Linked Life Data

10940480

Source:http://linkedlifedata.com/resource/pubmed/id/10940480

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1-2
pubmed:dateCreated
2000-11-7
pubmed:abstractText
Cell-cell interactions are crucial role for the proper functioning of endocrine glands. We recently demonstrated that interactions of chromaffin and cortical cells are important for adrenocortical steroidogenesis. However, the molecular mechanisms have not been elucidated and it is unclear if this involves acute and/or chronic processes. By Northern analysis and the quantitative technique of TaqMan PCR we investigated whether chromaffin cells influence the regulation of StAR and the peripheral benzodiazepine receptor (PBR), both required for the rate-limiting step, the delivery of cholesterol to the inner mitochondrial membrane. StAR mRNA levels in bovine adrenocortical cells were increased by incubation with chromaffin cell-conditioned medium (CCM). Short-term treatment for 4 h resulted in a greater stimulation (229+/-29% of basal, mean+/-SEM) than did longer incubation times of 8 h and 5 days (159+/-13 and 177+/-24%). Neither short nor a long-term treatment affected PBR expression. Consistently, the major secretion of chromaffin cells, epinephrine dose-dependently stimulated StAR expression with no effect on PBR mRNA. In conclusion, adrenomedullary secretory products are not necessary for the maintenance of PBR expression but facilitate steroid biosynthesis by increasing StAR mRNA expression and therefore can account for an ACTH-independent regulation of the rate-limiting step in steroidogenesis.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
0303-7207
pubmed:author
pubmed:issnType
Print
pubmed:day
25
pubmed:volume
165
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
25-32
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
2000
pubmed:articleTitle
Expression of adrenocortical steroidogenic acute regulatory (StAR) protein is influenced by chromaffin cells.
pubmed:affiliation
Department of Internal Medicine III, University of Leipzig, 04103, Leipzig, Austria.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't