Oxidative Stress Overview

Principles

Definition

Oxidative stress is an academic concept and research area investigating the cellular and molecular damage resulting from an imbalance between the production of reactive oxygen species and the capacity of a biological system to detoxify these reactive intermediates or repair the resulting damage. This imbalance is significant for its role in numerous physiological processes, pathological conditions, and aging, making it a central focus in fields like cell biology, biochemistry, and medicine.

Ontological type

Molecular Mechanisms

Cellular Antioxidant Systems

Pathophysiological Roles

Key developments

Key Figures

Free Radical Foundations era

Denham Harman [1] was active at University of California, Berkeley [3] and Leman University [4] during this era. The Aging: A Theory Based on Free Radical and Radiation Chemistry [6] paper articulated a radical-based mechanism of aging and highlighted oxidative stress as a central driver of metabolic and pathological processes. Albert L. Lehninger [2] studied at Johns Hopkins University [5] and University of California, Berkeley [3] during this era. His 1955 paper The action of thyroxine on mitochondria and oxidative phosphorylation [7] and 1956 paper OXIDATIVE PHOSPHORYLATION BY AN ENZYME COMPLEX FROM EXTRACTS OF MITOCHONDRIA [8] helped establish mitochondrial regulation of energy metabolism and the enzymatic basis of oxidative phosphorylation, signaling a shift toward molecular understandings of metabolism in this era.

Redox Signaling Consolidation era

Irwin Fridovich [1] engaged with Harvard University [3] and Baylor College of Medicine [4] during the Redox Signaling Consolidation era. His key contributions include the discovery and characterization of Superoxide Dismutase [5], the autoxidation study The Role of Superoxide Anion in the Autoxidation of Epinephrine and a Simple Assay for Superoxide Dismutase [6], and The Biology of Oxygen Radicals [7], which established superoxide and related species as diffusible redox messengers and anchored enzymology for oxidative stress. Barry Halliwell [2] pursued this work at Harvard University [3] and Baylor College of Medicine [4] during this era. His contributions include Free radicals in biology and medicine [8], a synthesis that shaped how redox biology links metabolism to inflammation and aging; and Inhibition of the iron-catalysed formation of hydroxyl radicals from superoxide and of lipid peroxidation by desferrioxamine [9], which highlighted iron-catalyzed ROS pathways and lipid peroxidation control.

Signaling-Centric Redox era

Brent R. Stockwell[1] is a leading figure associated with Columbia University[3] in this era of redox signaling and ferroptosis research. His key contributions include the discovery that oxidized arachidonic and adrenic phosphatidylethanolamines navigate cells to ferroptosis[6], and the demonstration that ferrostatins inhibit oxidative lipid damage and ferroptotic cell death in diverse disease models[7], which provided mechanistic and therapeutic anchors for oxidative stress signaling in this period. Marcus Conrad[2] is associated with University of Würzburg[4] and Johannes Gutenberg University Mainz[5] during this era. His contributions include elucidating the mechanism of cytoprotection by Ferrostatin-1 and Liproxstatin-1 and the role of lipid peroxidation in ferroptotic cell death in the 2017 paper On the Mechanism of Cytoprotection by Ferrostatin-1 and Liproxstatin-1 and the Role of Lipid Peroxidation in Ferroptotic Cell Death[8], which advanced the understanding of ferroptosis signaling and aided development of targeted redox therapeutics.