La paraoxonase 1 : un marqueur de risque cardiovasculaire chez les jeunes diabétiques de type 1 ? (109 cas)

OBJECTIVES We purpose to verify if paraoxonase 1 (PON1) activity may be a marker of cardiovascular risk in a young Tunisian population with type 1 diabetes (T1D). METHODS PON1 activity was measured by a kinetic method using paraoxon as substrate. The other parameters were determined by automated methods. RESULTS One hundred and nine children and adolescents with T1D and 97 healthy subjects were involved in this study. PON1 activity and PON1/HDL-cholesterol ratio were significantly decreased in diabetics (303 ± 174 vs. 372 ± 180 U/L and 221 ± 139 vs. 298 ± 20 1U/mmol, P=0.006, P=0.002, respectively) compared to controls. A significant increase in total cholesterol, LDL-c and microalbuminuria was observed in diabetics compared to controls. PON1 activity was decreased by 9.5% in patients with diabetes duration ≥ 6 years, by 28.4% for those with fasting glycemia ≥ 7 mmol/L (P