Bis(7)-tacrine, a promising anti-Alzheimer's agent, reduces hydrogen peroxide-induced injury in rat pheochromocytoma cells: Comparison with tacrine

Xiao Qiu Xiao, Nelson Tze Kin Lee, Paul R. Carlier, Yuan Ping Pang, Yifan Han

Research output: Journal article publicationJournal articleAcademic researchpeer-review

64 Citations (Scopus)


The present study investigates the effects of bis(7)-tacrine, a novel dimeric acetylcholinesterase inhibitor, on hydrogen peroxide(H2O2)-induced cell injury with comparison to the corresponding monomer, tacrine. Exposure of rat pheochromocytoma line PC12 cells to H2O2induced significant cell damage. This reagent also caused redox desequilibrium as indicated by a decrease in activities of intracellular antioxidant enzymes such as glutathione peroxidase as well as catalase and an accumulation of malondialdehyde, a product of lipid peroxidation. Pretreatment of cells with bis(7)-tacrine or tacrine attenuated H2O2-induced cell toxicity, and bis(7)-tacrine demonstrated higher potency than tacrine in improving redox desequilibrium. These results suggest that bis(7)-tacrine and tacrine significantly protect against H2O2insult, which might be beneficial for their potential usage in the prevention and treatment of Alzheimer's disease. (C) 2000 Elsevier Science Ireland Ltd.
Original languageEnglish
Pages (from-to)197-200
Number of pages4
JournalNeuroscience Letters
Issue number3
Publication statusPublished - 1 Sep 2000
Externally publishedYes


  • Acetylcholinesterase inhibitor
  • Bis(7)-tacrine
  • Oxidative stress
  • PC12 cells
  • Tacrine

ASJC Scopus subject areas

  • Neuroscience(all)

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