Linked Life Data

6779375

Source:http://linkedlifedata.com/resource/pubmed/id/6779375

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
49
pubmed:dateCreated
1981-3-27
pubmed:abstractText
The TSH response to exogenous TRH may be diminished or absent not only on overt hyperthyroidism but also in other situations, e.g. obesity, old age, multinodular goiter and depression. To elucidate the possible role of dopaminergic control of the TSH response to TRH in such patients, the oral TRH test (40 mg) was performed with and without simultaneous administration of metoclopramide (10 mg i.v.) in 20 patients known to have diminished or absent response to oral TRH (delta TSH < 1.0 mU/l). All patients had euthyroid basal levels of FT4-index and T3, and may thus be assumed to have "preclinical hyperthyroidism" (TSH suppression syndrome). In 11 patients the history suggested they were free of symptoms of mental depression, while 9 patients were considered by two independent examiners to have various degrees of depression. The TSH response to TRH in depressive patients was significantly increased when the dopamine-receptor-blocker metoclopramide (MCL) wad added. The delta TSH rose from 0.6 +/- 0.3 mU/l (SEM) without MCL to 8.8 +/- 1.8 mU/l with MCL (p < 0.002). In contrast, MCL failed to enhance the TSH response in non-depressive patients: the delta TSH was 0.7 +/- 0.3 mU/l without MCL, and with MCL 2.1 +/- 0.9 mU/l (n.s.). Thus the dopaminergic system appears to play a major role in modulating the sensitivity of the pituitary to TRH stimulation. In clinically doubtful situations, the combined metoclopramide-TRH test may be used to distinguish patients with a diminished or absent TSH response as a consequence of depression (central dopaminergic suppression) from patients with "preclinical hyperthyroidism" where the TSH response is suppressed by feedback control of TSH by thyroid hormones (thyroid autonomy).
pubmed:language
ger
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0036-7672
pubmed:author
pubmed:issnType
Print
pubmed:day
6
pubmed:volume
110
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1877-9
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1980
pubmed:articleTitle
[Effect of the dopamin antagonist metoclopramide on the TSH response after oral TRH in the TSH suppression syndrome ("preclinical hyperthyroidism"). Preliminary report].
pubmed:publicationType
Journal Article, English Abstract, Research Support, Non-U.S. Gov't