Lipid Peroxidation

Metal Drivers#

Heavy Metals are potent initiators of lipid peroxidation. Iron: iron(II) (Fe2+) catalyzes Fenton chemistry (iron(II) + H2O2 → iron(III) + OH• + OH−), generating hydroxyl radicals that attack membrane PUFAs. This is the basis of Ferroptosis.^{[1]Microbial Metallomics and Parkinson's Disease: A Unified Metal-Driven Framework Linking Ferroptosis, Dysbiosis, and alpha-Synuclein PathologyKaren Pendergrass · 2025Open reference 1 ↓[2]Riederer 2021 — Iron as Concert Master in Parkinson's DiseaseRiederer P, Monoranu C, Strobel S et al. · 2021Open reference 2 ↓}

Nickel: Induces lipid peroxidation in brain tissue, correlating with neurobehavioral deficits.^{[3]Effect of Chronic Administration of Nickel on Affective and Cognitive Behavior in Male and Female RatsLamtai M, Azirar S, Zghari O et al. · 2018Open reference 3 ↓}

Cadmium, lead, mercury: All generate ROS and deplete Glutathione (GSH) (the primary endogenous lipid peroxidation defense), amplifying oxidative membrane damage.^{[4]Molecular Mechanisms of Cellular Injury and Role of Toxic Heavy Metals in Chronic Kidney DiseaseManish Mishra, Larry Nichols, Aditi A. Dave et al. · 2022Open reference 4 ↓[5]Heavy Metal Pollution in the Environment and Their Toxicological Effects on HumansBriffa J, Sinagra E, Blundell R · 2020Open reference 5 ↓}

Microbiome Connection#

The Gut Microbiome modulates lipid peroxidation through. Glutathione production: Certain commensals contribute to glutathione synthesis; Dysbiosis reduces the antioxidant pool. SCFA-mediated protection: Butyrate enhances mitochondrial function and reduces ROS generation.

Iron ecology: Microbial iron acquisition (Siderophores) alters the labile iron pool available for Fenton chemistry.