Neuroprotective antioxidant and anti-inflammatory pathways in the central nervous system

Neuroprotective antioxidant and anti-inflammatory pathways in the central nervous system refer to a complex network of endogenous signaling mechanisms designed to maintain cellular homeostasis and protect neural tissues from damage. The central component of these pathways is the Nuclear factor erythroid 2-related factor 2 (Nrf2), a transcription factor that regulates the expression of over 200 cytoprotective genes (PubMed: 25972068). Under conditions of oxidative stress, Nrf2 translocates to the nucleus and binds to the Antioxidant Response Element (ARE), triggering the production of enzymes like Heme oxygenase-1 (HO-1) and Superoxide dismutase (SOD) (PubMed: 23434244). These pathways also involve the cross-regulation of pro-inflammatory mediators, such as the inhibition of the Nuclear factor-kappa B (NF-κB) signaling cascade, which helps to dampen neuroinflammation (PubMed: 22992391). The therapeutic targeting of these pathways is a major focus in treating neurodegenerative diseases like Multiple Sclerosis (MS), Alzheimer's, and Parkinson's disease, where chronic oxidative stress and inflammation drive neuronal loss (PubMed: 30107164). Drugs such as Dimethyl fumarate and Omaveloxolone act as Nrf2 activators, enhancing the brain's natural defenses to slow disease progression (PubMed: 23434244, PubMed: 31604830). While effective, modulating these broad pathways presents challenges, including potential off-target effects and the Nrf2 paradox, where overactivation may inadvertently support the survival of malignant cells (PubMed: 29456131). Monitoring biomarkers like HO-1 levels and oxidative stress indicators is often used to assess the efficacy of these treatments in clinical settings.

Other names

Nrf2-Keap1 pathwayAntioxidant Response Element (ARE) pathwayEndogenous neuroprotective signalingRedox-sensitive anti-inflammatory pathwaysPhase II antioxidant response

Activation of the Nrf2-ARE signaling axis to upregulate antioxidant enzymes and concurrent inhibition of pro-inflammatory pathways such as NF-κB.