pH-sensitive genipin-cross-linked chitosan microspheres for heparin removal.

Abstract:

:Chitosan hydrogel microspheres were obtained by cross-linking chitosan in its inverse emulsion using genipin as cross-linker. The genipin-cross-linked chitosan microspheres (ChGp) swell significantly in water at pH values below 6.5 and shrink to a smaller extent at pH values above 6.5. ChGp microspheres bind heparin in water. The kinetics of heparin binding was found to be pH dependent and was faster and more efficient at a lower pH. That can be also controlled by the weight of ChGp microspheres used. Rate and efficiency of heparin adsorption at pH 7.4, which is typical of blood, could be increased by quaternization of ChGp microspheres using glycidyltrimethylammonium chloride (GTMAC). The polymeric material obtained thus can be potentially useful for heparin removal in biomedical applications.

journal_name

Biomacromolecules

journal_title

Biomacromolecules

authors

Kamiński K,Zazakowny K,Szczubiałka K,Nowakowska M

doi

10.1021/bm800724q

subject

Has Abstract

pub_date

2008-11-01 00:00:00

pages

3127-32

issue

11

eissn

1525-7797

issn

1526-4602

journal_volume

9

pub_type

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