Cardiovascular Diseases Clinical Trial
Official title:
Effect of Different Treatment Strategies on Mitochondrial Function in Peripheral Arterial Disease - a Randomized Controlled Trial
The aim of this study is to investigate the effect of different treatment strategies on mitochondrial function and to correlate in-vitro results to findings from in-vivo measurements of mitochondrial function. The authors hypothesize that interventional revascularization and therefore the restoration of blood and oxygen supply is more relevant to mitochondrial function compared to the effect of exercise training.
Resulting from a chronic narrowing of arteries by atherosclerotic lesions, the leading clinical symptom of peripheral arterial disease (PAD), a walking induced pain, reduces quality of life of patients. Affected muscle regions are altered by a characterized myopathy and mitochondria are known to play a crucial role in this pathophysiological mechanism. There are different methodological approaches to investigate mitochondrial function in-vivo as well as in-vitro. Regarding our own preliminary data, mitochondria are known to recover after successful revascularization. The effect of different treatment strategies on mitochondrial function and the correlation of in-vitro to clinical more applicable in-vivo methods was understudied so far. The overall aim of this study is to investigate the effect of different treatment strategies on mitochondrial function and to correlate in-vitro results to findings from in-vivo measurements of mitochondrial function. The authors hypothesize that interventional revascularization and therefore the restoration of blood and oxygen supply is more relevant to mitochondrial function compared to the effect of exercise training. Patients with isolated pathologies of the superficial femoral artery and symptomatic PAD (Fontaine stage IIB) will be included and randomized to different treatment groups (conservative treatment versus interventional revascularization). Near-infrared refracted spectroscopy and the TIVITA ® hyperspectral camera will be used for in-vivo measurement of peripheral oxygen saturation and distal perfusion before and after an exercise. Muscle biopsies will be obtained from affected (gastrocnemius muscle) as well as from unaffected muscle (lateral vastus muscle) shortly before and 12 weeks after initiating treatment. Muscle samples will be investigated by measurement of CSA regarding mitochondrial content and HRR regarding mitochondrial respiration as well as for oxidative stress. ;
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