alexa Whole-cell currents from noncultured human lens epithelium.
Ophthalmology

Ophthalmology

Journal of Clinical & Experimental Ophthalmology

Author(s): Rae JL, Rae JS

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Abstract Perforated patch techniques were used to measure whole-cell ionic currents in freshly dissociated human lens epithelial cells that had not been subjected to culture media or serum. With a 150 mmol/l K+ internal solution, the cells had resting voltages of -27.4 +/- 4.7 mV (mean +/- standard deviation [SD]) and capacitances of 10.4 +/- 2.8 pF (mean +/- SD). The input resistance of the cells was 1.6 +/- 0.7 G omega (mean +/- SD) at large negative voltages. A delayed outwardly rectifying K+ current was found in most cells studied. Current magnitudes of 1-2 nA at +80 mV were common. The current had selectivities, activation time constants, deactivation time constants, open probability versus voltage relationships, and inactivations similar to those of the delayed rectifying K+ current found in many cell types and studied previously in cultured human lens epithelium. These results verify the existence, at high density, of these currents in noncultured human epithelial cells.
This article was published in Invest Ophthalmol Vis Sci and referenced in Journal of Clinical & Experimental Ophthalmology

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