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来自黄金葡萄球菌 (Staphylococcus aureus) 的免疫调节剂的表征,用于三阴性乳腺癌的原始免疫治疗

Chin-Chih Liu¹, Matthew Wolf¹, Ruth Ortego¹

¹Cleveland Clinic, Genomic Medicine Institute, Lerner Research Institute, 9500 Euclid Avenue NE50, Cleveland, OH, 44195, USA.

Scientific reports

|January 8, 2024

概括

黄金葡萄球菌α-hemolysin通过招募免疫细胞来增强三阴性乳腺癌的免疫疗法. 这种方法可以改善对当前疗法的耐药性患者的治疗反应.

科学领域:

在瘤学瘤学.
免疫学免疫学免疫学
微生物学微生物学

背景情况:

免疫检查点封锁 (ICB) 改变了三阴性乳腺癌 (TNBC) 治疗.
由于缺乏瘤透淋巴细胞 (TIL) 或PD-L1表达,许多TNBC对ICB没有反应.

研究的目的:

调查黄金葡萄球菌是否可以使TNBC对ICB敏感.
为了探索来自S. aureus的α-hemolysin (HLA) 的免疫调节作用.

主要方法:

在临床前的TNBC模型中注射S. aureus消耗的培养基和纯化的α-hemolysin (HLA).
分析了TILs,CD8+ T细胞扩张,PD-L1表达,瘤生长,亡和烧亡标志物 (GSDME裂变).
内HLA和ICB的联合治疗.

主要成果:

黄金色介质和HLA招募了TILs并抑制了瘤生长.
HLA增加了CD8+ T细胞和PD-L1表达,延迟了瘤生长,并诱导了亡.
HLA治疗导致GSDME在瘤细胞中的分裂和CD8+T细胞扩张.
内HLA与ICB相结合显示出比单独使用ICB更高的疗效.

结论:

黄金葡萄球菌α-hemolysin具有强大的免疫调节特性.
在TNBC中对ICB进行增强反应,对瘤进行内HLA的注射是一种潜在的策略.

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