皮肤人类乳头瘤病毒E6损害了cGAS-STING通路
Emily Tolbert1, Dalton Dacus1, Rose Pollina1
1Division of Biology, Kansas State University, Manhattan, KS 66506, USA.
bioRxiv : the preprint server for biology
|December 16, 2024
概括
贝塔类人类乳头瘤病毒 (β-HPVs) 损害了cGAS-STING免疫路径. 这使得β-HPV 8 E6能够通过逃避基因组不稳定的天生的免疫反应来促进皮肤癌细胞的增殖.
科学领域:
- 病毒学 病毒学
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
背景情况:
- 贝塔类人类乳头瘤病毒 (β-HPV) 是双链DNA病毒,与皮肤癌有关.
- β-HPV E6表达增加了微核,这通常会触发先天性免疫反应.
- 矛盾的是,β-HPV 8 E6促进了细胞的增殖,而不是细胞的消除.
研究的目的:
- 调查β-HPV 8 E6在诱导微核的同时促进增殖的机制.
- 为了测试β-HPV 8 E6减弱干扰素基因 (cGAS-STING) 循环GMP-AMP合成酶刺激通路的假设.
主要方法:
- 用pLVX-GFP等离子体刺激细胞.
- 免疫块实验以评估cGAS-STING通路的激活.
- 用RNA测序来分析天生的免疫基因表达.
- 显微镜观察cGAS对微核的招募.
主要成果:
- β-HPV 8 E6降低了cGAS-STING通路激活的幅度和强度.
- 对cGAS-STING通路的损伤是STING酸化下游最显著的.
- RNA测序表明β-HPV 8 E6.通过β-HPV降低其他先天免疫通路的调节.
- 观察到cGAS被招募到β-HPV 8 E6诱导的微核中.
结论:
- β-HPV 8 E6减弱了cGAS-STING天生的免疫反应,允许基因组不稳定的细胞的增殖.
- 这种免疫逃避机制可能会导致β-HPV感染的流行.
- 了解这种相互作用对于制定针对β-HPV相关皮肤癌的策略至关重要.
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