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- W2028604810 endingPage "363" @default.
- W2028604810 startingPage "348" @default.
- W2028604810 abstract "The effectiveness of potentially powerful therapeutics, including DNA, is often limited by their inability to permeate the cell membrane efficiently. Electroporation (EP) also referred to as `electropermeabilization' of the outer cell membrane renders this barrier temporarily permeable by inducing `pores' across the lipid bilayer. For in vivo EP, the drug or DNA is delivered into the interstitial space of the target tissue by conventional means, followed by local EP. EP pulses of micro- to millisecond duration and field strengths of 100–1500 V cm−1 generally enhance the delivery of certain chemotherapeutic drugs by three to four orders of magnitude and intracellular delivery of DNA several hundred-fold. We have used EP in clinical studies for human cancer therapy and in animals for gene therapy and DNA vaccination. Late stage squamous cell carcinomas of the head and neck were treated with intratumoural injection of bleomycin and subsequent EP. Of the 69 tumours treated, 25% disappeared completely and another 32% were reduced in volume by more than half. Residence time of bleomycin in electroporated tumours was significantly greater than in non-electroporated lesions. Histological findings and gene expression patterns after bleomycin-EP treatment indicated rapid apoptosis of the majority of tumour cells. In animals, we demonstrated the usefulness of EP for enhanced DNA delivery by achieving normalization of blood clotting times in haemophilic dogs, and by substantially increasing transgene expression in smooth muscle cells of arterial walls using a novel porous balloon EP catheter. Finally, we have found in animal experiments that the immune response to DNA vaccines can be dramatically enhanced and accelerated by EP and co-injection of micron-sized particles. We conclude that EP represents an effective, economical and safe approach to enhance the intracellular delivery, and thus potency, of important drugs and genes for therapeutic purposes. The safety and pharmaco-economic profile of EP compares favourably with other drug and DNA delivery methods." @default.
- W2028604810 created "2016-06-24" @default.
- W2028604810 creator A5045345765 @default.
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- W2028604810 creator A5060122791 @default.
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- W2028604810 date "2003-01-29" @default.
- W2028604810 modified "2023-09-27" @default.
- W2028604810 title "Enhancement of therapeutic drug and DNA delivery into cells by electroporation*" @default.
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