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• W2076875881 abstract "Extracorporeal immunoadsorption (ECI) therapy using Staphylococcal Protein A columns has proven effective for removing autoantibodies and circulating immune complexes from patients selectively, providing a promising treatment for autoimmune diseases. However, due to the drawbacks of Protein A in terms of cost and stability, the widespread use of Protein A based ECI is limited. In this study, we investigated the feasibility of 4-mercaptoethylpyridine (MEP, MW 139 Da), a simple and inexpensive synthetic compound, as an alternative to Protein A for autoantibody removal therapy. MEP-based adsorbents were prepared by coupling MEP to Sepharose CL-6B. We found that ligand density was an adjustable parameter for the synthesis of adsorbents aiming at different pathogenic factors, depending on the class of antibody. MEP-Sepharose with a ligand density of 98.8 micromol/ml could remove 80% of the anti-double-stranded DNA antibodies from human serum, whereas a ligand density of 64.5 micromol/ml was enough to remove 96% of the rheumatoid factor (RF) in the serum. Moreover, MEP-based adsorbents showed a lower degree of individual differences compared to Protein A-Sepharose. RF removal of 90% was achieved for all 12 serum samples from different individuals. Among the 14 serum samples derived from systemic lupus erythematosus patients, 11 samples had markedly reduced antinuclear antibody titers. In addition, non-specific adsorption of plasma components to MEP-Sepharose was limited, and the binding capacity of the absorbent for IgG was still about 20 mg/ml of gel after 10 cycles. The results indicated that MEP-based adsorbent could offer a new type of adsorber for the treatment of autoimmune diseases." @default.
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• W2076875881 date "2009-04-15" @default.
• W2076875881 modified "2023-10-16" @default.
• W2076875881 title "Removal of autoantibodies by 4-mercaptoethylpyridine-based adsorbent" @default.
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• W2076875881 doi "https://doi.org/10.1016/j.jchromb.2009.03.017" @default.
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