17q21 变种 扰乱 粘膜 主体 防御 在 儿童 喘
Constanze A Jakwerth1,2, Markus Weckmann2,3,4,5, Sabina Illi2,6,7
1Center of Allergy and Environment (ZAUM), Technical University and Helmholtz Center Munich, Munich, Germany.
American journal of respiratory and critical care medicine
|December 8, 2023
概括
儿童喘的17q21遗传风险因子增加了GSDMB的表达,导致细胞性免疫反应和干扰素 (IFN) 信号减少. 这种机制解释了这种遗传倾向的儿童对呼吸道病毒感染的敏感性增加.
科学领域:
- 免疫学 免疫学 免疫学
- 遗传学 是一个遗传学.
- 呼吸系统医学 呼吸系统医学
背景情况:
- 17q21位点是儿童喘的主要遗传风险因素.
- 这种位置与对病毒感染和疾病进展的敏感性增加有关.
- 了解潜在的生物机制对于开发有针对性的干预措施至关重要.
研究的目的:
- 为了确定与17q21位点相关的特定生物点.
- 研究17q21基因型如何影响儿童的病毒易感性.
- 为了阐明调解喘风险的分子途径,与17q21位点相关.
主要方法:
- 在ALLIANCE队列中,对261名儿童 (健康,学龄前喘息,喘) 的鼻毛刷样本进行全基因组转录组分析.
- 对于17q21风险单核酸多态 (SNP) 的基因定型 rs72163891.
- 在鼻分泌物中测量干扰素 (IFN) 蛋白质水平,使用高灵敏度中等尺度技术.
主要成果:
- 17q21风险等位基因显著增加了粘膜GSDMB表达,以基因型和喘/喘息表型依赖的方式.
- 增加的GSDMB表达与激活1型亲炎性细胞性免疫特征相关,包括IFN-γ和与自然杀手相关的基因.
- 在mRNA和蛋白质水平上观察到1型和3型IFN表达特征的同时减少.
结论:
- 由17q21风险等位基因驱动的增加的GSDMB表达促进了细胞性免疫反应,并损害了呼吸道免疫能力.
- 这种GSDMB介导的气道细胞死亡和改变的IFN签名有助于在生命早期增加对呼吸道病毒感染的脆弱性.
- 这些发现表明,GSDMB是减轻与17q21位点相关的喘风险的新疗法标.
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