Related Experiment Video

Updated: Jun 23, 2026

Analysis of Oxidative Stress in Zebrafish Embryos
11:05

Analysis of Oxidative Stress in Zebrafish Embryos

Published on: July 7, 2014

Oxygen toxicity and reactive oxygen species: the devil is in the details

Richard L Auten1, Jonathan M Davis

  • 1Department of Pediatrics, Duke Medical Center, Durham, NC 27710, USA.

Pediatric Research
|April 25, 2009
PubMed

Insights

Reactive oxygen species (ROS) are vital for cell signaling but can cause damage when imbalanced. This review explores ROS origins, targets, and antioxidant defenses for disease prevention and treatment.

Area of Science:

  • Biochemistry
  • Cell Biology
  • Pathophysiology

Background:

  • Reactive oxygen species (ROS) are crucial for normal cellular signaling.
  • Excessive ROS production can damage cellular components, disrupting physiology.
  • An imbalance between ROS and antioxidant defenses is linked to diseases like cancer and retinopathy.

Purpose of the Study:

  • To review the origins of endogenous and exogenous ROS.
  • To discuss the molecular, cellular, and physiological targets of ROS.
  • To present antioxidant defenses and therapeutic strategies for ROS-related diseases, focusing on child development.

Main Methods:

  • Literature review of ROS generation, targets, and antioxidant mechanisms.
  • Analysis of pathological and physiological implications of ROS.
  • Discussion of therapeutic interventions using antioxidants.

Main Results:

  • ROS have dual roles: signaling molecules and damaging agents.
  • ROS-induced damage contributes to various human diseases.
  • Antioxidant defenses play a critical role in mitigating ROS toxicity.

Conclusions:

  • Understanding ROS is key to addressing diseases linked to oxidative stress.
  • Targeting ROS pathways and enhancing antioxidant defenses offers therapeutic potential.
  • Further research into ROS in child development is warranted.

More Related Videos

High Throughput Screening Assessment of Reactive Oxygen Species (ROS) Generation using Dihydroethidium (DHE) Fluorescence Dye05:16

High Throughput Screening Assessment of Reactive Oxygen Species (ROS) Generation using Dihydroethidium (DHE) Fluorescence Dye

Published on: January 19, 2024

Simultaneous Measurement of Superoxide/Hydrogen Peroxide and NADH Production by Flavin-containing Mitochondrial Dehydrogenases08:57

Simultaneous Measurement of Superoxide/Hydrogen Peroxide and NADH Production by Flavin-containing Mitochondrial Dehydrogenases

Published on: February 24, 2018

Related Concept Videos

Oxygen Requirements and Growth Patterns01:29

Oxygen Requirements and Growth Patterns

Microorganisms exhibit diverse oxygen requirements and growth patterns driven by their metabolic strategies and environmental adaptations. Oxygen, while essential for many organisms, can also be toxic under certain conditions, shaping how microorganisms grow and survive.Oxygen Requirements of MicroorganismsMicroorganisms are classified based on their ability to use or tolerate oxygen:● Obligate aerobes like Mycobacterium tuberculosis need oxygen for energy production, as it serves as the...
Toxic Reactions: Overview01:26

Toxic Reactions: Overview

When toxic substances penetrate the human body, they disseminate to various tissues, undergoing metabolic changes. This process yields reactive metabolites that may covalently bind with specific target molecules, resulting in toxicity.
Toxicity falls into two primary categories: local and systemic.
Local toxicity appears at the exposure site, such as protein denaturation caused by caustic substances.
In contrast, systemic toxicity requires the toxic agent's absorption and distribution,...
Bioactivation and Tissue Toxicity01:25

Bioactivation and Tissue Toxicity

Bioactivation is a metabolic process that transforms less reactive substances into highly reactive metabolites, initiating tissue toxicity. This transformation can lead to various toxic effects, including carcinogenesis and teratogenesis. Reactive metabolites are classified into two main types: electrophiles and free radicals.Electrophiles are electron-deficient species and are produced primarily by the enzyme cytochrome P-450 during the metabolism of compounds containing carbon, nitrogen, or...
Radical Autoxidation01:20

Radical Autoxidation

The oxidation of an organic compound in the presence of air or oxygen is called autoxidation. For example, cumene reacts with oxygen to form hydroperoxide. Autoxidation involves initiation, propagation, and termination steps. Many organic compounds are susceptible to autoxidation—especially ethers in the presence of oxygen, which form hydroperoxides. Even though this reaction is slow, old ether bottles contain small amounts of peroxide, which leads to laboratory explosions during ether...
Electron Transport Chain: Complex III and IV01:43

Electron Transport Chain: Complex III and IV

During the electron transport chain, electrons from NADH and FADH2 are first transferred to complexes I and II, respectively. These two complexes then transfer the electrons to ubiquinol, which carries them further to complex III. Complex III passes the electrons across the intermembrane space to Cyt c, which carries them further to complex IV. Complex IV donates electrons to oxygen and reduces it to water. As electrons pass through complexes I, III, and IV, the energy released aids the pumping...
Oxygen Transport in the Blood01:27

Oxygen Transport in the Blood

Hemoglobin (Hb) is a crucial molecule in the human body, consisting of four polypeptide chains, each bound to an iron-containing heme group. This unique structure enables hemoglobin to bind to oxygen, with each molecule capable of combining with four molecules of oxygen, leading to rapid and reversible oxygen loading. When fully loaded with oxygen, it is called oxyhemoglobin, while hemoglobin that has released oxygen is called reduced hemoglobin or deoxyhemoglobin. As hemoglobin binds oxygen,...