Protective effect of D609 against amyloid-beta1-42-induced oxidative modification of neuronal proteins: redox proteomics study

Journal of Neuroscience Research
Rukhsana SultanaD Allan Butterfield

Abstract

Oxidative stress has been implicated in the pathophysiology of a number of diseases, including neurodegenerative disorders such as Alzheimer's disease (AD), a neurodegenerative disorder associated with cognitive decline and enhanced oxidative stress. Amyloid-beta peptide(1-42) (Abeta(1-42)), one of the main component of senile plaques, can induce in vitro and in vivo oxidative damage to neuronal cells through its ability to produce free radicals. The aim of this study was to investigate the protective effect of the xanthate D609 on Abeta(1-42)-induced protein oxidation by using a redox proteomics approach. D609 was recently found to be a free radical scavenger and antioxidant. In the present study, rat primary neuronal cells were pretreated with 50 microM of D609, followed by incubation with 10 microM Abeta(1-42) for 24 hr. In the cells treated with Abeta(1-42) alone, four proteins that were significantly oxidized were identified: glyceraldehyde-3-phosphate dehydrogenase, pyruvate kinase, malate dehydrogenase, and 14-3-3 zeta. Pretreatment of neuronal cultures with D609 prior to Abeta(1-42) protected all the identified oxidized proteins in the present study against Abeta(1-42)-mediated protein oxidation. Therefore, D609 may ame...Continue Reading

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