Microglia-driven neuroinflammatory oxidative pathway

The microglia-driven neuroinflammatory oxidative pathway is a pathological signaling cascade in the central nervous system characterized by the chronic activation of microglia and the subsequent release of neurotoxic factors. This process is central to the progression of neurodegenerative diseases, where microglia respond to protein aggregates or cellular debris by upregulating enzymes such as NADPH oxidase (NOX2) and inducible nitric oxide synthase (iNOS) [1][2]. These enzymes produce high levels of reactive oxygen species (ROS) and nitric oxide, which, together with pro-inflammatory cytokines like IL-1β and TNF-α, induce oxidative damage to neurons and promote apoptosis [3]. The pathway is often triggered by the activation of pattern recognition receptors, such as Toll-like receptor 4 (TLR4), and the assembly of the NLRP3 inflammasome [4]. Because this pathway involves multiple molecular components rather than a single receptor, therapeutic strategies focus on inhibiting specific enzymatic drivers or shifting microglial phenotypes toward a homeostatic state [5]. Current research explores small molecule inhibitors and Nrf2 activators to mitigate the oxidative burden and neuroinflammation associated with this pathway in conditions like Alzheimer's and Parkinson's disease [6]. Sources: [1] Block, M. L., et al. (2007). "Microglia-mediated neurotoxicity: uncovering the molecular mechanisms." Nature Reviews Neuroscience. [2] Simpson, D. S. A., & Oliver, P. L. (2020). "ROS Generation in Microglia: Understanding Oxidative Stress and Inflammation in Neurodegenerative Disease." Antioxidants. [3] Glass, C. K., et al. (2010). "Mechanisms underlying inflammation in neurodegeneration." Cell. [4] Heneka, M. T., et al. (2018). "Innate immune activation in neurodegenerative disease." Nature. [5] Subhramanyam, C. S., et al. (2019). "Microglia-mediated neuroinflammation in neurodegenerative diseases." Progress in Neurobiology. [6] Ma, M. W., et al. (2017). "NADPH oxidase in Alzheimer's disease: A novel therapeutic target." Oxidative Medicine and Cellular Longevity.

Other names

Microglial neuroinflammatory-oxidative stress axisMicroglia-mediated neurotoxicityReactive microgliosis pathwayMicroglial M1 polarization pathway

Inhibition of NADPH oxidase (NOX2), suppression of NLRP3 inflammasome activation, and reduction of pro-inflammatory cytokine and reactive oxygen species production.