人类遗传的CCR2缺陷是多囊性肺病的基础
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
概括
单细胞化学因子受体C-C动机化学因子受体2 (CCR2) 的完全缺乏导致人类肺部疾病,包括肺气膜蛋白质和感染. 血液中高C-C动机连接体2 (CCL-2) 水平表明这种遗传状况.
科学领域:
- 免疫学
- 遗传学
- 肺病学
背景情况:
- 单细胞的招募对于宿主防御至关重要.
- 在C-C基因基因受体2 (CCR2) 中介单细胞迁移.
- 基因受体的遗传缺陷可能导致免疫功能障碍.
研究的目的:
- 研究CCR2在人类肺部疾病中的作用.
- 确定特定的儿童肺部和感染综合征的遗传基础.
- 为了确定CCR2缺乏的诊断标志物.
主要方法:
- 无法解释的肺部疾病和复发性感染的患者的基因测序.
- 单细胞信号传递和迁移的功能测试.
- 血液细胞群和细胞因子介导免疫的分析.
- 膜巨细胞群的评估.
主要成果:
- 在9名患有肺膜蛋白质病 (PAP) 和复发性感染的儿童中发现了自体衰退性,完全的CCR2缺乏症.
- 这种CCR2变体消除了CCL-2刺激的Ca2+信号和迁移.
- 患者表现出正常的血细胞子集和细胞因子反应,但膜巨细胞数量减少.
- 在所有受影响的个体中观察到血中CCL-2水平升高.
结论:
- 完全的CCR2缺乏是人体PAP,多囊性肺病和复发性感染的遗传原因.
- 肺部的CCL-2依赖单细胞迁移受损是观察到的病理原因.
- 血中高的CCL-2水平可以作为查的潜在诊断生物标志物.
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