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2010 Fiscal Year Final Research Report

Histopathological study of Barrett's adenocarcinoma using analyses of mitochondrial DNA mutations

Research Project

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Project/Area Number 21790385
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeSingle-year Grants
Research Field Experimental pathology
Research InstitutionShiga University of Medical Science

Principal Investigator

MUKAISHO Kenichi  Shiga University of Medical Science, 医学部, 助教 (50343223)

Project Period (FY) 2009 – 2010
KeywordsBarrett食道 / ミトコンドリアDNA / ラット逆流モデル / 突然変異解析
Research Abstract

To elucidate the histogenesis of Barrett's esophagus (BE) progressing to esophageal adenocarcinoma (EAC), we examined mitochondrial DNA mutations and performed immunohistochemical staining and enzyme histochemistry of cytochrome c oxidase in various lesions (BE, EAC, squamous dysplasia, and squamous cell carcinoma). These lesions were induced in rat duodenal contents reflux models, which were previously reported models that had undergone esophagojejunostomy without gastrectomy. Previously, we reported that high dietary animal fat alters bile acid composition by increasing the concentration of taurine conjugates in bile. These increased bile acids promote the development of BE and Barrett's dysplasia progressing to EAC. In the present study, the reflux animal models were divided into two groups on the basis of their diet. The standard diet group was fed with a low soybean oil diet (CE-2) and the high-fat group was fed with a high cow fat diet (Quick Fat). The animals that survived the operation were sacrificed at postoperative weeks 10, 20, and 30. Cytochrome c oxidase was analyzed in the resected esophagi by both immunohistochemical staining and enzyme histochemistry. Cytochrome c oxidase-negative foci were detected in cases that demonstrated mitochondrial mutations, and these foci increased in a time-dependent manner. A significantly higher number of foci were observed in the high-fat group compared with the standard diet group. We observed that cytochrome c oxidase-negative foci first appeared in the proliferative zone of BE with goblet cells, and then proliferated in a manner similar to crypt fission of intestine. These foci were also detected in the normal regenerative squamous epithelium. However, we could not demonstrate the relationship between BE carcinogenesis and mitochondrial mutations.

  • Research Products

    (8 results)

All 2011 2010 2009

All Journal Article (3 results) (of which Peer Reviewed: 1 results) Presentation (5 results)

  • [Journal Article] Initiation of malignancy by duodenal contents reflux and the role of ezrin in developing esophageal squamous cell carcinoma.2010

    • Author(s)
      Ling ZQ, Mukaisho K, et al.
    • Journal Title

      Cancer Sci. 101

      Pages: 624-630

    • Peer Reviewed
  • [Journal Article] Barrett 食道の発生起源は何か-実験病理からみて-2010

    • Author(s)
      向所賢一, ら
    • Journal Title

      分子消化器病 7

      Pages: 7-14

  • [Journal Article] 病理医からみたBarrett粘膜とBarrett腺癌-米国人に多いLSBEとわが国に多いSSBEの組織型の違いについて2010

    • Author(s)
      向所賢一, ら
    • Journal Title

      G.I.Research 18

      Pages: 13-18

  • [Presentation] ラット胃・十二指腸液逆流モデルの下部食道に発生する化生円柱上皮の組織発生2011

    • Author(s)
      向所賢一, ら
    • Organizer
      第83回日本胃癌学会総会
    • Place of Presentation
      三沢市
    • Year and Date
      20110000
  • [Presentation] Initiation of malignancy by duodenal contents reflux and the role of ezrin in developing esophageal squamous cell carcinoma.2011

    • Author(s)
      Mukaisho K, Mukaisho K, et al., et al.
    • Organizer
      第6回国際消化器癌発生学会
    • Place of Presentation
      ヒューストン
    • Year and Date
      20110000
  • [Presentation] Pathogenesis and molecular mechanism of Barrett's carcinogenesis.2010

    • Author(s)
      向所賢一
    • Organizer
      第10回国際食道会議
    • Place of Presentation
      ボストン
    • Year and Date
      20100000
  • [Presentation] Initiation of malignancy by duodenal contents reflux and the role of ezrin in developing esophageal squamous cell carcinoma.2010

    • Author(s)
      Mukaisho K, et al.
    • Organizer
      第8回日本癌学会・AACR合同会議
    • Place of Presentation
      ハワイ島
    • Year and Date
      20100000
  • [Presentation] Short segment Barrett esophagusの発生過程-新しい胃食道逆流症新刊モデルからの知見-2009

    • Author(s)
      向所賢一, ら
    • Organizer
      第20回日本消化器癌発生学会総会
    • Place of Presentation
      広島
    • Year and Date
      20090000

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Published: 2012-02-13   Modified: 2016-04-21  

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