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Cortical tau deposition follows patterns of entorhinal functional connectivity in aging

Journal Article · · eLife
DOI:https://doi.org/10.7554/eLife.49132· OSTI ID:1572050
 [1];  [2];  [1];  [3];  [4]
  1. Univ. of California, Berkeley, CA (United States). Helen Wills Neuroscience Inst.
  2. Univ. of California, Berkeley, CA (United States). Helen Wills Neuroscience Inst.; German Center for Neurodegenerative Disease, Magdeburg (Germany)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  4. Univ. of California, Berkeley, CA (United States). Helen Wills Neuroscience Inst.; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Tau pathology first appears in the transentorhinal and anterolateral entorhinal cortex (alEC) in the aging brain. The transition to Alzheimer’s disease (AD) is hypothesized to involve amyloid-β (Aβ) facilitated tau spread through neural connections. We contrasted functional connectivity (FC) of alEC and posteromedial EC (pmEC), subregions of EC that differ in functional specialization and cortical connectivity, with the hypothesis that alEC-connected cortex would show greater tau deposition than pmEC-connected cortex. We used resting state fMRI to measure FC, and PET to measure tau and Aβ in cognitively normal older adults. Tau preferentially deposited in alEC-connected cortex compared to pmEC-connected or non-connected cortex, and stronger connectivity was associated with increased tau deposition. FC-tau relationships were present regardless of Aβ, although strengthened with Aβ. These results provide an explanation for the anatomic specificity of neocortical tau deposition in the aging brain and reveal relationships between normal aging and the evolution of AD.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC); National Institutes of Health (NIH); Helmholtz-Gemeinschaft; Tau Consortium
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1572050
Journal Information:
eLife, Journal Name: eLife Vol. 8; ISSN 2050-084X
Publisher:
eLife Sciences Publications, Ltd.Copyright Statement
Country of Publication:
United States
Language:
English

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