Marshall L R Davis1, Tricia D LeVan2, Fang Yu3, Harlan Sayles4, Jeremy Sokolove5, William Robinson6, Kaleb Michaud7, Geoffrey M Thiele8, Ted R Mikuls9. 1. University of Nebraska Medical Center, 986270 Nebraska Medical Center, Omaha, NE 68198-6270, USA. Electronic address: marshall-davis@uiowa.edu. 2. University of Nebraska Medical Center, 986270 Nebraska Medical Center, Omaha, NE 68198-6270, USA; Veterans Affairs (VA) Nebraska-Western Iowa Health Care System, 4101 Woolworth Ave, Omaha, NE 68105, USA. Electronic address: tlevan@unmc.edu. 3. University of Nebraska Medical Center, 986270 Nebraska Medical Center, Omaha, NE 68198-6270, USA. Electronic address: fangyu@unmc.edu. 4. University of Nebraska Medical Center, 986270 Nebraska Medical Center, Omaha, NE 68198-6270, USA. Electronic address: hsayles@unmc.edu. 5. Stanford University School of Medicine CCSR, 269 Campus Drive, Stanford, CA 94305, USA. Electronic address: sokolove@stanford.edu. 6. Stanford University School of Medicine CCSR, 269 Campus Drive, Stanford, CA 94305, USA. Electronic address: wrobins@stanford.edu. 7. University of Nebraska Medical Center, 986270 Nebraska Medical Center, Omaha, NE 68198-6270, USA. Electronic address: kmichaud@unmc.edu. 8. University of Nebraska Medical Center, 986270 Nebraska Medical Center, Omaha, NE 68198-6270, USA; Veterans Affairs (VA) Nebraska-Western Iowa Health Care System, 4101 Woolworth Ave, Omaha, NE 68105, USA. Electronic address: gthiele@unmc.edu. 9. University of Nebraska Medical Center, 986270 Nebraska Medical Center, Omaha, NE 68198-6270, USA; Veterans Affairs (VA) Nebraska-Western Iowa Health Care System, 4101 Woolworth Ave, Omaha, NE 68105, USA. Electronic address: tmikuls@unmc.edu.
Abstract
OBJECTIVE: To examine the associations of toll-like receptor (TLR)-4 single nucleotide polymorphisms (SNPs) with disease progression in rheumatoid arthritis (RA). METHODS: A total of 1188 RA patients were genotyped for TLR4 SNPs (rs1927911, rs11536878, and rs4986790). Measures of disease activity were examined, including Disease Activity Score-28 (DAS28), Multidimensional Health Assessment Questionnaire (MD-HAQ), Clinical Disease Activity Index (CDAI), and Simplified Disease Activity Index (SDAI). Genetic associations with these longitudinal measures were examined using generalized estimating equations in both univariate and multivariate analyses. Analyses were then stratified by antigen specific anti-citrullinated peptide antibody (ACPA) status including antibody to citrullinated fibrinogen and citrullinated histone H2B. RESULTS: Disease activity measures progressed less over time in the homozygous minor allele group of rs1927911 including DAS28 (p<0.001), CDAI (p=0.008), and MD-HAQ (p=0.015) in univariate analysis and DAS28, CDAI and SDAI in multivariate analysis. Disease activity progression among those homozygous for the minor allele tended to be lower in the groups with positive ACPA though major differences by autoantibody status were not identified. There were no associations of TLR4 rs11536878 and rs4986790 SNPs with RA disease activity progression. CONCLUSIONS: In this population, TLR4 rs1927911 genotypes are associated with disease activity independent of other covariates. Published by Elsevier B.V.
OBJECTIVE: To examine the associations of toll-like receptor (TLR)-4 single nucleotide polymorphisms (SNPs) with disease progression in rheumatoid arthritis (RA). METHODS: A total of 1188 RApatients were genotyped for TLR4 SNPs (rs1927911, rs11536878, and rs4986790). Measures of disease activity were examined, including Disease Activity Score-28 (DAS28), Multidimensional Health Assessment Questionnaire (MD-HAQ), Clinical Disease Activity Index (CDAI), and Simplified Disease Activity Index (SDAI). Genetic associations with these longitudinal measures were examined using generalized estimating equations in both univariate and multivariate analyses. Analyses were then stratified by antigen specific anti-citrullinated peptide antibody (ACPA) status including antibody to citrullinated fibrinogen and citrullinated histone H2B. RESULTS: Disease activity measures progressed less over time in the homozygous minor allele group of rs1927911 including DAS28 (p<0.001), CDAI (p=0.008), and MD-HAQ (p=0.015) in univariate analysis and DAS28, CDAI and SDAI in multivariate analysis. Disease activity progression among those homozygous for the minor allele tended to be lower in the groups with positive ACPA though major differences by autoantibody status were not identified. There were no associations of TLR4rs11536878 and rs4986790 SNPs with RA disease activity progression. CONCLUSIONS: In this population, TLR4rs1927911 genotypes are associated with disease activity independent of other covariates. Published by Elsevier B.V.
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