针对固体癌症的CAR T细胞治疗,通过向PD-L1来攻击瘤和免疫抑制细胞
Yan Luo1,2, Martha E Gadd1, Yaqing Qie1
1Regenerative Immunotherapy and CAR-T Translational Research Program, Mayo Clinic, Jacksonville, FL, USA.
Molecular therapy. Oncology
|November 5, 2024
概括
一种针对PD-L1的新型仿真抗原受体 (CAR) T细胞疗法对固体瘤显示出希望. 这种疗法,MC9999,有效地向瘤细胞和免疫抑制细胞,在临床前模型中展示了广泛的适用性.
科学领域:
- 免疫治疗是一种免疫疗法.
- 在瘤学瘤学.
- 细胞疗法细胞疗法
背景情况:
- 化学抗原受体 (CAR) T细胞疗法在固体瘤中面临挑战,原因是抗原稀缺性和免疫抑制性瘤微环境 (TME).
- 编程死亡连接体1 (PD-L1) 是一个关键的免疫逃避标,由TME内的瘤和免疫抑制细胞调节.
- 在各种固体恶性瘤中,PD-L1代表了克服免疫抑制的普遍目标.
研究的目的:
- 开发和评估一种新的PD-L1向的CAR T细胞疗法 (MC9999) 用于固体瘤.
- 评估MC9999CAR T细胞对TME内的瘤细胞和免疫抑制细胞的疗效.
- 验证MC9999作为各种固体癌症的治疗策略的潜力.
主要方法:
- 开发一种人性化的抗PD-L1单克隆抗体,用于CAR构造.
- 设计用于瘤和免疫抑制细胞的双重向的MC9999 CAR T细胞的工程.
- 在乳腺癌,肺癌,黑色素瘤和多种质母细胞瘤 (GBM) 的临床前模型中对MC9999 CAR T细胞进行体内测试.
- 评估MC9999 CAR T细胞对各种免疫抑制细胞 (微质,M2巨细胞) 和患者衍生的瘤相关巨细胞的细胞毒性.
主要成果:
- 在多个固体瘤模型中,MC9999 CAR T细胞表现出一致的抗原特异性抗瘤效应.
- 静脉注射MC9999CAR T细胞导致了内GBM瘤的根除,这表明血脑屏障透.
- MC9999 CAR T细胞对免疫抑制细胞,包括微质细胞和M2巨细胞表现出强烈的细胞分解活性.
- 细胞毒性被证实对从GBM瘤中分离出来的与原发性瘤相关的巨细胞.
- 使用来自癌症患者的CAR-T细胞验证双重向概念.
结论:
- MC9999 CAR T细胞疗法是向固体瘤中PD-L1的有希望的方法.
- MC9999的双重向能力有效地针对瘤细胞和免疫抑制TME.
- MC9999为开发下一代CAR T细胞疗法来挑战固体癌症提供了坚实的基础.
相关概念视频
Tumor Immunotherapy
484
Immunotherapy is a treatment that boosts or manipulates the immune system to fight diseases, including cancer. For instance, by stimulating an immune response through vaccinations against viruses that cause cancers, like hepatitis B virus and human papillomavirus, these diseases can be prevented. Nonetheless, some cancer cells can avoid the immune system due to their rapid mutation and division. The immune response to many cancers involves three phases: elimination, equilibrium, and escape.
484
Targeted Cancer Therapies
7.5K
The targeted cancer therapies, also known as “molecular targeted therapies,” take advantage of the molecular and genetic differences between the cancer cells and the normal cells. It needs a thorough understanding of the cancer cells to develop drugs that can target specific molecular aspects that drive the growth, progression, and spread of cancer cells without affecting the growth and survival of other normal cells in the body.
There are several types of targeted therapies against...
There are several types of targeted therapies against...
7.5K


