Linked Life Data

2982677

Source:http://linkedlifedata.com/resource/pubmed/id/2982677

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1985-4-17
pubmed:abstractText
hCG is a known stimulator of mouse thyroid in vivo. Studies were therefore performed to ascertain whether the thyroid-stimulating activity of hCG in the mouse could also be demonstrated by the in vitro techniques that had failed to show any activity of hCG in the human thyroid. When labeled with 125I and incubated at 22 degrees C in 20 mM Tris-0.5% bovine serum albumin (Tris-BSA), pH 7.45, with increasing concentrations (70-300 micrograms protein/ml) of a mouse thyroid fraction, a purified hCG preparation [( 125I]hCG) showed 5-12% specific binding. In contrast, its binding to a human thyroid particulate fraction, over the same range of protein concentrations, did not exceed 1%. When similar studies were performed at 37 degrees C in 10 mM Tris-50 mM NaCl-0.5% BSA, pH 7.45, [125I]hCG showed no detectable binding either to the human or the mouse thyroid fractions. At concentrations ranging from 1 to 20 mIU/ml (0.9-18 X 10(-9) M), bTSH stimulated cAMP release from human thyroid slices into the medium in a dose-dependent manner. In contrast, hCG concentrations from 10(3) to 10(4) IU/ml (2-20 X 10(-6) M) were without effect on cAMP release. bTSH, at concentrations of 4.5 and 9.0 mIU/ml (4 and 8 X 10(-9)M), stimulated cAMP release from the mouse thyroid, producing in the medium approximately 11- and 28-fold increases in cAMP concentration. hCG also stimulated cAMP release from the mouse thyroid, the increases being approximately 2.3- and 1.8-fold, in the presence of 2270 and 4540 IU/ml (4.5 and 9.0 X 10(-6) M), respectively.(ABSTRACT TRUNCATED AT 250 WORDS)
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0303-7207
pubmed:author
pubmed:issnType
Print
pubmed:volume
39
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
31-7
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1985
pubmed:articleTitle
Divergent responses by human and mouse thyroids to human chorionic gonadotropin in vitro.
pubmed:publicationType
Journal Article, In Vitro, Research Support, U.S. Gov't, P.H.S.