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基礎科学と病態生理

Allison Snyder1, EunRan R Suh2, Laynie Dratch1

  • 1Penn Frontotemporal Degeneration Center, Department of Neurology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.

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PubMed
まとめ

行動型前頭側頭型認知症（bvFTD）は、著しい遺伝的および神経病理学的多様性を示す。本研究では、bvFTD症例における併存病理、特にアルツハイマー病神経病理学的変化（ADNC）の高い有病率が明らかになった。

キーワード:
行動型前頭側頭型認知症遺伝学神経病理学併存病理アルツハイマー病神経病理学的変化

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科学分野:

  • 神経科学；遺伝学；病理学

背景:

  • 行動型前頭側頭型認知症（bvFTD）は、多様な根本原因を持つ一般的なFTDの病型である。；bvFTDの遺伝的および病理学的状況を理解することは、診断と治療に不可欠である。

研究 の 目的:

  • 大規模bvFTDコホートの遺伝的および神経病理学的特徴を調査すること。；bvFTDにおける家族性リスクおよび併存病理のパターンを特定すること。

主な方法:

  • Rascovsky基準を用いて410例のbvFTD症例を特徴づけ、他の認知症を除外した。；家系図を用いて家族性リスクを評価し、遺伝子負担解析を実施した。；FTLD-TDP、FTLD-Tau、およびADNCなどの併存病理を含む88例の神経病理学的特徴を検査した。

主要な成果:

  • 単一遺伝子疾患症例107例を同定し、以前考えられていたよりも高い家族性負担を示唆した。；神経病理学的に検査された症例の59.1%でFTLD-TDP、39.8%でFTLD-Tauが認められた。；併存病理の高い割合が観察され、FTLD-TDPの50%、FTLD-Tauの37%でADNCが存在した。

結論:

  • bvFTDは、著しい遺伝的濃縮と高い併存病理率、特にADNCを示す。；ADNC併存病理に関する所見は、新たな疾患修飾療法の可能性を示唆する。；bvFTDに寄与する稀なバリアントを特定するには、さらなる遺伝子負担解析が必要である。