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Demonstration of increased concentrations of circulating glycated insulin in human Type 2 diabetes using a novel and specific radioimmunoassay

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

Lindsay, JR, McKillop, Aine, Mooney, MH, O'Harte, Finbarr, Bell, PM and Flatt, Peter (2003) Demonstration of increased concentrations of circulating glycated insulin in human Type 2 diabetes using a novel and specific radioimmunoassay. DIABETOLOGIA, 46 (4). pp. 475-478. [Journal article]

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DOI: 10.1007/s00125-003-1059-y

Abstract

Aims/hypothesis. Glycation of insulin, resulting in impaired bioactivity, has been shown within pancreatic beta cells. We have used a novel and specific radioimmunoassay to detect glycated insulin in plasma of Type 2 diabetic subjects. Methods. Blood samples were collected from 102 Type 2 diabetic patients in three main categories: those with good glycaemic control with a HbA(1c) less than 7%, moderate glycaemic control (HbA(1c) 7-9%) and poor glycaemic control (HBA(1c) greater than 9%). We used 75 age- and sex-matched non-diabetic subjects as controls. Samples were analysed for HbA(1c), glucose and plasma concentrations of glycated insulin and insulin. Results. Glycated insulin was readily detected in control and Type 2 diabetic subjects. The mean circulating concentration of glycated insulin in control subjects was 12.6 +/- 0.9 pmol/l (n=75). Glycated insulin in the good, moderate and poorly controlled diabetic groups was increased 2.4-fold (p<0.001, n=44), 2.2-fold (p<0.001, n=41) and 1.1-fold (n=17) corresponding to 29.8 +/- 5.4, 27.3 +/- 5.7 and 13.5 +/- 2.9 pmol/l, respectively. Conclusion/interpretation. Glycated insulin circulates at noticeably increased concentrations in Type 2 diabetic subjects.

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:3039
Deposited By:Professor Peter Flatt
Deposited On:14 Jan 2010 15:34
Last Modified:28 Feb 2011 11:16

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