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臨床症状

Gonzalo Sánchez-Benavides1,2,3, Mariateresa Buongiorno4, Michalis Kassinopoulos1

  • 1Barcelonaβeta Brain Research Center (BBRC), Pasqual Maragall Foundation, Barcelona, Spain.

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まとめ
この要約は機械生成です。

認知機能が正常な個人における嗅覚機能障害(OD)は、DTI-ALPSで測定されるグリソン機能の低下と関連している。この関連は、ODが正常な嗅覚機能であっても、グリソン系の早期障害を示す可能性を示唆している。

キーワード:
嗅覚障害グリソン機能認知機能低下早期マーカー神経変性疾患

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科学分野:

  • 神経科学
  • 医用画像
  • 老年医学

背景:

  • 嗅覚障害(OD)は、加齢および神経変性疾患において一般的である。
  • 障害されたグリソン機能は、嗅覚系におけるタンパク質凝集体の蓄積に寄与する可能性がある。
  • 本研究では、認知症のリスクのある個人における嗅覚とグリソン機能の関係を調査する。

研究 の 目的:

  • 認知症の家族歴があり、認知機能が正常な個人における嗅覚パフォーマンスとグリソン機能(DTI-ALPS)との関連を調査する。
  • 嗅覚パフォーマンスの正常範囲内であっても、グリソン機能の低下が検出可能かどうかを評価する。

主な方法:

  • ALFAコホート(年齢47〜77歳)の1,369人の参加者を分析した。
  • 嗅覚はSniffin' Sticks identification(SSI)テストを使用して評価した。
  • ODはSSI <12と定義した。
  • グリソン機能は、Perivascular Spacesに沿った拡散テンソルイメージング(DTI-ALPS)によって測定した。
  • ロジスティック回帰および一般化線形モデル(GLM)を使用して、年齢、教育、性別、およびAPOE-ɛ4の状態を制御して関連を分析した。

主要な成果:

  • 嗅覚障害(18.8%)は、高齢、男性、および低いDTI-ALPSスコア(p=0.04)と関連していた。
  • 低いDTI-ALPSスコアは、連続SSIスコア(p=0.007)と正の相関があり、特にODのない個人(p=0.02)で顕著であった。
  • ODのある個人ではグリソン機能の低下が示唆されたが、層別分析では常に統計的に有意ではなかった。

結論:

  • 嗅覚同定スコアが低い認知機能が正常な個人は、グリソン機能(DTI-ALPS)の低下を示した。
  • この嗅覚とグリソン機能の関係は、嗅覚の正常範囲内でも存在する。
  • ODは、認知機能低下のリスクのある個人におけるグリソン機能障害の潜在的な早期臨床マーカーとして機能する可能性がある。