Linked Life Data

9758446

Source:http://linkedlifedata.com/resource/pubmed/id/9758446

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1998-10-9
pubmed:abstractText
This study has determined in rats the ontogenetic schedule of the onset of pituitary prolactin (PRL) synthesis and release as well as of the establishment of the dopamine (DA) inhibitory control of PRL secretion. RIA recognized PRL traces in the pituitary at the 18th embryonic day (E18), although a clearly detectable amount of this hormone was first measured at E20, suggesting the onset of PRL synthesis. The PRL level in the pituitary increased significantly by E22, in females to a higher extent than in males. Decapitation of fetuses did not cause any change in the PRL plasma level in males showing no PRL release from the pituitary until term. Conversely, there was a slight but significant fall of plasma PRL in decapitated females, suggesting PRL release from the pituitary. An inhibition of DA receptors on lactotropes of fetuses resulted in an increased level of plasma PRL at E20, but not at E18, while the pituitary content of PRL remained unchanged. The same treatment at E22 caused a significant increase of the PRL concentration in plasma and a concomitant fall in the pituitary that could be prevented by preliminary encephalectomy. These data show that the tuberoinfundibular DA system begins to inhibit PRL release from lactotropes between E20 and E22, completely arresting PRL release from the pituitary in males but not in females.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
0804-4643
pubmed:author
pubmed:issnType
Print
pubmed:volume
139
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
337-42
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1998
pubmed:articleTitle
Prolactin secretion and its dopamine inhibitory control in rat fetuses.
pubmed:affiliation
Laboratory of Hormonal Regulations, Institute of Developmental Biology, Russian Academy of Sciences, Moscow.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't