Brain amyloid load and its associations with cognition and vascular risk factors in FINGER Study.

Abstract:

OBJECTIVE:To investigate brain amyloid pathology in a dementia-risk population defined as cardiovascular risk factors, aging, and dementia risk (CAIDE) score of at least 6 but with normal cognition and to examine associations between brain amyloid load and cognitive performance and vascular risk factors. METHODS:A subgroup of 48 individuals from the Finnish Geriatric Intervention Study to Prevent Cognitive Impairment and Disability (FINGER) main study participated in brain 11C-Pittsburgh compound B (PiB)-PET imaging, brain MRI, and neuropsychological assessment at the beginning of the study. Lifestyle/vascular risk factors were determined as body mass index, blood pressure, total and low-density lipoprotein cholesterol, and glucose homeostasis model assessment. White matter lesions were visually rated from MRIs by a semiquantitative Fazekas score. RESULTS:Twenty participants (42%) had a positive PiB-PET on visual analysis. The PiB-positive group performed worse in executive functioning tests, included more participants with APOE ε4 allele (50%), and showed slightly better glucose homeostasis compared to PiB-negative participants. PiB-positive and -negative participants did not differ significantly in other cognitive domain scores or other vascular risk factors. There was no significant difference in Fazekas score between the PiB groups. CONCLUSIONS:The high percentage of PiB-positive participants provides evidence of a successful recruitment process of the at-risk population in the main FINGER intervention trial. The results suggest a possible association between early brain amyloid accumulation and decline in executive functions. APOE ε4 was clearly associated with amyloid positivity, but no other risk factor was found to be associated with positive PiB-PET.

journal_name

Neurology

journal_title

Neurology

authors

Kemppainen N,Johansson J,Teuho J,Parkkola R,Joutsa J,Ngandu T,Solomon A,Stephen R,Liu Y,Hänninen T,Paajanen T,Laatikainen T,Soininen H,Jula A,Rokka J,Rissanen E,Vahlberg T,Peltoniemi J,Kivipelto M,Rinne JO

doi

10.1212/WNL.0000000000004827

subject

Has Abstract

pub_date

2018-01-16 00:00:00

pages

e206-e213

issue

3

eissn

0028-3878

issn

1526-632X

pii

WNL.0000000000004827

journal_volume

90

pub_type

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