LINC01002 作为一个ceRNA,通过菌miR-4324来调节FRMD8,以促进COVID-19的发展
Xinyi Kong1, Qinjin Wang1, Xumeng Wang1,2
1Department of Laboratory Medicine, The Eighth Affiliated Hospital, Sun Yat-sen University, Shenzhen, 518033, China.
Virology journal
|May 11, 2024
概括
通过调节LINC01002-miR-4324-FRMD8轴,SARS-CoV-2核体 (N) 蛋白显著抑制干扰素-β (IFN-β) 的诱导. 这一发现为开发针对SARS-CoV-2感染的早期干预疗法提供了新的途径.
科学领域:
- 病毒学 病毒学
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
背景情况:
- 严重急性呼吸系统综合征冠状病毒-2 (SARS-CoV-2) 使用策略来逃避宿主I型干扰素 (IFN) 反应.
- 虽然已知非结构性和辅助性蛋白质在免疫逃避中的作用,但结构性蛋白质诱导免疫逃避的机制尚不清楚.
研究的目的:
- 研究SARS-CoV-2结构蛋白在逃避I型IFN介导免疫的作用.
- 阐明SARS-CoV-2结构蛋白干扰IFN-β诱导的分子机制.
主要方法:
- 人类膜上皮细胞 (A549) 被刺激并被SARS-CoV-2结构蛋白表达等离子体 (N,S,M,E) 感染.
- 用RT-qPCR,ELISA和RNA测序 (RNA-Seq) 来识别对IFN-β和相关基因具有最强抑制作用的蛋白质.
- 使用生物信息学数据库和单细胞测序数据构建并验证了竞争性内源RNA (ceRNA) 网络和lncRNA-miRNA-mRNA轴.
主要成果:
- 在SARS-CoV-2核体 (N) 蛋白中,IFN-β诱导的抑制是最显著的.
- RNA-Seq确定了858个与N蛋白抑制IFN-β相关的不同表达的基因.
- 确定LINC01002-miR-4324-FRMD8轴是N蛋白介导免疫逃避中的关键参与者,N蛋白逆转PIC诱导的表达变化.
结论:
- 在SARS-CoV-2中,N蛋白抑制IFN-β的诱导,通过作为ceRNA,菌miR-4324来调节FRMD8mRNA.
- 这项研究为SARS-CoV-2免疫逃避机制提供了新的见解,可能引导早期干预策略和药物开发.
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