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公衆衛生

Jenna Najar1,2,3, Robert Sigström2, Lina Jonsson2

  • 1Alzheimer Center Amsterdam, Neurology, Vrije Universiteit Amsterdam, Amsterdam UMC location VUmc, Amsterdam, Netherlands.

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まとめ

アルツハイマー病(AD)の遺伝的リスクは、双極性障害(BD)を有する個人の認知症リスクを高める。この発見は、BDと認知症の関連性を明確にし、リスク評価と予防戦略に役立つ。

キーワード:
アルツハイマー病双極性障害認知症遺伝的リスク公衆衛生

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科学分野:

  • 神経科学
  • 遺伝学
  • 精神医学

背景:

  • 双極性障害(BD)を有する個人は、認知症のリスクが高いことが示されています。
  • このリスク増加に寄与する特定の遺伝的要因は、依然として大部分不明です。
  • BDと認知症の間の遺伝的重複を理解することは、効果的な介入を開発するために不可欠です。

研究 の 目的:

  • アルツハイマー病(AD)およびレビー小体型認知症(DLB)の遺伝的リスク因子と、双極性障害(BD)を有する個人における認知症リスクとの関連性を調査すること。
  • BD患者における認知症発症におけるAPOE ε4キャリア性とADおよびDLBの多因子リスクスコア(PGS)の役割を探求すること。

主な方法:

  • スウェーデン双極性コレクション(SWEBIC)から得られた2,238人の遺伝子型が決定されたBD患者のデータを利用しました。
  • 全国患者登録コードを使用して認知症の診断を特定しました。
  • ADおよびDLBの非APOE多因子スコア(PGS)を計算し、APOE ε4キャリア性を評価しました。
  • 共変量を調整して、遺伝的要因と認知症リスクの関係を調べるためにコックス回帰分析を用いました。

主要な成果:

  • APOE ε4キャリア性は、BD患者における認知症リスクの増加と有意に関連していました(ハザード比:1.88、p=0.007)。
  • アルツハイマー病(AD)の多因子リスクスコア(AD-PGS)が高いことも、認知症リスクの増加と関連していました(ハザード比:1.34、p=0.01)。
  • レビー小体型認知症(DLB)の多因子リスクスコア(DLB-PGS)とこのコホートにおける認知症リスクとの間には、有意な関連は見られませんでした。

結論:

  • アルツハイマー病への遺伝的素因は、双極性障害を有する個人における認知症の発症に寄与します。
  • これらの発見は、ADとBDの間の共有された遺伝的基盤を明らかにしました。これにより、BD患者における認知症の病因に関する洞察が得られます。
  • 結果は、BD集団における認知症のリスク層別化と標的予防戦略の可能性を支持します。