Dried blood spot (DBS) sample collection for determination of the oxidative stress biomarker 8-epi-PGF(2α) in humans using liquid chromatography/tandem mass spectrometry

Rapid Communications in Mass Spectrometry : RCM
Nasser E BastaniRune Blomhoff

Abstract

F2-isoprostanes are a series of prostaglandin F2-like compounds that are formed by free-radical-catalyzed peroxidation of arachidonic acid (ARA). Several F2-isoprostanes, but in particular 8-epi-PGF(2α), are widely used as oxidative stress biomarkers. In this study we have developed an analytical tool for finger-tip blood sampling and analysis of 8-epi-PGF(2α) from dried blood spots (DBS). We have applied solid-phase extraction (SPE) and liquid chromatography/tandem mass spectrometry (LC/MS/MS) for the extraction, separation and detection of 8-epi-PGF(2α) in DBS and have studied the stability of this marker using the DBS collection platform. The mass limit of detection (mLOD) for 8-epi-PGF(2α) extracted from DBS samples was 1.5 pg while the concentration limit of detection (cLOD) and concentration limit of quantitation (cLOQ) were 6 pg/mL and 18 pg/mL, respectively. All values based on triplicate analysis. Sufficient stability of 8-epi-PGF(2α) in DBS was achieved by preconditioning DBS paper with vitamin E and BHT. The developed method is sensitive, specific, robust, efficient, and can accurately measure endogenous concentrations of 8-epi-PGF(2α) in DBS. Thus, it offers an analytical approach to measure 8-epi-PGF(2α) by a novel...Continue Reading

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Sep 25, 2014·Mass Spectrometry Reviews·Michel WagnerGérard Hopfgartner
Mar 15, 2015·Journal of Pharmaceutical and Biomedical Analysis·Kie KasugaNariyasu Mano
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