针对B细胞成熟抗原的第三代化学抗原受体T细胞的治疗潜力,用于治疗多发性髓瘤
Punchita Rujirachaivej1, Teerapong Siriboonpiputtana2, Piriya Luangwattananun3,4
1Graduate Program in Clinical Pathology, Department of Pathology, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand.
Clinical and experimental medicine
|April 29, 2024
概括
与现有的CAR2疗法相比,一种新的第三代抗BCMA CAR3 T细胞疗法在治疗多发性骨髓瘤 (MM) 中显示出更高的疗效. 这种先进的CAR-T细胞治疗提供了增强的细胞毒性活性,并有可能改善复发性/耐药性MM患者的治疗结果.
科学领域:
- 血液学恶性瘤是什么
- 免疫治疗是一种免疫疗法.
- 癌症生物学 癌症生物学
背景情况:
- 多发性骨髓瘤 (MM) 是一种由恶性血细胞驱动的不可治愈的血液癌症.
- 目前的标准疗法面临由于治疗耐药性的挑战.
- 现有的针对B细胞成熟抗原 (BCMA) 的CAR T细胞疗法有希望,但需要进一步优化以获得持续的反应.
研究的目的:
- 开发和评估一种新型的第三代抗BCMA CAR T细胞疗法 (抗BCMA-CAR3) 治疗多发性骨髓瘤.
- 为了比较抗BCMA-CAR3 T细胞与第二代抗BCMA CAR T细胞 (抗BCMA-CAR2) 的疗效.
- 评估新的CAR-T细胞结构的细胞毒性活动和瘤根除能力.
主要方法:
- 开发第三代抗BCMA CAR T 细胞 (抗BCMA-CAR3),利用完全人类的scFv,CD8链,CD28跨膜域,CD28和4-1BB共刺激域以及CD3ζ信号域.
- 使用lentiviral技术生成修饰的T细胞.
- 在体外比较抗BCMA-CAR3和抗BCMA-CAR2T细胞对表达BCMA的多发性髓瘤细胞系的疗效 (KMS-12-PE和NCI-H929).
主要成果:
- 与抗BCMA-CAR2 T细胞相比,抗BCMA-CAR3 T细胞对表达BCMA的细胞具有显著更高的细胞毒性活性.
- 在10:1的效应因子与点比率下,抗BCMA-CAR3 T细胞诱导了75.5%的NCI-H929细胞溶解,而抗BCMA-CAR2 T细胞的溶解率为56.7% (p=0.0023).
- 12天后,抗BCMA-CAR3 T细胞几乎根除了BCMA阳性细胞 (4.1%的存活率),而抗BCMA-CAR2 T细胞剩下36.8%的存活率.
结论:
- 与第二代相比,第三代抗BCMA-CAR3 T细胞在消除低和高BCMA表达多发性骨髓瘤细胞方面表现出更高的疗效.
- 抗BCMA-CAR3 T细胞的增强细胞毒性特征表明它们有可能成为复发性/耐药性多发性髓瘤的先进治疗选择.
- 这些发现支持进一步的临床研究抗BCMA-CAR3 T细胞在化学抗原受体T (CAR-T) 治疗中.
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