用Granzyme B向灭活动的探针来评估瘤对免疫治疗的反应
Muhammad Kazim1, Arghya Ganguly1, Sebastian M Malespini1
1Chemical Biology Laboratory, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, Maryland 21702, United States.
Journal of the American Chemical Society
|October 8, 2025
概括
研究人员开发了一种新的光学成像探针来检测抗瘤免疫力的关键指标, 这种工具可以对瘤的免疫反应进行早期评估,从而有助于免疫治疗的发展.
科学领域:
- 生物医学工程
- 分子成像
- 免疫学
背景情况:
- 免疫激活的分子成像对于开发新的免疫疗法至关重要.
- 在瘤大小发生变化之前检测免疫反应可以指导早期治疗策略.
研究的目的:
- 开发一种用于检测抗瘤免疫生物标志物的化学探针.
- 通过非侵入性光学成像进行免疫反应的早期评估.
主要方法:
- 设计和优化了基于灭活动的光学成像探测器 (Cy5-IEPCyaPhP-QSY21),以向B种子.
- 评估了复杂蛋白质体中的探针特异性,灵敏性和背景信号.
- 在小鼠瘤模型中评估体内和体外光信号.
主要成果:
- 探测器可在低静态度度下选择性地标记活性酶B.
- 在注射后不久,体内成像显示了granzyme B诱导的近红外光信号.
- 光信号与大酶B活性,CD8+细胞群和免疫治疗反应相关.
结论:
- 开发的探针是评估免疫媒介抗癌活性的有价值的化学工具.
- 不侵入式的光学成像可以追踪瘤对免疫治疗的反应.
- 这种方法有助于在癌症治疗中早期检测免疫激活.
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