モトニューロン固有のマイクロRNA-218の喪失は,全身神経筋機能不全を引き起こす
Neal D Amin1, Ge Bai2, Jason R Klug3
1Howard Hughes Medical Institute and Gene Expression Laboratory, Salk Institute for Biological Studies, 10010 North Torrey Pines Road, La Jolla, CA 92037, USA. Medical Scientist Training Program, University of California, San Diego (UCSD), 9500 Gilman Drive, La Jolla, CA 92037, USA. Biomedical Sciences Graduate Program, UCSD, 9500 Gilman Drive, La Jolla, CA 92037, USA.
Science (New York, N.Y.)
|December 19, 2015
まとめ
マウスにおけるマイクロRNA-218 (miR-218) の喪失は,神経筋肉の結合欠陥と細胞喪失を含むモトニューロン疾患の特徴を引き起こします. これは,miR-218が神経変性や神経筋不全の予防に不可欠であることを示唆しています.
科学分野:
- 神経科学
- 遺伝学
- 分子生物学
背景:
- マイクロRNA (miRNA) の代謝機能障害は,モトニューロン疾患に関与しています.
- miR-218は発達期および成熟期において,高度かつ特異的にモートニューロンに発現する.
研究 の 目的:
- 運動ニューロンの機能と生存における miR-218の役割を調査する.
- 運動ニューロンの miR-218 によって調節される遺伝子ネットワークを特定する.
主な方法:
- miR-218を欠いた ミュータントマウスの分析
- miR-218の標的を特定する 遺伝子表現のプロフィール
- 神経筋結節の整合性と運動ニューロンの興奮性の評価
主要な成果:
- miR-218が欠けていたマウスは,新生児死亡率,神経筋肉の結合欠陥,運動ニューロンの過興奮,および進行的な運動ニューロンの喪失を示した.
- miR-218は ニューロンに富んだ何百もの遺伝子を わずかに抑制することが判明しました
- 特定されたターゲットセット,TARGET (((218),は,モトニューロンで選択的にダウンレギュレーションされたニューロン遺伝子ネットワークを定義します.
結論:
- miR-218は神経筋機能不全や神経変性の予防に不可欠です.
- miR-218ネットワークの調節不良は,モトニューロン疾患の病原化に寄与する.
- miR-218ネットワークをターゲットにすることで,運動神経疾患の治療戦略を提供することができる.
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