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基礎科学と病態生理

Tovia Jacobs1, Jaime Ramos Cejudo1, Mark He2

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まとめ
この要約は機械生成です。

末梢動脈疾患(PAD)患者において、血小板凝集の亢進は、アルツハイマー病(AD)の病理マーカーであるp-tau181や神経変性マーカーであるNfLの増加と関連していた。より大規模なコホートでこれらの所見を確認する必要がある。

キーワード:
血小板凝集アルツハイマー病末梢動脈疾患神経変性バイオマーカー

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科学分野:

  • 神経学; 心血管医学; 生化学

背景:

  • 心血管リスク因子は認知症に大きく寄与するが、その根底にある生物学的メカニズムの解明が必要である。; 血小板凝集の亢進は認知症の既知のリスク因子であり、血管負荷の高い個人における併存疾患によって複雑化している。; Platelet Activity and Cardiovascular Events (PACE)研究は、末梢動脈疾患(PAD)患者における血小板活性とアルツハイマー病(AD)バイオマーカーとの関連を調査した。

研究 の 目的:

  • 心血管リスク因子と認知症を繋ぐ生物学的媒介因子を明らかにすること。; PAD患者における血小板凝集とADバイオマーカーとの関係を調べること。; 血小板活性とAD病理および神経変性マーカーとの潜在的な関連を調査すること。

主な方法:

  • 血小板凝集は、光透過凝固測定法(LTA)を用いて測定した。; リン酸化タウ(p-tau181)、総タウ、神経線維軽鎖(NfL)、およびグリア線維性酸性タンパク質(GFAP)の血清濃度は、SIMOAを用いて定量化した。; 単変量、LASSO選択共変量、および人口統計学的/治療的要因を調整して、関連を評価するために四分位回帰モデルを使用した。

主要な成果:

  • 101例のPAD患者において、血小板凝集(ADPおよびエピネフリンによる)の亢進は、p-tau181およびNfLレベルの上昇と相関していた。; 血小板凝集と総タウまたはGFAPレベルとの間には、有意な関連は見られなかった。; 研究コホートの中央年齢は70歳で、大多数は男性であり、多血管疾患を有し、血小板修飾療法を受けていた。

結論:

  • 血小板凝集は、認知症のないPAD患者におけるAD病理(p-tau181)および神経変性(NfL)マーカーと関連していた。; これらの所見は、AD病理および神経炎症の媒介における血小板凝集の潜在的な役割を示唆している。; これらの関連を検証し、根底にあるメカニズムをさらに探求するためには、より大規模なコホート研究が必要である。