Antioxidant and neuroprotective pathways

Antioxidant and neuroprotective pathways encompass a diverse array of biological processes designed to protect neurons from oxidative damage and subsequent cell death. These pathways function by neutralizing reactive oxygen species (ROS), enhancing the activity of endogenous enzymes such as superoxide dismutase (SOD) and glutathione peroxidase, and modulating signaling cascades like the Nrf2/ARE axis (PMID: 25972068). In neurodegenerative conditions such as Amyotrophic Lateral Sclerosis (ALS) and Parkinson's disease, the failure of these protective mechanisms leads to mitochondrial dysfunction and protein aggregation. Therapeutic interventions, such as the free radical scavenger Edaravone, aim to slow disease progression by reducing oxidative stress (PMID: 28832218). Other agents like N-acetylcysteine and Idebenone work by replenishing cellular glutathione or supporting mitochondrial electron transport. Despite their potential, targeting these pathways is complex due to the non-specific nature of redox biology and the challenge of delivering effective concentrations of drugs across the blood-brain barrier (PMID: 30703311). Clinical trials in this space often face hurdles because oxidative stress is frequently a secondary consequence rather than the primary driver of disease. Consequently, while these pathways are vital for cell survival, they are often considered broad therapeutic categories rather than specific molecular targets.

Other names

NeuroprotectionOxidative stress responseFree radical scavengingCytoprotective pathwaysRedox signaling pathways

Direct scavenging of reactive oxygen species and activation of endogenous antioxidant defense systems such as the Nrf2-ARE pathway.