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@ARTICLE{Harrison:141600,
author = {Harrison, Theresa M and Maaß, Anne and Adams, Jenna N and
Du, Richard and Baker, Suzanne L and Jagust, William J},
title = {{T}au deposition is associated with functional isolation of
the hippocampus in aging.},
journal = {Nature Communications},
volume = {10},
number = {1},
issn = {2041-1723},
address = {[London]},
publisher = {Nature Publishing Group UK},
reportid = {DZNE-2020-07924},
pages = {4900},
year = {2019},
abstract = {The tau protein aggregates in aging and Alzheimer disease
and may lead to memory loss through disruption of medial
temporal lobe (MTL)-dependent memory systems. Here, we
investigated tau-mediated mechanisms of hippocampal
dysfunction that underlie the expression of episodic memory
decline using fMRI measures of hippocampal local coherence
(regional homogeneity; ReHo), distant functional
connectivity and tau-PET. We show that age and tau pathology
are related to higher hippocampal ReHo. Functional
disconnection between the hippocampus and other components
of the MTL memory system, particularly an anterior-temporal
network specialized for object memory, is also associated
with higher hippocampal ReHo and greater tau burden in
anterior-temporal regions. These associations are not
observed in the posteromedial network, specialized for
context/spatial information. Higher hippocampal ReHo
predicts worse memory performance. These findings suggest
that tau pathology plays a role in disconnecting the
hippocampus from specific MTL memory systems leading to
increased local coherence and memory decline.},
keywords = {Adult / Aged / Aged, 80 and over / Aging: metabolism /
Aging: physiology / Aging: psychology / Alzheimer Disease:
diagnostic imaging / Alzheimer Disease: metabolism /
Alzheimer Disease: physiopathology / Alzheimer Disease:
psychology / Amyloid beta-Peptides: metabolism / Aniline
Compounds / Brain: diagnostic imaging / Brain: metabolism /
Brain: physiopathology / Carbolines / Cognitive Aging:
physiology / Cognitive Aging: psychology / Contrast Media /
Entorhinal Cortex: diagnostic imaging / Entorhinal Cortex:
metabolism / Entorhinal Cortex: physiopathology / Executive
Function / Female / Functional Neuroimaging / Hippocampus:
diagnostic imaging / Hippocampus: metabolism / Hippocampus:
physiopathology / Humans / Male / Memory, Episodic / Memory,
Short-Term / Middle Aged / Neural Pathways: diagnostic
imaging / Neural Pathways: metabolism / Neural Pathways:
physiopathology / Neurofibrillary Tangles: metabolism /
Positron-Emission Tomography / Temporal Lobe: diagnostic
imaging / Temporal Lobe: metabolism / Temporal Lobe:
physiology / Thiazoles / Young Adult / tau Proteins:
metabolism /
2-(4'-(methylamino)phenyl)-6-hydroxybenzothiazole (NLM
Chemicals) / Amyloid beta-Peptides (NLM Chemicals) / Aniline
Compounds (NLM Chemicals) / Carbolines (NLM Chemicals) /
Contrast Media (NLM Chemicals) / MAPT protein, human (NLM
Chemicals) / Thiazoles (NLM Chemicals) / tau Proteins (NLM
Chemicals) / 7-(6-fluoropyridin-3-yl)-5H-pyrido(4,3-b)indole
(NLM Chemicals)},
cin = {AG Düzel},
ddc = {500},
cid = {I:(DE-2719)5000006},
pnm = {344 - Clinical and Health Care Research (POF3-344)},
pid = {G:(DE-HGF)POF3-344},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:31653847},
pmc = {pmc:PMC6814780},
doi = {10.1038/s41467-019-12921-z},
url = {https://pub.dzne.de/record/141600},
}