Linked Life Data

9370199

Source:http://linkedlifedata.com/resource/pubmed/id/9370199

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
1997-12-23
pubmed:abstractText
Brain aromatase plays an important role in the regulation of adult reproductive behavior in male rodents. This report focuses on recent experiments from our laboratory that examined the distribution and regulation of aromatase mRNA in the rat brain. Aromatase mRNA was measured by a highly sensitive ribonuclease protection assay using a 32P-labeled antisense RNA probe that was complimentary to the 5' coding region of rat aromatase mRNA. This probe protects two RNA fragments in rat brain tissue: a 430-nt length fragment and a shorter 300-nt fragment. The presence of the 300-nt RNA fragment is not associated with enzyme activity in the rat brain and appears to represent an alternative brain-specific aromatase transcript whose function, if any, is unknown. In contrast, the 430-nt RNA fragment represents mRNA, which is thought to encode functional aromatase enzyme because its levels are correlated with aromatase activity concentrations in preoptic area, hypothalamus, amygdala, and ovary. Aromatase activity and mRNA levels in the preoptic area and hypothalamus decreased by 7 days after castration and were maintained at intact levels by treatment with testosterone and dihyhdrotestosterone, but not with estradiol. In contrast, neither aromatase activity nor mRNA levels in the amygdala are affected by castration or hormone replacement. In addition, sex differences in the regulation of aromatase mRNA were apparent in both the preoptic area and hypothalamus. These results demonstrate that androgens regulate the transcription or stability of aromatase mRNA in specific brain areas. Moreover, they suggest that gender differences in androgen responsiveness play an important role in regulating gene expression in the adult rat brain.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
0361-9230
pubmed:author
pubmed:issnType
Print
pubmed:volume
44
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
351-7
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1997
pubmed:articleTitle
Regulation of aromatase gene expression in the adult rat brain.
pubmed:affiliation
Department of Physiology and Pharmacology, Oregon Health Sciences University, Portland 97201, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, U.S. Gov't, Non-P.H.S.