Abstract
To examine the effect of the somatostatin analog, octreotide, on insulin-mediated glucose uptake, seven insulin-dependent diabetic (IDDM) subjects were studied with and without 4 days of continuous subcutaneous octreotide administration (1 mg/kg/d). Insulin dosage was adjusted after frequent measurements of plasma glucose level. On the third day a hormonal and metabolic blood profile was obtained, and on the fourth day a euglycemic (5 mmol/L), hyperinsulinemic (1 mU/kg/min) clamp was performed in combination with calorimetry and a muscle biopsy. Mean plasma glucose levels on day 3 were similar (7.9 +/- 0.9 v 9.0 +/- 0.6 mmol/L). Growth hormone (GH) (0.39 +/- 0.10 v 0.78 +/- 0.23 mg/L, P < .05), insulin-like growth factor-1 (IGF-1) (127 +/- 17 v 157 +/- 21 mg/L, P < .05), and nonesterified fatty acids (NEFA) (239 +/- 25 v 405 +/- 44 mmol/L, P < .01) were lower following octreotide administration. Insulin requirements were reduced during octreotide administration, resulting in significantly lower insulin levels (27.3 +/- 2.7 v 39.9 +/- 9.9 mU/L, P < .5). During the clamp, glucose and insulin levels wer similar. Following octreotide, glucose disposal (7.33 +/- 0.49 v 6.08 +/- 0.55 mg/kg/min, P < .05) increased and hepatic glucose ...Continue Reading
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