Linked Life Data

3495467

Source:http://linkedlifedata.com/resource/pubmed/id/3495467

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1987-7-10
pubmed:abstractText
The larynx of adult South African clawed frogs, Xenopus laevis, is larger in males than in females and hypertrophies in adult females and juveniles in response to androgen. Sexual dimorphism and androgen sensitivity suggest that the larynx is a testosterone target tissue. Saturation analysis of androgen (R1881) binding in laryngeal cytosol revealed an approximately threefold quantitative difference between male and female androgen-binding levels (36.4 vs 11.5 fm/mg protein). By contrast, as measured by one-point assay, androgen-binding levels in thigh muscle of either males or females were between 0 and 4 fm/mg protein with no apparent sex difference. Competition studies indicated that dihydrotestosterone was the most effective competitor for R1881 binding activity in the larynx. Saturation analysis showed the binding activity to be saturable and of high affinity (apparent Kd 0.46 nM in the male and 0.38 nM in the female). After 1 month of testosterone treatment, female binding levels averaged 16.6 fm/mg protein with a Kd of 0.49 nM, within the range for normal females. In males castrated for 4 months, binding levels were 52 fm/mg protein. After 1 year of castration, binding levels were 25 fm/mg protein. We conclude that laryngeal muscle is an androgen target tissue with sexually dimorphic levels of binding in adults.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
0016-6480
pubmed:author
pubmed:issnType
Print
pubmed:volume
66
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
95-101
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1987
pubmed:articleTitle
Androgen-binding levels in a sexually dimorphic muscle of Xenopus laevis.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, U.S. Gov't, P.H.S.