title: Plasma/Serum Plasmalogens: Methods of Analysis and Clinical Significance.
abstract: Age-related diseases, such as atherosclerosis and dementia, are associated with oxidative stress and chronic inflammation. Peroxisome dysfunction may be related to aging and age-related pathologies, possibly through the derangement of redox homeostasis. The biosyntheses of plasmalogens (Pls), a subclass of glycerophospholipids, are primarily regulated by peroxisomes. Thus, plasma Pls may reflect the systemic functional activity of peroxisomes and serve as potential biomarkers for diseases related to oxidative stress and aging. Recently, we have established three promising analytical methods for plasma/serum Pls using high-performance liquid chromatography with radioactive iodine, liquid chromatography-tandem mass spectrometry, and enzymatic assay. These methods were validated and used to obtain detailed molecular information regarding these molecules. In cross-sectional studies on asymptomatic, coronary artery disease, and elderly dementia individuals, we found that serum choline Pls, particularly those containing oleic and linoleic acid in the sn-2 position of the glycerol backbone, may serve as reliable antiatherogenic biomarkers. Furthermore, we also found that serum ethanolamine Pls were effective in discriminating cognitive impairment. These results support our hypothesis and further studies are clearly needed to elucidate Pls pathophysiologic significance.
authors.affiliation: Department of Biochemistry, Teikyo University School of Medicine, Itabashi-ku, Tokyo, Japan. Electronic address: maeba@med.teikyo-u.ac.jp.
authors.forename: Ryouta
authors.initials: R
authors.lastname: Maeba
authors.affiliation: Department of Animal Science, Iwate University, Morioka, Iwate, Japan; Division of Applied Bioscience, Hokkaido University, Sapporo, Hokkaido, Japan.
authors.forename: Megumi
authors.initials: M
authors.lastname: Nishimukai
authors.affiliation: Asahi Kasei Pharma Corporation, Shizuoka, Japan.
authors.forename: Shin-ichi
authors.initials: S
authors.lastname: Sakasegawa
authors.affiliation: Department of Symbiotic Systems Science and Technology, Graduate School of Symbiotic Systems Science and Technology, Fukushima University, Fukushima, Japan.
authors.forename: Daisuke
authors.initials: D
authors.lastname: Sugimori
authors.affiliation: Division of Applied Bioscience, Hokkaido University, Sapporo, Hokkaido, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Hara
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D050197:Atherosclerosis / Q000097:blood*; D002853:Chromatography, Liquid / Q000379:methods; D003324:Coronary Artery Disease / Q000097:blood*; D003704:Dementia / Q000097:blood*; D005260:Female; D006801:Humans; D008297:Male; D013058:Mass Spectrometry / Q000379:methods; D008875:Middle Aged; D010955:Plasmalogens / Q000032:analysis / Q000097:blood*; D055815:Young Adult
chemical_list: D010955:Plasmalogens
keywords: Atherosclerosis; Biomarker; Coronary artery disease; Dementia; Ether glycerophospholipid; Liquid chromatography-tandem mass spectrometry; Peroxisome; Plasmalogen