Linked Life Data

3546348

Source:http://linkedlifedata.com/resource/pubmed/id/3546348

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1987-3-31
pubmed:abstractText
Dihydrotestosterone heptanoate (DHT-hp), a seven-carbon fatty acid ester of DHT, was synthesized, and its pharmacokinetics and effects on hypothalamic-pituitary-testicular function were determined in men and pubertal boys. Plasma DHT levels markedly increased 24 h after im injection of DHT-hp, reached their peak during the first week, and fell to baseline levels after 4-6 weeks. An estimated 43-55% of DHT-hp was converted to DHT 4-6 weeks after injection. Plasma testosterone, estradiol, LH, and FSH levels decreased by 4 days after DHT-hp injection, were lowest during the second week, and returned to baseline values after 4-6 weeks. The LH and FSH responses to GnRH were diminished by chronic administration of DHT-hp to pubertal boys at 3-week intervals for 15 weeks. The affinity of DHT-hp was 100 times less than the affinity of DHT for the human androgen receptor, and no affinity for the estrogen receptor in breast tissue could be demonstrated. Since DHT is a nonaromatizable androgen, and neither DHT nor DHT-hp binds readily to the estrogen receptor, suppression of LH and FSH secretion by this drug probably occurs via an androgen-dependent mechanism. Receptor binding and pharmacokinetic data indicate that unesterified DHT is the active principle. DHT-hp is a useful derivative of DHT, since prompt, predictable, and sustained rises in DHT occur after its administration.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
AIM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
0021-972X
pubmed:author
pubmed:issnType
Print
pubmed:volume
64
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
557-62
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1987
pubmed:articleTitle
Dihydrotestosterone heptanoate: synthesis, pharmacokinetics, and effects on hypothalamic-pituitary-testicular function.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.