Document Detail


Amino Acid Grafted Chitosan for High Performance Gene Delivery: Comparison of Amino Acid Hydrophobicity on Vector and Polyplex Characteristics.
MedLine Citation:
PMID:  23301560     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
In order to develop a safe, effective, and biocompatible gene delivery vector, a series of hydrophobic amino acid grafted chitosan (AGC) derivatives were synthesized by carbodiimide mediated coupling reaction. Chemical characterization of AGC polymers was performed by NMR and elemental analysis. AGC polymers demonstrated excellent blood compatibility and cell viability as evaluated by hemolysis and MTT assay, respectively. AGC polymers could effectively bind and condense plasmid DNA (pDNA) to form polyplexes in the size range of 161-263 nm and possessed net cationic charge. The resultant polyplex showed 3.4-5.4-fold greater cellular uptake and 13-30-fold higher transfection efficiency in HEK 293 cells as compared to unmodified chitosan. Moreover, both cellular uptake and transfection efficiency improved with the increasing amino acid hydrophobicity. Hydrophobic amino acid substitution contributed to the enhance pDNA release at cytosolic pH. These data demonstrate AGC polymers as a promising novel non-viral gene delivery vector.
Authors:
Buddhadev Layek; Jagdish Singh
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-9
Journal Detail:
Title:  Biomacromolecules     Volume:  -     ISSN:  1526-4602     ISO Abbreviation:  Biomacromolecules     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-10     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100892849     Medline TA:  Biomacromolecules     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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