Effects of Glucosamine on Insulin and Glucagon Secretion in Dogs and Ducks

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概要

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• The effects of infusion of glucosamine on immunoreactive glucagon (IRG) and insulin (IRI) secretion were studied in dogs and ducks. During systemic infusion of glucosamine, hyperglycemia developed and insulin secretion was inhibited in both species. An immediate and sustained elevation of peripheral IRG levels was induced in ducks but a transient rise, detectable only in the pancreatic vein blood, was provoked in dogs. Suppression of insulin release and stimulation of glucagon release may be mediated by the inhibition of glucose utilization in β-and α-cells. The very prompt response of IRG in ducks may imply that glucosamine has a specific stimulating effect on the α-cells of ducks. Intrapancreatic administration of glucosamine in dogs, however, failed to elicit the rise of IRG, although insulin secretion was inhibited. Thus, it is suggested that the systemic administration of glucosamine in dogs may stimulate IRG secretion by some indirect effect.<BR>In one dog, however, a sustained rise of the pancreatic vein IRG was observed. Thus, the possibility cannot be ruled out that the difference in IRG response to glucosamine in dogs and ducks is quantitative rather than qualitative. Glucagon release by glucosamine may provide an additional factor to the hyperglycemic effect of glucosamine, in addition to its effect to suppress insulin release as well as its direct inhibitory effect on glucose utilization in tissues.

• 社団法人 日本内分泌学会の論文

著者

• KUZUYA TAKESHI

  The Third Department of Internal Medicine, Faculty of Medicine, University of Tokyo

• KAJINUMA HIROSHI

  The Third Department of Internal Medicine, Faculty of Medicine, University of Tokyo

• IDE TAKEHIKO

  The Third Department of Internal Medicine, Faculty of Medicine, University of Tokyo

• TYLER JEAN

  Division of Endocrinology and Metabolic Diseases, Department of Medicine, Medical College of Georgia

関連論文

• Effects of Glucosamine on Insulin and Glucagon Secretion in Dogs and Ducks
• Human plasma C-peptide immunoreactivity: Its correlation with immunoreactive insulin in diabetes, and chronic liver and renal diseases.

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