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Occurrence and distribution of cis-7-icosenoic acid in the lipids of Japanese marine fish, shellfish, and crustaceans

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Title: Occurrence and distribution of cis-7-icosenoic acid in the lipids of Japanese marine fish, shellfish, and crustaceans
Authors: Nakamura, Yutarou Browse this author
Fukuda, Yuuki Browse this author
Shimizu, Kana Browse this author
Ando, Yasuhiro Browse this author →KAKEN DB
Keywords: cis-Icosenoic acid
Fatty acid
Brittle star
Gas chromatography
Issue Date: May-2014
Publisher: 日本水産学会
Journal Title: Fisheries Science
Volume: 80
Issue: 3
Start Page: 613
End Page: 620
Publisher DOI: 10.1007/s12562-014-0740-z
Abstract: This paper reports the concentration and composition of the isomers of cis-icosenoic acid (20:1) in the fatty acids of various species of Japanese marine animals. The main purpose of this study is to reveal the distribution of a positional isomer, cis-7-20:1 (c7-20:1), in marine animals. Because this isomer overlaps with the c9-20:1 isomer in gas chromatography (GC) on the commonly used polar capillary columns, less information is available on its occurrence and distribution. In this study, the monounsaturated fatty acids isolated by argentation thin-layer chromatography were analyzed by GC using a highly polar capillary column, SLB-IL111 (100-m long), with the highest polarity among the commercially available GC columns. A clear separation between the c7- and c9-20:1 isomers enabled the analysis of all the isomers of 20:1 present in marine animals. The results confirmed that the c7 isomer was a minor component of the 20:1 in the pelagic fish, which is rich in the c9 and/or c11 isomers as reported previously. In contrast, the c7 isomer was one of the major isomers in flatfish, shellfish, crabs, and brittle star. In these samples, the c13 isomer also occurred at higher concentrations rather than the c9 isomer. Because such a specific pattern of the 20:1 positional isomers was generally observed in both benthic fish and its dietary animals, the c7 isomer in the benthic fish probably originated from its diet. These marine animals are used as food in Japan, and therefore the c7-20:1 isomer is consumed by humans.
Rights: The original publication is available at
Type: article (author version)
Appears in Collections:水産科学院・水産科学研究院 (Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 安藤 靖浩

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