纳米体导向的CEA准CAR T细胞消除胃肠癌异种移植
Zijie Feng1, Xuyao Zhang1, Zhicheng Peng1
1Department of Cancer Biology, Abramson Family Cancer Research Institute, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania.
Cancer immunology research
|May 29, 2025
概括
研究人员开发了针对胃肠道癌症 (GIC) 的新型CAR T细胞疗法. 在临床前模型中,VHHB30-CAR T细胞有效地消除了结肠直肠和胃瘤,为这些致命疾病提供了有前途的新治疗策略.
科学领域:
- 在瘤学瘤学.
- 免疫治疗是一种免疫疗法.
- 分子生物学分子生物学
背景情况:
- 胃肠道癌 (GICs) 是全球主要的健康负担,对转移性疾病的治疗选择有限.
- 目前用于高级GIC的治疗方法经常面临耐药性和疗效方面的挑战.
- 化学抗原受体 (CAR) T细胞疗法在血液性恶性瘤中取得了成功,但对于像GICs这样的固体瘤仍在发展.
研究的目的:
- 开发一种针对胃肠道癌症的新型CAR T细胞疗法.
- 识别和验证一个特定的抗原,并为GICs开发一个强大的CAR结构.
- 在GICs的临床前模型中评估开发的CAR T细胞疗法的疗效.
主要方法:
- 利用瘤选择的抗体和抗原检索系统来分离一个向癌胚抗原 (CEA) 的纳米体 (VHHB30).
- 设计了VHHB30-CAR T细胞 (CEACAR T细胞),并将第三代与第二代结构进行了比较.
- 在体外对胃癌和结直肠癌细胞系进行了细胞毒性评估.
- 在临床前的小鼠模型中评估了GIC异种移植的体内抗瘤活性.
主要成果:
- VHHB30 特别与 CEA 的 N 终端域结合.
- 在实验室中,CEACAR T细胞表现出CEA-依赖的细胞毒性对GIC细胞系.
- 与第二代细胞相比,第三代CEACAR T细胞表现出更高的抗瘤活性.
- 在体内研究表明,CEACAR T细胞完全根除了各种结肠直肠和胃瘤异位移植.
结论:
- VHHB30-CAR T细胞疗法是对抗胃肠道癌症的有效策略.
- 开发的CEACAR T细胞显示出在临床前环境中治疗GIC的重大前景.
- 这种方法突显了在体内无偏选的潜力,以发现有效的CAR T细胞结合剂用于固体瘤.
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