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臨床症状

Eleni Palpatzis1,2,3, Mahnaz Shekari2, Muge Akinci2,3,4

  • 1Global Health Institute Barcelona (ISGlobal), Barcelona, Spain.

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まとめ
この要約は機械生成です。

感情処理に関与する脳領域におけるアミロイドβ(Aβ)の蓄積が速いと、心的外傷後ストレス障害(PTSD)の症状に対する脆弱性が高まる可能性がある。この加速されたAβ蓄積は、特に侵入症状と関連しており、情動調節の困難における役割を示唆している。

キーワード:
アミロイドβ心的外傷後ストレス障害脳画像神経科学アルツハイマー病

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科学分野:

  • 神経科学
  • アルツハイマー病研究
  • メンタルヘルス

背景:

  • 精神症状は、アルツハイマー病(AD)の早期指標としてますます認識されている。
  • AD病理と心的外傷後ストレス障害(PTSD)のような精神疾患を結びつける神経学的基盤は不明なままである。
  • 本研究は、感情処理に関連するAD脆弱性脳領域におけるアミロイドβ(Aβ)蓄積に関する地域的脆弱性仮説を調査する。

研究 の 目的:

  • COVID-19パンデミック後の特定の脳領域におけるAβ蓄積率とPTSD症状との関連を調べること。
  • 感情処理領域における早期Aβ沈着がPTSD症状の重症度と相関するかどうかをテストすること。

主な方法:

  • ALFA研究から得られた628人の認知的に問題のない個人のデータを使用し、イベントの影響尺度改訂版(IES-R)を用いてパンデミック後のPTSD症状を評価した。
  • 115人の参加者は、約3.36年間にわたって2回の[18F]フルツメタモールPETスキャンを受け、定義済みの関心領域(ROI)におけるAβ蓄積の変化(Δ)を測定した。
  • 線形回帰モデルを用いて、人口統計学的/臨床的要因とPTSDスコアとの関連、および特にROIにおけるΔAβとPTSDの全体およびサブスコアとの関連を分析した。

主要な成果:

  • パンデミック後、女性、不安が高い(HADS)個人、精神疾患の既往歴のある個人は、より高い総PTSD症状を報告した。
  • 後部帯状回におけるAβ蓄積の速さは、より高い総PTSD症状と関連していた。
  • 複数のROI(管理領域を除く)におけるAβ蓄積の加速は、侵入症状と有意に関連していたが、回避または過覚醒サブスコアとは関連していなかった。

結論:

  • 感情処理に重要な脳領域における早期Aβ蓄積の速い速度は、特に侵入症状に対して、ストレス関連症状を発症しやすくする可能性がある。
  • Aβ病理の動的な変化は、情動調節と反芻に関与し、PTSD症状に寄与しているように見える。
  • 女性および既存の精神疾患を持つ個人は、これらの影響に対する感受性が高まっていることを示している。