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- W1964294267 abstract "High hydrodynamic volume, high viscosity and high colloidal osmotic pressure (COP) of PEGylated hemoglobin (Hb) have been suggested to neutralize the vasoactivity of acellular Hb. Consequences of non-conservative PEGylation (positive charge of the amino groups at the PEGylation sites is neutralized) using succinimidyl-ester of propionic acid PEG5K on the properties of PEGylated Hb have now been investigated. Non-conservative PEGylation of Hb leads to a much higher increase in the COP and viscosity of Hb than conservative extension arm facilitated (EAF) PEGylation of Hb. Introduction of alphaalpha-fumaryl crosslinking decreased the COP of non-conservative PEGylated Hb by stabilization of interdimeric interactions. Compared to the EAF-PEGylated alphaalpha-fumaryl Hb, non-conservative PEGylated product shows a comparable COP and higher viscosity. Conservative PEGylation of alphaalpha-fumaryl Hb by reductive alkylation chemistry does not increase the COP to this level, but enhanced the molecular volume and viscosity comparable to EAF-PEGylated product. Thus, the molecular properties of PEGylated Hb can be fine tuned using different PEGylation platforms and provide a unique opportunity for the design of second generation PEGylated Hbs." @default.
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- W1964294267 date "2008-10-01" @default.
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- W1964294267 title "Non-conservative surface decoration of hemoglobin: Influence of neutralization of positive charges at PEGylation sites on molecular and functional properties of PEGylated hemoglobin" @default.
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- W1964294267 doi "https://doi.org/10.1016/j.bbapap.2008.03.014" @default.
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