人类RELA主导-阴性突变是I型干扰因子病的基础,具有自身炎症和自身免疫力
Kunihiko Moriya1, Tomohiro Nakano1, Yoshitaka Honda2,3,4
1Department of Pediatrics, Tohoku University Graduate School of Medicine, Sendai, Japan.
The Journal of experimental medicine
|June 5, 2023
概括
在NF-κB通路中的遗传缺陷,特别是RELA突变,导致一种新的自身炎症性疾病. 这种情况导致I型干扰素的过度产生,引发全身自身免疫和自身炎症症状.
科学领域:
- 免疫学 免疫学 免疫学
- 遗传学 遗传学是一种遗传学.
- 分子生物学分子生物学
背景情况:
- 影响核因子-kappa B (NF-κB) 途径的先天性错误与各种人类疾病有关.
- 由于RELA中异性生殖基因突变引起的RELA哈普洛缺陷,导致慢性粘膜皮肤和自身免疫性血液问题.
研究的目的:
- 研究来自五个家庭的六名患者的新型自身炎症性疾病的遗传基础和临床表现.
- 阐明与特定RELA突变相关的观察到的自身炎症和自身免疫表型背后的分子机制.
主要方法:
- 六名患有不明原因的自身炎症和自身免疫症状的患者的基因分析.
- 在患者衍生细胞中评估RelA蛋白表达和功能.
- 对托尔类受体 (TLR) 通路激活的分析,包括TLR7和MYD88mRNA表达.
- 在患者白细胞中量化I/III型干扰素 (IFN) 和干扰素刺激的基因表达.
主要成果:
- 所有六名患者都是异合体的新型RELA突变,位于3'基因段,导致过早停止密码.
- 截断,功能丧失的RelA蛋白被表达,对NF-κB通路调节表现出主导负效应.
- 在血细胞状树突细胞 (pDC) 和其他髓状细胞中观察到高的TLR7和MYD88mRNA水平.
- 来自患者的白细胞显示了增强的TLR7驱动型I/III型IFN的分泌和增加的干扰素刺激的基因表达.
结论:
- 在RELA中的主导负基因突变会导致一种新型I型干扰性病变.
- 这种情况的特点是系统性自身炎症和自身免疫表现,由过度的I型干扰素生产驱动.
- 由于TLR7信号失调,这种表型可能是由常见的TLR连接体触发的.
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