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Sökning: WFRF:(Reddy V) > (2005-2009)

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  • Föregående 12[3]
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  • Rueda, Blanca, et al. (författare)
  • Analysis of IRF5 gene functional polymorphisms in rheumatoid arthritis
  • 2006
  • Ingår i: Arthritis and Rheumatism. - 0004-3591 .- 1529-0131. ; 54:12, s. 3815-3819
  • Tidskriftsartikel (refereegranskat)abstract
    • OBJECTIVE: Recent findings suggest that interferon regulatory factor 5 (IRF-5) may play a crucial role in several cellular processes, including the transcription of genes for inflammatory cytokines. Two genetic variants of the IRF5 gene (rs2004640 in exon 1 and rs2280714 in the 3'-untranslated region) have been shown to exert functional modifications affecting IRF5 messenger RNA splicing and expression, and have been associated with genetic predisposition to systemic lupus erythematosus (SLE). The aim of this study was to analyze the possible contribution of the IRF5 gene to the predisposition to rheumatoid arthritis (RA). METHODS: Three case-control cohorts from Spain (724 RA patients and 542 healthy controls), Sweden (281 RA patients 474 healthy controls), and Argentina (284 RA patients and 286 healthy controls) were independently analyzed. Genotyping for IRF5 rs2004640 and rs2280714 was performed using a TaqMan 5' allele-discrimination assay. RESULTS: In the 3 cohorts studied, no statistically significant differences in allele or genotype frequencies of the rs2004640 and rs2280714 IRF5 polymorphisms were observed between RA patients and controls. Accordingly, haplotype analysis revealed that none of the IRF5 haplotypes was associated with genetic predisposition to RA. CONCLUSION: Our results suggest that the IRF5 functional polymorphisms analyzed do not seem to be implicated in genetic susceptibility to RA.
  • Sánchez, Fabio O, et al. (författare)
  • IFN-Regulatory Factor 5 Gene Variants Interact with the Class I MHC Locus in the Swedish Psoriasis Population
  • 2008
  • Ingår i: Journal of Investigative Dermatology. - 0022-202X .- 1523-1747. ; 128:7, s. 1704-1709
  • Tidskriftsartikel (refereegranskat)abstract
    • Psoriasis is a multifactorial disease of the skin with significant comorbidities of the musculoskeletal and cardiovascular system, which affects 2-3% of the Caucasian population. Failure to regulate prolonged T-helper 1-mediated inflammation is central to psoriasis and is a feature shared with other inflammatory diseases. IFNs are important initiators/regulators of inflammation that among other things can affect the expression of the main genetic determinant in psoriasis, namely HLA-C. Externally administered IFN-alpha, as in patients treated for viral infections, and IFN-alpha produced by plasmacytoid dendritic cells is a known trigger of psoriasis. IFN gamma is characteristically increased in psoriasis lesions. Expression of IFNs is controlled by factors such as IFN-regulatory factor 5 (IRF5) whose polymorphic haplotypes were recently found to associate with increased risk of systemic lupus erythematosus (SLE). The hypothesis underlying this study was that polymorphisms in the IRF5 gene contribute to inadequate control of inflammation in psoriasis. This hypothesis was tested by comparing the distribution of genotypes and haplotypes at IRF5 derived from genotyping single-nucleotide polymorphisms (SNPs) rs2004640, rs2070197, rs10954213, and rs2280714 in psoriasis patients and population-matched controls from the Stockholm Psoriasis Cohort. Polymorphisms at IRF5 did not associate with psoriasis per se; however, an interaction with class I major histocompatibility complex (MHC) genes was found.
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  • Resultat 21-24 av 24
  • Föregående 12[3]

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