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Echogenic Chitosan Nanodroplets for Spatiotemporally Controlled Gene Delivery

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To attain attractive ultrasound-responsive gene delivery, a new kind of echogenic chitosan nanodroplets (CND) was developed to explore the potential to deliver genes in a spatiotemporally controlled manner. Self-assembled amphiphilic chitosan micelles of nanoscale size were fabricated to encapsulate hydrophobic perfluoropentane into the inner cores. The resulting CND presented a positive surface charge, enabling the formation of nano-complexes with genetic cargo through electrostatic interactions. Agarose-gel electrophoresis further confirmed the ability of CND to bind DNA. CND was also observed to protect DNA from degradation by nucleases. A temperature-dependent droplet-to-bubble conversion was also demonstrated. More importantly, our study revealed that CND in combination with ultrasound could significantly enhance gene delivery. In conclusion, our study demonstrated a novel carrier with great potential for efficient ultrasound-mediated gene delivery to specific tissues in a spatiotemporally controlled manner.
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Document Type: Research Article

Publication date: July 1, 2018

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  • Journal of Biomedical Nanotechnology (JBN) is a peer-reviewed multidisciplinary journal providing broad coverage in all research areas focused on the applications of nanotechnology in medicine, drug delivery systems, infectious disease, biomedical sciences, biotechnology, and all other related fields of life sciences.
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