喘风险基因GSDMB促进了线粒体DNA诱导的ISG的表达
Tao Liu1, Julian Hecker1, Siqi Liu1
1Channing Division of Network Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA.
概括
加斯德明B (GSDMB) 通过调节cGAS-STING通路来促进与喘相关的炎症. 在气道细胞中,GSDMB增强了线粒体DNA诱导的干扰素刺激基因 (ISG) 表达.
科学领域:
- 免疫学 免疫学 免疫学
- 遗传学 遗传学 是一个
- 呼吸系统医学 呼吸系统医学
背景情况:
- 释放的线粒体DNA (mtDNA) 激活了cGAS-STING通路,诱导了喘中出现的炎症.
- 加斯德明B (GSDMB) 是一种主要的喘风险基因,但其在这种途径中的作用尚不清楚.
研究的目的:
- 调查GSDMB如何调节mtDNA激活的cGAS-STING通路以及随后的干扰素刺激基因 (ISG) 诱导在人类呼吸道上皮细胞中.
主要方法:
- 使用了qPCR,ELISA,凝电泳,共免疫沉和免疫光测试.
- 研究了GSDMB在BEAS-2B和初级正常人类支气管上皮细胞 (nHBEs) 中的作用.
- 分析了喘患者血中的mtDNA水平和GSDMB与RANTES表达的关联.
主要成果:
- GSDMB的过度表达增强了DNA诱导的干扰素 (IFN) 和ISG的表达;GSDMB的淘汰会削弱它.
- GSDMB与STING相互作用,促进其戈尔基转位和IRF3酸化.
- 喘患者的mtDNA拷贝数与乙氨基酸细胞计数相关,特别是在男性中.
结论:
- 在气道上皮细胞中,GSDMB通过mtDNA和poly ((dA:dT) 促进cGAS-STING通路的激活.
- 这导致ISG诱导的增强,有助于喘病原.
- GSDMB是关键的调节者,它将天生的免疫力与喘的遗传倾向联系起来.
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