1 Padyukov L, Silva C, Stolt P, et al. A gene-environment interaction between smoking and shared epitope genes in HLA-DR provides a high risk of seropositive rheumatoid arthritis. Arthritis & Rheumatism 2004;50:3085–92. doi:10.1002/art.20553
2 Gaalen FAV, Aken JV, Huizinga TWJ, et al. Association between HLA class II genes and autoantibodies to cyclic citrullinated peptides (CCPs) influences the severity of rheumatoid arthritis. Arthritis & Rheumatism 2004;50:2113–21. doi:10.1002/art.20316
3 Moore AR, Iwamura H, Larbre JP, et al. Cartilage degradation by polymorphonuclear leucocytes: in vitro assessment of the pathogenic mechanisms. Ann Rheum Dis 1993;52:27–31. doi:10.1136/ard.52.1.27
4 Nielen MMJ, van Schaardenburg D, Reesink HW, et al. Specific autoantibodies precede the symptoms of rheumatoid arthritis: A study of serial measurements in blood donors. Arthritis & Rheumatism 2004;50:380–6. doi:10.1002/art.20018
5 van Beers JJBC, Schwarte CM, Stammen-Vogelzangs J, et al. The rheumatoid arthritis synovial fluid citrullinome reveals novel citrullinated epitopes in apolipoprotein E, myeloid nuclear differentiation antigen, and β-actin. Arthritis Rheum 2013;65:69–80. doi:10.1002/art.37720
6 Vossenaar ER, Zendman AJW, van Venrooij WJ, et al. PAD, a growing family of citrullinating enzymes: genes, features and involvement in disease. Bioessays 2003;25:1106–18. doi:10.1002/bies.10357
7 Guo Q, Fast W. Citrullination of inhibitor of growth 4 (ING4) by peptidylarginine deminase 4 (PAD4) disrupts the interaction between ING4 and p53. J Biol Chem 2011;286:17069–78. doi:10.1074/jbc.M111.230961
8 Zhang X, Gamble MJ, Stadler S, et al. Genome-wide analysis reveals PADI4 cooperates with Elk-1 to activate c-Fos expression in breast cancer cells. PLoS Genet 2011;7:e1002112. doi:10.1371/journal.pgen.1002112
9 Li P, Li M, Lindberg MR, et al. PAD4 is essential for antibacterial innate immunity mediated by neutrophil extracellular traps. J Exp Med 2010;207:1853–62. doi:10.1084/jem.20100239
10 Suzuki A, Yamada R, Chang X, et al. Functional haplotypes of PADI4, encoding citrullinating enzyme peptidylarginine deiminase 4, are associated with rheumatoid arthritis. Nat Genet 2003;34:395–402. doi:10.1038/ng1206
11 Weissmann G, Korchak H. Rheumatoid arthritis. The role of neutrophil activation. Inflammation 1984;8 Suppl:S3-14.
12 Auer J, Bläss M, Schulze-Koops H, et al. Expression and regulation of CCL18 in synovial fluid neutrophils of patients with rheumatoid arthritis. Arthritis Res Ther 2007;9:R94. doi:10.1186/ar2294
13 Wang C-H, Dai J-Y, Wang L, et al. Expression of CD147 (EMMPRIN) on neutrophils in rheumatoid arthritis enhances chemotaxis, matrix metalloproteinase production and invasiveness of synoviocytes. J Cell Mol Med 2011;15:850–60. doi:10.1111/j.1582-4934.2010.01084.x
14 Hofbauer LC, Heufelder AE. The role of osteoprotegerin and receptor activator of nuclear factor kappaB ligand in the pathogenesis and treatment of rheumatoid arthritis. Arthritis Rheum 2001;44:253–9. doi:10.1002/1529- 0131(200102)44:2<253::AID-ANR41>3.0.CO;2-S
15 Tanaka D, Kagari T, Doi H, et al. Essential role of neutrophils in anti-type II collagen antibody and lipopolysaccharide-induced arthritis. Immunology 2006;119:195–202. doi:10.1111/j.1365-2567.2006.02424.x
16 Matsumoto I, Staub A, Benoist C, et al. Arthritis provoked by linked T and B cell recognition of a glycolytic enzyme. Science 1999;286:1732–5. doi:10.1126/science.286.5445.1732
17 Iwanami K, Matsumoto I, Tanaka Y, et al. Arthritogenic T cell epitope in glucose- 6-phosphate isomerase-induced arthritis. Arthritis Res Ther 2008;10:R130. doi:10.1186/ar2545
18 Schubert D, Maier B, Morawietz L, et al. Immunization with glucose-6-phosphate isomerase induces T cell-dependent peripheral polyarthritis in genetically unaltered mice. J Immunol 2004;172:4503–9. doi:10.4049/jimmunol.172.7.4503
19 Iwanami K, Matsumoto I, Tanaka-Watanabe Y, et al. Crucial role of the interleukin-6/interleukin-17 cytokine axis in the induction of arthritis by glucose- 6-phosphate isomerase. Arthritis Rheum 2008;58:754–63. doi:10.1002/art.23222
20 Pu XP, Iwamoto A, Nishimura H, et al. Purification and characterization of a novel substrate for plasma kallikrein (PK-120) in human plasma. Biochimica et Biophysica Acta (BBA) - Protein Structure and Molecular Enzymology 1994;1208:338–43. doi:10.1016/0167-4838(94)90122-8
