针对CD19和CD20的T细胞重定向治疗后,淋巴瘤中的序列抗原损失和分支演变
Johannes Duell1, Alexander M Leipold2, Silke Appenzeller3
1Department of Internal Medicine 2, University Hospital of Würzburg, Würzburg, Germany.
Blood
|November 17, 2023
概括
针对淋巴瘤中CD19和CD20的新型免疫疗法可能导致抗原损失,导致疾病复发. 了解这些复杂的进化途径对于改善这些先进治疗方法的患者结果至关重要.
科学领域:
- 血液学 血液学 血液学
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
背景情况:
- 化学抗原受体 (CAR) 向CD19的T细胞和向CD20的T细胞参与双特异性抗体 (双特异性) 已被批准用于B细胞非霍奇金淋巴瘤.
- 这些疗法的顺序使用呈现出一种新的临床范式.
研究的目的:
- 研究CD19和CD20定向免疫治疗对淋巴瘤克隆架构的影响.
- 了解在这些新的治疗策略下抵抗和复发的机制.
主要方法:
- 分析了从7名B细胞非霍奇金淋巴瘤患者的28个纵向采集的样本.
- 利用广泛的分析管道来评估遗传突变和抗原表达.
- 研究了T细胞耗尽和克隆进化对治疗的反应.
主要成果:
- 在80%的患有CD20 bispecs复发的患者中,鉴定出导致CD20损失的截断突变.
- 在CAR T细胞治疗后证实了CD19损失,其中有一例是连续的CD19和CD20损失.
- 观察到CD20表达的分支进化和空间异质性,CD20+亚克隆重新出现.
结论:
- 免疫疗法作为一个进化瓶,选择抗原损失变体.
- 复杂的进化途径,包括抗原损失和克隆异质性,是疾病进展的基础.
- 这些发现对于理解耐药机制和优化顺序免疫疗法策略至关重要.
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