膀癌中的肠道BCG诱导了对SARS-CoV-2的天生的免疫反应
Renate Pichler1, Gabriel Diem2, Hubert Hackl3
1Department of Urology, Comprehensive Cancer Center Innsbruck, Medical University of Innsbruck, Innsbruck, Austria.
Frontiers in immunology
|July 31, 2023
概括
膀癌的静脉BCG治疗没有诱导对SARS-CoV-2的适应性免疫力. 然而,它增强了先天性免疫细胞,促进了对病毒的反应中训练免疫 (TI) 细胞因子的产生.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 传染性疾病 传染性疾病
背景情况:
- Calmette-Guérin (BCG) 是一种标准的辅助疗法,用于高风险的非肌肉侵入性膀癌 (NMIBC).
- 已知BCG可以调节先天性和适应性免疫反应,这对训练免疫 (TI) 有潜在的影响.
- TI增强了先天的免疫反应,提供了对呼吸道病毒等感染的保护.
研究的目的:
- 调查NMIBC患者的肠道BCG灌注是否可以诱导针对SARS-CoV-2的适应性或先天性免疫反应.
- 评估BCG对训练免疫力的影响及其与SARS-CoV-2的潜在交叉反应.
主要方法:
- 在BCG治疗前和治疗期间对NMIBC患者的血清和周围血液单核细胞 (PBMC) 的分析.
- 测量SARS-CoV-2中和抗体和病毒特异性T细胞 (IFNγ ELISpot).
- 通过细胞因子表达 (IL-1β,IL-6,TNFα) 和针对表观遗传变化的ATAC测序来评估先天免疫反应.
主要成果:
- 没有检测到SARS-CoV-2中和抗体或反应性T细胞,表明没有诱导适应性免疫力.
- 在BCG治疗后,IL-1β,IL-6和TNFα的mRNA和蛋白质水平显著增加,与训练有素的免疫力相一致.
- 在BCG治疗期间观察到TI基因附近的基因组区域 (例如TLR2,IGF1R) 的可访问性增加.
结论:
- 针对NMIBC的静脉BCG治疗不会诱导对SARS-CoV-2的适应性免疫力.
- 重复的BCG灌注增强了先天性免疫细胞,促进了训练有素免疫细胞因子的产生,这些细胞可能会对SARS-CoV-2作出反应.
- 对于BCG对训练免疫力的作用,需要进一步研究其在抗感染能力方面的潜在应用范围.
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