Related Experiment Videos
Oxidative stress and endothelial function in chronic renal failure.
Margus Annuk1, Mihkel Zilmer1, Lars Lind1
1*Department of Medical Sciences, University Hospital, Uppsala, Sweden; and Department of Biochemistry, University of Tartu, Estonia.
Journal of the American Society of Nephrology : JASN
|December 1, 2001
Summary
Patients with chronic renal failure (CRF) experience impaired endothelium-dependent vasodilation linked to increased oxidative stress. This study highlights the connection between reduced blood vessel function and oxidative damage in CRF patients.
Area of Science:
- Nephrology
- Cardiovascular Physiology
- Biochemistry
Background:
- Chronic renal failure (CRF) is associated with cardiovascular complications.
- Endothelial dysfunction is a hallmark of cardiovascular disease.
- Oxidative stress plays a significant role in various pathologies.
Purpose of the Study:
- To investigate the relationship between oxidative stress and endothelium-dependent vasodilation in patients with CRF.
- To compare markers of oxidative stress and vasodilation in CRF patients versus healthy controls.
Main Methods:
- Forearm blood flow measurements using venous occlusion plethysmography.
- Assessment of endothelium-dependent vasodilation (methacholine) and endothelium-independent vasodilation (sodium nitroprusside).
- Measurement of oxidative stress markers including lipoprotein oxidation lag phase, antioxidative activity, and glutathione redox state.
Main Results:
- CRF patients exhibited impaired endothelium-dependent vasodilation compared to controls.
- Patients with CRF showed a shorter lipoprotein oxidation lag phase and elevated levels of diene conjugates, lipid hydroperoxide, and GSSG.
- Endothelium-dependent vasodilation was correlated with oxidative stress markers, including total antioxidative activity, GSH, GSSG, and diene conjugates.
Conclusions:
- Oxidative stress is closely related to impaired endothelium-dependent vasodilation in patients with CRF.
- These findings suggest that oxidative stress contributes to endothelial dysfunction in renal insufficiency.
- Targeting oxidative stress may be a potential therapeutic strategy for improving vascular function in CRF.