Linked Life Data

11702241

Source:http://linkedlifedata.com/resource/pubmed/id/11702241

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
2001-11-9
pubmed:abstractText
This study was carried out to examine the developmental stage when prolactin cells differentiate in mice and to examine the effects of diethylstilbestrol on the development of prolactin cells in the fetal and neonatal pituitary glands. A small number of immunoreactive prolactin cells appeared first on embryonic day 15 in control (injected with oil) pituitary glands, whereas they did not increase in number until postnatal day 2. In diethylstilbestrol-treated mice (5 mg/kg body weight, 24 h before killing), a small number of immunoreactive prolactin cells were detectable as early as embryonic day 14, but not on day 13. They increased in number on embryonic days 15 and 16, and decreased markedly on days 17 and 18, followed by a rapid increase after birth. This transient reduction in the response to diethylstilbestrol was partially restored by treatment with metyrapone, a specific inhibitor of corticosteroid production. These results suggest that in the mouse: (1) differentiation of prolactin cells occurs between embryonic days 13 and 14, (2) prolactin gene expression is suppressed in the nascent prolactin cells presumably due to the presence of high levels of estrogen-binding protein, alpha-fetoprotein, and (3) prolactin gene expression is also suppressed by elevation of circulating glucocorticoids during the perinatal period. The present results suggest that, in the mouse, at least a proportion of prolactin cells are not derived from growth hormone cells, because the diethylstilbestrol-induced prolactin cells appear earlier than growth hormone gene expression.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
0302-766X
pubmed:author
pubmed:issnType
Print
pubmed:volume
306
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
301-7
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2001
pubmed:articleTitle
Effects of diethylstilbestrol on the cytogenesis of prolactin cells in the pars distalis of the pituitary gland of the mouse.
pubmed:affiliation
Department of Anatomy, School of Medicine, Keio University, 35 Shinanomachi, Shinjuku, Tokyo 160-8582, Japan.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't