Oxidative stress and inflammatory cytokine pathways

Oxidative stress and inflammatory cytokine pathways represent a complex, bidirectional network of biological processes essential for cellular defense but often implicated in chronic disease when dysregulated. Oxidative stress arises from an imbalance between the production of reactive oxygen species (ROS) and the capacity of antioxidant systems to neutralize them, leading to oxidative damage of lipids, proteins, and DNA (Hussain et al., 2016, PMID: 27535255). This state frequently activates redox-sensitive transcription factors, most notably Nuclear Factor-kappa B (NF-kappaB), which triggers the expression of pro-inflammatory cytokines such as TNF-alpha, IL-1, and IL-6 (Reuter et al., 2010, PMID: 21113595). Conversely, these cytokines can further stimulate ROS production via enzymes like NADPH oxidase, creating a self-amplifying loop that drives chronic inflammation and tissue injury. Therapeutic intervention focuses on breaking this cycle by either inhibiting specific cytokine signaling or enhancing the Nuclear factor erythroid 2-related factor 2 (Nrf2) pathway, which governs the expression of over 200 cytoprotective and antioxidant genes (Liby & Sporn, 2012, PMID: 22406813). While targeting these pathways is effective in treating conditions like rheumatoid arthritis and psoriasis, challenges include maintaining the delicate balance of physiological ROS signaling and avoiding excessive immunosuppression.

Other names

Redox-inflammatory signalingOxidative-inflammatory axisPro-inflammatory and pro-oxidant pathwaysROS-cytokine signaling network

Modulation of these pathways typically involves the direct neutralization of pro-inflammatory cytokines (e.g., TNF-alpha, IL-6), the inhibition of redox-sensitive transcription factors like NF-kappaB, or the pharmacological activation of the Nrf2-Keap1 pathway to upregulate endogenous antioxidant enzymes.