使用基于Siglec-9的化学开关受体准与瘤相关的酸提高了工程T细胞的抗瘤效率
Vasyl Eisenberg1, Shiran Hoogi1, Erel Katzman1
1Laboratory of Tumor Immunology and Immunotherapy, The Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat Gan, Israel.
Cancer immunology research
|July 22, 2024
概括
癌细胞通过超化逃避免疫检测,这会通过Siglec-9.9损害T细胞功能. 研究人员用Siglec-9模拟开关受体 (CSR) 设计了T细胞,以增强抗瘤活性,提高癌症免疫治疗潜力.
科学领域:
- 免疫学 免疫学 免疫学
- 癌症生物学 癌症生物学
- 生物技术是生物技术.
背景情况:
- 癌细胞通过异常糖化等机制逃避免疫监测.
- 瘤微环境中的干扰因子 (IFNγ) 诱导癌细胞的过化.
- 过化可以导致T细胞效应因子功能的减少,可能是通过像Siglec-9.9这样的受体.
研究的目的:
- 调查IFNγ诱导的超化在癌症免疫逃避中的作用.
- 探索Siglec-9作为T细胞检查点分子及其对T细胞功能的影响.
- 开发针对高化瘤的新型工程T细胞,以改善癌症免疫疗法.
主要方法:
- 在使用IFNγ的癌细胞系中诱导超化.
- 对T细胞上的Siglec-9表达和功能的分析.
- 通过CRISPR/Cas9基因编辑,在人类T细胞中敲除Siglec-9.
- 基于Siglec-9的嵌合式开关受体 (CSR) 的设计和制造.
- 在异种移植模型中评估工程T细胞功能 (细胞因子分泌,激活标记物) 和抗瘤活性.
主要成果:
- 在各种癌症细胞系中,IFNγ诱导α2,6过化.
- 锡格莱克-9+ T 细胞表现出减少的效应器功能;锡格莱克-9 淘汰会增强主要的 T 细胞功能.
- Siglec-9 CSR转换的T细胞显示激活和细胞因子生产的增加.
- 具有Siglec-9 CSRs的工程T细胞在体内显示出显著的抗瘤疗效.
结论:
- 由IFNγ诱导的瘤超化,代表了通过Siglec-9.9通过免疫规避的机制.
- 用工程T细胞向Siglec-9,例如那些表达Siglec-9 CSRs的T细胞,可以克服这种逃避.
- 这种方法为增强基于工程T细胞的癌症治疗提供了一个有希望的策略.
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