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Updated: Aug 13, 2026

11:29
Isolation of Soluble and Insoluble PrP Oligomers in the Normal Human Brain
Published on: October 3, 2012
ヴァリン129を含むヒトプリオンタンパク質は,変異性CJD現象型の発現を防ぐ
Jonathan D F Wadsworth1, Emmanuel A Asante, Melanie Desbruslais
1Medical Research Council (MRC) Prion Unit and Department of Neurodegenerative Disease, Institute of Neurology, University College London, Queen Square, London WC1N 3BG, UK.
まとめ
コドン129のヒトプリオンタンパク質 (PrP) ゲノタイプは,牛のスポンジ状脳症 (BSE) プリオン病に影響を与える. メチオニン129は,変異のクレッツフェルト・ヤコブ病 (vCJD) 現象型に必要であり,バリン129は耐性を授与する.
科学分野:
- 神経科学は神経科学である.
- 分子生物学は分子生物学である.
- 病理学 パトロジー
背景:
- 変異型クレッツフェルト・ヤコブ病 (vCJD) は,ボウイン・スポンジ形式脳症 (BSE) プリオンに関連した致命的な神経変性疾患である.
- ヒトのプリオンタンパク質 (PrP) 遺伝子は,コドン129でメチオニン (M) またはバリン (V) との共通のポリモルフィズムを持っています.
研究 の 目的:
- ヒトのPrPコドン129ポリモルフィズムが,BSE由来プリオン感染症の伝播とフェノタイプにおける役割を調査する.
- 異なるPrPゲノタイプが,結果として発生するプリオン菌株と疾患の特徴に影響を及ぼすかどうかを判断する.
主な方法:
- メチオニン129 (PrP-129M) またはバリン129 (PrP-129V) でヒトPrPを発現するトランス遺伝子マウスは,BSEプリオンで接種された.
- ネズミの病気のフェノタイプ分析,インキュベーション期間,神経病理学,プリオン株のタイプ化を含む.
主要な成果:
- PrP-129Mのトランスジェニックマウスは,vCJDに似たフェノタイプを発達させた.
- PrP-129Vのトランスジェニックマウスは,特異なフェノタイプと,BSEプリオン伝播に対する重要な障壁を示し,サブパスでさえも.
- 人間のPrPのコドン129ポリモルフィズムが,BSEのプリオン感染後に異なるプリオン株の拡散を決定した.
結論:
- 人間のPrPコードン129遺伝子型は,BSE由来プリオン病のフェノタイプと伝染性の決定的な決定因子です.
- BSEプリオンによる初次および二次ヒト感染は,vCJDに加えて,散発的なCJDのようなまたは新しい形態を含む多様な臨床および分子フェノタイプにつながる可能性があります.
- これらの発見は,ヒトのプリオン病におけるプリオン菌株,宿主遺伝子型,および疾患の発現の複雑な相互作用を強調しています.
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