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2020 Fiscal Year Final Research Report

Identificatin of discus nursing facitors and application to fish production

Research Project

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Project/Area Number 17K19290
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Research Field Forestry and Forest Products Science, Applied aquatic science, and related fields
Research InstitutionSetsunan University (2020)
Kyoto University (2017-2019)

Principal Investigator

Toyohara Haruhiko  摂南大学, 農学部, 教授 (90183079)

Co-Investigator(Kenkyū-buntansha) 前川 真吾  京都大学, 情報学研究科, 助教 (30467401)
Project Period (FY) 2017-06-30 – 2021-03-31
Keywords哺育因子 / ディスカス / ディスカスミルク / 免疫グロブリン
Outline of Final Research Achievements

In this study, in order to identify mammalian growth factors in discus milk, we searched for genes induced in the mucus of discus parent fish by RNA sequencing analysis using a next-generation sequencer that can comprehensively analyze gene expression. As a result, immunoglobulins were found as candidates for mammalian growth factors, and their dynamics in the hatchlings suggested that immunoglobulins may be the mammalian growth factors that have been sought for many years.

Free Research Field

海洋生物機能学

Academic Significance and Societal Importance of the Research Achievements

本研究の結果、ディスカスの仔魚は免疫グロブリンをディスカスミルクからmRNAの形で摂取し、自身の体内に取り込んだ後にタンパク質に翻訳している可能性が示唆された。仔魚が親魚表皮の粘液をついばんだ後に消化管内で小胞中において翻訳が誘導される分子機構を解明することにより、すでに実用化されている種苗生産現場における健苗育成技術として活用することができるだけでなく、仔魚期の生残率が低く種苗生産の困難なウナギ等の養殖魚の初期飼料への応用に寄与することも期待される。

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Published: 2022-01-27  

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