機能的な聴覚毛細胞は,子宮内での遺伝子転送によって哺乳類の耳で生成される
Samuel P Gubbels1, David W Woessner, John C Mitchell
1Department of Otolaryngology, Oregon Hearing Research Center, Portland, Oregon 97239, USA.
Nature
|August 30, 2008
まとめ
アトーナルの同種1 (Atoh1) を用いた遺伝子治療は,マウスの大腸に機能的感覚毛細胞を成功裏に作り出した. この画期的な発見は,難聴に対する新たな治療法の開発の可能性を秘めています.
科学分野:
- 神経科学は神経科学である.
- 遺伝学 遺伝学とは
- 耳鼻喉科 (Otorhinolaryngology) は,耳鼻喉科 (Otorhinolaryngology) を専門とする医療機関である.
背景:
- 聴覚毛細胞は聴覚に不可欠であり,その喪失は聴覚障害を引き起こす.
- アトノールホモログ1 (Atoh1) は,毛細胞発達の重要な転写因子である.
- Atoh1の誤発現は,毛細胞のような細胞を生成し,治療の可能性を示唆する.
研究 の 目的:
- Atoh1の誤発現によって誘発された毛細胞の生体物理的性質を調査する.
- 子宮内でのAtoh1の遺伝子転送が哺乳類のコクレアで機能的な感覚細胞を生成できるかどうかを決定する.
主な方法:
- ネズミにおけるAtoh1の子宮内遺伝子転送.
- 誘導毛細胞形態の分析,ステレオシリアル束を含む.
- ニューロンの内置とシナプス形成の評価 (カーボキシ末端結合タンパク質2を用いて).
- 電気生理学的記録は,メカノ電気伝導とベースラテラル伝導度を評価するためのものです.
主要な成果:
- In utero Atoh1の遺伝子移植により,マウスの頭蓋骨内の機能的な超数値毛細胞が生成されました.
- 誘導毛細胞は,特徴的なステレオシリアル束を呈し,神経のプロセスを引き寄せました.
- これらの細胞はリボンシナプスマーカーを発現し,機械電気伝導を行うことができました.
- 毛細胞は,年齢に適したベース・ラテラル伝導率を示した.
結論:
- 転写因子の誤表現は,産後哺乳類のコクレアで機能的な感覚細胞を生成することができます.
- この研究は,聴覚および前立腺機能不全に対するAtoh1ベースの遺伝子療法の可能性を実証しています.
- 子宮内の遺伝子移植アプローチは,マウスモデルにおける難聴に対する治療法の開発のためのプラットフォームを提供します.
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