High molecular weight blood group A trisaccharide-polyacrylamide glycoconjugates as synthetic blood group A antigens for anti-A antibody removal devices.

High molecular weight blood group A trisaccharide-polyacrylamide glycoconjugates as synthetic blood group A antigens for anti-A antibody removal devices.
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DOI:
10.1002/jbm.b.31466
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发表时间:
2009-11
期刊:
Journal of biomedical materials research. Part B, Applied biomaterials
影响因子:
--
通讯作者:
Federspiel WJ
Federspiel WJ
中科院分区:
其他
文献类型:
--
作者:
Alikhani A;Korchagina EY;Chinarev AA;Bovin NV;Federspiel WJ

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Specific immunoadsorption of blood group antibodies by synthetic antigens immobilized on support matrices in the peri-transplantation period provides a promising solution to hyperacute rejection risk following ABO-incompatible transplantation. In this study, we investigated binding interactions between anti-A antibodies and synthetic blood group A trisaccharide conjugated with polyacrylamide of different molecular weights (30 and 1000 kDa). The glycopolymers were equipped with biotin tags and deposited on streptavidin-coated sensor chips. The affinity and kinetics of anti-A antibodies binding to glycoconjugates were studied using surface plasmon resonance (SPR). The high molecular weight conjugate (Atri-PAA1000-biotin) enhanced antibody binding capacity by two to three fold compared to the low molecular weight conjugate (Atri-PAA30-biotin), whereas varying the carbohydrate content in Atri-PAA1000-biotin (20 mol% or 50 mol%) did not affect antibody binding capacity of the glycoconjugate. The obtained results suggest that immunoadsorption devices, especially hollow fiber-based antibody filters which are limited in available surface area for antigen immobilization, may greatly benefit from the new synthetic high molecular weight polyacrylamide glycoconjugates.
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