Changes in plasma glucose, insulin (IRI), glucagon (IRG) and free fatty acids (FFA) following alanine loading in hyperthyroid patients.
The responses of plasma glucose, insulin (IRI), glucagon (IRG) and free fatty acids (FFA) following alanine loading (0.1 g/kg) were observed in 9 control subjects and 7 hyperthyroid patients, before and after restoration of thyroid function to normal. Despite the persistence of impaired glucose response to alanine, the blunted IRI and IRG responses in the hyperthyroid state were improved with a significant reduction in fasting IRI and IRG after treatment. Markedly increased FFA following alanine loading in hyperthyroid patients was reduced after treatment, but the FFA concentration remained greater than in the control subjects. We tentatively conclude that the impaired alpha and beta-cell responses to alanine were temporarily induced by the direct and/or indirect effects of thyroid hormone excess.
Ida
H
H
First Department of Internal Medicine, School of Medicine, Fukuoka University, Japan.
Yamamoto
T
T
Ninomiya
H
H
Sasaki
H
H
Asano
T
T
Okumura
M
M
D000328:Adult; D000409:Alanine / Q000097:blood / Q000493:pharmacokinetics / Q000494:pharmacology*; D001786:Blood Glucose / Q000032:analysis*; D005230:Fatty Acids, Nonesterified / Q000097:blood*; D005260:Female; D005934:Glucagon / Q000097:blood*; D006801:Humans; D006980:Hyperthyroidism / Q000097:blood*; D007328:Insulin / Q000097:blood*; D008297:Male; D008875:Middle Aged
D001786:Blood Glucose; D005230:Fatty Acids, Nonesterified; D007328:Insulin; D005934:Glucagon; D000409:Alanine