21 Cai T, Yu P, Monga SP, et al. Identification of mouse itih-4 encoding a glycoprotein with two EF-hand motifs from early embryonic liver. Biochim Biophys Acta 1998;1398:32–7. doi:10.1016/s0167-4781(98)00049-9
22 Piñeiro M, Alava MA, González-Ramón N, et al. ITIH4 Serum Concentration Increases during Acute-Phase Processes in Human Patients and Is Up-Regulated by Interleukin-6 in Hepatocarcinoma HepG2 Cells. Biochemical and Biophysical Research Communications 1999;263:224–9. doi:10.1006/bbrc.1999.1349
23 Sano Y, Tobe T, Saguchi K, et al. Mouse Inter-Alpha-Trypsin Inhibitor Family Heavy Chain-Related Protein is an Acute Phase Protein Induced by Inflammation. J Health Sci 2006;52:368–74. doi:10.1248/jhs.52.368
24 Kawaguchi H, Matsumoto I, Osada A, et al. Identification of novel biomarker as citrullinated inter-alpha-trypsin inhibitor heavy chain 4, specifically increased in sera with experimental and rheumatoid arthritis. Arthritis Res Ther 2018;20:66. doi:10.1186/s13075-018-1562-7
25 Choi-Miura N-H, Takahashi K, Yoda M, et al. The novel acute phase protein, IHRP, inhibits actin polymerization and phagocytosis of polymorphonuclear cells. Inflamm res 2000;49:305–10. doi:10.1007/PL00000211
26 Okroj M, Holmquist E, Sjölander J, et al. Heavy Chains of Inter Alpha Inhibitor (IαI) Inhibit the Human Complement System at Early Stages of the Cascade. J Biol Chem 2012;287:20100–10. doi:10.1074/jbc.M111.324913
27 Arnett FC, Edworthy SM, Bloch DA, et al. The American Rheumatism Association 1987 revised criteria for the classification of rheumatoid arthritis. Arthritis Rheum 1988;31:315–24.
28 Aletaha D, Neogi T, Silman AJ, et al. 2010 Rheumatoid arthritis classification criteria: an American College of Rheumatology/European League Against Rheumatism collaborative initiative. Arthritis Rheum 2010;62:2569–81. doi:10.1002/art.27584
29 Asaga H, Ishigami A. Protein deimination in the rat brain after kainate administration: citrulline-containing proteins as a novel marker of neurodegeneration. Neurosci Lett 2001;299:5–8.
30 Petri B, Sanz M-J. Neutrophil chemotaxis. Cell Tissue Res 2018;371:425–36. doi:10.1007/s00441-017-2776-8
31 Leshner M, Wang S, Lewis C, et al. PAD4 mediated histone hypercitrullination induces heterochromatin decondensation and chromatin unfolding to form neutrophil extracellular trap-like structures. Front Immunol 2012;3:307. doi:10.3389/fimmu.2012.00307
32 Sur Chowdhury C, Giaglis S, Walker UA, et al. Enhanced neutrophil extracellular trap generation in rheumatoid arthritis: analysis of underlying signal transduction pathways and potential diagnostic utility. Arthritis Res Ther 2014;16:R122. doi:10.1186/ar4579
33 Jin L, Batra S, Jeyaseelan S. Diminished neutrophil extracellular trap (NET) formation is a novel innate immune deficiency induced by acute ethanol exposure in polymicrobial sepsis, which can be rescued by CXCL1. PLoS Pathog 2017;13:e1006637. doi:10.1371/journal.ppat.1006637
34 Rohrbach AS, Hemmers S, Arandjelovic S, et al. PAD4 is not essential for disease in the K/BxN murine autoantibody-mediated model of arthritis. Arthritis Res Ther 2012;14:R104. doi:10.1186/ar3829
35 Khandpur R, Carmona-Rivera C, Vivekanandan-Giri A, et al. NETs are a source of citrullinated autoantigens and stimulate inflammatory responses in rheumatoid arthritis. Sci Transl Med 2013;5:178ra40. doi:10.1126/scitranslmed.3005580
36 Yahagi A, Saika T, Hirano H, et al. IL-6-PAD4 axis in the earliest phase of arthritis in knock-in gp130F759 mice, a model for rheumatoid arthritis. RMD Open 2019;5:e000853. doi:10.1136/rmdopen-2018-000853
37 Eyles JL, Hickey MJ, Norman MU, et al. A key role for G-CSF–induced neutrophil production and trafficking during inflammatory arthritis. Blood 2008;112:5193–201. doi:10.1182/blood-2008-02-139535
38 Wipke BT, Allen PM. Essential Role of Neutrophils in the Initiation and Progression of a Murine Model of Rheumatoid Arthritis. J Immunol 2001;167:1601–8. doi:10.4049/jimmunol.167.3.1601
39 Tarcsa E, Marekov LN, Mei G, et al. Protein unfolding by peptidylarginine deiminase. Substrate specificity and structural relationships of the natural substrates trichohyalin and filaggrin. J Biol Chem 1996;271:30709–16. doi:10.1074/jbc.271.48.30709