基礎科学と病態生理
Dorea P Jenkins1, Laura Davis1, Jennifer Belk1
1Medical University of South Carolina, Charleston, SC, USA.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 24, 2025
まとめ
サウスカロライナ州では、アルツハイマー病(AD)および前頭側頭葉変性症(FTLD)-tauの早期発症率が全国平均よりも高いことが示されています。神経病理学的研究により、特定の神経変性疾患が州の特定の地域にクラスターしていることが明らかになりました。
科学分野:
- 神経病理学;神経変性疾患;公衆衛生疫学
背景:
- サウスカロライナ州では、アルツハイマー病(AD)および関連認知症(ADRD)の有病率が高く、122,000人以上が罹患しています。地理的マッピングにより、認知症症例の不均一な分布が明らかになり、特定の地域での集中が示唆されています。
研究 の 目的:
- 神経病理学的検査を通じてサウスカロライナ州の認知症の原因を定義すること。さまざまなADRDタイプの有病率を決定し、全国平均と比較すること。州内の特定の神経変性疾患の地理的クラスターを調査すること。
主な方法:
- 343例の剖検脳の精密組織学的検査。H&E、Bielschowsky、および主要タンパク質(Abeta、tau、alpha-synuclein、p62、p-TDP43)の免疫染色を含む染色パネルを使用しました。診断は郵便番号レベルにマッピングされ、認定された神経病理学者によってレビューされました。
主要な成果:
- 症例の43.1%がADであり、そのうち20.3%は早期発症(通常の5-10%よりも高い)でした。前頭側頭葉変性症(FTLD)-tau(63.6%)およびFTLD-TDP(26.4%)は、通常よりも一般的でした。多系統萎縮症はより高い割合で発生しました。純粋なADはまれで、ほとんどのAD症例は他の神経変性疾患と併存していました。診断の地理的クラスターが観察されました。
結論:
- サウスカロライナ州では、早期発症ADおよびFTLD-tauの発生率が高いことが示されています。特定の神経変性疾患は、州内の特定の地理的地域にクラスター化する傾向があります。現在進行中の全ゲノムシーケンシングは、観察された診断パターンに寄与する遺伝子変異を特定することを目的としています。
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