テヌーリン-3は,海馬内のトポグラフィック回路の組み立てを制御する

Dominic S Berns^1,2,3, Laura A DeNardo^1,2, Daniel T Pederick^1,2

¹Howard Hughes Medical Institute, Stanford University, Stanford, California 94305, USA.

Nature

|February 8, 2018

まとめ

ネズミの特定の脳の領域を繋ぐのに不可欠ですこのタンパク質は細胞の結合を促すことでヒポカムスの神経細胞の正確な標的を導きます

科学分野:

神経科学
分子生物学
発達生物学

背景:

脳の接続性は機能に不可欠です
テヌーリンは,シナプスマッチングと視覚システムの発達に関与するタンパク質です.
脊椎動物のテヌリンが視覚系以外で果たす役割とそのメカニズムはほとんど不明である.

研究の目的:

哺乳類の脳の接続性におけるテヌリン3の役割を調査する.
神経回路の組み立てにおけるテヌリン-3の作用メカニズムを解明する.

主な方法:

ネズミのヒポキャンパスのサブ領域 (CA1,サビキュラム,中枢の腸内皮質) でのテヌリン-3発現を調べた.
ウイルス遺伝的技術を用いて,体内のテヌリン-3機能を評価した.
テヌリン-3の同型粘着性に関する試験を in vitro で行った.

主要な成果:

テヌーリンは,相互接続された海馬領域で発現する.
テンアウリン-3はCA1とサブキュラルのニューロンで,CA1からサブキュラムへの精密な軸索標的化のために必要である.
テヌーリンは同型結合をスプライシングイソフォームに依存した方法で媒介する.

結論:

テヌーリン3は,海馬領域内の特定の接続を確立する上で重要な役割を果たします.
テヌーリン-3は,同性愛吸引とマッチング表現を通じて複雑な回路の組み立てをオーケストラすることができます.
発見は,脳の領域の接続性とテヌリン-3の機能における遺伝的異質性を強調しています.

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