Article Text

Nutrient intake and brain biomarkers of Alzheimer's disease in at-risk cognitively normal individuals: a cross-sectional neuroimaging pilot study
  1. Lisa Mosconi1,
  2. John Murray1,
  3. Michelle Davies1,
  4. Schantel Williams1,
  5. Elizabeth Pirraglia1,
  6. Nicole Spector1,
  7. Wai H Tsui1,
  8. Yi Li1,
  9. Tracy Butler1,
  10. Ricardo S Osorio1,
  11. Lidia Glodzik1,
  12. Shankar Vallabhajosula2,
  13. Pauline McHugh1,
  14. Charles R Marmar1,3,
  15. Mony J de Leon1
  1. 1Department of Psychiatry, New York University School of Medicine, New York, USA
  2. 2Department of Radiology, Citigroup Biomedical Imaging Center (CBIC), Weill Cornell Medical College, New York, New York, USA
  3. 3Steven and Alexandra Cohen Veterans Center for PTSD and TBI, New York, New York, USA
  1. Correspondence to Dr Lisa Mosconi; lisa.mosconi{at}nyumc.org

Abstract

Objective There is increasing evidence to suggest that diet, one of the most important modifiable environmental factors, may play a role in preventing or delaying cognitive decline and Alzheimer's disease (AD). This study examines the relationship between dietary nutrients and brain biomarkers of AD in cognitively normal individuals (NL) with and without AD risk factors.

Design As part of an ongoing brain imaging study, participants received clinical and laboratory examinations, a neurocognitive test battery, positron emission tomography (PET) with 11C-Pittsburgh Compound-B (PiB; a measure of amyloid-β (Aβ) load) and 18F-fluorodeoxyglucose (FDG; a proxy of neuronal activity), and completed semiquantitative food frequency questionnaires.

Setting Research centre affiliated with the Alzheimer's disease Core Center at New York University School of Medicine.

Participants 49 NL individuals (age 25–72 years, 69% women) with dietary information, 11C-PiB and 18F-FDG PET scans were examined.

Results Controlling for age and total caloric intake, higher intake of vitamin B12, vitamin D and ω-3 polyunsaturated fatty acid (PUFA) was associated with lower Aβ load in AD regions on PiB-PET, while higher intake of β-carotene and folate was associated with higher glucose metabolism on FDG-PET. β-carotene and folate were associated with reduced glucose metabolism for women, apolipoprotein E epsilon 4 (APOE4) carriers and participants with positive AD family history, but not for their risk-free counterparts. The associations of vitamin B12, vitamin D and ω-3 PUFA with PiB retention were independent of gender, APOE and family history. The identified nutrient combination was associated with higher intake of vegetables, fruit, whole grains, fish and legumes, and lower intake of high-fat dairies, meat and sweets.

Conclusions Our data provide a potential pathophysiological mechanism for epidemiological findings showing that dietary interventions may play a role in the prevention of AD. Longitudinal studies are needed to determine whether there is a direct link between nutrient intake, brain biomarkers and risk of AD.

  • Nuclear Medicine
  • Nutrition & Dietetics
  • Radiology & Imaging

This is an Open Access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 3.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/3.0/

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