alexa Hormesis and amyloid-β protein: physiology or pathology?
Biochemistry

Biochemistry

Journal of Membrane Science & Technology

Author(s): Morley JE, Farr SA

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Abstract Hormesis is the concept that low doses of a toxin can have beneficial effects while high doses are harmful. This is also known as the inverted-U shaped dose-response curve. Hormesis appears to be a universal law for the function of memory mimetics. Amyloid-β protein is widely recognized to be a toxic agent responsible for plaque formation in Alzheimer's disease. In high doses it also produces amnesia. In lower, physiological doses, it enhances long term potentiation and memory. Blocking amyloid-β protein in animals without overproduction of the protein results in amnesia. At low doses, amyloid-β also increases neurite outgrowth, produces presynaptic enhancement, and may quench oxidative damage. It is postulated that both over- and underproduction of amyloid-β can lead to memory deficits. This is similar to a number of hormonal diseases, e.g., thyroid, where both low and high levels produce disease. This article was published in J Alzheimers Dis and referenced in Journal of Membrane Science & Technology

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