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Appears in Collections:Aquaculture Journal Articles
Peer Review Status: Refereed
Title: Using a fingertip whole blood sample for rapid fatty acid measurement: Method validation and correlation with erythrocyte polar lipid compositions in UK subjects
Author(s): Bell, J Gordon
Mackinlay, Elizabeth
Dick, James R
Younger, Irene
Lands, Bill
Gilhooly, Thomas
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Keywords: Blood Analysis
Fatty acids Analysis
Issue Date: Nov-2011
Date Deposited: 14-Dec-2012
Citation: Bell JG, Mackinlay E, Dick JR, Younger I, Lands B & Gilhooly T (2011) Using a fingertip whole blood sample for rapid fatty acid measurement: Method validation and correlation with erythrocyte polar lipid compositions in UK subjects. British Journal of Nutrition, 106 (9), pp. 1408-1415.
Abstract: It is well accepted that n-3 long-chain PUFA intake is positively associated with a range of health benefits. However, while benefits have been clearly shown, especially for CVD, the mechanisms for prevention/benefit are less understood. Analysis of plasma and erythrocyte phospholipids (PL) have been used to measure the status of the highly unsaturated fatty acids (HUFA), especially EPA (20 : 5n-3) and DHA (22 : 6n-3), although the time and complexity of the process places limitations on the sample numbers analysed. An assay has been developed using whole blood, collected by finger prick, and stored on absorbant paper, subjected to direct methylation and fatty acids quantified by automated GC. Tests on fatty acid stability show that blood samples are stable when stored at - 20°C for 1 month although some loss of HUFA was seen at 4°C. A total of fifty-one patients, including twenty-seven who consumed no fatty acid supplements, provided a blood sample for analysis. Concentrations of all major fatty acids were measured in erythrocyte PL and whole blood. The major HUFA, including EPA, DHA and arachidonic acid (ARA; 20 : 4n-6), as well as the ARA:EPA ratio and the percentage n-3 HUFA/total HUFA all showed good correlations, between erythrocyte PL and whole blood. Values of r2 ranged from 0·48 for ARA to 0·95 for the percentage of n-3 HUFA/total HUFA. This assay provides a non-invasive, rapid and reliable method of HUFA quantification with the percentage of n-3 HUFA value providing a potential blood biomarker for large-scale nutritional trials.
DOI Link: 10.1017/S0007114511001978
Rights: Publisher policy allows this work to be made available in this repository. Published in British Journal of Nutrition, Volume 106, Issue 09, November 2011, pp 1408-1415 copyright Cambridge University Press. The original publication is available at DOI:

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