Linked Life Data

26398

Source:http://linkedlifedata.com/resource/pubmed/id/26398

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1978-8-28
pubmed:abstractText
1. The Na+ uptake in the isolated from skin of Rana esculenta was measured by the short-circuit current (Isc). Uranyl ions increase at pH 5.5 the Isc up to 200% at concentrations of 10 mM. The half-maximal value for this effect is at about 1 mM uranyl salt. 2. The effect is (a) specific for the Na+-selective membrane, (b) fully reversible. No stimulation can be seen in presence of 1 mM H+ or 0.1 mM amiloride. 3. The decrease of the sodium permeability of the apical membrane (PNa), normally induced by increasing concentrations of Na+ in the mucosal solution, %Na]o, is partially prevented by uranyl ions. The apparent Michaelis constant of the saturable Na+ uptake is shifted to much higher values. 4. A comparison between the uranyl effect and similar effects of the other drugs leads to the conclusion that uranyl ions might act in a polar hydrophobic environment, possibly by combining with phosphate groups (of phospholipids), and, thus, enhancing Na+ permeability by changes in tertiary structure near each Na channel. The interaction of mucosal Na+ with their receptor, normally triggering the [Na]o-dependent decrease of PNa, is thought to be diminished by uranyl association in a neighbouring region, causing a noncompetitive stimulation of the Na+ translocation though the apical frog skin membrane.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0006-3002
pubmed:author
pubmed:issnType
Print
pubmed:day
18
pubmed:volume
509
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
218-29
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1978
pubmed:articleTitle
The stimulation of Na+ uptake in frog skin by uranyl ions.
pubmed:publicationType
Journal Article, In Vitro