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- W2041244345 abstract "For a comparative study of immunological properties of protein-polymer conjugates, uricase was modified with (a) poly(N-vinylpyrrolidone) 6000 Da, (b) poly(N-acriloylmorpholine) 6000 Da, (c) branched monomethoxypoly(ethylene glycol) 10000 Da, and (d) linear monomethoxypoly(ethylene glycol) 5000 Da. Spectroscopic studies performed by UV, fluorescence, and circular dichroism did not show any relevant difference in protein conformation among the native and the conjugates. Immunological studies showed that both uricase antigenicity and immunogenicity were altered by polymer conjugation to an extent that depended upon the polymer composition; in particular, monomethoxypoly(ethylene glycol) 10000 Da remarkably reduced the protein antigenicity, while unexpectedly, the poly(N-vinylpyrrolidone) derivative presented higher antigenicity than the native protein. In Balb/c mice, the native protein elicited a rapid and intense immunoresponse whereas all the conjugates induced a lower production of anti-native uricase antibodies. The rank order of immunogenicity was native uricase > uricase-poly(N-vinylpyrrolidone) > or = uricase-poly(N-acriloylmorpholine) > uricase-monomethoxypoly(ethylene glycol) 5000 Da > uricase-monomethoxypoly(ethylene glycol) 10000 Da. The four conjugates also induced anti polymer immunoresponse. Anti poly(N-vinylpyrrolidone) and anti poly(N-acriloylmorpholine) antibodies were generated from the first immunization while low levels of anti polymer antibodies were found with both poly(ethylene glycol) conjugates only after the second immunization." @default.
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- W2041244345 date "2001-06-09" @default.
- W2041244345 modified "2023-10-07" @default.
- W2041244345 title "Immunological Properties of Uricase Conjugated to Neutral Soluble Polymers" @default.
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- W2041244345 doi "https://doi.org/10.1021/bc000119x" @default.
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