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TNF-α和IFN-γ不同调节AML细胞对CD70抗体介导的细胞毒性的敏感性

Monika Sponheimer^1,2, Kieron White^1,2, Michelle Ulrich³

¹Department of Medicine III, University Hospital LMU Munich, Munich, Germany.

Journal for immunotherapy of cancer

|December 4, 2025

概括

CD70是急性髓性白血病 (AML) 免疫治疗的有希望的标. 然而,干扰素- (IFN-γ) 可以通过调节HLA分子来诱导耐药性,因此需要组合策略来进行有效的治疗.

科学领域:

免疫学和癌症治疗学
分子生物学和遗传学
血液学血液学血液学

背景情况:

针对急性髓性白血病 (AML) 开发免疫疗法是具有挑战性的,因为需要特定的向抗原,以避免在向外的白血病毒性.
CD70在AML散体和白血病干细胞上表达,在健康细胞上表达有限,使其成为潜在的免疫治疗点.

研究的目的:

评估CD70作为自然杀手细胞 (NK) 基免疫疗法在AML中的点.
研究细胞因子对CD70表达和NK细胞介导的细胞毒性的影响.

主要方法:

在使用多参数流细胞计的初级AML样本中评估CD70表面表达.
在AML模型中通过抗体依赖细胞细胞毒性 (ADCC) 试验分析了糖工程抗CD70抗体 (SEA-CD70) 的细胞毒性能力.
研究了细胞因子对CD70表达和ADCC的影响,使用来自激活T细胞和重组细胞因子的条件介质.

主要成果:

CD70在很大一部分初级AML细胞上表达,在复发时表达一致.
SEA-CD70在体外和体内对AML细胞表现出强大的剂量依赖性细胞毒性,与CD70水平相关.
瘤坏死因子-α (TNF-α) 上调了CD70,增强了ADCC,而干扰素- (IFN-γ) 通过增加NK抑制受体连接体 (HLA-ABC,HLA-E) 来降低ADCC,这表明一种可诱导的抗性机制.

结论:

CD70是基于NK细胞的AML免疫治疗的可行的标.
在AML细胞上,IFN-γ诱导的HLA分子的升高调节赋予了ADCC的抵抗力,突出了免疫逃生机制.
组合策略对于临床试验至关重要,以克服AML免疫治疗中的诱导性免疫抵抗.

关键词:

抗体是对抗体的一种.免疫调节器免疫调节器免疫治疗是一种免疫疗法.在白血病中,白血病.自然杀手 - - NK - - 是一种自然杀手.

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