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Microstructural changes in the brain mediate the association of AK4, IGFBP5, HSPB2, and ITPK1 with cognitive decline

Journal Article · · Neurobiology of Aging
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  1. Rush Univ. Medical Center, Chicago, IL (United States)
  2. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  3. Columbia Univ. Medical Center, New York, NY (United States); Broad Inst., Cambridge, MA (United States)
  4. Rush Univ. Medical Center, Chicago, IL (United States); Illinois Inst. of Technology, Chicago, IL (United States)
The associations of 4 proteins-AK4, ITPK1, HSPB2, and IGFBP5-with cognitive function in older adults were largely unexplained by known brain pathologies. We examined the extent to which individual protein associations with cognitive decline were attributable to microstructural changes in the brain. This study included 521 participants (mean age 90.3, 65.9-108.3) with the postmortem reciprocal of transverse relaxation time (R2) magnetic resonance image. All participants came from one of the 2 ongoing longitudinal cohorts of aging and dementia, the Religious Orders Study and Rush Memory and Aging Project. Higher abundance of AK4, HSPB2, and IGFBP5 was associated with faster cognitive decline and mediated through lower postmortem R2 in the frontal and temporal white matter regions. In contrast, higher abundance of ITPK1 was associated with slower cognitive decline and mediated through higher postmortem R2 in the frontal and temporal white matter regions. Lastly, the associations of 4 proteins-AK4, ITPK1, IGFBP5, and HSPB2-with cognition in late life were explained via microstructural changes in the brain.
Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
National Institutes of Health (NIH); USDOE
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
1615003
Report Number(s):
PNNL-SA-147569
Journal Information:
Neurobiology of Aging, Journal Name: Neurobiology of Aging Journal Issue: C Vol. 84; ISSN 0197-4580
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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