A chemistry/physics pathway with nanofibrous scaffolds for gene delivery

文献情報

出版日 2010-08-19
DOI 10.1039/C002515A
インパクトファクター 3.676
著者

Fen Wan, Zhaohui Tang, Weidong He, Benjamin Chu


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要旨

This perspective is to introduce a new pathway for non-viral gene delivery by taking advantage of nanofibrous scaffolds as gene storage devices, gene carriers and homing devices. During gene delivery to the target, the DNA has to be protected in order to pass through a set of barriers before reaching the nucleus. The DNA can form a complex with polycations, and numerous publications exist on how to stabilize the DNA fragments by natural and synthetic materials. Electrospun nanofibrous scaffolds can be used to store the DNA, especially in the form of a more stabilized polyplex, and then to deliver the DNA (polyplex) to cells that are attached to the scaffold. While each essential step has been tested experimentally, the overall yet untested process, especially for in vivo experiments, may lead to a promising specific approach for gene/drug storage and delivery. The pathway described herein is based mainly on our understanding of the physics and chemistry of gene storage and delivery processes, in contrast to using pure biological concepts. Novel biodegradable, biocompatible nanofibrous materials with imbedded DNA (e.g., in the polyplex form) can then be designed to fabricate an intelligent scaffold for gene delivery. To achieve the above goal, the first step is to stabilize the DNA so that it can be incorporated into nanofibrous scaffolds. In this respect, we shall discuss the different methods of DNA/gene condensation and complex formation, and then explain the strategy used to incorporate DNA into electrospun nanofibers. Solvent-induced DNA condensation and then encapsulation were achieved. However, the released naked DNA was not sufficiently protected for gene transfection in cells. The objective of the current perspective is to suggest that, instead of the solvent-induced DNA condensation, one can combine the recently developed polyplex formation by using branched polyethyleneimine (bPEI). More importantly, free bPEI can be incorporated into the nanofibers separately so that during the gene delivery step, the presence of a predesigned amount of free bPEI can greatly increase the gene transfection efficiency, as has been reported recently by Chi Wu and his coworkers. Thus, a physics/chemistry-based pathway that utilizes nanofibrous scaffolds for gene delivery is within reach.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
自己引用率: 10.3%
年間論文数: 3036

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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