CD155/PVR确定了Delta One T细胞对急性髓性白血病的向性
Sofia Mensurado1, Carolina Condeço1, Diego Sánchez-Martínez2,3,4,5
1Instituto de Medicina Molecular João Lobo Antunes, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal.
Blood
|March 4, 2024
概括
德尔塔1 T (DOT) 细胞通过识别自然杀手细胞受体连接体,有效地准急性髓性白血病 (AML). 肺血管抵抗 (PVR) 和AML细胞上的B7-H6表达是DOT细胞识别和消除的关键.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 细胞生物学 细胞生物学
背景情况:
- 复发或不耐药的急性髓性白血病 (AML) 是一个重大的治疗挑战.
- 使用Vδ1+ γδ T细胞 (DOT细胞) 的采用免疫疗法对AML治疗具有前景.
- DOT细胞识别AML细胞的精确分子机制尚未完全理解.
研究的目的:
- 研究自然杀手 (NK) 细胞受体连接体在Dot细胞对AML细胞的识别中的作用.
- 阐明DOT细胞介导的细胞毒性对AML的分子基础.
主要方法:
- 对NK细胞受体连接体表达的AML细胞系的查.
- 通过CRISPR介导的基因切除来评估连接体功能.
- 免疫学突触形成试验.
- 在初级AML样本中对PVR表达和DOT细胞疗效的相关性分析.
主要成果:
- 在AML细胞中,DNAM-1连接体 (CD155/PVR,CD112/nectin-2) 和NKp30连接体 (B7-H6) 呈现上调,但没有NKG2D连接体.
- PVR和B7-H6在DOT细胞针对AML中发挥着关键的,非冗余的作用.
- PVR和B7-H6对于DOT和AML细胞之间形成免疫突触至关重要.
- 主要AML样本上的PVR表达预测了DOT细胞的成功消除.
结论:
- 对AML的DOT细胞识别是由特定的NK细胞受体连接体,主要是PVR和B7-H6.6介导的.
- PVR和B7-H6对于有效的针对AML的DOT细胞免疫疗法至关重要.
- 在AML临床试验中,PVR表达水平可以作为DOT细胞治疗的预测生物标志物.
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