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        Short-Fragment DNA-Mediated In Vivo DNA Electroporation Delivery

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        Electroporation is an effective physical delivery method. A variety of factors have been shown to affect the electroporation-mediated gene delivery efficiency. Here we report the usefulness of noncoding short-fragment DNA (sf-DNA) for facilitating electroporation-mediated gene transfer. The plasmid pGL3-control encoding firefly luciferase was injected into tissue together with or without sf-DNA in different length or dose. Immediately after injection, the tissues were electroporated and the level of luciferase activity was assessed 24 h later. The results showed that plasmid DNA formulated with sf-DNA resulted in significant improvement in electroporation-mediated gene transfer efficiency. The effect is dose and length dependent, and also found in low-voltage electroporation. These results indicated that sf-DNA can be used as a helper molecule to improve the electroporation-mediated gene transfection efficiency.
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