通过针对B7-H6的两种特异性抗体和IL-15的双重T/NK细胞参与消除了耐化疗的固体瘤
Xuqian Ma1,2, Huixia He2, Yuankui Zhu2
1College of Life Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China.
Frontiers in immunology
|August 28, 2025
概括
针对B7-H6的双特异性抗体将免疫细胞转向对抗固体瘤. 这种方法与细胞因子工程相结合,对耐火性癌症的治疗具有极小的毒性.
科学领域:
- 免疫学
- 癌症学
- 生物技术
背景情况:
- B7-H6是一种瘤特异性免疫检查点分子,在恶性瘤中过度表达.
- B7-H6 是癌症治疗的一个有前途的治疗点.
- 针对B7-H6可以选择性地消除癌细胞,同时保留正常组织.
研究的目的:
- 开发针对B7-H6的双特异性抗体 (BsAbs),用于对抗固体瘤的T和NK细胞.
- 在临床前模型中评估针对B7-H6的BsAbs的疗效和安全性.
- 探索涉及BsAbs和细胞因子工程的组合治疗策略.
主要方法:
- 使用菌体显示生成高亲和度B7-H6单克隆抗体.
- 参与T细胞 (B7-H6M4-OKT3) 和NK细胞 (B7-H6M4-LC21) 的结构 BsAbs.
- 在异种移植模型中评估BsAbs的亲和力,对癌细胞的毒性和体内疗效.
主要成果:
- 优化的BsAbs显示出对B7-H6+癌细胞的纳米亲和力和选择性细胞毒性.
- 当与IL-15/IL-15Ra寿司融合蛋白结合使用时,B7-H6M4-LC21显示出增强的瘤杀伤效果.
- 在异种移植模型中,BsAbs抑制了瘤生长,没有显著的毒性.
- 用B7-H6M4-LC21和细胞因子融合蛋白进行组合治疗可以实现协同瘤抑制.
结论:
- 针对B7-H6的BsAbs有效地对抗固体瘤的免疫细胞.
- 使用BsAbs和细胞因子工程的联合治疗为治疗耐火实体瘤提供了可行的策略.
- 这种方法显示出显著的治疗潜力和良好的安全性.
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