Document Detail


Hyperinsulinaemia and insulin resistance of cirrhosis: the importance of insulin hypersecretion.
MedLine Citation:
PMID:  6391746     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The mechanism for the hyperinsulinaemia in cirrhosis was investigated using two different approaches. In the first study, the metabolic clearance rate of insulin was measured at steady state in 13 cirrhotic and 13 weight-matched control subjects. With comparable insulin infusion rates (1.00 +/- 0.19 versus 1.07 +/- 0.15 mU/kg/min), steady-state plasma insulin concentrations (104 +/- 25 versus 87 +/- 12 microU/ml; P greater than 0.5) and MCRIRI (13.6 +/- 1.6 versus 15.4 +/- 2.0 ml/kg/min; P greater than 0.5) were similar. In the second study, fasting and oral glucose stimulated C-peptide/insulin ratios were compared in 16 cirrhotic and 18 weight matched control subjects. Although fasting glucose levels were significantly higher in the cirrhotic groups, all values were in the normal range (5.5 +/- 0.3 versus 4.8 +/- 0.1 mmol/l, P less than 0.02). However, fasting insulin (0.171 +/- 0.02 versus 0.068 +/- 0.004 nmol/l) and C-peptide (1.02 +/- 0.13 versus 0.42 +/- 0.02 nmol/l) were strikingly higher (P less than 0.001) in cirrhotic subjects. On the other hand, fasting C-peptide/insulin ratios were not statistically different in the two groups (6.18 +/- 0.52 versus 6.77 +/- 0.46; P greater than 0.3). This suggests that beta cell hypersecretion was the principal cause of the fasting hyperinsulinaemia, rather than decreased insulin hepatic extraction. Following the glucose load in 13 of the control and seven of the cirrhotic group, the C-peptide/insulin ratio fell in both groups but was significantly lower in the cirrhotic compared to control subjects at 30, 60 and 120 min, consistent with possible impairment of hepatic insulin extraction.(ABSTRACT TRUNCATED AT 250 WORDS)
Authors:
J Proietto; F J Dudley; P Aitken; F P Alford
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Clinical endocrinology     Volume:  21     ISSN:  0300-0664     ISO Abbreviation:  Clin. Endocrinol. (Oxf)     Publication Date:  1984 Dec 
Date Detail:
Created Date:  1985-02-11     Completed Date:  1985-02-11     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0346653     Medline TA:  Clin Endocrinol (Oxf)     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  657-65     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Adult
Blood Glucose / metabolism
C-Peptide / blood
Fasting
Female
Glucose Tolerance Test
Humans
Insulin / blood*,  secretion
Insulin Resistance*
Islets of Langerhans / secretion
Liver Cirrhosis / blood*,  physiopathology
Male
Metabolic Clearance Rate
Middle Aged
Chemical
Reg. No./Substance:
0/Blood Glucose; 0/C-Peptide; 11061-68-0/Insulin

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


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