パーフォリン遺伝子の欠陥が家族性血細胞性リンパヒスティオサイトーシトーシスに起因する
S E Stepp1, R Dufourcq-Lagelouse, F Le Deist
1Department of Pathology and the Graduate Program in Immunology, University of Texas Southwestern Medical School, Dallas, TX 75235, USA.
まとめ
家族性血球性リンパヒスティオサイトーシトーシス (FHL) は,重度の免疫疾患である. パーフェルリン遺伝子の遺伝的欠陥は,染色体10q21-22に関連したFHLを引き起こし,細胞毒性の活性を低下させます.
科学分野:
- 免疫学 免疫学とは
- 遺伝学 遺伝学とは
- 細胞生物学 細胞生物学
背景:
- ファミリアル・ヘモファゴサイトリンパヒスティオサイトーシトーシス (FHL) は,まれで致死的な自己相性後退性免疫疾患である.
- 制御不能のT細胞とマクロファージの活性化に伴い,過剰なサイトカイン生成が伴う.
- FHLは9q21.3-22,10q21-22および他の領域にリンクされた局所を持つ遺伝的異質性を表しています.
研究 の 目的:
- 10q21-22局所に関連したFHLの遺伝的基礎を調査する.
- FHLのこの特定の形態におけるパーフェルリン遺伝子の役割を決定する.
主な方法:
- FHLロケーションを特定するための遺伝的リンク分析.
- FHL患者におけるパーフェルリン遺伝子のコーディング領域の配列決定.
- リンパ球の細胞毒性活性の評価.
- リンパ球粒子のパーフォーリン発現に対する免疫抑制.
主要な成果:
- 10q21-22に関連したFHL患者8人を研究した.
- 4人の患者はホモジゴス無意味変異を有し,4人の患者は,パーフェリン遺伝子のミスセンス変異を有していた.
- 患者のリンパ球は欠陥のある細胞毒性活性を示した.
- 免疫ステーリングは,リンパ球粒子のパーフォーリンが有意に減少した,または存在しないことを示しました.
結論:
- パーフォリン遺伝子の欠陥は,10q21-22の場所に関連したFHLの原因です.
- パーフォリンは,標的細胞溶解を含む細胞毒性エフェクター機能に不可欠です.
- パーフォリン媒介経路は,細胞免疫応答の調節に不可欠である.
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