Phospholipid oxidation and carotenoid supplementation in Alzheimer’s disease patients


Alzheimer's disease (AD) is a progressive, neurodegenerative disease, characterised by decline of memory, cognitive function and changes in behaviour. Generic markers of lipid peroxidation are increased in AD, therefore reactive oxygen species have been suggested to be involved in the aetiology of cognitive decline. Carotenoids are depleted in AD serum, therefore we have compared serum lipid oxidation between AD and age-matched control subjects before and after carotenoid supplementation. The novel oxidised phospholipid biomarker 1-palmitoyl-2-(5'-oxo-valeroyl)-sn-glycero-3-phosphocholine (POVPC) was analysed using electrospray ionization tandem mass spectrometry (MS) with multiple reaction monitoring (MRM), 8-isoprostane (IsoP) was measured by ELISA and ferric reducing antioxidant potential (FRAP) was measured by a colorimetric assay. AD patients (n=21) and healthy age-matched control subjects (n=16) were supplemented with either Macushield™ (10 mg meso-zeaxanthin, 10 mg lutein, 2 mg zeaxanthin) or placebo (sunflower oil) for six months. The MRM-MS method determined serum POVPC sensitively (from 10 µl serum) and reproducibly (CV=7.9%). At baseline, AD subjects had higher serum POVPC compared to age-matched controls, (p=0.017) and cognitive function was correlated inversely with POVPC (r=−0.37; p=0.04). After six months of carotenoid intervention, serum POVPC was not different in AD patients compared to healthy controls. However, POVPC was significantly higher in control subjects after six months of carotenoid intervention compared to their baseline (p=0.03). Serum IsoP concentration was unrelated to disease or supplementation. Serum FRAP was significantly lower in AD than healthy controls but was unchanged by carotenoid intervention (p=0.003). In conclusion, serum POVPC is higher in AD patients compared to control subjects, is not reduced by carotenoid supplementation and correlates with cognitive function.

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Divisions: College of Health & Life Sciences
College of Health & Life Sciences > Chronic and Communicable Conditions
College of Health & Life Sciences > School of Psychology
College of Health & Life Sciences > School of Biosciences > Cell & Tissue Biomedical Research
Additional Information: © 2017, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Funding: BBSRC; Kidney Research Foundation; ARUK; Howard Foundation; and Aston Research Centre for Healthy Ageing
Uncontrolled Keywords: oxidative stress,lipid peroxidation,POVPC,mass spectrometry,lutein,meso-zeaxanthin,zeaxanthin,cognitive function,supplementation
Publication ISSN: 1873-4596
Last Modified: 12 Jun 2024 07:14
Date Deposited: 15 Mar 2017 16:45
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2017-07
Published Online Date: 2017-03-14
Accepted Date: 2017-03-11
Submitted Date: 2016-09-02
Authors: Ademowo, O.S. (ORCID Profile 0000-0003-0232-1935)
Dias, H.K.I. (ORCID Profile 0000-0002-6620-8221)
Milic, I. (ORCID Profile 0000-0001-7531-7561)
Devitt, A. (ORCID Profile 0000-0002-4651-6761)
Moran, R.
Mulcahy, R.
Howard, A.N.
Nolan, J.M.
Griffiths, H.R.

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