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Inference of low salinity to hemolymph hemagglutinin of the pearl oysters in post-operative care of the implantation

Research Project

Project/Area Number 16K07842
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Aquatic bioproduction science
Research InstitutionMie University

Principal Investigator

Sano Natsumi  三重大学, 生物資源学研究科, 学術研究員 (50636545)

Co-Investigator(Kenkyū-buntansha) 古丸 明  三重大学, 生物資源学研究科, 教授 (10293804)
Research Collaborator Tanaka Shinji  
Kuriyama Isao  
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2018: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords真珠養殖 / アコヤガイ / レクチン / 血リンパ / 血球 / 凝集反応 / pearl oyster / hemagglutination / 真珠 / キズ・シミ / 生体防御 / 養生 / 仕立て / 凝集力価 / RNA干渉 / 定量PCR / 凝集素 / 水産学 / 低塩分飼育
Outline of Final Research Achievements

Pearl deformities and blemishes can be alleviated by holding Akoya pearl oyster Pinctada fucata in low salinity seawater during the post-operative period just after implanting a pearl nucleus. To reveal the mechanisms, we first investigated effect of low salinity rearing on hemagglutination (HA) activity mostly due to lectins in hemolymph as an innate immune response. HA raised after nucleus implantation and decreased at salinity of 25 psu. Next, we investigated gene expression of Pogal, a galactose specific lectin of the pearl oyster. Downregulation of Pogal was observed in operated and unoperated oyster reared at 25 psu. Additionally, we gained anti-pearl oyster lectins antibodies, and carried out FACS analysis of hemocytes using these antibodies. The ratio of lectin-positive hemocytes increased after the implantation. The results suggest that one of the mechanisms of the alleviation in low salinity rearing can be downregulation of lectins in hemocytes.

Academic Significance and Societal Importance of the Research Achievements

本研究の結果から,挿核に対する生体防御の反応をコントロールすることで真珠の品質を向上させられる可能性が示唆された。真珠産業は漁場の環境悪化や人手不足により厳しい状況にある。効率よく高品質の真珠が生産できるようになれば,それらの改善につながり,日本が誇る産業のひとつである真珠養殖の振興に寄与できる。一方,学術的には無脊椎動物の生体防御で重要な役目を果たしているレクチンに関して,近年,二枚貝でも遺伝子レベルではそれらの存在や刺激で転写が上昇する等は解明されているが,タンパク質や細胞レベルでの研究は少なく,本研究の結果は新規性の高いものであり,今後のこの分野の研究に貢献できる。

Report

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

    (6 results)

All 2019 2018 2017 2016

All Journal Article (1 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results,  Acknowledgement Compliant: 1 results) Presentation (4 results) (of which Int'l Joint Research: 2 results) Funded Workshop (1 results)

  • [Journal Article] Hemolymph haemagglutination activity of pearl oysters Pinctada fucata in post-o2017

    • Author(s)
      Natsumi Sano1, Takashi Atsumi, Shinji Tanaka & Akira Komaru
    • Journal Title

      Aquaculture Research

      Volume: 印刷中

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Presentation] 真珠養殖の行程「養生」期間のアコヤガイ血球でのガレクチンとF typeレクチンの発現2019

    • Author(s)
      佐野菜採・栗山功・田中真二・古丸 明
    • Organizer
      平成31年度日本水産学会春季大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Influence of low-salinity post-operative care on hemaggultination in the hemolymph of akoya pearl oyster Pinctada fucata2018

    • Author(s)
      Natsumi Sano, Takashi Atsumi, Shinji Tanaka & Akira Komaru
    • Organizer
      Asian-Pacific Aquaculture
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Hemolymph hemagglutinin of pearl oysters Pinctada fucata involved in post-operative care of the implantation2016

    • Author(s)
      Natsumi Sano1, Takashi Atsumi, Shinji Tanaka & Akira Komaru
    • Organizer
      12th Japan-Korea, Korea-Japan symposium on Aquaculture
    • Place of Presentation
      三重大学(三重県 津市)
    • Year and Date
      2016-11-03
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] 真珠のキズ・シミに関連するアコヤガイ血リンパ中の赤血球凝集素2016

    • Author(s)
      佐野菜採・渥美貴史・田中真二・古丸 明
    • Organizer
      日本比較免疫学会第28回学術集会
    • Place of Presentation
      東京医科歯科大学(東京都 文京区)
    • Year and Date
      2016-08-18
    • Related Report
      2016 Research-status Report
  • [Funded Workshop] Asian-Pacific Aquaculture2019

    • Related Report
      2018 Annual Research Report

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

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