干白素-18 (IL-18) 经过工程设计,延长了半衰期和对IL-18结合蛋白 (IL-18BP) 的耐药性,以增强抗癌治疗潜力
Kristiana H Dreaden1, Su-Ping Pearson1, Pinar S Gurel1
1Mural Oncology Inc., 852 Winter Street, Waltham, MA 02451, United States.
Cytokine
|June 22, 2025
概括
工程化介质素-18 (IL-18) 抵抗自然抑制剂,并具有更长的半衰期,增强抗癌免疫反应. 这种新的方法在临床前模型中显示出显著的瘤生长抑制和改善的生存率.
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:
- 复合性互白素-18 (IL-18) 是一个有前途的瘤治疗药物,因为它具有免疫激活特性.
- 临床限制包括IL-18结合蛋白 (IL-18BP) 的快速抑制和IL-18.18短暂的全身清除.
研究的目的:
- 设计具有对IL-18BP耐药性和延长半衰期的IL-18变体,以提高治疗疗效.
- 创建一种基于IL-18的新型治疗方法,用于持续的抗癌免疫反应.
主要方法:
- 人类和小鼠的IL-18正方体被设计为IL-18BP耐药性,并与Fc支架融合以延长半衰期.
- 在体外测试中评估了IL-18BP结合和生物活性.
- 在合成和人性化小鼠模型中进行了药理动力学研究和体内疗效评估.
主要成果:
- 工程 IL-18 变体没有显示可检测的 IL-18BP 结合,并且在 IL-18BP 存在时保持活性.
- 与裸体IL-18变体相比,Fc融合的IL-18变体显示出延长半衰期和更持久的TH1细胞因子产生.
- 在临床前癌症模型中,每周给工程小鼠IL-18变异剂导致显著的瘤生长抑制和改善存活率.
结论:
- 工程 IL-18 变种克服 IL-18BP 抑制和快速清除显示持续抗癌免疫的潜力.
- 这些发现强调了对IL-18BP抗性,Fc融合IL-18在瘤治疗中的治疗前景.
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