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Predicate | Object |
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
3
|
pubmed:dateCreated |
1986-9-17
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pubmed:abstractText |
Alpha-2-adrenoreceptor density on intact platelets was evaluated in 17 sportsmen, 8 of whom were endurance-trained athletes. Receptor density was determined as being equivalent to 3H-Yohimbine, specifically bound on intact platelets. Adrenaline-induced aggregation of platelets in vitro was additionally ascertained. Bmax (maximal binding) and KD (dissociation constant) were significantly lower in endurance-trained athletes (148 fmol per 10(9) platelets, KD = 0.92 nmol) than in the nine nonendurance-trained individuals (284 fmol, KD = 1.79 nmol, P less than 0.01), amounting to 89 receptors per cell (endurance-trained subjects) and 171 (nonendurance-trained subjects). No significant change of receptor density or affinity was observed subsequent to exhaustive exercise in the group of eight endurance-trained individuals. Bmax values and oxygen uptake capacity correlated negatively (r = -0.78, P less than 0.001) and Bmax values and induced platelet aggregation in vitro positively (r = 0.79, P less than 0.001). Data may indicate a reduced sensitivity of platelets in endurance-trained subjects.
|
pubmed:language |
eng
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pubmed:journal | |
pubmed:citationSubset |
IM
|
pubmed:chemical | |
pubmed:status |
MEDLINE
|
pubmed:month |
Jun
|
pubmed:issn |
0172-4622
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pubmed:author | |
pubmed:issnType |
Print
|
pubmed:volume |
7
|
pubmed:owner |
NLM
|
pubmed:authorsComplete |
Y
|
pubmed:pagination |
172-6
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pubmed:dateRevised |
2008-11-21
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pubmed:meshHeading |
pubmed-meshheading:3015811-Adult,
pubmed-meshheading:3015811-Blood Platelets,
pubmed-meshheading:3015811-Epinephrine,
pubmed-meshheading:3015811-Humans,
pubmed-meshheading:3015811-Physical Endurance,
pubmed-meshheading:3015811-Physical Exertion,
pubmed-meshheading:3015811-Platelet Aggregation,
pubmed-meshheading:3015811-Receptors, Adrenergic, alpha,
pubmed-meshheading:3015811-Sports,
pubmed-meshheading:3015811-Tritium,
pubmed-meshheading:3015811-Yohimbine
|
pubmed:year |
1986
|
pubmed:articleTitle |
Alpha-2-adrenoreceptor density on intact platelets and adrenaline-induced platelet aggregation in endurance- and nonendurance-trained subjects.
|
pubmed:publicationType |
Journal Article,
Comparative Study
|