• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Influence of lymphoid organs located upstream of portal vein on induction of hepatitis of Japanese flounder affected with edwardsiellosis

Research Project

Project/Area Number 16K07882
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Aquatic life science
Research InstitutionNippon Veterinary and Life Science University

Principal Investigator

Kurata Osamu  日本獣医生命科学大学, 獣医学部, 教授 (90277666)

Co-Investigator(Kenkyū-buntansha) 坂井 貴光  国立研究開発法人水産研究・教育機構, 増養殖研究所, 主任研究員 (50416046)
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2018: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2017: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Keywords肝炎 / 脾臓 / 炎症性メディエーター / エイコサノイド / 肝門脈血 / サイトカイン / ヒラメ / Edwardsiella tarda / 免疫病理 / 炎症 / 魚類 / 感染症 / 肝臓
Outline of Final Research Achievements

The bacterial cells are not directly responsible for induction of hepatitis observed in a bacterial disease (edwardsiellosis) of Japanese flounder Paralichthys plivaceus. We hypothesized that influx of inflammatory mediators from lymphoid organs to the liver causes the induction of hepatitis. The spleen at the early stages of edwardsiellosis produced some inflammatory mediators such as eicosanoids and interleukin 1β which were also detected in portal venous blood. Therefore we suggest that inflammatory mediators produced by the spleen induce the hepatitis of edwardsiellosis.

Academic Significance and Societal Importance of the Research Achievements

主要臓器の過度な炎症は動物の健康を害し、場合によっては死因となる。ヒラメの重要疾病であるエドワジエラ症は重度な肝炎を引き起こし、これが死亡の原因となっている。肝炎の進行を抑えることが本疾病の効果的な予防対策と考え、肝炎誘発の原因について研究を行った。その結果、肝臓近傍のリンパ組織(脾臓)から産生される炎症性メディエーターが肝炎誘発の原因であることを示唆できた。本成果はヒラメエドワジエラ症の予防対策研究の基盤となる一方、臓器間相互作用による炎症形成という新たな研究領域を創出する。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (5 results)

All 2018 2017 2016

All Presentation (5 results) (of which Int'l Joint Research: 3 results)

  • [Presentation] ヒラメMHCクラスⅡ陽性細胞の検出2018

    • Author(s)
      倉田 修,宮下素優,戸田宗生,和田新平,坂井貴光
    • Organizer
      日本比較免疫学会第30回学術集会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Proteomic analysis with 2D-PAGE of liver protein extracted from Japanese flounder affected with Edwardsiella piscicida2017

    • Author(s)
      Takamitsu Sakai, Satoshi Miwa, Atsushi Fujiwara, Tomokazu Takano, Osamu Kurata
    • Organizer
      10th Symposium on Diseases in Asian Aquaculture
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Distribution of MHC class Ⅱ positive cells in Japanese flounder, Paralichthys olivaceus2017

    • Author(s)
      Shusei Toda, Osamu Kurata, Shinpei Wada, Takamitsu Sakai
    • Organizer
      10th Symposium on Diseases in Asian Aquaculture
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 魚類の炎症反応調節・制御機構に関する研究(平成28年度日本魚病学会研究奨励賞)2017

    • Author(s)
      倉田 修
    • Organizer
      平成29年度日本魚病学会春季大会
    • Place of Presentation
      日本大学生物資源学部(神奈川県藤沢市)
    • Related Report
      2016 Research-status Report
  • [Presentation] Gene expression of interleukin 8 in liver of Japanese flounder Paralichthys olivaceus infected with Edwardsiella tarda2016

    • Author(s)
      Osamu Kurata, Shinpei Wada
    • Organizer
      2nd International Conference of Fish and Shellfish Immunology
    • Place of Presentation
      Poetland, Maine, USA
    • Year and Date
      2016-06-27
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research

URL: 

Published: 2016-04-21   Modified: 2020-03-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi