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Inhibitory effects of apple pectin on experimental hepatic metastasis and portal free radical

Research Project

Project/Area Number 10671106
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field General surgery
Research InstitutionToyama Medical and Pharmaceutical University

Principal Investigator

TAZAWA Kenji  Faculty of Medicine, Toyama Medical and Pharmaceutical University Professor, 医学部, 教授 (80018887)

Co-Investigator(Kenkyū-buntansha) TAKEMORI Shigeru  Hospital, Toyama Medical and Pharmaceutical University Assistant Professor, 附属病院, 講師 (30227061)
前田 正敏  富山医科薬科大学, 医学部, 教務職員 (30143861)
Project Period (FY) 1998 – 1999
Project Status Completed (Fiscal Year 1999)
Budget Amount *help
¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 1999: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1998: ¥2,200,000 (Direct Cost: ¥2,200,000)
KeywordsApple pectin / superoxide anion / hydroxyl radical / oligosaccharide / Fenton reaction / Azoxymethane / dietary fiber / free radical / フリーラジカル
Research Abstract

Among the various kinds of pectin, apple pectin exerts a bacteriostatic action and therefore may change the composition of the intestinal flora. We examined here, the inhibitory effects of apple pectin in colon carcinogenesis using water-soluble methoxylated pectin from apples. Supplementation of the diet with 20% apple pectin significantly decreased the number and incidence of Azoxymethane-induced colonic tumors. Prostaglandin E2 levels in distal colonic mucosa or portal blood from 20% apple pectin fed rats were lower than those in basal diet fed rats. Furthermore, 20 % apple pectin fed rats demonstrated a significantly reduced incidence of experimental portal bacteremia induced by methotrexate. The incidence of hepatic metastasis was significantly reduced with a 20% apple pectin diet.
We investigated the action of apple pectin on anticarcinogenesis focusing on the antioxidant activity evaluated by an electron spin trapping technique (ESR) in which the superoxide anion radicals and hyd … More roxyl radicals were generated by hypoxanthin-xanthin oxidase (HPX-XOD) and ferrous sulfate-hydrogen peroxide (Fenton reaction systems), respectively. Apple pectin is a partially methoxylated polymer of galacturonic acid obtained from apple. In the apple pectic oligosaccharide-containing assay system, trapping-signals for both radicals became significantly lower compared with phosphate buffered saline-containing one, indicating that apple pectic oligosaccharide actually exhibited scavenging activity. When apple pectic oligosaccharide was divided into five fractions based on the degree of polymerization, a fraction with a lower polymerization (pos-S) showed a stronger scavenging activity than those with a higher one. Moreover, this activity was enhanced after heating of pos-S (121℃ for 30min ).
In conclusion, apple pectin may exert an antitumor effect and prevent cancer metastasis and portal bacteremia by modifying the hosts immune function and/or by altering the intestinal flora. Dietary fibers such as pectin have an important function in the intestinal tract as anti-inflammatory materials. The effect of apple pectin supplementation on anti-metastatic action was evaluated. Pectic oligosaccharides with small molecular weights showed highly inhibitory effects on HPX-XOD and Fenton reaction systems. The scavenging activity of pectic oligosaccharide was suitable and accelerated at high temperatures. Apple pectin has a scavenger effect in the intestinal digestion and portal circulation system as an anti-inflammatory food. Dietary fibers like pectin have very important function in intestinal tract as ant-inflammatory foods. Less

Report

(3 results)
  • 1999 Annual Research Report   Final Research Report Summary
  • 1998 Annual Research Report
  • Research Products

    (29 results)

All Other

All Publications (29 results)

