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在急性髓性白血病中克服CD226相关的免疫逃避,使用CD38 CAR工程NK细胞

Luciana Melo Garcia¹, Achintyan Gangadharan², Pinaki Banerjee³

¹Department of Stem Cell Transplantation and Cellular Therapy, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA; Department of Medicine, Université Laval, Quebec City, QC G1V 0A6, Canada; Hematology-Oncology Service, CHU de Québec - Université Laval, Quebec City, QC G1V 0A6, Canada.

|January 4, 2025

概括

对急性髓性白血病 (AML) 的自然杀手 (NK) 细胞细胞毒性受到低CD226表达的损害. 工程化CAR38NK细胞可以克服这一问题,提供潜在的AML疗法.

科学领域:

免疫学免疫学免疫学
癌症生物学癌症生物学
细胞免疫学细胞免疫学

背景情况:

CD226对于自然杀手 (NK) 细胞介导的细胞毒性和通过与CD112和CD155的相互作用形成免疫突触至关重要,主要涉及白细胞功能相关-1 (LFA-1).
在急性髓性白血病 (AML) 患者中观察到NK细胞的CD226表达减少,可能导致免疫逃避.

研究的目的:

研究CD226在NK细胞监测AML中的作用.
为了评估化学抗原受体 (CAR) 工程NK细胞在克服AML中的CD226缺陷方面的疗效.

主要方法:

使用CRISPR-Cas9基因编辑来删除NK细胞中的CD226.
评估NK细胞突触形成,LFA-1招募和抗白血病活性.
通过针对CD38 (CAR38) 的仿制抗原受体设计NK细胞,并在AML模型中评估它们的功能.
研究了LFA-1阻断对CAR38NK细胞活性的影响.

主要成果:

通过CRISPR-Cas9调解的CD226删除导致LFA-1招募受损,免疫突触形成缺陷,NK细胞抗白血病活性降低.
改造的CAR38NK细胞表现出能够独立于CD226.2建立强大的免疫突触的能力.
阻断LFA-1部分抑制了CAR38NK细胞活性,其效果取决于AML细胞上的CD38表达水平.
有证据表明LFA-1和CAR38在免疫突触形成中具有并行和潜在的合作作用.

结论:

缺少CD226会影响NK细胞对抗AML的功能,从而导致免疫逃避.
CAR38工程NK细胞代表了一种有前途的治疗策略,以克服AML中CD226介导的免疫逃避.
LFA-1和CAR38信号之间的相互作用突显了AML免疫治疗中组合方法的潜力.

关键词:

在CAR-NK细胞中,CD226 是一个CD226 CD226 是一个CD226 CP: 癌症癌症癌症 CP: 免疫学免疫学在LFA-1中,LFA-1是指LFA-1.急性骨髓性白血病 (AML) 是一种急性骨髓性白血病.免疫突触的突触发生.

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