Oxidative stress defense and repair systems of the ocular lens

Lisa Ann Brennan, Rebecca Susan McGreal, Marc Kantorow

Research output: Contribution to journalReview articlepeer-review

38 Scopus citations


It is well accepted that reactive oxygen species (ROS) play a critical role in many biological processes including disease and longevity. Oxidation of proteins has been linked to many disease states and even the aging process itself. This was first proposed as "The free radical theory of aging" in 1956 by Denham Harman which suggests that free radicals causes cumulative and irreversible damage to macromolecules, loss of cellular function and cell death over time directly impacting health and lifespan. Cellular damage from ROS exposure has been termed oxidative stress, which is an imbalance between cellular ROS production and the ability of the cell to regulate ROS levels and repair damage caused by ROS. This review focuses on the role of oxidative stress in the eye lens as a model for understanding the role of oxidative stress systems in age-related human disease.

Original languageEnglish (US)
Pages (from-to)141-155
Number of pages15
JournalFrontiers in Bioscience - Elite
Volume4 E
Issue number1
StatePublished - Jan 1 2012
Externally publishedYes


  • Age-related cataract
  • Antioxidant defense
  • Antioxidant enzymes
  • Chaperone proteins
  • Lens
  • Oxidative stress
  • Protein aggregation
  • Protein oxidation
  • Protein repair
  • Reactive oxygen species
  • Review

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Immunology and Microbiology(all)


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