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PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6 Pt 2
pubmed:dateCreated
1985-1-24
pubmed:abstractText
Bovine hypothalamus contains a stable, low molecular weight substance with ouabain-like properties. To further study its mechanism of action and potential physiological importance we examined its effects on purified Na+-K+-ATPase in a kinetic coupled-enzyme assay. Under optimal conditions up to 95% of Na+-K+-ATPase activity could be inhibited by the factor. Mg2+ is required for maximal inhibitory activity, but ligand requirements for optimal activity are otherwise distinct from those of both ouabain and vanadate. Inhibition is reversed by high concentrations of sodium chloride plus EDTA. Kinetic analysis yielded a Ki = 1.4 nM. The hypothalamic factor is a high-affinity reversible inhibitor of Na+-K+-ATPase, being at least as potent as the cardiac glycoside ouabain and may be a circulating inhibitor of sodium transport, which appears to be associated with experimental volume-expanded hypertension and human essential hypertension.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0002-9513
pubmed:author
pubmed:issnType
Print
pubmed:volume
247
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
F919-24
pubmed:dateRevised
2007-11-15
pubmed:meshHeading
pubmed:year
1984
pubmed:articleTitle
Hypothalamic sodium-transport inhibitor is a high-affinity reversible inhibitor of Na+-K+-ATPase.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't