Metal exposure and Alzheimer's pathogenesis

Journal of Structural Biology
Guijian LiuXudong Huang

Abstract

With the growing aging population in Western countries, Alzheimer's disease (AD) has become a major public health concern. No preventive measure and effective treatment for this burdensome disease is currently available. Genetic, biochemical, and neuropathological data strongly suggest that Abeta amyloidosis, which originates from the amyloidogenic processing of a metalloprotein-amyloid precursor protein (APP), is the key event in AD pathology. However, neurochemical factors that impact upon the age-dependent cerebral Abeta amyloidogenesis are not well recognized. Growing data indicate that cerebral dysregulation of biometals, environmental metal exposure, and oxidative stress contribute to AD pathology. Herein we provided further evidence that both metals (such as Cu) and H(2)O(2) promote formation of neurotoxic Abeta oligomers. Moreover, we first demonstrated that laser capture microdissection coupled with X-ray fluorescence microscopy can be applied to determine elemental profiles (S, Fe, Cu, and Zn) in Abeta amyloid plaques. Clearly the fundamental biochemical mechanisms linking brain biometal metabolism, environmental metal exposure, and AD pathophysiology warrant further investigation. Nevertheless, the study of APP and A...Continue Reading

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