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一个CD38导向的单链T细胞参与者通过IFN-γ诱导的CD38表达来准白血病干细胞

Mariam Murtadha^1,2, Miso Park³, Yinghui Zhu^1,2,4

¹Department of Hematology and Hematopoietic Cell Transplantation, Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope, Duarte, CA.

|February 23, 2024

概括

一种针对CD38+急性髓性白血病 (AML) 细胞的新疗法通过吸引T细胞和诱导干扰素玛 (IFN-γ) 有效地消除白血病干细胞 (LSC). 这种方法增强了对抗性LSCs的CD38表达,导致它们在不损害健康细胞的情况下被破坏.

科学领域:

免疫学免疫学免疫学
血液学血液学血液学
在瘤学瘤学.

背景情况:

急性髓性白血病 (AML) 的耐治疗性往往是由于白血病干细胞 (LSC) 和免疫抑制.
可以在CD34+CD38-分数中发现LSCs,这构成了治疗挑战.
干扰素 (IFN-γ) 降低了LSC活动,并提高了LSC上的CD38的调节.

研究的目的:

开发一种针对LSC在AML中的新疗法策略.
为了利用IFN-γ诱导的CD38表达来通过免疫媒介消除LSC.

主要方法:

开发一种单链CD38-CD3T细胞激活器 (BN-CD38).
评估BN-CD38对T细胞和AML爆发的能力.
在体外和体内对T细胞激活,扩张和白血病细胞清除的评估.
分析IFN-γ释放及其对LCS CD38表达和消除的影响.
在人性化小鼠中测试BN-CD38对正常造血干细胞和免疫细胞发育的安全性.

主要成果:

BN-CD38成功地激活了自身T细胞和CD38+AML爆发,导致T细胞激活和白血病细胞消除.
BN-CD38诱导了IFN-γ的释放,这对CD34+CD38-LSC上调节了CD38,促进了它们的消除.
在AML模型中,BN-CD38在体内显示出显著的有效性.
在人性化小鼠中,BN-CD38并没有损害正常的造血干细胞功能或免疫细胞发育.

结论:

BN-CD38是一种有前途的AML治疗剂,能够向CD38+AML爆发和LSC.
结合T细胞参与和IFN-γ介导的CD38诱导,为消除AMLLLSC提供了一种新的策略.
这种方法显示出安全有效的AML治疗的潜力,而不会影响正常的血液形成或免疫复合.

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