基礎科学と病態生理学
Kevin P Kotredes1, Ravi S Pandey1, Michael Sasner1
1The Jackson Laboratory, Bar Harbor, ME, USA.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 24, 2025
まとめ
研究者らは、IL1RAP遺伝子の役割を研究するために、late-onset Alzheimer病(LOAD)の新規マウスモデルを開発した。これらのモデルは、アルツハイマー病の病態機序の理解と新規治療薬の開発に有望である。
科学分野:
- 神経科学
- 遺伝学
- 免疫学
背景:
- late-onset Alzheimer病(LOAD)は数百万人に影響を与え、治療法は限られている。
- IL1RAP遺伝子はLOADにおけるアミロイド蓄積の重要なリスク因子である。
- IL-1ß受容体であるIL1RAPは、中枢神経系(CNS)における免疫シグナルを伝達する。
研究 の 目的:
- LOADの病態生理におけるIL1RAPの影響を調査すること。
- LOAD研究のための前臨床モデルを改善すること。
主な方法:
- 全身Il1rapノックアウトおよび神経特異的Il1rapb条件付きノックアウトの2つの新規マウス系統を作成した。
- ヒト関連遺伝子背景(APOEε4、Trem2*R47H、ヒト化App)を持つマウスモデルを利用した。
- 無菌感染および高脂肪食負荷を用いて、疾患表現型を悪化させた。
主要な成果:
- ヒトLOAD患者の遺伝子発現シグネチャを示すマウス系統を生成した。
- 末梢バイオマーカーである神経フィラメント軽鎖(NfL)の増加が観察され、神経損傷を示唆した。
- 炎症マーカーの上昇を伴う、刺激に対する正常な免疫応答を確認した。
結論:
- ヒト関連遺伝子背景を持つLOAD研究のための2つの新規マウスモデルを導入した。
- これらのモデルは、アルツハイマー病におけるIL1RAP機能の研究を容易にする。
- IL1RAPは神経変性疾患の潜在的な治療標的である。
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