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Updated: Jun 30, 2026

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通过CRISPR/Cas9系统建立一个STING缺陷的HepG2细胞系,并评估其对沙门氏菌复制的影响

Lanqing Sun¹, Kai Huang², Xuan Huang¹

¹Department of Laboratory Medicine Affiliated Hospital of Jiangnan University, Wuxi, Jiangsu, China.

Journal of pathogens

|September 20, 2024

概括

我们创建了一个缺少STING的细胞系来研究沙门氏菌Typhimurium感染. 缺陷增加了细菌复制和减少了免疫基因表达,为宿主-病原体相互作用提供了洞察力.

科学领域:

免疫学免疫学免疫学
微生物学微生物学
分子生物学分子生物学

背景情况:

沙门氏菌Typhimurium是一种食源性病原体,引起胃肠炎和全身性疾病.
干扰素基因刺激器 (STING) 是抗病毒免疫的关键,但它在细菌感染中的作用仍在争论中.

研究的目的:

使用CRISPR/Cas9.9建立一个STING缺陷的HepG2细胞系.
评估STING缺陷对沙门氏菌Typhimurium复制和宿主免疫反应的影响.

主要方法:

使用CRISPR/Cas9技术创建了一个STING淘汰的HepG2细胞系.
使用CCK-8试验评估了细胞活力和增殖.
在感染后分析了沙门氏菌的复制和I型干扰素相关的基因表达.

主要成果:

成功生成了一个缺少STING的HepG2细胞系.
与野生类型相比,STING缺乏的细胞显示出减少的增殖和增加的沙门氏菌Typhimurium复制.
在沙门氏菌感染后,STING缺乏细胞中抑制了I型干扰素基因表达 (IFNB1,ISG15).

结论:

一个缺少STING的细胞系成功构建.
在STING缺乏细胞中增加沙门氏菌Typhimurium复制突出了STING在控制细菌感染中的作用.
这项研究为进一步研究沙门氏菌与宿主相互作用提供了基础.

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