  • [Publications] 田澤賢次、他: "アップルペクチンの大腸癌発生抑制―ペクチンから抽出されたオリゴ糖の活性酸素抑制について"Biotherapy. 13. 510-512 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 田澤賢次、他: "食物繊維と腸内フローラ―大腸癌を中心にして"栄養評価と治療. 16. 379-384 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 半明敬子、田澤賢次、他: "アップルペクチン由来オリゴ糖の活性酸素抑制に関する研究"富山医科薬科大学看護学会誌. 2. 7-16 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 田澤 賢次: "玄米発酵食品の活性酸素消去活性"Food Style 21. III. 32-37 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] M. Ohsugi, K. Tazawa, et al: "Active -oxygen scavenging activity of traditional nourishing - tonic herbal medicines and active constituents of Rhodiola sacra"Journal of Ethonopharmacology. 67. 111-119 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 田澤 賢次: "食品成分と癌の制御"東方医学. 15. 23-31 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 田澤 賢次: "新しい癌免疫化学療法の指診―QOLを重視した癌薬物療法"医薬ジャーナル社. 7(66-71) (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 田澤 賢次: "平成10年度青森県地場産業技術研究開発費補助事業報告書"青森県オリゴ糖利用研究開発協同組合. 8(40-47) (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Tazawa K. et al: "Inhibitory effects of dietary foods on colon carcinogenesis-evaluation of the radical scavenging activity of pectic oligosaccharide"Biotherapy. 13. 510-512 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Tazawa K. et al: "Inhibitory effects of dietary fiber on colon carcinogenesis and intestinal flora"Japanese Journal of Nutritional Assesment. 16. 379-384 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Tazawa K.: "Inhibitory effects of dietary foods on colon carcinogenesis and cancer control"Eastern Medicine. 15 (4). 23-32 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Hanmyou K., Tazawa K. et al: "The radical scavenging activity of pectic oligosaccharide from apple pectin evaluated by electron spin resonance (ESR)"J. of the Nursing Society of the Toyama Med. & Pharma. University. 2. 7-16 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Tazawa K. et al: "Evaluation of the radical scavenging activity of rice bran and rice bran fermented by Aspergillus"J. of Food Styl 21. 3 (9). 32-37 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Ohsugi M., Tazawa K. et al: "Active-oxygen scavenging activity of traditional nourishing-tonic herbal medicines and active constituents of Rhodiola sacra."Jounal of Ethnopharmacology. 67. 111-119 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 田澤賢次他: "アップルペクチンの大腸癌発生抑制-ペクチンから抽出されたオリゴ糖の活性酸素抑制について"Biotherapy. 13. 510-512 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 田澤賢次他: "食物繊維と腸内フローラ-大腸癌を中心にして"栄養評価と治療. 16. 379-384 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 半明敬子,田澤賢次他: "アップルペクチン由来オリゴ糖の活性酸素抑制に関する研究"富山医科薬科大学看護学会誌. 2. 7-16 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 田澤賢次: "玄米発酵食品の活性酸素消去活性"Food Style 21. III. 32-37 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] M.Ohsugi,K.Tazawa.et al: "Active-oxygen scavenging activity of traditional nourishing-tonic herbal medicines and active constituents of Rhodiola sacra"Journal of Ethnopharmacology. 67. 111-119 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 田澤賢次: "食品成分と癌の制御"東方医学. 15. 23-31 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 田澤賢次: "新しい癌免疫化学療法の指診-QOLを重視した癌薬物療法"医薬ジャーナル社. 7(66〜71) (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 田澤賢次: "平成10年度青森県地場産業技術研究開発費補助事業報告書"青森県オリゴ糖利用研究開発協同組合. 8(40〜47) (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 田澤賢次: "アップルペクチンの大腸癌発生抑制-特に,エステル化度と活性酸素抑制からの検討-" 消化器癌の発生と進展. 10. 141-144 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 田澤賢次: "アップルペクチンの大腸癌発生抑制-ペクチンから抽出されたオリゴ糖の活性酸素抑制について" Biotherapy. 13(in print). (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] 田澤賢次: "食品成分による大腸癌の予防" 日本外科学会誌. 99(6). 368-372 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 田澤賢次: "食品成分による大腸癌発生予防と肝転移制御" 富山医科薬科大学医学会誌. 11(1). 50-55 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 田澤賢次: "食物繊維の腸管内での作用と発癌との関連" PRACTICAL ONCOLOGY. 15-17 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 田澤賢次: "自然順応型の食生活のあり方" キチン・キトサン協会誌. 44. 15-18 (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] TAZAWA KENJI: "Functional Foods for Disease Prevention I" Anticareinogenir and/or antimetastatieaction of apple pectine in experinental nat colon carcineger usis and on hepatic metastasis nat model, 96-103 (1998)

    • Related Report
      1998 Annual Research Report

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Published: 1998-04-01   Modified: 2016-04-21  

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