Switch to
Predicate | Object |
---|---|
rdf:type | |
lifeskim:mentions | |
pubmed:issue |
6
|
pubmed:dateCreated |
1982-4-20
|
pubmed:abstractText |
Relaxing effects of nitroprusside and verapamil on the resting or K-stimulated tension and 45Ca uptake in human umbilical vessels were investigated. Both nitroprusside and verapamil reduced the resting and K-stimulated tensions in a dose-dependent manner. Nitroprusside was much more effective than verapamil in reducing resting tension. However, verapamil caused a greater relaxation of the K-induced contraction than nitroprusside. In a Ca2+-free medium, K+ still caused a small and sustained contraction. Nitroprusside abolished the contraction in the Ca2+-free medium, which verapamil failed to inhibit. Neither nitroprusside nor verapamil affected the resting 45Ca uptake measured by a lanthanum method. The K-induced increase in 45Ca uptake was inhibited by verapamil, but not by nitroprusside. The results suggest that nitroprusside unlike verapamil does not act as a Ca2+ influx inhibitor resulting in the relaxation of human umbilical vessels.
|
pubmed:language |
eng
|
pubmed:journal | |
pubmed:citationSubset |
IM
|
pubmed:chemical |
http://linkedlifedata.com/resource/pubmed/chemical/Calcium,
http://linkedlifedata.com/resource/pubmed/chemical/Ferricyanides,
http://linkedlifedata.com/resource/pubmed/chemical/Nitroprusside,
http://linkedlifedata.com/resource/pubmed/chemical/Parasympatholytics,
http://linkedlifedata.com/resource/pubmed/chemical/Potassium,
http://linkedlifedata.com/resource/pubmed/chemical/Verapamil
|
pubmed:status |
MEDLINE
|
pubmed:issn |
0303-6847
|
pubmed:author | |
pubmed:issnType |
Print
|
pubmed:volume |
18
|
pubmed:owner |
NLM
|
pubmed:authorsComplete |
Y
|
pubmed:pagination |
321-9
|
pubmed:dateRevised |
2006-11-15
|
pubmed:meshHeading |
pubmed-meshheading:7326438-Calcium,
pubmed-meshheading:7326438-Ferricyanides,
pubmed-meshheading:7326438-Humans,
pubmed-meshheading:7326438-Membrane Potentials,
pubmed-meshheading:7326438-Muscle Contraction,
pubmed-meshheading:7326438-Muscle Relaxation,
pubmed-meshheading:7326438-Nitroprusside,
pubmed-meshheading:7326438-Parasympatholytics,
pubmed-meshheading:7326438-Potassium,
pubmed-meshheading:7326438-Umbilical Arteries,
pubmed-meshheading:7326438-Umbilical Veins,
pubmed-meshheading:7326438-Verapamil
|
pubmed:year |
1981
|
pubmed:articleTitle |
A comparative study of the relaxing effect of nitroprusside and verapamil on human umbilical vessels.
|
pubmed:publicationType |
Journal Article,
Research Support, Non-U.S. Gov't
|