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Antioxidant enzymes and human diseases
J M Matés1, C Pérez-Gómez, I Núñez de Castro
1Department of Molecular Biology and Biochemistry, Faculty of Sciences, University of Málaga, Spain. jmates@uma.es
Objectives:
To describe the importance of the antioxidant enzymes superoxide dismutase, glutathione peroxidase, and catalase working together in human cells against toxic reactive oxygen species, their relationship with several pathophysiologic processes and their possible therapeutic implications.
Conclusions:
Reactive oxygen species (ROS) are involved in the cell growth, differentiation, progression, and death. Low concentrations of ROS may be beneficial or even indispensable in processes such as intracellular signaling and defense against micro-organisms. Nevertheless, higher amounts of ROS play a role in the aging process as well as in a number of human disease states, including cancer, ischemia, and failures in immunity and endocrine functions. As a safeguard against the accumulation of ROS, several nonenzymatic and enzymatic antioxidant activities exist. Therefore, when oxidative stress arises as a consequence of a pathologic event, a defense system promotes the regulation and expression of these enzymes.
Insights
Antioxidant enzymes like superoxide dismutase, glutathione peroxidase, and catalase protect human cells from damaging reactive oxygen species (ROS). Their coordinated action is crucial for health, with dysregulation linked to aging and diseases.
Area of Science:
- Biochemistry and Molecular Biology
- Cellular Physiology
- Oxidative Stress Research
Background:
- Reactive oxygen species (ROS) are integral to cellular processes, including signaling and defense.
- Elevated ROS levels contribute to aging and various pathologies like cancer and immune dysfunction.
Purpose of the Study:
- To elucidate the synergistic role of antioxidant enzymes in mitigating ROS.
- To explore the connection between these enzymes and pathophysiological conditions.
- To discuss potential therapeutic strategies targeting antioxidant defense.
Main Methods:
- Literature review on antioxidant enzyme function.
- Analysis of the interplay between ROS and cellular health.
- Examination of pathophysiological links to oxidative stress.
Main Results:
- Superoxide dismutase, glutathione peroxidase, and catalase form a critical defense network against ROS.
- Imbalances in ROS are implicated in cellular dysfunction and disease progression.
Conclusions:
- The coordinated action of antioxidant enzymes is vital for cellular homeostasis.
- Oxidative stress, driven by ROS, plays a significant role in aging and diseases.
- Therapeutic interventions targeting antioxidant pathways hold promise for disease management.