CFTR-mediated Cl(-) transport in the acinar and duct cells of rabbit lacrimal gland.

Current Eye Research
Michael Lu, Chuanqing Ding

Abstract

We investigated the role that the cystic fibrosis transmembrane conductance regulator (CFTR) may play in Cl(-) transport in the acinar and ductal epithelial cells of rabbit lacrimal gland (LG). Primary cultured LG acinar cells were processed for whole-cell patch-clamp electrophysiological recording of Cl(-) currents by using perfusion media with high and low [Cl(-)], 10 µM forskolin and 100 µM 3-isobutyl-1-methylxanthine (IBMX), the non-specific Cl(-) channel blocker 4,4'-disothiocyanostilbene-2, 2' sulphonic acid (DIDS; 100 µM) and CFTRinh-172 (10 µM), a specific blocker for CFTR. Ex vivo live cell imaging of [Cl(-)] changes in duct cells was performed on freshly dissected LG duct with a multiphoton confocal laser scanning microscope using a Cl(-) sensitive fluorescence dye, N-[ethoxycarbonylmethyl]-6-methoxy-quinolinium bromide. Whole-cell patch-clamp studies demonstrated the presence of Cl(-) current in isolated acinar cells and revealed that this Cl(-) current was mediated by CFTR channel. Live cell imaging also showed the presence of CFTR-mediated Cl(-) transport across the plasma membrane of duct cells. Our previous data showed the presence of CFTR in all acinar and duct cells within the rabbit LG, with expression most pr...Continue Reading

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Citations

Apr 25, 2014·British Journal of Pharmacology·N MelisC Duranton
Nov 15, 2013·Saudi Journal of Ophthalmology : Official Journal of the Saudi Ophthalmological Society·Abdulrahman AlghadyanRobert McMhon
Feb 5, 2016·FASEB Journal : Official Publication of the Federation of American Societies for Experimental Biology·Alyssa M FloresMarc H Levin

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