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Author Shelma, R. ♦ Sharma, C. P.
Source Sree Chitra Tirunal Institute for Medical Sciences & Technology
Content type Text
Publisher Colloids and Surfaces B-biointerfaces
File Format PDF
Language English
Subject Domain (in DDC) Technology ♦ Medicine & health
Subject Domain (in MeSH) Biomedical and Dental Materials ♦ Chemicals and Drugs ♦ Immune System Phenomena ♦ Biological Sciences
Subject Keyword Biocompatibility
Abstract Chitosan (CS) has received much attention as a functional biopolymer especially in pharmaceutical applications, but has serious limitations owing to its poor hemo-compatibility property. Present paper focuses on the chemical modification of CS in order to enhance hemocompatibility. Amphiphilic derivative (lauroyl sulfated chitosan, ISCS) was prepared by the inclusion of sulfo group (hydrophilic) and lauroyl group (hydrophobic) to CS backbone and particles were prepared by an ionic-gellation approach. Modification was confirmed by FTIR, NMR and zeta potential measurements and the microparticles were evaluated for its particle size, swelling properties and thermal behaviour. Blood compatibility studies like hemolysis, RBC, WBC, platelet aggregation studies, blood clotting time, protein adsorption and C3 protein depletion assay were carried out for these polymers using standard techniques and cytotoxicity studies were performed to understand its applicability.Negatively charged (-6.06 mV) LSCS submicroparticles (886 nm) were prepared in this study. Blood compatibility studies demonstrated that the amphiphilic modification improved the hemocompatibility of CS. RBC aggregation and hemolysis induced by CS were significantly reduced by this modification. Further amphiphilic modification was effective in reducing the protein adsorption on CS. LSCS derivatives were found to be non-toxic in L929 cell lines. From these studies, it appears that LSCS is a hemocompatible version of CS. (C) 2011 Elsevier B.V. All rights reserved.
Education Level UG and PG
Learning Resource Type Article
Educational Framework Medical Council of India (MCI)
Volume Number 84
Issue Number 2
Page Count 10
Starting Page 561
Ending Page 570