Molecular Mechanisms behind Free Radical Scavengers Function against Oxidative Stress

Area of Science:

• Biochemistry
• Neuroscience
• Pathology

Background:

• Oxidative stress is implicated in numerous human diseases, including rheumatoid arthritis, Alzheimer's, Parkinson's, and cancers.
• Neurodegenerative diseases, particularly Parkinson's disease, are significantly influenced by oxidative conditions.
• Cellular reactive oxygen and nitrogen species (ROS and RNS) are key contributors to oxidative stress.

Purpose of the Study:

• To discuss the significance of oxidative conditions in various diseases.
• To focus on the role of oxidative stress in neurodegenerative diseases, with an emphasis on Parkinson's disease.
• To review natural antioxidant systems and therapeutic scavengers used in disease treatment.

Main Methods:

• Discussion of enzymatic and non-enzymatic natural antioxidant systems.
• Review of therapeutic free radical scavengers like L-DOPA and Edaravone.
• Analysis of the mechanisms by which L-DOPA and Edaravone confer cell survival against oxidative stress.

Main Results:

• Natural antioxidants include enzymes (e.g., catalase) and dietary components (e.g., vitamin C, flavonoids).
• L-DOPA and Edaravone demonstrate cell-protective properties against oxidative stress by altering stress proteins.
• L-DOPA may induce hypoxia and ORP150, while Edaravone directly induces Peroxiredoxin-2 and inhibits apoptosis.

Conclusions:

• Oxidative stress is a critical factor in the pathogenesis of various diseases, especially neurodegenerative disorders.
• Both natural and therapeutic antioxidants play vital roles in mitigating oxidative damage.
• L-DOPA and Edaravone offer distinct yet complementary mechanisms for protecting cells against oxidative insults.