Journal Article Mass Spectrometric Quantification of Amphipathic, Polyphenolic Antioxidant of the Pacific Oyster (Crassostrea Gigas)

OKABE, Hiroaki  ,  HUI, Shu-Ping  ,  FUDA, Hirotoshi  ,  FURUKAWA, Takayuki  ,  TAKEDA, Seiji  ,  SHRESTHA, Rojeet  ,  MIURA, Yusuke  ,  WATANABE, Mitsugu  ,  CHIBA, Hitoshi

31 ( 12 )  , pp.1341 - 1344 , 2015-12 , 日本分析化学会(Japan Society for Analytical Chemistry)
A novel amphipathic phenolic compound, 3,5-dihydroxy-4-methoxybenzyl alcohol (DHMBA), that can be isolated from the Pacific oyster (Crassostrea gigas) has been found to protect human hepatocytes against oxidative stress. This study aims to establish a method for the measurement of DHMBA for industrial application. Liquid chromatography-tandem mass spectrometry using deuterated DHMBA as an internal standard and a polar end-capped ODS (Hypersil GOLD aQ) as the solid phase was validated. The limit of detection was 0.04 pmol (S/N = 5), and the limit of quantitation was 0.1 pmol (S/N = 10). The calibration curve was linear throughout the range of 0.1 - 16 pmol (r(2) = 0.9995). This method successfully quantified DHMBA in oysters from 11 sea areas in Japan. The results showed that the yield of DHMBA was variable from 9.8 to 58.8 μg g(-1) whole oyster meat wet weight but not affected by the seawater temperature. The proposed LC-MS/MS method is useful in quantitative studies for DHMBA and potentially for other amphipathic substances.

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