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双特异性杀伤细胞激活剂增强NK细胞对抗互白素-13受体α-2阳性质瘤的活性
Kristen D Pawlowski1,2, Joseph T Duffy1, Arushi Tiwari1
1Department of Neurological Surgery, Northwestern University, Chicago, IL 60611, USA.
Cells
|July 14, 2023
概括
新型双特异杀手细胞参与剂 (BiKEs) 通过激活自然杀手 (NK) 细胞,有效地向质母细胞瘤. 在临床前模型中,这种免疫疗法显著增强了质瘤细胞的杀死,并延长了生存期.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 生物技术是生物技术.
背景情况:
- 质母细胞瘤 (GBM) 是一个重大的治疗挑战,因为治疗选择有限.
- 自然杀手 (NK) 细胞是具有癌症治疗潜力的重要免疫成分.
- 双特异性杀伤细胞参与剂 (BiKEs) 是一种新的免疫疗法策略,用于利用NK细胞对抗瘤的活性.
研究的目的:
- 设计和评估一种针对质瘤相关抗原IL13Rα2.2.的新型BiKE分子.
- 评估开发的BiKE在激活NK细胞和调解质瘤细胞杀死中的有效性.
- 在临床前的GBM模型中确定BiKE介导的NK细胞免疫疗法的体内治疗潜力.
主要方法:
- 设计了一种BiKE分子,结合了CD16抗体,IL-15链接剂和抗IL13Rα2单链可变抗体.
- 使用HEK细胞表达和净化了复合BiKE蛋白.
- 实验室试验涉及共培养来自外围血液的NK细胞与来自患者的GBM异种移植线,然后进行流细胞计和免疫光染色.
- 在体内研究中,在GBM的小鼠模型中使用BiKE进行NK细胞的内输送,并进行生存和组织学分析.
主要成果:
- 在体外,BIKE治疗显著增加了NK细胞激活 (CD25+CD69+) 和质瘤细胞杀死.
- 通过切割的caspase-3染色证实了质瘤细胞亡.
- 在携带GBM瘤的小鼠中,NK细胞的内输送与BiKE相结合显著延长了中位生存期.
- 组织学分析显示,在接受BiKE治疗的小鼠中,周NK细胞的透率较高.
结论:
- 一种针对IL13Rα2阳性质瘤的新型BiKE在哺乳动物表达系统中成功生成.
- 开发的BiKE有效地增强了NK细胞介导的质瘤细胞的杀死.
- 基于BiKE的免疫疗法在临床前环境中显示出对质母细胞瘤的显著治疗潜力.
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