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Ligand‐conjugated delivery vectors that target over‐expressed cell surface receptors have a potential impact on gene therapy. In the study reported, high‐molecular‐weight chitosan was depolymerized to medium and low molecular weight and trimethylated to render the polymer soluble over a wider pH range. Folate conjugation was introduced to the quarternized derivative to improve gene transfection efficiency...
Folate receptor mediated gene targeting provides several advantages such as delivery of high concentration of gene at specific tumor sites including brain, lung, ovary, uterus and kidney where folate receptors are over expressed. In the present study for both systemic stability and tumor targeting ability, poly (ethylene glycol)–folic acid (PEG–FA) conjugate was coupled with an arginine modified oligo...
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