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Study on the mechanism of antibody transport to avian egg yolks by PLA2R receptor and its application to produce eggs rich in IgY

Research Project

Project/Area Number 20H03128
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 42010:Animal production science-related
Research InstitutionNagoya University

Principal Investigator

Murai Atsushi  名古屋大学, 生命農学研究科, 教授 (10313975)

Co-Investigator(Kenkyū-buntansha) 水島 秀成  北海道大学, 理学研究院, 助教 (20515382)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2022: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2021: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2020: ¥7,540,000 (Direct Cost: ¥5,800,000、Indirect Cost: ¥1,740,000)
Keywords畜産学 / 栄養生理学 / ニワトリ / 卵 / IgY / 抗体 / 母子免疫 / 鳥類 / ゲノム編集 / 生理学 / 栄養学 / ウズラ
Outline of Research at the Start

鳥類の卵黄には感染防御能を持つIgY抗体が蓄積しており、次世代ヒナの免疫能の強化に必須である。このIgYの輸送は卵胞に存在するIgY受容体との結合により行われると考えられているが、その同定例はない。本研究では、候補受容体として着目した「ホスホリパーゼA2受容体(=PLA2R)」が卵黄へのIgY輸送を担う受容体であることを証明し、この輸送の分子機構を解明することを目的とする。さらに、PLA2Rへの結合を強化した新しいIgY変異体を創出して、高IgY卵の創出を目指す。

Outline of Final Research Achievements

Avian IgY antibodies are accumulated in egg yolks to protect against infection, and they are essential for strengthening the immune function of the next generation of chicks. In this study, we aimed to examine that PLA2R is the receptor responsible for IgY transport to the egg yolk. By investigating localization of PLA2R expression in the ovary, we found that PLA2R is expressed in the terminal capillaries of the theca cell layer of the ovarian follicle. Binding analysis of IgY mutants to PLA2R showed that the mutant with high transport efficiency (G365A) had strong binding activity to PLA2R, while the mutants with low transport efficiency (G365D, N408A) had weak binding activity to PLA2R. As an exception, the Y363A mutant, which is not transported to the egg yolk, was found to have a significantly strong binding affinity to PLA2R and was difficult to dissociate. Therefore, it was found that PLA2R is the key receptor that regulates IgY transport to the egg yolk.

Academic Significance and Societal Importance of the Research Achievements

PLA2Rが鳥類の母子免疫を制御する鍵受容体であることが明らかにされたことで、母子免疫という多くの生物種が保有する事象の仕組みの一端が明らかとなった。そして、FcRY/IgY相互作用を制御することで、鳥類の卵黄中のIgY量を増やし、鳥類の新生ヒナの免疫力を高めるための新しい戦略を提供できる可能性を秘める。遺伝子改変されたFcRY/IgY相互作用によって引き起こされる免疫異常も慎重に考慮した上で、今後の研究戦略を練る必要があろう。

Report

(4 results)
  • 2023 Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (13 results)

All 2024 2023 2022 2021 2020 Other

All Journal Article (3 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (6 results) (of which Invited: 1 results) Book (3 results) Remarks (1 results)

  • [Journal Article] FcRY is a key molecule controlling maternal blood IgY transfer to yolks during egg development in avian species2024

    • Author(s)
      Okamoto Mayuko、Sasaki Ryo、Ikeda Koki、Doi Kasumi、Tatsumi Fumiya、Oshima Kenzi、Kojima Takaaki、Mizushima Shusei、Ikegami Keisuke、Yoshimura Takashi、Furukawa Kyohei、Kobayashi Misato、Horio Fumihiko、Murai Atsushi
    • Journal Title

      Frontiers in Immunology

      Volume: 15 Pages: 1305587-1305587

    • DOI

      10.3389/fimmu.2024.1305587

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Evaluation of a receptor gene responsible for maternal blood IgY transfer into egg yolks using bursectomized IgY-depleted chickens.2020

    • Author(s)
      Murai, A., Hamano, T., Kakiuchi, M., Kobayashi, M. and Horio, F.
    • Journal Title

      Poult. Sci.

      Volume: 99 Issue: 4 Pages: 1914-1920

    • DOI

      10.1016/j.psj.2019.11.045

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 加齢による産卵率低下の原因探索:産卵ピーク期とリタイア期における脂質代謝特性の比較2020

    • Author(s)
      渡辺駿斗, 村井篤嗣
    • Journal Title

      養鶏の友

      Volume: 5 Pages: 40-42

    • NAID

      40022246085

    • Related Report
      2020 Annual Research Report
  • [Presentation] Maternal antibody transfer into egg yolks and new-born chicks in avian species2023

    • Author(s)
      Atsushi Murai
    • Organizer
      Avian Bioresource in Asia -The Power and Use of Bioresources-, Mini-Workshop
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 鳥類の母子免疫と血中IgY動態を制御するホスホリパーゼA2受容体の組織発現分布2023

    • Author(s)
      岡本真由子、佐々木諒、村井篤嗣
    • Organizer
      日本畜産学会第131回大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 母ドリの卵巣と全身組織におけるPLA2R受容体の発現局在とIgY輸送特性の解析2022

    • Author(s)
      佐々木諒・大島健司・小林美里・堀尾文彦・村井篤嗣
    • Organizer
      2021年度日本家禽学会春季大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 産卵ウズラへの抗PLA2R抗体の投与は卵黄へのIgY輸送量を減少させる2021

    • Author(s)
      岡本真由子・小林美里・堀尾文彦・村井篤嗣
    • Organizer
      2021年度日本家禽学会秋季大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 産卵期のニワトリおよびウズラにおけるIgY受容体「PLA2R」の発現局在解析2021

    • Author(s)
      佐々木諒・小林美里・堀尾文彦・村井篤嗣
    • Organizer
      日本畜産学会第128回大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 産卵期のウズラにおいて脂肪肝を誘導する栄養因子の探索とその発症機構の解析2021

    • Author(s)
      森大樹・Gong Shengnan・小林美里・堀尾文彦・村井篤嗣
    • Organizer
      2021年度日本家禽学会春季大会
    • Related Report
      2020 Annual Research Report
  • [Book] 生物の科学 遺伝2021

    • Author(s)
      岩澤淳, 村井篤嗣
    • Total Pages
      6
    • Publisher
      (株)エヌ・ティー・エス
    • Related Report
      2021 Annual Research Report
  • [Book] 「トリ類」. 実験動物の技術と応用 入門編2021

    • Author(s)
      村井篤嗣
    • Total Pages
      8
    • Publisher
      (株)アドスリー
    • Related Report
      2021 Annual Research Report
  • [Book] 「トリ類」. 実験動物の技術と応用 応用編2021

    • Author(s)
      村井篤嗣
    • Total Pages
      10
    • Publisher
      (株)アドスリー
    • Related Report
      2021 Annual Research Report
  • [Remarks] 鳥類の母子免疫の仕組みを解明 ~ヒナの免疫機能の向上や機能性卵の作出への応用に期待~

    • URL

      https://www.nagoya-u.ac.jp/researchinfo/result/2024/03/post-635.html

    • Related Report
      2022 Annual Research Report

URL: 

Published: 2020-04-28   Modified: 2025-01-30  

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