Exenatide once-weekly improves metabolic parameters, endothelial dysfunction and carotid intima-media thickness in patients with type-2 diabetes: An 8-month prospective study.

ABSTRACT

AIM: To evaluate the effect of exenatide long acting release (LAR) on carotid intima-media thickness (IMT) and endothelial function in patients with type 2 diabetes mellitus. METHODS: Sixty subjects with type 2 diabetes mellitus were treated with exenatide LAR as add-on to stable doses of metformin for 8 months in an open label study. Anthropometric variables, lipid profile and glycemic parameters were assessed by routine analysis. Carotid IMT by Doppler ultrasound and endothelial function by flow-mediated dilation of the brachial artery were also assessed. RESULTS: Exenatide significantly improved fasting glycaemia (from 8.8 ±â€¯2.8 to 7.3 ±â€¯2.2 mmol/L, p < 0.0001), HbA1c (from 8.0 ±â€¯0.4 to 6.9 ±â€¯1.1%, p < 0.0001), body mass index (from 33 ±â€¯9 to 31 ±â€¯6 kg/m2, p = 0.0348) and waist circumference (from 109 ±â€¯13 to 106 ±â€¯13 cm, p = 0.0105). There was a significant improvement of the lipid profile, except in triglyceride level where no changes were observed. Carotid IMT and flow-mediated dilation were also improved (from 0.98 ±â€¯0.14 to 0.87 ±â€¯0.15 mm and from 5.8 ±â€¯1.3 to 6.8 ±â€¯1.7%, respectively; p < 0.0001 for both). CONCLUSIONS: Treatment with exenatide LAR led to improved cardio-metabolic parameters, including carotid IMT and flow-mediated dilation, independently of glucometabolic control. These results may help to explain, at least in part, the cardiovascular safety of exenatide LAR, as recently reported in cardiovascular outcome trials.