Abstract:
:Serum insulin response to a single bolus of IV glucose or tolbutamide was measured in eight healthy subjects. Insulin disappearance rate was assessed by deconvolution from the serum insulin levels, using the measured insulin disappearance rate. The mean rate constant of insulin disappearance was 0.238 +/- 0.005 min-1 (mean +/- SEM). Basal insulin delivery rate was 8.0 to 9.0 mU/min and the delivery rate following glucose injection (0.5 g/kg body weight) showed a biphasic response, whereas that after tolbutamide injection (15.6 mg/kg body weight), a monophasic response. After glucose injection, 1.7 +/- 0.3 U of insulin was delivered during the first phase (0--10 min) and 5.6 +/- 1.6 U during the second phase (11--60 min). After tolbutamide injection, 1.5 +/- 0.3 U of insulin was delivered during the first 10 min. Between 11 and 40 min, 1.6 +/- 0.5 U of insulin was delivered. The results thus confirm and also quantitate biphasic insulin secretion after a bolus of glucose with a monophasic response after tolbutamide. The method is suitable for studies of the insulin secretogogues in man.
journal_name
Diabetologiajournal_title
Diabetologiaauthors
Asano T,Sasaki H,Okumura Mdoi
10.1007/BF00421232subject
Has Abstractpub_date
1978-09-01 00:00:00pages
159-64issue
3eissn
0012-186Xissn
1432-0428journal_volume
15pub_type
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