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Should Alzheimer's disease be equated with human brain ageing?: A maladaptive interaction between brain evolution and senescence

Lookup NU author(s): Dr David Neill

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Abstract

In this review Alzheimer's disease is seen as a maladaptive interaction between human brain evolution and senescence. It is predicted to occur in everyone although does not necessarily lead to dementia. The pathological process is initiated in relation to a senescence mediated functional down-regulation in the posteromedial cortex (Initiation Phase). This leads to a loss of glutamatergic excitatory input to layer II entorhinal cortex neurons. A human specific maladaptive neuroplastic response is initiated in these neurons leading to neuronal dysfunction, NFT formation and death. This leads to further loss of glutamatergic excitatory input and propagation of the maladaptive response along excitatory pathways linking evolutionary progressed vulnerable neurons (Propagation Phase). Eventually neurons are affected in many brain areas resulting in dementia. Possible therapeutic approaches include enhancing glutamatergic transmission. The theory may have implications with regards to how Alzheimer's disease is classified. (C) 2011 Elsevier B.V. All rights reserved.

Publication metadata

Author(s): Neill D

Publication type: Review

Publication status: Published

Journal: Ageing Research Reviews

Year: 2012

Volume: 11

Issue: 1

Pages: 104-122

Print publication date: 08/07/2011

ISSN (print): 1568-1637

ISSN (electronic): 1872-9649

Publisher: ELSEVIER IRELAND LTD

URL: http://dx.doi.org/10.1016/j.arr.2011.06.004

DOI: 10.1016/j.arr.2011.06.004

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