Metabolic Brain Disease

, Volume 19, Issue 3–4, pp 313–329 | Cite as

Oxidative Stress in the Pathogenesis of Hepatic Encephalopathy

  • M. D. Norenberg
  • A. R. Jayakumar
  • K. V. Rama Rao

Abstract

The pathogenesis of hepatic encephalopathy (HE) remains elusive. While it is clear that ammonia is the likely toxin and that astrocytes are the main target of its neurotoxicity, precisely how ammonia brings about cellular injury is poorly understood. Studies over the past decade have invoked the concept of oxidative stress as a pathogenetic mechanism for ammonia neurotoxicity. This review sets out the arguments in support of this concept based on evidence derived from human observations, animal studies, and cell culture investigations. The consequences and potential therapeutic implications of oxidative stress in HE are also discussed.

Ammonia glutamine manganese peripheral benzodiazepine receptor cell swelling mitochondrial permeability transition free radicals 

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Copyright information

© Plenum Publishing Corporation 2004

Authors and Affiliations

  • M. D. Norenberg
    • 1
    • 2
    • 3
  • A. R. Jayakumar
    • 1
  • K. V. Rama Rao
    • 1
  1. 1.Department of PathologyUniversity of Miami School of MedicineMiamiFlorida
  2. 2.Department of Biochemistry & Molecular BiologyUniversity of Miami School of MedicineMiamiFlorida
  3. 3.Veterans Affairs Medical CenterMiamiFlorida

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