Oxidative stress and neurodegenerative disorders

Area of Science:

• Neuroscience
• Biochemistry
• Toxicology

Background:

• Oxidative insults, including excitotoxicity and inflammation, trigger cell death pathways.
• Reactive oxygen species (ROS), particularly hydroxyl and peroxynitrite, cause significant cellular damage.
• Neurodegenerative disorders are linked to oxidative damage to proteins, lipids, and nucleic acids.

Purpose of the Study:

• To review the role of oxidative stress in neurodegeneration.
• To highlight the protective effects of natural antioxidants and specific drugs against ROS.
• To explore the potential of antioxidant molecules in preventing neurodegenerative diseases.

Main Methods:

• Literature review of studies on oxidative stress and neurodegeneration.
• Analysis of the mechanisms of ROS generation and cellular damage.
• Evaluation of the efficacy of natural antioxidants and pharmacological agents.

Main Results:

• Oxidative insults initiate signaling cascades leading to apoptosis and neurodegeneration.
• Hydroxyl and peroxynitrite are identified as highly damaging ROS.
• Natural antioxidants (tocopherol, ascorbic acid, glutathione) and enzymes (SOD, catalase, GPx) offer protection.
• Polyphenols and drugs like probucol and seligilline demonstrate cell protection against ROS.

Conclusions:

• Oxidative stress is a key factor in the pathogenesis of neurodegenerative disorders.
• Existing natural and pharmacological antioxidant strategies show potential for neuroprotection.
• Further development of antioxidant molecules is crucial for preventing neurodegenerative diseases.