Type 2 Diabetes Clinical Trial
Official title:
Nitrate Supplementation and Exercise Tolerance in Patients With Type 2 Diabetes
The purpose of this study is to use a randomized, double-blind, placebo controlled study design to comprehensively investigate the impact of 8-weeks of dietary nitrate supplementation on skeletal muscle blood flow, mitochondrial function, and exercise capacity in patients with type 2 diabetes (T2D).
Patients with type 2 diabetes (T2D) demonstrate a reduced exercise capacity, a powerful predictor of cardiovascular mortality, which may be due to reductions in skeletal muscle perfusion and mitochondrial dysfunction. Nitric oxide (NO) is a key molecule involved in in the regulation of blood flow to contracting muscles, as well as a critical mediator in mitochondrial respiration. However, there appears to be a decreased enzymatic synthesis of NO and an overall reduction of bioavailable NO in patients with T2D, which likely contributes to the reduced exercise capacity and tolerance. Accumulating evidence suggests that exogenous nitrate supplementation is an effective option for increasing NO bioavailability in vivo. The purpose of the proposal is to use a randomized, double-blind, placebo controlled study design to comprehensively investigate the impact of 8-weeks of dietary nitrate supplementation on skeletal muscle blood flow, mitochondrial function, and exercise capacity in patients with T2D. The central hypothesis is that increasing NO bioavailability via dietary nitrate supplementation in patients with T2D will lead to improved oxygen delivery and utilization during exercise. To address this hypothesis a highly mechanistic and translational experimental strategy will be used to explore whether increased NO bioavailability via dietary nitrate supplementation improves skeletal muscle perfusion during exercise (Aim 1), enhances mitochondrial biogenesis and function (Aim 2), and improves exercise capacity and efficiency (Aim 3). Collectively, these studies will provide important mechanistic insight into the therapeutic potential of dietary nitrate supplementation for improving skeletal muscle blood flow, mitochondrial function and exercise capacity in patients with T2D. ;
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