Linked Life Data

15176476

Source:http://linkedlifedata.com/resource/pubmed/id/15176476

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
2004-6-4
pubmed:abstractText
The gonadal steroid estrogen is a pleiotropic hormone that has multiple effects on numerous cellular functions. One of estrogen's major targets is the brain, where the steroid not only affects growth, differentiation, and survival of neurons, but also regulates cell excitability. Because estrogen modulates multiple, overlapping signaling pathways, it has been difficult to scrutinize the transcriptional activity of the steroid. Therefore, we still lack a global picture of how different genes interact and are regulated by estrogen. Herein we report the use of suppression subtractive hybridization followed by custom microarray analysis of thousands of genes that are differentially expressed during the negative feedback phase of the female reproductive cycle. We have found a number of key transcripts that are regulated by estrogen and contribute to the alteration in synaptic transmission and hence excitability of hypothalamic neurons (e.g., GABA neurons). These include gec-1, GABA(B)R2, PI3 kinase subunit p55gamma, and a number of proteins containing pleckstrin homology domains that are critical for plasma membrane targeting. Studies are underway to refine our analysis to individual nuclei and individual cells. However, what has emerged from this highly sensitive microarray analysis is that estrogen affects neuronal plasticity in hypothalamic neurons not only by transcription of new membrane proteins (e.g., receptors and channels), but also by altering expression of downstream signaling molecules and proteins involved in neurosecretory pathways.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
0364-3190
pubmed:author
pubmed:issnType
Print
pubmed:volume
29
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1189-200
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
2004
pubmed:articleTitle
Suppression subtractive hybridization and microarray identification of estrogen-regulated hypothalamic genes.
pubmed:affiliation
Department of Physiology and Pharmacology, Oregon Health and Science University, Portland, Oregon 97239, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't