人間に遺伝するCCR2欠乏症は,進行性多囊性肺疾患の根底にある
Anna-Lena Neehus1, Brenna Carey2, Marija Landekic3
1Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Necker Hospital for Sick Children, Paris 75015, France; Paris Cité University, Imagine Institute, Paris 75015, France.
Cell
|December 29, 2023
まとめ
単細胞キモカイン受容体C-Cモチーフキモカイン受容体2 (CCR2) の完全な欠乏は,肺アルベオラタンパク質症および感染症を含むヒトの肺疾患を引き起こす. 高血C-Cモチーフリガンド2 (CCL-2) レベルは,この遺伝的状態を示す.
科学分野:
- 免疫学
- 遺伝学
- 肺科
背景:
- 単細胞の徴募は 宿主の防御に不可欠です
- C-Cモチーフケモカイン受容体2 (CCR2) は単細胞移動を媒介する.
- ケモカイン受容体の遺伝的欠陥は 免疫機能障害を引き起こす可能性があります
研究 の 目的:
- ヒトの肺疾患におけるCCR2の役割を調査する.
- 特定の小児肺感染症症候群の 遺伝的根拠を特定するために
- CCR2欠乏症の診断マーカーを確立する
主な方法:
- 原因不明の肺疾患と再発性感染症の患者の遺伝子解析
- モノサイトシグナル伝達と移動の機能的測定
- 血液細胞集団とサイトカイン媒介免疫の分析
- アルベオラマクロファージ群の評価
主要な成果:
- 9人の小胞膜タンパク質症 (PAP) と再発性感染症の小胞膜タンパク質症 (CCR2) 欠乏症を特定した.
- CCR2変種は,CCL-2刺激によるCa2+シグナル伝達と移行を廃止した.
- 患者は正常な血球サブセットとサイトカイン反応を示したが,アルベオラマクロファージの数は減少した.
- すべての患者にCCL-2の血中濃度の上昇が観察された.
結論:
- 完全なCCR2欠乏症は,ヒトにおけるPAP,多囊性肺疾患,および再発性感染症の遺伝的原因である.
- 肺へのCCL2依存単細胞移動の障害が,観察された病理の根底にある.
- 高血中CCL-2レベルは,スクリーニングのための潜在的な診断バイオマーカーとして機能します.
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