PMCR- 2023/07/01 CRDT- 2022/02/15 05:41 PHST- 2022/01/15 00:00 [revised] PHST- 2021/08/26 00:00 [received] PHST- 2022/02/09 00:00 [accepted] PHST- 2022/02/16 06:00 [pubmed] PHST- 2022/07/01 06:00 [medline] PHST- 2022/02/15 05:41 [entrez] PHST- 2023/07/01 00:00 [pmc-release] AID - 10.1002/art.42093 [doi] PST - ppublish SO - Arthritis Rheumatol. 2022 Jul;74(7):1139-1146. doi: 10.1002/art.42093. Epub 2022 Jun 7.