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Distinct Patterns of Sirtuin Expression During Progression of Alzheimer’s Disease
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Distinct Patterns of Sirtuin Expression During Progression of Alzheimer’s Disease
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Journal Article
Distinct Patterns of Sirtuin Expression During Progression of Alzheimer’s Disease
2014
Overview
Aging is one of the major risk factors for Alzheimer’s disease (AD). Sirtuins are associated with prolonged life span. To examine whether the expression levels of sirtuins associate with the progression of AD or not, we performed a comparative immunoblotting and immunohistochemical study of SIRT1, 3, and 5 in the entorhinal cortex and hippocampal subregions and white matter in 45 cases grouped according to Braak and Braak stages of neurofibrillary degeneration. In addition, we compared the expression levels with the local load of tau and amyloid-beta deposits, evaluated using morphometry. Our study revealed that (1) the neuronal subcellular redistribution of SIRT1 parallels the decrease in its expression, suggesting stepwise loss of neuroprotection dependent on the neuronal population; (2) in contrast to SIRT1 and 3, expression of SIRT5 increases during the progression of AD; (3) which might be related to its appearance in activated microglial cells. The complex patterns of the expression of sirtuins in relation to tissue damage should be taken into account when searching for therapies interacting with sirtuins.
Publisher
Springer US,Springer Nature B.V
Subject
/ Aged
/ Alzheimer Disease - genetics
/ Alzheimer Disease - metabolism
/ Alzheimer Disease - pathology
/ Amyloid beta-Peptides - analysis
/ Biomedical and Life Sciences
/ Entorhinal Cortex - metabolism
/ Entorhinal Cortex - pathology
/ Female
/ Humans
/ Male
/ Nerve Tissue Proteins - biosynthesis
/ Nerve Tissue Proteins - genetics
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