Document Detail


The effect of postischemic blood glucose levels on ischemic brain damage in the rat.
MedLine Citation:
PMID:  3059989     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The effect of insulin-induced hypoglycemia following 10.5 minutes of forebrain ischemia was studied in the rat. All groups received preischemic glucose loading (2 gm/kg) to promote brain infarction. Following completion of ischemia, rats received either 2 to 3 IU/kg (low-dose group) or 8 to 20 IU/kg (high-dose group) insulin. During the survival period, blood glucose concentrations were maintained in the ranges of 1.2 to 2.9 mM and 2.9 to 4.9 mM, respectively, for the low-dose and high-dose insulin groups. Control rats were given 2 gm/kg glucose immediately following ischemia. During the recovery period, until perfusion at 7 days, they were given glucose, 2 gm/kg, twice daily by intraperitoneal injection, and their drinking water was supplemented with 25% glucose. Mortality (p less than 0.05) and postischemic seizure incidence (p less than 0.01) were significantly reduced in the low-dose insulin group compared to the control group. Mortality was increased in the high-dose insulin group compared to the control group and was associated with an increased incidence of postischemic seizures. Neuropathological examination revealed no cortical infarction in the low-dose or high-dose insulin-treated rats compared to a 60% incidence of cortical infarction in the control group. In addition, the high-dose insulin-treated group showed a significant reduction in striatal and hippocampal CA1 selective neuronal necrosis compared to control rats with comparable survivals (p less than 0.05). The findings suggest that postischemic blood glucose concentrations play an important role in modulating both ischemic infarction and selective neuronal necrosis.
Authors:
C L Voll; R N Auer
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Annals of neurology     Volume:  24     ISSN:  0364-5134     ISO Abbreviation:  Ann. Neurol.     Publication Date:  1988 Nov 
Date Detail:
Created Date:  1989-01-24     Completed Date:  1989-01-24     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7707449     Medline TA:  Ann Neurol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  638-46     Citation Subset:  IM    
Affiliation:
Department of Pathology, University of Calgary, Alberta, Canada.
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MeSH Terms
Descriptor/Qualifier:
Animals
Blood Glucose / physiology*
Brain Ischemia / blood*,  mortality,  pathology
Cerebral Infarction / blood,  mortality,  pathology
Drug Administration Schedule
Glucose Tolerance Test
Insulin / administration & dosage
Male
Necrosis
Rats
Rats, Inbred Strains
Chemical
Reg. No./Substance:
0/Blood Glucose; 11061-68-0/Insulin

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


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