phalloidine and 6-carboxyfluorescein

phalloidine has been researched along with 6-carboxyfluorescein* in 2 studies

Other Studies

2 other study(ies) available for phalloidine and 6-carboxyfluorescein

ArticleYear
Reversible and irreversible electroporation of cell suspensions flowing through a localized DC electric field.
    Cellular & molecular biology letters, 2013, Volume: 18, Issue:1

    Experiments on reversible and irreversible cell electroporation were carried out with an experimental setup based on a standard apparatus for horizontal electrophoresis, a syringe pump with regulated cell suspension flow velocity and a dcEF power supply. Cells in suspension flowing through an orifice in a barrier inserted into the electrophoresis apparatus were exposed to defined localized dcEFs in the range of 0-1000 V/cm for a selected duration in the range 10-1000 ms. This method permitted the determination of the viability of irreversibly electroperforated cells. It also showed that the uptake by reversibly electroperforated cells of fluorescent dyes (calcein, carboxyfluorescein, Alexa Fluor 488 Phalloidin), which otherwise do not penetrate cell membranes, was dependent upon the dcEF strength and duration in any given single electrical field exposure. The method yields reproducible results, makes it easy to load large volumes of cell suspensions with membrane non-penetrating substances, and permits the elimination of irreversibly electroporated cells of diameter greater than desired. The results concur with and elaborate on those in earlier reports on cell electroporation in commercially available electroporators. They proved once more that the observed cell perforation does not depend upon the thermal effects of the electric current upon cells. In addition, the method eliminates many of the limitations of commercial electroporators and disposable electroporation chambers. It permits the optimization of conditions in which reversible and irreversible electroporation are separated. Over 90% of reversibly electroporated cells remain viable after one short (less than 400 ms) exposure to the localized dcEF. Experiments were conducted with the AT-2 cancer prostate cell line, human skin fibroblasts and human red blood cells, but they could be run with suspensions of any cell type. It is postulated that the described method could be useful for many purposes in biotechnology and biomedicine and could help optimize conditions for in vivo use of both reversible and irreversible electroporation.

    Topics: Animals; Biological Transport; Cell Line, Tumor; Cell Membrane; Cell Survival; Electricity; Electrophoresis; Electroporation; Erythrocytes; Fibroblasts; Fluoresceins; Fluorescent Dyes; Humans; Male; Phalloidine; Rats

2013
Effects of humidified and dry air on corneal endothelial cells during vitreal fluid-air exchange.
    American journal of ophthalmology, 2002, Volume: 134, Issue:1

    To report the immediate anatomic and functional alterations in corneal endothelial cells following use of humidified air and dry air during vitreal fluid-air exchange in rabbits.. Experimental study.. Rabbits undergoing pars plana vitrectomy and lensectomy were perfused with either dry or humidified air during fluid-air exchange for designated durations. Three different experiments were performed. First, control and experimental corneas were examined by scanning electron microscopy (SEM). Second, corneas were stained with Phalloidin-FITC and examined by fluorescein microscopy. Finally, third, transendothelial permeability for carboxyfluorescein was determined using a diffusion chamber.. While different from the corneal endothelial cells, those cells exposed to humidified air were less stressed than cells exposed to dry air by SEM. Actin cytoskeleton was found highly disorganized with dry air exposure. Humidified air maintained the normal actin cytoskeleton throughout the 20 minutes of fluid-air exchange. Paracellular carboxyfluorescein leakage was significantly higher in dry air insufflated eyes compared with that of the humidified air after 5, 10, and 20 minutes of fluid-air exchange (P =.002, P =.004, and P =.002, respectively).. Dry air stress during fluid-air exchange causes significant immediate alterations in monolayer appearance, actin cytoskeleton, and barrier function of corneal endothelium in aphakic rabbit eyes. Use of humidified air largely prevents the alterations in monolayer appearance, actin cytoskeleton, and barrier function of corneal endothelial cells.

    Topics: Actins; Air; Animals; Cell Membrane Permeability; Cytoskeleton; Endothelium, Corneal; Fluoresceins; Humidity; Isotonic Solutions; Lens, Crystalline; Microscopy, Electron, Scanning; Microscopy, Fluorescence; Perfusion; Phalloidine; Rabbits; Stress, Mechanical; Vitrectomy

2002