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Secretion of glycated insulin from pancreatic beta-cells in diabetes represents a novel aspect of beta-cell dysfunction and glucose toxicity

Biomedical Sciences Research Institute Computer Science Research Institute Environmental Sciences Research Institute Nanotechnology & Advanced Materials Research Institute

McKillop, Aine, Abdel-Wahab, Yasser, Mooney, MH, O'Harte, Finbarr and Flatt, Peter (2002) Secretion of glycated insulin from pancreatic beta-cells in diabetes represents a novel aspect of beta-cell dysfunction and glucose toxicity. DIABETES AND METABOLISM, 28 (6, Part 2). S61-S69. [Journal article]

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Abstract

Hyperglycaemia, a significant pathophysiological state in diabetes mellitus, may contribute to defective pancreatic beta-cell function, secretion and action of insulin through glycation of important regulatory proteins. This paper highlights recent data supporting the concept that pancreatic beta-cell dysfunction is associated with increased glycation of functional proteins. The pancreatic beta-cell provides a highly favourable environment for the intracellular glycation of insulin which is a relatively rapid, glucose-dependent process. Using a novel radioimmunoassay and immunocytochemical techniques, glycated insulin has been shown to be stored and secreted from pancreatic beta-cells in both human and animal models of diabetes. Glycated insulin represents a significant proportion of total circulating insulin in type 2 diabetes and may have impaired metabolic clearance compared with native insulin. Since glycation of insulin disturbs normal cellular function and results in decreased biological activity, it may play a significant contributory role in the insulin resistance and glucose intolerance of type 2 diabetes. Further studies are necessary to evaluate the possible significance of glycated insulin in both the pathophysiology of diabetes and future therapeutic approaches.

Item Type:Journal article
Faculties and Schools:Faculty of Life and Health Sciences
Faculty of Life and Health Sciences > School of Biomedical Sciences
Research Institutes and Groups:Biomedical Sciences Research Institute
Biomedical Sciences Research Institute > Diabetes
ID Code:3047
Deposited By:Professor Peter Flatt
Deposited On:14 Jan 2010 15:21
Last Modified:28 Feb 2011 11:17

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