Linked Life Data

9127439

Source:http://linkedlifedata.com/resource/pubmed/id/9127439

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1997-7-10
pubmed:abstractText
There is accumulating evidence that estrogen replacement therapy protects against the development of coronary atherosclerosis and myocardial infarction in postmenopausal women. The mechanism of this protective effect is uncertain. The purpose of the present study was to determine whether 17 beta-estradiol acutely modifies vascular smooth muscle contractile responses to various agonists in human arteries in vitro. Human mammary artery rings were obtained during aortocoronary bypass operations. Rings were suspended in organ baths for isometric tension measurements. Concentration response curves induced by serotonin (0.01-30 mumol/l), histamine (0.01-300 mumol/l), and angiotensin II (0.1-100 nmol/l) were generated after pre-incubation for 30 min with either 17 beta-estradiol (3 mumol/l) or solvent (0.2% ethanol). The presence of 17 beta-estradiol significantly reduced the maximal contractile effects induced by histamine, serotonin, and angiotensin II, but not by 80 mmol/l potassium chloride. It is concluded that short-term incubation with 17 beta-estradiol reduces the maximal contractile responses to serotonin, histamine, and angiotensin II. These modulating effects of estrogen on vascular tone may contribute to the proposed beneficial role of estrogen replacement therapy on the incidence of myocardial infarction in postmenopausal women.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
0031-7012
pubmed:author
pubmed:issnType
Print
pubmed:volume
54
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
162-8
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1997
pubmed:articleTitle
Contractile responses to histamine, serotonin, and angiotensin II are impaired by 17 beta-estradiol in human internal mammary arteries in vitro.
pubmed:affiliation
Division of Cardiology, Hannover Medical School, Germany.
pubmed:publicationType
Journal Article, In Vitro