Document Detail


Age-dependent changes of pancreatic islet blood flow in the rat.
MedLine Citation:
PMID:  2689526     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Whole pancreatic blood flow (PBF) and islet blood flow (IBF) were measured in anesthetized Sprague-Dawley rats aged 5, 20, 52, or 104 wk. PBF decreased progressively with age, from approximately 0.55 mL x min-1 x g pancreas-1 in 5- and 20-wk-old rats to 0.30 mL x min-x g pancreas-1 in 52- and 104-wk-old rats. In animals aged 5 wk, the IBF was approximately 25 microL x min-1 x g pancreas-1 but increased to about 60 microL x min-1 x g pancreas-1 (p less than 0.001) in animals aged 20-104 wks. When IBF was expressed as a fraction of PBF, a different pattern was observed. In the 5-wk-old animals only 5% (p less than 0.001) of the PBF flowed through the islets, whereas the rats aged 20 wk had a fractional IBF of about 10%. A significantly larger fraction, of approximately 20%, was diverted through the islets in the 52- and 104-wk-old rats. Glucose administration to animals aged 5, 20, and 52 wk significantly increased both PBF and IBF, but had a more marked effect in the older animals. The fractional IBF was also increased by glucose in the two latter groups, indicating a preferential increase in IBF. In the animals aged 5 wk, however, PBF and IBF increased in concert. We conclude that the previously described age-dependent changes in islet volume and functional capacity of the islet organ is also accompanied by changes in the IBF.
Authors:
L Jansson; I Swenne
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  International journal of pancreatology : official journal of the International Association of Pancreatology     Volume:  5     ISSN:  0169-4197     ISO Abbreviation:  Int. J. Pancreatol.     Publication Date:  1989 Sep 
Date Detail:
Created Date:  1990-01-29     Completed Date:  1990-01-29     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8703511     Medline TA:  Int J Pancreatol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  157-63     Citation Subset:  IM    
Affiliation:
Department of Medical Cell Biology, Biomedical Center, Uppsala, Sweden.
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MeSH Terms
Descriptor/Qualifier:
Aging
Animals
Blood Glucose / analysis
Blood Pressure
Cardiac Output
Glucose / pharmacology
Insulin / blood
Islets of Langerhans / blood supply*,  growth & development
Male
Pancreas / blood supply*,  growth & development
Rats
Rats, Inbred Strains
Reference Values
Regional Blood Flow / drug effects
Chemical
Reg. No./Substance:
0/Blood Glucose; 11061-68-0/Insulin; 50-99-7/Glucose

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


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