在三阴性乳腺癌中,黄金葡萄球菌的细胞系依赖内部化,持久性和免疫调节效应
Sima Kianpour Rad1,2, Runhao Li1,2, Kenny K L Yeo1,2
1Solid Tumour Group, Basil Hetzel Institute for Translational Health Research, The Queen Elizabeth Hospital, Central Adelaide Local Health Network, Woodville South, Adelaide, SA 5011, Australia.
Cancers
|September 27, 2025
概括
金黄色葡萄球菌侵入三阴性乳腺癌细胞,调节PD-L1表达,并可能影响免疫治疗反应. 针对这些瘤-细菌相互作用可能会提高癌症治疗的疗效.
科学领域:
- 微生物学 微生物学
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
背景情况:
- 三阴性乳腺癌 (TNBC) 具有侵略性,治疗选择有限.
- 免疫检查点抑制剂 (ICI) 在TNBC中表现出不一致的疗效.
- 与瘤相关的细菌可能会影响免疫治疗的结果.
研究的目的:
- 调查金黄色葡萄球菌的入侵和TNBC细胞中的细胞内持久性.
- 确定S. aureus是否调节TNBC中的PD-L1表达.
- 探索细菌感染在TNBC免疫信号传递中的作用.
主要方法:
- 评估了细菌吸收和持久性,使用流动细胞计,珍塔米辛保护试验,CFU量化和电子显微镜.
- 在S. aureus感染或TLR2连接剂治疗后评估PD-L1,TLR2和STAT1激活±IFN-γ.
- 使用了6个TNBC细胞系和一个非瘤源控制.
主要成果:
- 黄金菌被TNBC细胞内化,高吸收线显示出显著的细胞毒性和减少的增殖.
- 细菌的持久性各不相同,在一些TNBC系中持续超过7天.
- 与S. aureus结合的IFN-γ通过TLR2/STAT1轴在高吸收TNBC细胞中显著放大了PD-L1表达.
结论:
- 黄金菌侵入并持续存在于TNBC细胞内,调节免疫信号通路.
- 细菌存在影响PD-L1表达,这是一个关键的免疫检查点目标.
- 向瘤细菌相互作用是一个潜在的新策略,可以提高TNBC的免疫疗法疗效.
关键词:
在 PD-L1 表达式上.这就是STAT1信号.黄金葡萄球菌黄金葡萄球菌收费类受体2 (TLR2) 是一个收费类受体.细菌的持续性 细菌的持续性免疫检查点是一个检查点.免疫疗法 免疫疗法细胞内细菌是细胞内细菌.三重阴性乳腺癌 (TNBC) 是一种更多相关视频
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