强度优化的CD28激活双特异性抗体,用于针对性治疗尼克-4阳性癌症
Manpreet Kaur1, Katja Rüger2, Elaine C Chen3
1Preclinical Biology, Rondo Therapeutics Inc, Hayward, California, USA.
Journal for immunotherapy of cancer
|April 5, 2025
概括
这项研究引入了新的双特异性抗体 (bsAbs),可以增强T细胞对抗Nectin-4阳性癌症的反应. 双特异抗体RNDO-564在治疗泌尿器癌方面显示出有希望的疗效和耐受性.
科学领域:
- 免疫学和瘤学
- 治疗抗体工程 治疗抗体工程
背景情况:
- 对抗瘤免疫力至关重要的是T细胞的辅助刺激,但由于瘤中的配体表达低而受损.
- 针对CD28和瘤抗原的双特异性抗体 (bsAbs) 提供局部T细胞共刺激.
- 在泌尿器癌 (UC) 中,nectin-4的表达很高,这使其成为一个有前途的治疗点.
研究的目的:
- 设计和评估用于癌症免疫治疗的新型CD28 × Nectin-4双特异抗体.
- 在临床前模型中评估主要候选药物RNDO-564的疗效和安全性.
主要方法:
- 抗体发现管道确定了针对CD28和Nectin-4的抗体.
- 工程 bsAbs 在体外测试了T细胞共刺激功能.
- 在体内有效性被评估在同源性小鼠瘤模型;耐受性和非人类灵长类动物的PK.
主要成果:
- 在体外研究证实bsAbs可以增强T细胞激活和对Nectin-4+瘤细胞的细胞毒性.
- RNDO-564证明了最大化的抗瘤疗效和有利的治疗窗口.
- 在体内研究显示,单独使用RNDO-564和检查点抑制剂显著的瘤回归;有利的NHP安全性和PK概况.
结论:
- 首个针对Nectin-4的CD28 × Nectin-4 bsAb已经开发出来.
- CD28 × Nectin-4 bsAbs 是一种新的免疫治疗方式.
- RNDO-564为晚期泌尿器癌和其他Nectin-4+恶性瘤提供了临床开发的理由.
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