Linked Life Data

2411613

Source:http://linkedlifedata.com/resource/pubmed/id/2411613

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1985-10-18
pubmed:abstractText
We examined aspects of the mechanism of desensitization of adenylate cyclase activation by TSH in a cloned line of rat thyroid cells (FRTL). Increasing FRTL intracellular cAMP concentrations by preincubation for 6 h in either 1 mM dBcAMP or 100 microM forskolin did not induce TSH desensitization. Forskolin stimulation was unimpaired in TSH-desensitized cells, indicating 'uncoupling' of the adenylate cyclase catalytic unit from the TSH receptor. Stimulation by the Ni inhibitory pathway of the adenylate cyclase by epinephrine (10(-6) M-10(-4) M in the presence of 10(-4) M propranolol) was unaltered in cells previously desensitized to TSH. That is, Ni-mediated inhibition of adenylate cyclase was additive to TSH desensitization. Pre-exposure of FRTL cells for 18 h to 50 ng/ml pertussis toxin did not prevent the induction of TSH desensitization. TSH desensitization was prevented by cycloheximide or actinomycin D added during the last 3-4 h of a 6 h period of TSH stimulation. The rates of turnover of the putative desensitization protein and its mRNA therefore appear to be similar.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
0303-7207
pubmed:author
pubmed:issnType
Print
pubmed:volume
42
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
21-7
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1985
pubmed:articleTitle
Studies on the mechanism of desensitization of the cyclic AMP response to TSH stimulation in a cloned rat thyroid cell line.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, U.S. Gov't, Non-P.H.S.