Extracellular ATP Modulates Ion Transport via P2Y Purinoceptors in a Middle-Ear Epithelial Cell Line

ORL ◽  
1997 ◽  
Vol 59 (3) ◽  
pp. 170-175 ◽  
Author(s):  
P.-T. Yen ◽  
P. Herman ◽  
T. van den Abbeele ◽  
C.-T. Tan ◽  
P. Bordure ◽  
...  
Keyword(s):  
Epithelial Cell ◽  
Ion Transport ◽  
Cell Line ◽  
Middle Ear ◽  
Extracellular Atp ◽  
Epithelial Cell Line

NCL-SG3: a human eccrine sweat gland cell line that retains the capacity for transepithelial ion transport

1989 ◽  
Vol 92 (2) ◽  
pp. 241-249
Author(s):  
C.M. Lee ◽  
J. Dessi
Keyword(s):  
Epithelial Cell ◽  
Ion Transport ◽  
Cell Line ◽  
Intermediate Filament ◽  
Primary Cultures ◽  
Simian Virus 40 ◽  
T Antigen ◽  
Sweat Glands ◽  
Epithelial Cell Line ◽  
Eccrine Sweat

An ion-transporting human epithelial cell line, NCL-SG3, has been established by simian virus 40 (SV40) infection of primary cultures from eccrine sweat glands. The line has been passaged 38 times (over 100 population doublings), has an aneuploid karyotype but has not undergone any ‘crisis’. The cells have retained epithelial morphology and expression of cytokeratin, the intermediate filament characteristic of epithelial cells. Approximately 85% of the population shows at least weak co-expression of vimentin, an intermediate filament associated with mesenchymal and some other non-epithelial cell types in vivo. In addition, SV40 large T-antigen is present, in a predominantly nuclear localization. Electrically resistant cell sheets are formed on dialysis tubing and cellulose-ester permeable supports. Electrogenic ion transport can be stimulated by the beta-adrenergic agonist isoproterenol (10(−6) M) and by lysylbradykinin (10(−7) M) but not by the cholinergic agonist carbachol at 10(−6) M).

Vasoactive intestinal peptide stimulates protein phosphorylation in a colonic epithelial cell line

1987 ◽  
Vol 253 (3) ◽  
pp. G420-G424 ◽  
Author(s):  
J. A. Cohn
Keyword(s):  
Epithelial Cell ◽  
Ion Transport ◽  
Protein Phosphorylation ◽  
Cell Line ◽  
Vasoactive Intestinal Peptide ◽  
Epithelial Cell Line ◽  
Colonic Epithelial Cell ◽  
Ussing Chambers ◽  
Colonic Epithelial Cell Line ◽  
Stimulation Of

The T84 colonic epithelial cell line was used to examine protein phosphorylation during neurohumoral stimulation of ion transport. T84 cell monolayers grown on collagen-coated filters were mounted in Ussing chambers to measure ion transport stimulated by vasoactive intestinal peptide. Maximal stimulation of active secretion occurred after 8-10 min of stimulation. Protein phosphorylation events accompanying stimulated secretion were detected using two-dimensional gel electrophoresis to resolve phosphoproteins from monolayers previously labeled using 32Pi. Within 8 min of exposure to vasoactive intestinal peptide, several phosphorylation events were detected, including a two- to fivefold increase in 32P incorporation into four soluble proteins with apparent molecular weights of 17,000, 18,000, 23,000, and 37,000. The same phosphorylation response occurs in monolayers stimulated by dibutyryl adenosine 3',5'-cyclic monophosphate (cAMP), suggesting that cAMP mediates these intracellular events. This study indicates that changes in protein phosphorylation accompany the secretory action of vasoactive intestinal peptide and suggests that T84 cells offer a useful model for studying the possibility that such phosphorylation events regulate enterocyte ion transport.

Characterization of a temperature-sensitive mouse middle ear epithelial cell line

2005 ◽  
Vol 125 (8) ◽  
pp. 823-829 ◽  
Author(s):  
Katsuyuki Tsuchiya ◽  
Youngki Kim ◽  
Frank G. Ondrey ◽  
Jizhen Lin
Keyword(s):  
Epithelial Cell ◽  
Cell Line ◽  
Middle Ear ◽  
Epithelial Cell Line ◽  
Temperature Sensitive

scholarly journals Calcium release from intracellular stores evoked by extracellular ATP in a Xenopusrenal epithelial cell line

1997 ◽  
Vol 502 (2) ◽  
pp. 365-373 ◽  
Author(s):  
Masahiro Mori ◽  
Hidenobu Hosomi ◽  
Tomoyuki Nishizaki ◽  
Katsumasa Kawahara ◽  
Yasuhiro Okada
Keyword(s):  
Epithelial Cell ◽  
Cell Line ◽  
Calcium Release ◽  
Extracellular Atp ◽  
Epithelial Cell Line
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