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Serum fructosamine concentrations in dogs with hypothyroidism
C E Reusch1, B Gerber, F S Boretti
1Clinic for Small Animal Internal Medicine, University of Zurich, Switzerland.
Veterinary Research Communications
|November 6, 2002
Summary
Serum fructosamine levels are often elevated in hypothyroid dogs due to slowed protein turnover, not high blood glucose. Treatment with levothyroxine effectively lowers these fructosamine levels.
Area of Science:
- Veterinary Medicine
- Endocrinology
- Clinical Pathology
Background:
- Hypothyroidism is a common endocrine disorder in dogs.
- Serum fructosamine is a marker of long-term glycemic control, influenced by protein metabolism.
- The relationship between fructosamine and hypothyroidism in dogs requires further elucidation.
Purpose of the Study:
- To investigate serum fructosamine concentrations in untreated hypothyroid dogs.
- To assess the effect of levothyroxine treatment on serum fructosamine levels.
- To determine if elevated fructosamine in hypothyroidism is linked to blood glucose or protein turnover.
Main Methods:
- Serum fructosamine was measured in 11 untreated hypothyroid dogs.
- Dogs had normal serum glucose and protein concentrations.
- Fructosamine levels were re-evaluated during levothyroxine treatment.
Main Results:
- Elevated serum fructosamine levels (median 376 micromol/L) were observed in 9 out of 11 hypothyroid dogs.
- Fructosamine levels were significantly reduced following levothyroxine administration.
- No significant alterations in serum glucose or protein were noted in the study population.
Conclusions:
- Elevated serum fructosamine concentrations in hypothyroid dogs may be attributed to decelerated protein turnover.
- This elevation appears independent of concurrent blood glucose concentrations.
- Serum fructosamine can be a useful indicator in managing canine hypothyroidism.