Linked Life Data

2888550

Source:http://linkedlifedata.com/resource/pubmed/id/2888550

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1987-11-12
pubmed:abstractText
The in-vivo reaction of the plasma GH concentration to the administration of the somatostatin analogue SMS 201-995, bromocriptine and their combination were compared with the in-vitro effects of both compounds and their combination on GH release and the GH tumour cell content of 9 acromegalic patients. Exposure of cultured GH-secreting pituitary tumour cells for 4-96 h to SMS 201-995 showed a variable, but in all instances during longer incubations statistically significant inhibition of GH release, which paralleled the sensitivity of GH secretion to the drug in vivo. This inhibitory effect on GH release was in two of the eight tumours accompanied by a decrease in the GH tumour cell content after 24-72 h of culture. These changes either reflect an inhibition of GH synthesis and/or an increase in intracellular breakdown (crinophagy) of GH and might be the basis for the tumour shrinkage which has been observed in about half of the acromegalic patients during long-term SMS 201-995 therapy. The inhibitory effects of bromocriptine on GH secretion were antagonized by haloperidol, while the inhibitory effect of SMS 201-995 was not affected by the dopamine receptor antagonist. This suggests that the effects of SMS 201-995 and bromocriptine are mediated via separate mechanisms involving different receptors. Additive but no potentiating inhibitory effects of both drugs on GH release were observed in a group of six patients in vivo and in three of six tumours in vitro.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
0300-0664
pubmed:author
pubmed:issnType
Print
pubmed:volume
27
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
11-23
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1987
pubmed:articleTitle
A comparison between the effects of SMS 201-995, bromocriptine and a combination of both drugs on hormone release by the cultured pituitary tumour cells of acromegalic patients.
pubmed:affiliation
Department of Medicine, Erasmus University, Rotterdam, The Netherlands.
pubmed:publicationType
Journal Article, Comparative Study