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The use of diazoxide in patients with insulinoma has been evaluated using the euglycaemic clamp technique. There was significantly reduced mean tissue sensitivity to insulin, expressed as the ratio of glucose disposal rate to serum insulin concentration (M/I), in untreated patients compared to the control group. The metabolic clearance rate of insulin (MCRI) was reduced in the patients before treatment in comparison with the controls. The administration of diazoxide (Proglicem1) for three days (3 mg.kg-1 per day) caused a fall in serum insulin concentrations, together with an increase in the metabolic clearance rate of insulin and increased tissue sensitivity to insulin.

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We have evaluated the relationship between diabetes meUitus and exocrine pancreatic insufficiency in diabetic subjects by measuring a specific isoamylase arising from the pancreas. The pancreatic-and salivary-type isoamylase activity in serum and urine were evaluated and related to duration of disease, sex, age, weight, blood glucose level and glycosuria in 153 diabetics. In the insulin-dependent diabetics diagnosed between 15 and 24 years of age, a significant decrease in pancreatic isoamylase activity was found in serum and urine