Antioxidant effects of natural bioactive compounds

Area of Science:

• Biochemistry
• Cell Biology
• Nutritional Science

Background:

• Reactive oxygen species (ROS) and reactive nitrogen species (RNS) exert both beneficial and detrimental effects in biological systems.
• While ROS are crucial for cellular signaling and defense, elevated levels cause oxidative damage to lipids, proteins, and nucleic acids.
• Accumulated oxidative damage is implicated in age-related diseases like atherosclerosis, arthritis, neurodegenerative disorders, and cancer.

Purpose of the Study:

• To outline the diverse roles of ROS in biological processes and disease pathogenesis.
• To explore the health-promoting properties of natural bioactive compounds found in fruits and vegetables.
• To connect dietary intake of fruits and vegetables with the mitigation of oxidative stress and disease risk.

Main Methods:

• Literature review of ROS/RNS biological functions.
• Analysis of antioxidant mechanisms, including enzymatic and non-enzymatic pathways.
• Examination of epidemiological data linking diet and lifestyle diseases.
• Review of studies on bioactive compounds in fruits and vegetables and their antioxidant capacity.

Main Results:

• ROS participate in essential physiological functions but can induce significant biomolecular damage at high concentrations.
• The body's antioxidant systems, while robust, may be insufficient to prevent age-related oxidative damage.
• Epidemiological evidence strongly associates diets rich in fruits and vegetables with reduced risks of major lifestyle diseases, including cardiovascular disease and cancer.

Conclusions:

• Dietary antioxidants from fruits and vegetables play a critical role in counteracting harmful ROS effects.
• Increased consumption of fruits and vegetables can enhance health by bolstering antioxidant defenses and reducing oxidative stress.
• Natural bioactive compounds in plant-based foods are key contributors to their health-promoting attributes.