沖縄産カンショ茎葉のカフェ酸誘導体含量と抗LDL酸化作用  [in Japanese] Characteristics of Caffeic Acid Derivatives in Okinawan Sweet Potato (Ipomoea batatas L.) Leaves and the Anti-LDL Oxidation Activity  [in Japanese]

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Author(s)

    • 平良 淳誠 TAIRA Junsei
    • 国立沖縄工業高等専門学校生物資源工学科 Okinawa National College of Technology, Department of Bioresource Technology
    • 大嶺 和可奈 OHMINE Wakana
    • 国立沖縄工業高等専門学校生物資源工学科 Okinawa National College of Technology, Department of Bioresource Technology

Abstract

カンショ茎葉に含まれる機能性ポリフェノールのカフェ酸誘導体のcaffeic acid (CA), chlorogenic acid (ChA), 4,5-di-caffeoylquinic acid (4,5-diCQA), 3,5-diCQA, 3,4-diCQAおよび3,4,5-triCQAについて,沖縄在来系統由来の9品種と比較品種系統の2品種の計11品種で定量した.各品種の総カフェ酸誘導体の含量とポリフェノール含量は相関し(<I>r</I>=0.94),主要なポリフェノールであることが示された.特にカフェオイルキナ酸誘導体の4,5-diCQAと3,5-diCQAは全ての品種の主成分であった.品種別では,‘コガネユタカ’, ‘春コガネ’および‘名護マサリ’の含量が顕著に高かった.またカフェ酸誘導体がLDL酸化の抑制に寄与していることが示唆され,初期の動脈硬化症の予防食素材になることが期待された.本研究から沖縄産カンショ茎葉が機能性食品素材として有用品種になることが示された.

The constituents of functional polyphenols, such as caffeic acid (CA), chlorogenic acid (ChA), 4,5-di-caffeoylquinic acid (4,5-diCQA), 3,5-diCQA, 3,4-diCQA and 3,4,5-triCQA, in 9 cultivars of Okinawan sweet potato leaves (<I>Ipomoea batatas</I> L.) and two comparable sweet potato cultivars were examined. The total amounts of caffeic acid derivatives correlated with the polyphenol contents (<I>r</I>=0.94), and were the main polyphenol constituents of sweet potato leaf. 4,5-diCQA and 3,5-diCQA were the main components in all cultivars, and were higher in <I>harukogane, koganeyutaka</I> and <I>nagomasari</I> than in the other cultivars. The inhibition of LDL-oxidation of the sweet potato leaf extracts was correlated with the total amounts of caffeic acid derivatives, suggesting that sweet potato leaves may prevent atherosclerosis via reducing early atherogenesis. This study demonstrated that Okinawan sweet potato leaves have potential as a functional food.

Journal

  • Nippon Shokuhin Kagaku Kogaku Kaishi

    Nippon Shokuhin Kagaku Kogaku Kaishi 58(1), 16-20, 2011-01-15

    Japanese Society for Food Science and Technology

References:  15

Cited by:  1

Codes

  • NII Article ID (NAID)
    10027703100
  • NII NACSIS-CAT ID (NCID)
    AN10467499
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    1341027X
  • NDL Article ID
    10934815
  • NDL Source Classification
    ZP34(科学技術--食品工学・工業)
  • NDL Call No.
    Z17-126
  • Data Source
    CJP  CJPref  NDL  IR  J-STAGE 
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