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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Abnormal glycosylation of hemopexin in arthritic rats can be blocked by bindarit.

Induction of arthritis in rats with Freund's complete adjuvant was accompanied by a distinctive alteration of concanavalin A (Con-A) reactivity in their serum proteins in which the concentrations of selected Con-A reactive proteins were significantly higher when compared to healthy rats. To assess if the observed increase in Con-A reactivity of specific serum proteins reflects an increase in carbohydrate moieties in these proteins in addition to an increase in their protein concentrations, a heme binding serum glycoprotein, hemopexin, also an acute phase reactant, was selected as a marker protein. Hemopexin was purified to apparent homogeneity from pools of serum samples derived from rats with yeast induced inflammation, a monospecific polyclonal antibody was prepared and was used for immunoblot analysis. It was noted that the concentration of hemopexin increased in rats with adjuvant induced arthritis; however, its concentration fell to normal levels after administration with a newly synthesized drug, bindarit, (2-[(1-benzyl-indazol-3-yl)methoxy]-2-methyl propionic acid, C19H20N2O3. Hemopexin was micropurified individually from healthy rats, adjuvant induced arthritic rats, and adjuvant arthritic rats treated with bindarit, cleaved with a Glu-C endopeptidase, Staphylococcus aureus protease V8, and the resultant peptide fragments resolved by SDS-PAGE and examined by silver staining, Coomassie blue staining, and lectin blots using Con-A. It was subsequently noted that hemopexin isolated from adjuvant induced arthritic rats showed a significant increase in Con-A reactivity in selected peptide fragments and that such an increase in glycosylation could be reversed to a pattern similar to healthy rats following treatment with bindarit.(ABSTRACT TRUNCATED AT 250 WORDS)[1]


  1. Abnormal glycosylation of hemopexin in arthritic rats can be blocked by bindarit. Saso, L., Silvestrini, B., Zwain, I., Guglielmotti, A., Luparini, M.R., Cioli, V., Cheng, C.Y. J. Rheumatol. (1992) [Pubmed]
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