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KAKEN_15K14806seika.pdf
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Download
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:917.3 KB
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:Nov 12, 2018 |
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漂泳性ヒトデ幼生における摂餌・栄養代謝の特性に関する生理化学的研究
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ヒョウエイセイ ヒトデ ヨウセイ ニ オケル セツジ・エイヨウ タイシャ ノ トクセイ ニ カンスル セイリ カガクテキ ケンキュウ
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Hyōeisei hitode yōsei ni okeru setsuji eiyō taisha no tokusei ni kansuru seiri kagakuteki kenkyū
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Physiological, chemical, and molecular characteristics of feeding, nutrition, and growth of planktonic starfish larvae.
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池上, 晋
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イケガミ, ススム
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Ikegami, Susumu
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慶應義塾大学・自然科学研究教育センター・訪問教授
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Research team head
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科研費研究者番号 : 80011980
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金子, 洋之
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カネコ, ヒロユキ
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Kaneko, Hiroyuki
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慶應義塾大学・文学部・教授
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Research team member
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科研費研究者番号 : 20169577
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2018
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科学研究費補助金研究成果報告書
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2017
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棘皮動物イトマキヒトデの受精卵は胚を経てビピンナリア幼生となる。幼生は珪藻などを摂餌して成長し, ブラキオラリア幼生に移行する。イトマキヒトデ胚の細胞核にはトランスグルタミナーゼが存在する。このタンパク質の生成をそのmRNAと結合するモルフォリノアンチセンスオリゴの注入によって阻止すると, 胚は正常にビピンナリアとなるが, ブラキオラリア幼生にはならない。13C標識珪藻を給餌すると, 幼生の主要タンパク質β-アクチンに13Cが取り込まれるがその割合は正常幼生に比べて低い。ヒトデに特徴的に存在し, ヒストンを2量化する本核タンパク質の働きが幼生の摂餌・栄養代謝にとって重要であると結論される。
Following fertilization, the starfish, Asterina pectinifera, embryo develops to the blastula and then undergoes gastrulation to form a gut and create a feeding bipinnaria larva. The larva then takes on a more elaborate form called a brachioraria larva. The study was focused on the effect of loss of nuclear transglutaminase, a protein that is phylogenetically unique in the starfish embryo on feeding and the incorporation of 13C-labeled diatom into β-actin, by microinjecting the morpholino antisense oligonucleotide to block the formation of nuclear transglutaminase. The injected embryo developed normally through the embryonic and bipinnaria stages but the incorporation rate was low and larva was unable to reach the normal brachioralia stage. This result suggests that nuclear transglutaminase, which catalyzes the formation of histone dimers in nuclei of embryo and larva, is involved in feeding and nutrition in the starfish larva.
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研究種目 : 挑戦的萌芽研究
研究期間 : 2015～2017
課題番号 : 15K14806
研究分野 : 水圏生命科学
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