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• W2091773345 abstract "ObjectivesRedox-reactive antibodies, mainly of the IgG class, gained a wide area of interest after their autoimmune reactivity was revealed following the application of chemical and physiological oxidants. In this study, we examined the susceptibility of IgMs to oxidation and evaluated their binding to the autoantigens important in some autoimmune diseases.MethodsIgM and IgG fractions, isolated from healthy individuals’ sera, were oxidized using direct electric current or physiological oxidant hemin. Specificities towards beta-2-glycoprotein I (β2-GPI), cardiolipin (CL), and rheumatoid factor were evaluated with the enzyme-linked immunosorbent assays (ELISAs). Post-translational modification was investigated by 2,4-dinitrophenylhydrazine reaction.ResultsElectrochemically oxidized IgM fractions exhibited altered immunoreactivity – low to medium titers in anti-CL and low positive titers in anti-β2-GPI ELISA but exhibited no rheumatoid factor reactivity. Oxidized IgG and IgM fractions exhibited 2.5- and 5-fold increase in the carbonyl content, respectively.DiscussionAn increase in the carbonyl content along with increased immunoreactivity after oxidation suggests modifications of the IgM paratopes. These results point towards possible modifications of native IgMs to their autoimmune state despite the fact that IgMs were less susceptible to oxidation than IgGs. The importance of an individual's redox status in maintenance of autoimmune reactions was emphasized by in vitro diagnostic tests." @default.
• W2091773345 created "2016-06-24" @default.
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• W2091773345 date "2011-11-01" @default.
• W2091773345 modified "2023-09-24" @default.
• W2091773345 title "Autoimmune reactivity of IgM acquired after oxidation" @default.
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• W2091773345 doi "https://doi.org/10.1179/174329211x13190184351680" @default.
• W2091773345 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6837365" @default.
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