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


Journal Article (Review)

Reactive oxygen species (ROS) serve as cell signaling molecules for normal biologic processes. However, the generation of ROS can also provoke damage to multiple cellular organelles and processes, which can ultimately disrupt normal physiology. An imbalance between the production of ROS and the antioxidant defenses that protect cells has been implicated in the pathogenesis of a variety of diseases, such as cancer, asthma, pulmonary hypertension, and retinopathy. The nature of the injury will ultimately depend on specific molecular interactions, cellular locations, and timing of the insult. This review will outline the origins of endogenous and exogenously generated ROS. The molecular, cellular, pathologic, and physiologic targets will then be discussed with a particular emphasis on aspects relevant to child development. Finally, antioxidant defenses that scavenge ROS and mitigate associated toxicities will be presented, with a discussion of potential therapeutic approaches for the prevention and/or treatment of human diseases using enzymatic and nonenzymatic antioxidants.

Full Text

Cited Authors

  • Auten, RL; Davis, JM

Published Date

  • August 2009

Published In

Volume / Issue

  • 66 / 2

Start / End Page

  • 121 - 127

PubMed ID

  • 19390491

Pubmed Central ID

  • 19390491

Electronic International Standard Serial Number (EISSN)

  • 1530-0447

International Standard Serial Number (ISSN)

  • 0031-3998

Digital Object Identifier (DOI)

  • 10.1203/pdr.0b013e3181a9eafb


  • eng