Abstract
The study has examined the effect of streptozotocin-induced diabetes of 3 days and 10 weeks duration upon the serotonin content of the rat pancreas and small intestine. Streptozotocin administration (65 mg/kg) resulted in a significant (p less than 0.001) decrease in pancreatic serotonin after 3 days (to 18% of the non-diabetic content). Diabetes of both short- and medium-term duration had no significant effect upon the serotonin content of the small intestine suggesting that changes in mucosal serotonin levels are not responsible for the diarrhea frequently observed in streptozotocin-treated animals. The diabetogenic effect of streptozotocin and the reduction in pancreatic serotonin were abolished by prior injection of nicotinamide thus providing further evidence for co-storage of insulin and serotonin in the B cell.
Published Version
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