Linked Life Data

3688217

Source:http://linkedlifedata.com/resource/pubmed/id/3688217

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5 Pt 1
pubmed:dateCreated
1988-1-6
pubmed:abstractText
The unidirectional influx of 36Cl- into isolated chick epithelial cells is 30% inhibited by 300 microM SITS. Characteristics of the SITS-sensitive flux pathway were examined in terms of sensitivity to changes in membrane potential and intracellular pH. Potential dependence was evaluated using unidirectional influx of [14C]tetraphenylphosphonium ([14C]-TPP+) as a qualitative sensor of diffusion potentials created by experimentally imposed gradients of Cl-. Steady-state distribution of [14C]methylamine ([14C]MA) was used to examine for Cl(-)-dependent changes in intracellular pH. Imposed Na+ gradients, but not Cl- gradients, induce changes in [14C]MA distribution. SITS does not alter the [14C]MA distribution observed in cells with imposed gradients of Na+ and Cl-. Both results suggest that inhibition of Cl(-)-OH- exchange system is not the basis for the SITS effect on Cl- influx. However, if relative permeabilities for ion pairs via conductance pathways are compared, it can be shown that SITS causes a marked reduction of Pcl relative to either PNa or PK. SITS also inhibits electrically induced influx of [14C]TPP+ or [14C] alpha-methylglucoside driven by imposed Cl- gradients. Conversely, electrically driven Cl- influx can be blocked by SITS. These observations are all consistent with a SITS-sensitive Cl- conductance pathway associated with the plasma membrane of chick intestinal cells. No Cl(-)-OH- exchange capability can be detected for chick intestinal cells.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
0002-9513
pubmed:author
pubmed:issnType
Print
pubmed:volume
253
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
C693-9
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1987
pubmed:articleTitle
SITS-sensitive Cl- conductance pathway in chick intestinal cells.
pubmed:affiliation
Department of Radiation Biology and Biophysics, School of Medicine and Dentistry, University of Rochester, New York 14642.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.