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新規消化管ホルモン,グレリンの分泌調節機構の検討

Research Project

Project/Area Number 15790360
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeSingle-year Grants
Research Field Gastroenterology
Research InstitutionKeio University

Principal Investigator

正岡 建洋  慶應義塾大学, 医学部, 助手 (00317132)

Project Period (FY) 2003 – 2004
Project Status Completed (Fiscal Year 2004)
Budget Amount *help
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2004: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 2003: ¥2,400,000 (Direct Cost: ¥2,400,000)
Keywordsグレリン / ペプシノーゲン / Helicobacter pylori / 慢性萎縮性胃炎 / 除菌療法 / アセチルコリン / ヒスタミン / 一酸化窒素 / 糖尿病 / インスリン / ストレプトゾトシン / プレプログレリン / ミエロペルオキシダーゼ / 胃粘膜
Research Abstract

動物モデルを用いたグレリン分泌機構の検討
ムスカリン受容体タイプ3(M_3)欠損マウスでは、血漿グレリン濃度に有意な変化を認めないものの、胃粘膜中グレリン濃度が有意に上昇していた。また、2型ヒスタミン受容体(H_2)欠損マウスでは、血漿グレリン濃度に有意に上昇し、胃粘膜中グレリン濃度が有意に低下していた。一酸化窒素(NO)合成阻害薬であるL-NAMEをラットに1週間投与したところ、血漿グレリン濃度が有意に上昇した。以上より、グレリンの分泌調節に迷走神経や末梢のNO産生神経が密接に関与し、グレリンが脳腸相関のキーファクターとなり得る可能性が示唆された。
慢性胃炎患者におけるグレリン動態の検討
国立循環器病センターの寒川らとの共同研究により確立した高感度のRadioimmunoassayを用いて69名の慢性胃炎の患者に対し,内視鏡施行時に血漿グレリン濃度,血清ペプシノーゲンI,II濃度を測定したところ、H.pylori除菌前群と除菌後群の2群間は血漿中グレリン濃度に有意な差を認めなかった。特にH.pylori除菌後群において内視鏡的に胃体部まで萎縮が進行している群(open type atrophy群)ではそうでない群(closed type atrophy群)と比較して、有意に、血漿グレリン濃度が低値であった。また、血漿グレリン濃度は血清ペプシノーゲンI濃度、ペプシノーゲンI/II比と有意な相関を示した。
(Suzuki H, Masaoka T et al. Hepatogastroenterol. 51:1249-1254,2004.)
また、高度萎縮性胃炎の一症例についてH.pylori除菌後の2年間にわたって血漿グレリン濃度を詳細に追跡したところ、著明な変動を認めなかった。
(Masaoka T et al. Hepatogastroenterol. 52:1-4,2005.)
以上より、血漿中グレリン濃度が安定した萎縮性胃炎のマーカーとなりうる可能性が示唆された。

Report

(2 results)
  • 2004 Annual Research Report
  • 2003 Annual Research Report
  • Research Products

    (18 results)

All 2005 2004 Other

All Journal Article (10 results) Book (2 results) Publications (6 results)

  • [Journal Article] Long-term strict monitoring of plasma ghrelin and other serological markers of gastric diseases after Helicobacter pylori eradication2005

    • Author(s)
      Masaoka, T., Suzuki, H., Imaeda, H.et al.
    • Journal Title

      Hepatogastroenterology 52(1)

      Pages: 1-4

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Effect of dietary anti-urease immunoglobulin Y on Helicobacter pylori infection in Mongolian Gerbils.2005

    • Author(s)
      Nomura, S., Suzuki, H., Masaoka, T.et al.
    • Journal Title

      Helicobacter 10(1)

      Pages: 43-52

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Second-line treatment of Helicobacter pylori infection after dilution agar methods and PCR-RFLP analysis2004

    • Author(s)
      Masaoka, T., Suzuki, H., et al.
    • Journal Title

      Alimentary Pharmacology and Therapeutics 20 Suppl 1

      Pages: 68-73

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Usefulness of proton pump inhibitor (PPI) maintenance therapy for patients with H.pylori-negative recurrent peptic ulcer after eradication therapy for H.pylori: Pathophysiological characteristics of H.pylori-negative ulcer scars and beyond acid suppression by PPI2004

