Document Detail


Destruction of noradrenergic innervation to the paraventricular nucleus: deficits in food intake, macronutrient selection, and compensatory eating after food deprivation.
MedLine Citation:
PMID:  3094038     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Norepinephrine (NE) injected into the paraventricular nucleus (PVN) has a stimulatory effect on feeding behavior and is found to selectively enhance preference for carbohydrate in the rat. The present experiments were conducted to assess the impact of chronic depletion of NE within the PVN on food intake and appetite regulation. The catecholamine (CA) neurotoxin, 6-hydroxydopamine (6-OHDA), when administered into the PVN, produced a significant depletion of PVN NE in association with a variety of behavioral changes. The immediate consequence of the neurotoxin lesion was a dramatic increase in 24-hr food intake, attributed predominantly to a preferential increase in carbohydrate and fat consumption. The long-term effects related to CA depletion were a deficit in daily food consumption, particularly of carbohydrate (-42%). Although animals with diminished PVN NE maintained a normal diurnal feeding pattern, they failed to exhibit the increased ingestion of an energy-rich carbohydrate diet which rats normally show during the dark period of the diurnal cycle. Rats injected with 6-OHDA directly into the PVN exhibited a normal response to glucoprivic challenge, but demonstrated a deficit in their ability to produce compensatory feeding, particularly of carbohydrate and fat, in response to food deprivation. These findings suggest a specific function for PVN noradrenergic mechanisms in normal energy repletion when body energy stores are reduced.
Authors:
G Shor-Posner; A P Azar; M Jhanwar-Uniyal; R Filart; S F Leibowitz
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Pharmacology, biochemistry, and behavior     Volume:  25     ISSN:  0091-3057     ISO Abbreviation:  Pharmacol. Biochem. Behav.     Publication Date:  1986 Aug 
Date Detail:
Created Date:  1986-11-21     Completed Date:  1986-11-21     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  0367050     Medline TA:  Pharmacol Biochem Behav     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  381-92     Citation Subset:  IM; S    
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MeSH Terms
Descriptor/Qualifier:
Adaptation, Physiological
Animals
Circadian Rhythm
Eating
Feeding Behavior / physiology*
Food Deprivation / physiology
Food Preferences
Hydroxydopamines / pharmacology
Male
Norepinephrine / physiology*
Oxidopamine
Paraventricular Hypothalamic Nucleus / physiology*
Rats
Rats, Inbred Strains
Chemical
Reg. No./Substance:
0/Hydroxydopamines; 1199-18-4/Oxidopamine; 51-41-2/Norepinephrine

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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