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.
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 diabeticpatients 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.
Authors: F P O'Harte; A C Boyd; A M McKillop; Y H Abdel-Wahab; H McNulty; C R Barnett; J M Conlon; P Højrup; P R Flatt Journal: Peptides Date: 2000-10 Impact factor: 3.750
Authors: Steven J Hunter; Alison C Boyd; Finbarr P M O'Harte; Aine M McKillop; M Ivan Wiggam; Mark H Mooney; Jane T McCluskey; John R Lindsay; Cieran N Ennis; Raymond Gamble; Brian Sheridan; Christopher R Barnett; Helene McNulty; Patrick M Bell; Peter R Flatt Journal: Diabetes Date: 2003-02 Impact factor: 9.461