- Title
- Alterations in erythrocyte fatty acid composition in preclinical Alzheimer's disease
- Creator
- Goozee, Kathryn; Chatterjee, Pratishtha; Chung, Roger; Garg, Manohar L.; Martins, Ralph N.; James, Ian; Shen, Kaikai; Sohrabi, Hamid R.; Asih, Prita R.; Dave, Preeti; Ball, Bethany; ManYan, Candice; Taddei, Kevin
- Relation
- Scientific Reports Vol. 7, no. 676
- Publisher Link
- http://dx.doi.org/10.1038/s41598-017-00751-2
- Publisher
- Nature Publishing Group
- Resource Type
- journal article
- Date
- 2017
- Description
- Brain and blood fatty acids (FA) are altered in Alzheimer’s disease and cognitively impaired individuals, however, FA alterations in the preclinical phase, prior to cognitive impairment have not been investigated previously. The current study therefore evaluated erythrocyte FA in cognitively normal elderly participants aged 65–90 years via trans-methylation followed by gas chromatography. The neocortical beta-amyloid load (NAL) measured via positron emission tomography (PET) using ligand 18F-Florbetaben, was employed to categorise participants as low NAL (standard uptake value ratio; SUVR < 1.35, N = 65) and high NAL or preclinical AD (SUVR ≥ 1.35, N = 35) wherein, linear models were employed to compare FA compositions between the two groups. Increased arachidonic acid (AA, p < 0.05) and decreased docosapentaenoic acid (DPA, p < 0.05) were observed in high NAL. To differentiate low from high NAL, the area under the curve (AUC) generated from a ‘base model’ comprising age, gender, APOEε4 and education (AUC = 0.794) was outperformed by base model + AA:DPA (AUC = 0.836). Our findings suggest that specific alterations in erythrocyte FA composition occur very early in the disease pathogenic trajectory, prior to cognitive impairment. As erythrocyte FA levels are reflective of tissue FA, these alterations may provide insight into the pathogenic mechanism(s) of the disease and may highlight potential early diagnostic markers and therapeutic targets.
- Subject
- diagnostic markers; fatty acids; Alzheimer's disease; cognitive impairment
- Identifier
- http://hdl.handle.net/1959.13/1350792
- Identifier
- uon:30612
- Identifier
- ISSN:2045-2322
- Rights
- This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
- Language
- eng
- Full Text
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