Effects of metformin therapy on plasma amino acid pattern in patients with maturity-onset diabetes
Abstract
Plasma amino acid concentrations and metformin levels were measured by high-performance liquid chromatography in a group of diabetic patients on therapy with the biguanide drug. Diabetic patients treated with metformin showed higher concentrations of plasma glutamate, asparagine, alanine, methionine and tryptophan, and lower levels of ornithine in comparison with normal subjects, and higher levels of alanine when compared to diet-treated diabetic patients. No correlation emerged between amino acid concentrations and metformin dose or plasma concentration. It is concluded that besides the various metabolic abnormalities that are known to occur during metformin treatment, patients on therapy with metformin also show multiple changes of plasma amino acid pattern.
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