ISSN:
1432-0428
Keywords:
Artificial B cell
;
dog
;
experimental diabetes
;
alanine metabolism
;
gluconeogenesis
;
tracer study
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Summary The flux rates of plasma glucose and alanine were studied isotopically (6-3H-glucose and U-14C-alanine simultaneously) in resting chronically diabetic dogs during short-term treatment with an artificial B cell where the insulin was infused into a peripheral vein. Despite perfect blood glucose control and normal glucose flux rates, the concentration and rates of appearance and disappearance of alanine were significantly elevated in the diabetic animals before, during and after an exogenous glucose load. The incorporation of the carbon moiety of alanine into circulating glucose was also increased, but diminished to a near-normal extent when exogenous glucose was given. The plasma clearance rates for alanine in the diabetic dogs were normal throughout the study. It is concluded that normal blood glucose control in diabetes does not necessarily mean normalization of the entire metabolic network. On the basis of peripheral hyperinsulinaemia alanine formation from glucose and branched chain amino acids is elevated in muscle. This may explain increased flux of alanine despite normal blood glucose control.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00265025
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