Skin autofluorescence is associated with past glycaemic control and complications in type 1 diabetes mellitus

As skin autofluorescence (AF) can assess subcutaneous accumulation of fluorescent advanced glycation end-products (AGEs), this study aimed to investigate whether it was linked to glycaemic control and complications in patients with type 1 diabetes mellitus (T1DM). Using the AGE Reader (TM), AF was measured in T1DM patients referred to Haut-Leveque Hospital (Bordeaux, France); data on their HbA(1c) levels measured every 6 months as far back as the last 5 years were also collected. The association of AF with the patients' past glucose control, based on their latest HbA(1c) values, and the means of the last five and 10 HbA(1c), values, and with diabetic complications was also examined by linear regression analysis. The sample included 300 patients: 58% were male; the mean age was 49 (SD 17) years and the mean diabetes duration was 21 (SD 13) years. The median skin AF measurement was 2.0 [25th-75th percentiles: 1.7-2.4] arbitrary units (AU), and this was associated with age (beta = 0.15 per 10 years, P < 0.001) and diabetes duration (beta = 0.17 per 10 years, P < 0.001). After adjusting for age and estimated glomerular filtration rate (eGFR), the skin AF measurement was also related to the means of the last five and 10 HbA(1c) values (beta = 0.10 per 1% of HbA(1c), P = 0.005, and beta = 0.13 per 1% of HbA(1c), P = 0.001, respectively). In addition, the skin AF was associated with retinopathy (P < 0.001), albuminuria (P < 0.001) and decreased eGFR (P < 0.001). In conclusion, the skin AF is related to the long-term glucose control and diabetic complications. (C) 2013 Elsevier Masson SAS. All rights reserved.