誘発性多能幹細胞を用いた散発性および家族性アルツハイマー病の検査
Mason A Israel1, Shauna H Yuan, Cedric Bardy
1Howard Hughes Medical Institute and Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, California 92093, USA.
Nature
|January 27, 2012
まとめ
アルツハイマー病患者の誘発性多能幹細胞 (iPSC) は,患者特有の神経細胞を生成します. これらのニューロンは,疾患のメカニズムを明らかにし,病理学的マーカーの上昇を示し,家族性および散発性アルツハイマー病のモデルを提供します.
科学分野:
- 神経科学は神経科学である.
- 幹細胞生物学 幹細胞生物学
- 遺伝学 遺伝学とは
背景:
- アルツハイマー病 (AD) の病原性に関する理解は,患者のニューロンを取得し,散発的な形態をモデル化するという課題によって制限されています.
- 誘導性多能幹細胞 (iPSC) は,患者の細胞をニューロンモデルに再プログラムすることで,潜在的な解決策を提供します.
研究 の 目的:
- 家族性および散発性アルツハイマー病患者のiPSC由来ニューロンを生成し,特徴づけること.
- これらの患者特有のニューロンにおけるADに関連する病理学的マーカーと細胞のフェノタイプを調査する.
- 秘密酵素阻害剤を試験することによって,潜在的な治療標的を探求する.
主な方法:
- ファミリアルAD (APP複製),散発性AD,および対照個体からの線維芽細胞のIPSCへの再プログラム.
- iPSCsをニューロンへと分化し,その後,光活性化細胞分類を用いた浄化を行います.
- ニューロンの純度,シナプス機能,電気生理学,および分子マーカー (アミロイド-β,フォスフォ-タウ,GSK-3β) の特徴付け.
- β-分泌酵素および γ-分泌酵素阻害剤による治療は,病理学的マーカーに対する効果を評価する.
主要な成果:
- 家族性および散発性AD患者からのiPSC由来ニューロンは,アミロイド-β (((1-40),フォスフォ-タウ (((Thr231),および活性GSK-3β.のレベルが上昇しました.
- 初期エンドソームの蓄積は,APP複製のニューロンと1人の散発的なAD患者で観察されました.
- β-分泌酵素阻害剤は含まないが, γ-分泌酵素阻害剤は含まない,フォスフォ-タウの減少およびGSK-3βの活性レベルは含まない.
- 一人の散発的なAD患者からのニューロンは,家族的なADニューロンに類似したフェノタイプを示した.
結論:
- iPSCテクノロジーは,患者から派生した神経細胞でアルツハイマー病の現象型を成功裏にモデル化しています.
- アミロイドβ自体ではなく,APPのタンパク質分解処理がGSK-3βの活性化とタウリン酸化に関連しているようです.
- このアプローチは,ADの病原性を研究し,治療的介入をテストするための貴重なプラットフォームを提供します.
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