人类遗传的RelB缺陷会损害对感染的先天性和适应性免疫力
Tom Le Voyer1,2,3, Majistor Raj Luxman Maglorius Renkilaraj1,2, Kunihiko Moriya1,2
1Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM UMR 1163, Paris 75015, France.
概括
人类遗传的RelB缺陷破坏了替代NF-κB通路,导致T细胞和B细胞免疫缺陷. 这导致对感染的敏感性增加,以及对I型干扰素的自身抗体增加.
科学领域:
- 免疫学 免疫学 免疫学
- 遗传学 遗传学 是一个
- 分子生物学分子生物学
背景情况:
- 病毒性瘤同类B (RELB) 蛋白质对免疫细胞的发育和功能至关重要.
- 在NF-κB信号通路的干扰与各种免疫缺陷有关.
研究的目的:
- 调查RELB中遗传性功能丧失变异对人类免疫反应的影响.
- 描述与RelB缺乏相关的临床和免疫学表型.
主要方法:
- 对两名没有关系的成年人具有RELB功能丧失变异的遗传分析.
- 对患者衍生的纤维细胞进行功能性测试,以评估NF-κB通路的激活.
- 对T和B细胞群体的流细胞计分析.
- 对于T和B细胞的体外分化试验.
- 评估自身抗体的产生.
主要成果:
- 患有RELB缺乏症的患者表现出淋巴毒素诱导的NFKB2mRNA和NF-κB2蛋白诱导功能受损,由RELBcDNA挽救.
- 对TNF和IL-1β的正规NF-κB通路反应保持不变.
- 观察到原始T细胞和记忆B细胞的比例减少.
- 损害了B细胞分化成IgG和IgA分泌细胞以及缺陷的IL-17A/F产生T细胞的发育.
- 患者对I型干扰素产生中和性自身抗体,表明胸膜上皮细胞功能障碍.
结论:
- 人类遗传的RelB缺陷破坏了替代NF-κB途径,导致T细胞和B细胞免疫缺陷.
- 这种缺陷使个体易患病毒,细菌和真菌感染.
- 这种情况与对I型干扰素的自身抗体和持续的免疫失调有关.
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