Cited by 279Dementia and Cognitive Impairment ResearchAdvanced Neuroimaging Techniques and ApplicationsAlzheimer's disease research and treatments

White matter pathology isolates the hippocampal formation in Alzheimer's disease

Open access
Salat, D.H., Tuch, D.S., van der Kouwe, A.J.W., Greve, D.N., Pappu, V., Lee, S.Y., Hevelone, N.D., Zaleta, A.K. +4 more·2010·Neurobiology of Aging

Abstract

Prior work has demonstrated that the memory dysfunction of Alzheimer's disease (AD) is accompanied by marked cortical pathology in medial temporal lobe (MTL) gray matter. In contrast, changes in white matter (WM) of pathways associated with the MTL have rarely been studied. We used diffusion tensor imaging (DTI) to examine regional patterns of WM tissue changes in individuals with AD. Alterations of diffusion properties with AD were found in several regions including parahippocampal WM, and in regions with direct and secondary connections to the MTL. A portion of the changes measured, including effects in the parahippocampal WM, were independent of gray matter degeneration as measured by hippocampal volume. Examination of regional changes in unique diffusion parameters including anisotropy and axial and radial diffusivity demonstrated distinct zones of alterations, potentially stemming from differences in underlying pathology, with a potential myelin specific pathology in the parahippocampal WM. These results demonstrate that deterioration of neocortical connections to the hippocampal formation results in part from the degeneration of critical MTL and associated fiber pathways.

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Crossref · 10.1016/j.neurobiolaging.2008.03.013

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  • Effects of tauopathy on DTI metrics in grey and white matter are complex and may involve axonal damage, myelin injury, neuronal degeneration, and gliosis, which all have been found in tauopathies.

    “Effects of tauopathy on DTI metrics in the grey and white matter are complex and may involve axonal damage, myelin injury, neuronal degeneration, and gliosis, which all have been found in tauopathies [17,18,23,25,28,29,33,38,57].”

    From Diffusion tensor imaging reveals whole-brain microstructural changes in the P301L mouse model of tauopathy. (2020) · cites this paper as [17]

    The Discussion (page unavailable) says the basis of DTI changes is uncertain and identifies possible contributions from axonal and myelin degeneration, oligodendrocyte loss, reactive astrocytosis, and reduced neuropil density in Alzheimer’s disease. The Introduction also describes neuronal loss in Alzheimer’s disease. However, this paper studies DTI changes in white matter; it does not establish the claimed effects on grey-matter DTI metrics or across tauopathies generally. (LLM, conf=0.85)

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Research works printed but not linked: 3

  1. [39]Jones DK Horsfield MA Simmons A Optimal strategies for measuring diffusion in anisotropic systems by magnetic resonance imaging Magn Reson Med 1999 42 3 515 525 10467296
  2. [46]Mintun MA Larossa GN Sheline YI Dence CS Lee SY Mach RH Klunk WE Mathis CA DeKosky ST Morris JC [11C]PIB in a nondemented population: potential antecedent marker of Alzheimer disease Neurology 2006 67 3 446 452 16894106
  3. [55]Pfefferbaum A Sullivan EV Hedehus M Lim KO Adalsteinsson E Moseley M Age-related decline in brain white matter anisotropy measured with spatially corrected echo-planar diffusion tensor imaging Magn Reson Med 2000 44 2 259 268 10918325

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Authors
Salat, D. H., Tuch, D. S., van der Kouwe, A. J. W., Greve, D. N., Pappu, V., Lee, S. Y., Hevelone, N. D., Zaleta, A. K., Growdon, J. H., Corkin, S., Fischl, B., & Rosas, H. D.
Affiliations
Massachusetts General Hospital (US)
Corresponding author
Salat, D.H.
Venue
Neurobiology of Aging
Publisher
Elsevier BV
Published
2010-02
Volume
31
Issue
2
Pages
244-256
ISSN
0197-4580 (ISSN-L)
OpenAlex
W2168247374
Cited by
279
References
92
Citations by year
2026: 2 · 2025: 8 · 2024: 5 · 2023: 10 · 2022: 7 · 2021: 6 · 2020: 13 · 2019: 10 · 2018: 11 · 2017: 14 · 2016: 20 · 2015: 23 · 2014: 17 · 2013: 26 · 2012: 32
FWCI
17.57
Type
journal article
Language
en
Open access
Locations
  • Neurobiology of Aging (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institute on Aging (F32AG005886, K01AG024898, AG 05886)
  • National Institute of Nursing Research (R01NR010827)
  • National Institute of Biomedical Imaging and Bioengineering (U54 EB05149, U54EB005149)
  • National Center for Research Resources (P41-RR-14075, P41RR014075)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Advanced Neuroimaging Techniques and Applications
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
Keywords
Alzheimer's disease, white matter pathology, hippocampal formation, medial temporal lobe, diffusion tensor imaging, fractional anisotropy, axial and radial diffusivity, myelin degeneration, memory impairment, hippocampal volume
MeSH terms
Aged, Alzheimer Disease, Brain, Female, Hippocampus, Humans, Image Processing, Computer-Assisted, Male, Nerve Fibers, Myelinated, Neural Pathways, Organ Size, Anisotropy, Parahippocampal Gyrus, Nerve Fibers, Unmyelinated, Diffusion Tensor Imaging

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