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Oxidative stress and vascular disease.
Nageswara R Madamanchi1, Aleksandr Vendrov, Marschall S Runge
1Carolina Cardiovascular Biology Center, Department of Medicine, University of North Carolina, Chapel Hill 27599-7005, USA.
Arteriosclerosis, Thrombosis, and Vascular Biology
|November 13, 2004
Summary
Reactive oxygen species (ROS) play a key role in cardiovascular diseases (CVD) by driving vascular inflammation and atherosclerosis. Future research should focus on targeted antioxidants and better biomarkers for effective CVD treatment.
Area of Science:
- Cardiovascular Research
- Oxidative Stress Biology
- Vascular Cell Signaling
Background:
- Cardiovascular diseases (CVD) are significantly influenced by the overproduction of reactive oxygen species (ROS) under pathological conditions.
- ROS are generated by multiple cellular sources, including NADPH oxidase, mitochondria, and uncoupled nitric oxide synthase, contributing to vascular inflammation and atherogenesis.
- Oxidative stress is increasingly recognized as a unifying mechanism linking various CVD risk factors.
Purpose of the Study:
- To review the evidence implicating reactive oxygen species (ROS) in the development and progression of cardiovascular diseases (CVD).
- To discuss the challenges and potential future directions in targeting oxidative stress for CVD prevention and treatment.
Main Methods:
- Review of existing scientific literature on reactive oxygen species, oxidative stress, and cardiovascular diseases.
- Analysis of findings from animal models and human investigations regarding the role of ROS in atherosclerosis.
- Evaluation of the outcomes of clinical trials involving antioxidants for CVD prevention.
Main Results:
- Evidence from cellular and animal studies strongly supports a causal role for ROS in atherosclerosis and CVD.
- Human studies also corroborate the oxidative stress hypothesis of atherosclerosis.
- Clinical trials using antioxidants have shown limited success in reducing cardiovascular morbidity and mortality, prompting reevaluation.
Conclusions:
- Despite strong evidence for ROS involvement, the clinical ineffectiveness of antioxidants may stem from a lack of specific biomarkers for oxidative stress phenotypes.
- Future research should explore the complexity of redox reactions, develop targeted antioxidants, and utilize phenotype-genotype analysis for better therapeutic strategies.
- Advancements in understanding and targeting oxidative stress are crucial for developing effective pharmacological and regenerative therapies for CVD.