Dye coupling of rabbit ciliary epithelial cells in vitro.

Abstract:

PURPOSE:To examine the in vitro properties of gap junctions on the isolated rabbit ciliary epithelium. METHODS:Intracellular potential was measured and lucifer yellow (5% in 1 M LiCl) was iontophoretically injected into a ciliary epithelial cell. Fixated tissue was examined with a laser confocal microscope. RESULTS:Dye spread was observed throughout both layers (horizontally and vertically) of the ciliary epithelium adjacent to the injected cell that was more intensely labeled. Dye reflux did not occur at the site of microimpalement. Microiontophoretic dye injection in a bathing solution with a high Ca2+ (10 mM) or an acidic pH (6.3) completely inhibited cell-cell dye coupling in the rabbit ciliary epithelial cells. CONCLUSIONS:Laser confocal microscopy of intracellularly injected lucifer yellow dye demonstrates the physiologic presence of gap junctions between both ciliary epithelial layers. Extracellular acidosis and high concentration of extracellular Ca2+ cause loss of cell-cell coupling in the rabbit ciliary epithelium.

authors

Oh J,Krupin T,Tang LQ,Sveen J,Lahlum RA

subject

Has Abstract

pub_date

1994-04-01 00:00:00

pages

2509-14

issue

5

eissn

0146-0404

issn

1552-5783

journal_volume

35

pub_type

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