Journal article
Corticotropin-releasing hormone in the lateral parabrachial nucleus inhibits sodium appetite in rats
American journal of physiology. Regulatory, integrative and comparative physiology, Vol.290(4), pp.R1136-1141
04/2006
DOI: 10.1152/ajpregu.00075.2003
PMID: 16357101
Abstract
The present study investigated the role of corticotropin-releasing hormone (CRH) in the lateral parabrachial nucleus (LPBN) in the behavioral control of body fluid homeostasis by determining the effect of bilateral injections of the CRH receptor antagonist, alpha-helical corticotropin-releasing factor (CRF)(9-41), and the CRH receptor agonist, CRH, on sodium chloride (salt appetite) and water (thirst) intake. Groups of adult, male Sprague-Dawley rats had stainless-steel cannulas implanted bilaterally into the LPBN and were sodium depleted or water deprived. Bilateral injections of alpha-helical CRF(9-41) into the LPBN significantly potentiated water and salt intake in the sodium-depleted rats when access to fluids was restored. Bilateral injections of alpha-helical CRF(9-41) into the LPBN (1.0 microg) also increased sodium appetite in water-deprived rats. Conversely, in sodium-depleted animals, bilateral injections of CRH inhibited sodium chloride intake. These results suggest that there is an endogenous CRH inhibitory mechanism operating in the LPBN to modulate the intake of sodium (salt appetite). This mechanism may contribute to the behavioral control of restoration of body fluid homeostasis in sodium-deficient states.
Details
- Title: Subtitle
- Corticotropin-releasing hormone in the lateral parabrachial nucleus inhibits sodium appetite in rats
- Creators
- Emilio De Castro e Silva - Department of Physiology, Health Sciences Institute, Federal University of Bahia, Bahia, BrazilJosmara B FregonezeAlan Kim Johnson
- Resource Type
- Journal article
- Publication Details
- American journal of physiology. Regulatory, integrative and comparative physiology, Vol.290(4), pp.R1136-1141
- DOI
- 10.1152/ajpregu.00075.2003
- PMID
- 16357101
- ISSN
- 0363-6119
- eISSN
- 1522-1490
- Grant note
- HL-14388 / NHLBI NIH HHS DK-066086 / NIDDK NIH HHS HL-57472 / NHLBI NIH HHS
- Language
- English
- Date published
- 04/2006
- Academic Unit
- Psychological and Brain Sciences; Neuroscience and Pharmacology; Health and Human Physiology
- Record Identifier
- 9984213412402771
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