Abstract
The blocking potency of P- and L-selectin was studied for certain small molecule mannosides and their polyacrylamide (PAA, 30 kDa) conjugates in comparison to SiaLex and fucoidan. Two experimental systems were used: (1) solid phase static assay based on recombinant selectins, and (2) P-selectin dependent rat peritoneal inflammation. βMan-SC6H4NO2-p was four times more potent P-selectin inhibitor as compared to SiaLex. Docking of this molecule onto the P-selectin carbohydrate-binding site demonstrated that a nitro group enabled an electrostatic interaction with residue Lys 84, while the phenyl ring and the CH2 at C-6 contacted the CH2 groups of the same Lys residue. In vivo, βMan-SC6H4NO2-p blocked experimental inflammation better than SiaLex, but significantly lower than fucoidan. In vitro Man-polyacrylic acid conjugates appeared to be very potent inhibitors comparable to fucoidan, uncharged Man-PAA proved rather active, comparable to SiaLex-PAA both in vitro, and in vivo, whereas mannan did not display any P-selectin blocking effect. Published in 2004.
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Pochechueva, T., Galanina, O., Ushakova, N. et al. Uncharged P-selectin blockers. Glycoconj J 20, 91–97 (2003). https://doi.org/10.1023/B:GLYC.0000018583.63140.91
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DOI: https://doi.org/10.1023/B:GLYC.0000018583.63140.91