PMID: 7932570Sep 30, 1994Paper

Polyacrylamides bearing pendant alpha-sialoside groups strongly inhibit agglutination of erythrocytes by influenza A virus: multivalency and steric stabilization of particulate biological systems

Journal of Medicinal Chemistry
W J LeesG M Whitesides


An alpha-sialoside linked to acrylamide by a short connector (5-acetamido-2-O-(N-acryloyl-8-amino-5-oxaoctyl)-2,6-anhydro-3,5-d ideoxy-D-galacto-alpha-nonulopyranosonoic acid, 1) was prepared. Compound 1 formed high molecular weight copolymers with acrylamide, derivatives of acrylamide, and/or vinylpyrrolidone upon photochemically-initiated free radical polymerization. Those copolymers for which the substituents on the acrylamido nitrogen were small inhibited the agglutination of chicken erythrocytes induced by influenza virus (X-31 (H3N2); a recombinant strain of A/Aichi/2/68 (H3N2) and A/Puerto Rico/8/34 grown in chicken eggs). The inhibitory power of the polymers depended strongly on the conditions of polymerization and the sialic acid content of the polymer. The strongest inhibitors were copolymers (poly(1-co-acrylamide)) formed from mixtures of monomer containing [1]/([1] + [acrylamide]) approximately 0.2-0.7; these copolymers inhibited hemagglutination 10(4)-10(5) times more strongly than did similar concentrations of alpha-methyl sialoside (calculated on the basis of the total concentration of individual sialic acid groups in the solution, whether attached to polymer or present as monomers). Samples polymerized in the pr...Continue Reading


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