Oxidative stress and redox-active iron in Alzheimer's disease

Kazuhiro Honda, Gemma Casadesus, Robert B. Petersen, George Perry, Mark A. Smith

Research output: Contribution to journalReview articlepeer-review

173 Scopus citations

Abstract

Many lines of evidence indicate that oxidative stress is one of the earliest events in the genesis of Alzheimer's disease (AD). Iron is a transition metal capable of generating hydroxyl radicals, the most potent reactive oxygen species. Consequently, a disruption in the metabolism of iron has been postulated to have a role in the pathogenesis of AD. Indeed, both senile plaques and neorofibrillary tangles, the major pathological landmarks of AD, as well as neurons in the earliest stages of the disease, show elevated iron deposition. However, it is clear that the iron bound to lesion-associated proteins such as amyloid-β and tau plays only a minor, late role in the disease, with the RNA-associated iron found in the neuronal cytoplasm occurring early and being of paramount importance. In this regard, it is probably not surprising that there is significant oxidation of cytoplasmic RNA among the populations of neurons vulnerable to AD. In this review, we consider the role of iron-induced oxidative stress as a key event in AD pathophysiology.

Original languageEnglish
Pages (from-to)179-182
Number of pages4
JournalAnnals of the New York Academy of Sciences
Volume1012
DOIs
StatePublished - 2004

Keywords

  • Alzheimer's disease
  • Amyloid-β
  • Iron
  • Mitochondria
  • RNA
  • Redox

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