title: Microarray analysis of gene expression in the supraoptic nucleus of normoosmotic and hypoosmotic rats.
abstract: 1. Hypoosmolality produces a dramatic inhibition of vasopressin (VP) and oxytocin (OT) gene expression in the supraoptic nucleus (SON). This study examines the effect of sustained hypoosmolality on global gene expression in the OT and VP magnocellular neurons (MCNs) of the hypothalamo-neurohypophysial system (HNS), in order to detect novel genes in this system that might be involved in osmoregulation in the MCNs. 2. For this purpose, we used Affymetrix oligonucleotide arrays to analyze the expression of specific genes in laser microdissected rat SONs, and their changes in expression during chronic hypoosmolality. We identified over 40 genes that had three-fold or more greater expression in the SON versus total hypothalamus, and that also changed more than two fold in expression as a result of the chronic hypoosmolar treatment. These genes contained both novel as well as genes previously known to be present in the SON. All of the raw data for the genes that are expressed in the SON and altered by hypoosmolality can be found on the following NINDS website URL address: http://data.ninds.nih.gov/Gainer/Publications.
authors.affiliation: Laboratory of Neurochemistry, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892, USA.
authors.forename: Chunmei
authors.initials: C
authors.lastname: Yue
authors.forename: Noriko
authors.initials: N
authors.lastname: Mutsuga
authors.forename: Joseph
authors.initials: J
authors.lastname: Verbalis
authors.forename: Harold
authors.initials: H
authors.lastname: Gainer
mesh_terms: D000818:Animals; D008297:Male; D020411:Oligonucleotide Array Sequence Analysis; D051381:Rats; D017207:Rats, Sprague-Dawley; D013495:Supraoptic Nucleus / Q000187:drug effects / Q000378:metabolism*; D014157:Transcription Factors / Q000378:metabolism; D014667:Vasopressins / Q000008:administration & dosage; D014882:Water-Electrolyte Balance / Q000187:drug effects; D014883:Water-Electrolyte Imbalance
chemical_list: D014157:Transcription Factors; D014667:Vasopressins