Neuronal and nonneuronal quantitative BACE immunocytochemical expression in the entorhinohippocampal and frontal regions in Alzheimer's disease.
Details
Serval ID
serval:BIB_46D17A388EDD
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Neuronal and nonneuronal quantitative BACE immunocytochemical expression in the entorhinohippocampal and frontal regions in Alzheimer's disease.
Journal
Dementia and geriatric cognitive disorders
ISSN
1420-8008
Publication state
Published
Issued date
2005
Peer-reviewed
Oui
Volume
19
Number
4
Pages
171-83
Language
english
Notes
Publication types: Journal Article - Publication Status: ppublish
Abstract
In this study, we quantitatively investigated the expression of beta-site amyloid precursor protein cleaving enzyme (BACE) in the entorhinohippocampal and frontal cortex of Alzheimer's disease (AD) and old control subjects. The semiquantitative estimation indicated that the intensity of BACE overall immunoreactivity did not differ significantly between AD and controls, but that a significantly stronger staining was observed in the hippocampal regions CA3-4 compared to other regions in both AD patients and controls. The quantitative estimation confirmed that the number of BACE-positive neuronal profiles was not significantly decreased in AD. However, some degeneration of BACE-positive profiles was attested by the colocalization of neurons expressing BACE and exhibiting neurofibrillary tangles (NFT), as well as by a decrease in the surface area of BACE-positive profiles. In addition, BACE immunocytochemical expression was observed in and around senile plaques (SP), as well as in reactive astrocytes. BACE-immunoreactive astrocytes were localized in the vicinity or close to the plaques and their number was significantly increased in AD entorhinal cortex. The higher amount of beta-amyloid SP and NFT in AD was not correlated with an increase in BACE immunoreactivity. Taken together, these data accent that AD progression does not require an increased neuronal BACE protein level, but suggest an active role of BACE in immunoreactive astrocytes. Moreover, the strong expression in controls and regions less vulnerable to AD puts forward the probable existence of alternate BACE functions.
Keywords
Adult, Aged, Aged, 80 and over, Alzheimer Disease, Amyloid beta-Protein Precursor, Astrocytes, Cell Culture Techniques, Entorhinal Cortex, Female, Frontal Lobe, Hippocampus, Humans, Immunoglobulin G, Immunohistochemistry, Male, Middle Aged
Pubmed
Web of science
Create date
10/03/2008 10:56
Last modification date
20/08/2019 13:52