プログランウリンのゼロ変異は,染色体17q21と関連したウビキチン陽性フロントテンポラル認知症を引き起こす
Marc Cruts1, Ilse Gijselinck, Julie van der Zee
1Neurodegenerative Brain Diseases Group, Department of Molecular Genetics, Flanders Interuniversity Institute for Biotechnology, Universiteitsplein 1, BE-2610 Antwerpen, Belgium.
Nature
|July 25, 2006
まとめ
プログランウリン (PGRN) 遺伝子の変異は,PGRNレベルを低下させ,神経変性を引き起こすことにより,前頭葉門性認知症 (FTDU-17) を引き起こします. PGRN変異は,家族性FTDでは,MAPT変異よりも一般的です.
科学分野:
- 神経科学は神経科学である.
- 遺伝学 遺伝学とは
- 分子生物学は分子生物学である.
背景:
- ユビキチン-免疫反応性ニューロン包摂 (Ubiquitin-immunoreactive neuronal inclusions) (FTDU-17) の前頭葉性認知症 (FTD) は,染色体17q21と関連しているが,タウ病理は欠けている.
- FTDU-17患者では,MAPT遺伝子領域の変異と再編成が排除されています.
研究 の 目的:
- FTDU-17.7の遺伝的原因を特定するために.
- FTDの病原性におけるプログランウリン (PGRN) の役割を調査する.
主な方法:
- MAPTの関与を排除するために,ゲノムシーケンシングと光 in situ ハイブリダイゼーションが使用されました.
- PGRN遺伝子の変異分析,スプライスドナー部位と翻訳開始コードンを含む.
- PGRN発現レベルを確認するためのトランスクリプトとタンパク質の分析.
主要な成果:
- FTDU-17は,PGRN遺伝子の変異によって引き起こされます.
- 特定された変異は,スプライスドナー部位変異 (IVS0 + 5G > C) と翻訳開始コドン変異 (c.3G > A) を含む.
- これらの変異は,PGRN発現の低下とハプロイン不十分性につながる.
結論:
- PGRNハプロイン不足は,PGRN媒介のニューロン生存率の低下により神経変性を引き起こす.
- PGRN変異は,家族性FTDの頻繁な原因であり,ベルギーのコホートでMAPT変異よりも3.5倍頻繁に発生します.
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