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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Golzio, Muriel Rols, Marie-pierre Teissie, Justin |
| Description | Author Affiliation: Golzio M ( Institut de Pharmacologie et de Biologie Structurale Centre National de la Recherche Scientifique/Unité Mixte de Recherche-5089, 205, Route de Narbonne, 31077 Toulouse Cedex, France.); |
| Abstract | Electropermeabilization is one of the nonviral methods successfully used to transfer genes into living cells in vitro and in vivo. Although this approach shows promise in the field of gene therapy, very little is known about the basic processes supporting DNA transfer. The present investigation studies this process at the single-cell level by using digitized fluorescence microscopy. Permeabilization is a prerequisite for gene transfer. Its assay by propidium-iodide (PI) penetration shows that it occurs at the sides of the cell membrane facing the two electrodes, whereas fluorescently labeled plasmids only interact with the electropermeabilized side of the cell facing the cathode. The plasmid interaction with the electropermeabilized part of the cell surface results in the formation of localized aggregates. These membrane-associated spots are formed only when pulses with a longer duration than a critical value are applied. These complexes are formed within 1 s after the pulses and cannot be destroyed by pulses of reversed polarities. They remain at the membrane level up to 10 min after pulsing. Although freely accessible to DNA dye (TOTO-1) 1 min after the pulses, they are fully protected when the addition takes place 10 min after. They diffuse in the cytoplasm 30 min after pulses and are present around the nucleus 24 h later. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 3 |
| Volume Number | 99 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2002-02-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Electroporation Luminescent Proteins Genetics Transfection Animals Biological Transport CHO Cells Cell Membrane Physiology Cell Membrane Permeability Cricetinae DNA Electrophysiology Fluorescent Dyes Green Fluorescent Proteins Metabolism Plasmids Recombinant Proteins Thiazoles Research Support, Non-U.S. Gov't Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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