Citations

Insulin binding by insulin antibodies was determined serially in eight menstruating and in twelve pregnant diabetic subjects. No significant variation was noted in the insulin binding values before, during or after menstruation or during or after pregnancy. This constancy of insulin binding was observed despite major and minor changes in insulin needs. No causal relationship could be demonstrated between insulin binding by insulin antibodies and changing insulin requirements. If there is a relationship between the hormonal changes and the alterations in insulin needs during menstruation and pregnancy, the mechanism of this relationship is not mediated through the insulin binding capacity of circulating insulin antibodies.

Exercise studies were performed on six intact and seven pancreatectomized, unanesthetized dogs to examine the conditions under which exercise decreases the concentration of glucose in blood. No major change in blood glucose concentration was demonstrated during exercise experiments on normoglycemic intact dogs. In the pancreatectomized dogs, the blood glucose concentration curves during exercise followed either one of two patterns: Some rose with exercise and some fell. In dogs with baseline blood glucose concentrations less than 400 mg. per 100 ml., a sustained decline in blood glucose occurred with exercise, while in those dogs with an initial level greater than 400, a rise occurred. No effect of exercise was evident in a pancreatectomized dog with blood glucose concentration near the normal range during continuous infusion of insulin. Exercise produced a decrease in blood glucose concentration in an intact dog with hyperglycemia induced by glucose infusion, but this dog's blood glucose level increased during rest periods following exercise.

Disturbances of gastrointestinal function have frequently been observed in association with diabetes mellitus. The disorders which have been reported include gastric atony and dilatation, postprandial abdominal cramping, severe constipation, and intractable diarrhea characterized by watery stools, nocturnal exacerbations and fecal incontinence. These disturbances have been attributed by many investigators to alterations in gastrointestinal motility secondary to visceral diabetic neuropathy. The purpose of the present report is to call attention to a group of patients with diabetes mellitus and neuropathy who exhibited diarrhea and steatorrhea which apparently could not be attributed to external pancreatic insufficiency.