Copper in the Brain and Alzheimer's Disease

Overview

Journal J Biol Inorg Chem

Publisher Springer

Specialty Biochemistry

Date 2009 Oct 29

PMID 19862561

Citations 100

Authors

Ya Hui Hung

Ashley I Bush

Robert Alan Cherny

Affiliations

Soon will be listed here.

Abstract

Alzheimer's disease (AD) is the most common form of neurodegenerative disease. The brain is particularly vulnerable to oxidative damage induced by unregulated redox-active metals such as copper and iron, and the brains of AD patients display evidence of metal dyshomeostasis and increased oxidative stress. The colocalisation of copper and amyloid beta (Abeta) in the glutamatergic synapse during NMDA-receptor-mediated neurotransmission provides a microenvironment favouring the abnormal interaction of redox-potent Abeta with copper under conditions of copper dysregulation thought to prevail in the AD brain, resulting in the formation of neurotoxic soluble Abeta oligomers. Interactions between Abeta oligomers and copper can further promote the aggregation of Abeta, which is the core component of extracellular amyloid plaques, a central pathological hallmark of AD. Copper dysregulation is also implicated in the hyperphosphorylation and aggregation of tau, the main component of neurofibrillary tangles, which is also a defining pathological hallmark of AD. Therefore, tight regulation of neuronal copper homeostasis is essential to the integrity of normal brain functions. Therapeutic strategies targeting interactions between Abeta, tau and metals to restore copper and metal homeostasis are discussed.

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