    • Author(s)
      Ohara, T., Suzuki, H., Masaoka T.et al.
    • Journal Title

      Hepatogastroenterology 51(56)

      Pages: 338-342

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Helicobacter pylori-eradication treatment modulates epithelial cell proliferation and tissue content of hepatocyte growth factor in the gastric mucosa.2004

    • Author(s)
      Suzuki, M., Suzuki, H., Masaoka, T.et al.
    • Journal Title

      Alimentary Pharmacology Therapeutics 20 Suppl 1

      Pages: 158-164

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Effect of dietary anti-Helicobacter pylori-urease immunoglobulin Y on Helicobacter pylori infection2004

    • Author(s)
      Suzuki, H., Nomura, S., Masaoka, T.et al.
    • Journal Title

      Alimentary Pharmacology and Therapeutics 20 Suppl 1

      Pages: 185-192

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Plasma ghrelin concentration correlates with the levels of serum pepsinogen I and Pepsinogen I/II ratio - a possible novel and non-invasive marker for gastric atrophy -.2004

    • Author(s)
      Suzuki, H., Masaoka, T., et al.
    • Journal Title

      Hepatogastroenterology 51(59)

      Pages: 1249-1254

    • Related Report
      2004 Annual Research Report
  • [Journal Article] A case of autoimmune pancreatitis with pseudocysts2004

    • Author(s)
      Nishimura, T., Masaoka, T., Suzuki, H.et al.
    • Journal Title

      Journal of Gastroenterology 39(10)

      Pages: 1005-1010

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Pathophysiological role of human beta-defensins 2 in gastric mucosa.2004

    • Author(s)
      Ohara, T., Morishita, T., Suzuki, H., Masaoka, T., et al.
    • Journal Title

      International Journal of Molecular Medicine 14(6)

      Pages: 1023-1027

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Antibiotics directly induce apoptosis in B cell lymphoma cells derived from BALB/c mice.2004

    • Author(s)
      Ohara, T., Morishita, T., Suzuki, H., Masaoka, T., et al.
    • Journal Title

      Anticancer Research 24(6)

      Pages: 3723-3730

    • Related Report
      2004 Annual Research Report
  • [Book] Microcirculation annual 20042004

    • Author(s)
      Ohara, T., Morishita, T., Suzuki, H., Masaoka, T.et al.
    • Publisher
      Asano, M., Yamamoto, T.
    • Related Report
      2004 Annual Research Report
  • [Book] Organ Microcirculation: Keio International Symposia for Life Sciences and Medicine, Vol.132004

    • Author(s)
      Suzuki, H., Masaoka, T.et al.
    • Publisher
      Ishii, H., Suematsu, M., Tanishita, K., Suzuki, H.
    • Related Report
      2004 Annual Research Report
  • [Publications] Masaoka, T., Suzuki, H.et al.: "Enhanced plasma ghrelin levels in rats with streptozotocin-induced diabetes."FEBS Letters. 541(1-3). 64-68 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Miyazawa, M., Suzuki, H., Masaoka, T.et al.: "Suppressed apoptosis in the inflamed gastric mucosa of H.pylori-colonized iNOS knockout mice."Free Radical Biology and Medicine. 34(12). 1621-1630 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Ohara, T., Morishita, T., Suzuki, H., Masaoka, T.et al.: "Perforin and granzyme B of cytotoxic T lymphocyte mediate apoptosis irrespective of Helicobacter pylori infection : Possible act as a trigger of peptic ulcer formation."Hepatogastroenterology. 50(54). 1774-1779 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Suzuki, M., Suzuki, H., Masaoka, T.et al.: "Helicobacter pylori-eradication therapy inhibits neutrophil-derived oxidants in the ulcerous mucosa in the human stomach : Relationship between ulcer stage and mucosal oxidant level."Digestive Endoscopy. 151(4). 270-275 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Suzuki, H., Masaoka, T.et al.: "Helicobacter pylori infection modifies gastric and plasma ghrelin dynamics in Mongolian gerbils."Gut. 53(2). 187-194 (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] Suzuki, H., Masaoka, T.et al.: "Lansoprazole promotes gastric mucosal cell proliferation and migration by activating P44/P42 mitogen-activated protein kinase."Wound Repair and Regeneration. 12(1). 93-99 (2004)

    • Related Report
      2003 Annual Research Report

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Published: 2003-04-01   Modified: 2016-04-21  

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