カルシネウリンでコロカライズされた免疫フィリンFKBPの脳密度が高い
J P Steiner1, T M Dawson, M Fotuhi
1Department of Neuroscience, Johns Hopkins University School of Medicine.
Nature
|August 13, 1992
まとめ
サイクロフィリンやFKBPのような免疫フィリンは,免疫抑制剤と相互作用します. これらの薬は,イムノフィリン複合体経由でカルシヌーリン・フォスファテーゼの活性を阻害することによって,脳の機能に影響を与える可能性があります.
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.
- 薬理学 薬理学とは
背景:
- 免疫フィリン (cyclophilin, FKBP) は免疫抑制剤 (cyclosporin A, FK506) に結合し,その作用を媒介する.
- カルシヌーリンは,Ca2+) に依存するフォスファタゼであり,これらの薬物-免疫フィリン複合体を結合し,薬物効果を媒介することを示唆しています.
- ドロソフィラNINAAとサイクロフィリンと,脳内の高FKBPmRNAとのホモロジーは,免疫フィリンが神経系における役割を示唆している.
研究 の 目的:
- ネズミの脳における免疫フィリンとカルシーヌーリンの生理学的関連性を調査する.
- FK506とサイクロスポリンAが,脳組織とPC12細胞におけるタンパク質のリン酸化に及ぼす影響を決定する.
主な方法:
- ネズミの脳における量化FKBPおよびmRNAレベル.
- FKBP,mRNA,およびcalcineurin.の地域的局所化を評価しました.
- 薬物治療後の脳組織とPC12細胞におけるタンパク質のリン酸化を測定した.
主要な成果:
- ネズミの脳は,FKBPとmRNAの非常に高いレベルを示しています.
- 脳内のFKBPとmRNAの分布は,カルシネウリンの分布を反映している.
- 低濃度のFK506とサイクロスポリンAは,脳とPC12細胞におけるタンパク質のリン酸化を高めます.
結論:
- 脳内のカルシヌーリンと免疫フィリンとの間には生理学的つながりがあります.
- FK506とサイクロスポリンAは,イムノフィリン複合体を通してカルシヌーリン・フォスファターゼの活性を抑制する可能性が高い.
- これらの発見は,免疫抑制薬が神経機能にどのように影響するかのメカニズムを示唆しています.
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