Abstract
Clinical and laboratory studies have suggested a pivotal role for tumor necrosis factor alpha (TNFA) in the pathogenesis of rheumatoid arthritis (RA). Interindividual variation in the expression of TNFA indicates the existence of functionally distinct TNFA alleles that could play a role in susceptibility to TNFA-associated diseases such as RA. In order to determine whether differential TNFA gene expression is present in RA, we studied the relative contribution of TNFA alleles to the total amount of steady-state mRNA in peripheral blood mononuclear cells of RA patients and healthy individuals. Moreover, allelic TNFA mRNA expression was analyzed in synovial biopsy material of RA patients. For this purpose, we used the recently identified C-insertion polymorphism located in the 5′ untranslated region of the first exon. The location of this polymorphism within a part of the gene that is transcribed into mRNA allowed us to discriminate between the contribution of each allele to the total amount of TNFA mRNA in heterozygous individuals. The results of this study do not indicate the existence of variation at the level of mRNA transcribed from each TNFA allele by in vitro and physiological stimulation conditions in RA patients. Therefore, our data do not suggest a role for transcriptionally distinct TNFA alleles in the susceptibility to RA.
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Brinkman, B.M.N., Huizinga, T.W.J., Breedveld, F.C. et al. Allele-specific quantification of TNFA transcripts in rheumatoid arthritis. Hum Genet 97, 813–818 (1996). https://doi.org/10.1007/BF02346195
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DOI: https://doi.org/10.1007/BF02346195