Linked Life Data

6155047

Source:http://linkedlifedata.com/resource/pubmed/id/6155047

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1980-7-12
pubmed:abstractText
A comparative analysis of the effects of externally applied Rb+, Cs+, Ba2+ and La3+ on myelinated fibres under potential clamp conditions was made. The ions Cs+, Ba2+ and La3+ (belonging to groups 1a, 2a and 3a of period 6 in the periodic system) were found to affect the K system in specific ways. Ba2+ and La3+ reduced the outward K+ current associated with positive potential steps; the effect of La3+ being larger than that of Ba2+. The effect of Ba2+ depended on the K+ concentration. Cs+, Ba2+ and La3+ reduced the inward K+ tail current at repolarisation in solutions with high K+ concentration. Cs+ and Ba2+ caused a rectification of the K+ current, i.e. they reduced the inward tail current proportionally more than the outward steady state current. The effect of Ba2+ could not be described as a simple reduction of the permeability constant PK. Rb+ was found to affect the time course of the K system by increasing the rate constant beta n. Sr2+, Ba2+ and La3+ reduced the permeability constant PNa. These ions also shifted potential dependent parameters in general along the potential axis. The effect of La3+ was larger than that of Sr2+ and Ba2+. Cs+, Ba2+ and La3+ reduced the p-current, Ba2+ and La3+ the leak conductance.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0001-6772
pubmed:author
pubmed:issnType
Print
pubmed:volume
108
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
7-16
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1980
pubmed:articleTitle
Effects of rubidium, caesium, strontium, barium and lanthanum on ionic currents in myelinated nerve fibres from Xenopus laevis.
pubmed:publicationType
Journal Article, In Vitro