Document Detail


Comparison of the effects of chronic central administration and chronic peripheral administration of islet amyloid polypeptide on food intake and meal pattern in the rat.
MedLine Citation:
PMID:  17614161     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Islet amyloid polypeptide (IAPP) is postulated to act as a hormonal signal from the pancreas to the brain to inhibit food intake and reduce adipose energy reserves. The present study compared the effects of chronic peripheral and chronic central administration of IAPP on food intake and meal pattern in rats. IAPP was administered subcutaneously (SC) for 7 days at doses of 0, 0.25, 2.5 and 25 pmol kg(-1) min(-1) using an osmotic minipump or administered centrally at doses of 0, 0.025, 0.25 and 2.5 pmol kg(-1) min(-1) using an osmotic minipump connected to an intracerebroventricular (ICV) catheter inserted into the third ventricle. Both SC and ICV infusion decreased total food intake dose-dependently. The minimal effective dose was 2.5 pmol IAPP kg(-1) min(-1) for SC administration and 0.25 pmol kg(-1) min(-1) for ICV infusion. The decrease in food intake produced by infusion of IAPP was mainly due to decreased meal size, although a significant decrease in meal number also occurred at the highest SC and ICV doses. SC administration produced a larger, more persistent decrease in food intake during the light period than in the dark period, while ICV infusion caused a larger, more persistent decrease during the dark period. The 10-fold difference in minimal effective doses indicates that ICV-administered IAPP acted primarily in the brain to inhibit food intake. The difference between the effects of IAPP on meal pattern with the two methods of administration suggests that IAPP does not act on the same target(s) when administered centrally as it does when it is administered peripherally.
Authors:
Madelene Olsson; Margery K Herrington; Roger D Reidelberger; Johan Permert; Urban Arnelo
Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2007-06-19
Journal Detail:
Title:  Peptides     Volume:  28     ISSN:  0196-9781     ISO Abbreviation:  Peptides     Publication Date:  2007 Jul 
Date Detail:
Created Date:  2007-07-30     Completed Date:  2007-11-28     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8008690     Medline TA:  Peptides     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1416-23     Citation Subset:  IM    
Affiliation:
Department for Clinical Science, Intervention and Technology (CLINTEC), Division of Surgery, K53, Karolinska Institutet at Karolinska University Hospital, Huddinge, SE-141 86 Stockholm, Sweden.
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MeSH Terms
Descriptor/Qualifier:
Amyloid / administration & dosage*,  pharmacology
Animals
Body Weight / drug effects
Dose-Response Relationship, Drug
Eating / drug effects*
Infusions, Intravenous
Male
Rats
Rats, Sprague-Dawley
Satiety Response
Time Factors
Grant Support
ID/Acronym/Agency:
DK55830/DK/NIDDK NIH HHS
Chemical
Reg. No./Substance:
0/Amyloid; 106602-62-4/amylin

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


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