AIMS: The aim of this study was to investigate genetic variants in the gene neutrophil cytosolic factor 1 (NCF1) for association with rheumatoid arthritis (RA). In rodent models, a single-nucleotide polymorphism (SNP) in Ncf1 has been shown to be a major locus regulating severity of arthritis. Ncf1 encodes one of five subunits of the NADPH oxidase complex. In humans the genomic structure of NCF1 is complex, excluding it from genome-wide association screens and complicating genetic analysis. In addition to copy number variation of NCF1, there are also two nonfunctional pseudogenes, nearly identical in sequence to NCF1. We have characterized copy number variation and SNPs in NCF1, and investigated these variants for association with RA. RESULTS: We find that RA patients are less likely to have an increased copy number of NCF1, 7.6%, compared with 11.6% in controls; p=0.037. We also show that the T-allele of NCF1-339 (rs13447) is expressed in NCF1 and significantly reduces reactive oxygen species production. INNOVATION: This is the first finding of genetic association of NCF1 with RA. The detailed characterization of genetic variants in NCF1 also helps elucidate the complexity of the NCF1 gene. CONCLUSION: These data suggest that an increased copy number of NCF1 can be protective against developing RA and add support to previous findings of a role of NCF1 and the phagocyte NADPH oxidase complex in RA pathogenesis.
AIMS: The aim of this study was to investigate genetic variants in the gene neutrophil cytosolic factor 1 (NCF1) for association with rheumatoid arthritis (RA). In rodent models, a single-nucleotide polymorphism (SNP) in Ncf1 has been shown to be a major locus regulating severity of arthritis. Ncf1 encodes one of five subunits of the NADPH oxidase complex. In humans the genomic structure of NCF1 is complex, excluding it from genome-wide association screens and complicating genetic analysis. In addition to copy number variation of NCF1, there are also two nonfunctional pseudogenes, nearly identical in sequence to NCF1. We have characterized copy number variation and SNPs in NCF1, and investigated these variants for association with RA. RESULTS: We find that RApatients are less likely to have an increased copy number of NCF1, 7.6%, compared with 11.6% in controls; p=0.037. We also show that the T-allele of NCF1-339 (rs13447) is expressed in NCF1 and significantly reduces reactive oxygen species production. INNOVATION: This is the first finding of genetic association of NCF1 with RA. The detailed characterization of genetic variants in NCF1 also helps elucidate the complexity of the NCF1 gene. CONCLUSION: These data suggest that an increased copy number of NCF1 can be protective against developing RA and add support to previous findings of a role of NCF1 and the phagocyte NADPH oxidase complex in RA pathogenesis.
Authors: Dan Li; Bharati Matta; Su Song; Victoria Nelson; Kirsten Diggins; Kim R Simpfendorfer; Peter K Gregersen; Peter Linsley; Betsy J Barnes Journal: JCI Insight Date: 2020-01-30
Authors: Douglas B Kuhns; Amy P Hsu; David Sun; Karen Lau; Danielle Fink; Paul Griffith; Da Wei Huang; Debra A Long Priel; Laura Mendez; Samantha Kreuzburg; Christa S Zerbe; Suk See De Ravin; Harry L Malech; Steven M Holland; Xiaolin Wu; John I Gallin Journal: Blood Adv Date: 2019-01-22
Authors: Jennifer R Heimall; David Hagin; Joud Hajjar; Sarah E Henrickson; Hillary S Hernandez-Trujillo; Yuval Tan; Lisa Kobrynski; Kenneth Paris; Troy R Torgerson; James W Verbsky; Richard L Wasserman; Elena W Y Hsieh; Jack J Blessing; Janet S Chou; Monica G Lawrence; Rebecca A Marsh; Sergio D Rosenzweig; Jordan S Orange; Roshini S Abraham Journal: J Clin Immunol Date: 2018-04-19 Impact factor: 8.317