针对B7-H3和PD-L1的双特异抗体表现出优越的抗瘤活性
Hua-Ying Li1,2,3, Yi-Li Chen4, Xiang-Nan Deng5
1Shanghai Mabstone Biotechnologies, Ltd., Shanghai, 201203, China.
Acta pharmacologica Sinica
|June 16, 2023
概括
一种针对B7-H3和PD-L1的新型双特异性抗体 (B7-H3×PD-L1 BsAb) 在临床前模型中显示出增强的抗瘤活性. 这种双特异性抗体 (BsAb) 在某些固体瘤中可能比传统的单克隆抗体 (mAbs) 有更好的疗效.
科学领域:
- 免疫学和癌症治疗疗法
背景情况:
- 目前的PD-1/PD-L1单克隆抗体 (mAbs) 的反应率有限,在癌症治疗中面临药物耐药性挑战.
- 在各种固体瘤中观察到B7-H3和PD-L1的同时表达,这表明针对这两种途径的组合疗法的潜力.
- 没有针对PD-1和B7-H3的双特异性抗体已经进入临床开发阶段.
研究的目的:
- 产生和评估一种针对B7-H3和PD-L1.1的新型双特异抗体 (BsAb).
- 在临床前癌症模型中评估B7-H3×PD-L1 BsAb的治疗潜力.
主要方法:
- 一个稳定的B7-H3×PD-L1双特异抗体 (BsAb) 在IgG1-VHH格式中被设计出来.
- 该BsAb的特征是热稳定性,T细胞激活,IFN-γ产生,以及抗体依赖的细胞中介细胞毒性 (ADCC).
- 在PBMC人性化的A375异种瘤模型中评估了抗瘤疗效.
主要成果:
- B7-H3×PD-L1 BsAb表现出有利的热稳定性和增强的免疫细胞激活,包括T细胞激活,IFN-γ产生和ADCC.
- 在活体研究中,BsAb在人性化的瘤模型中显示出比单一疗法和组合疗法更高的抗瘤活性.
- BsAb对共表达B7-H3和PD-L1的瘤表现出更高的特异性,从而诱导了协同治疗效应.
结论:
- 开发的B7-H3×PD-L1 BsAb为B7-H3和PD-L1双阳性瘤提供了一个有前途的治疗策略.
- 这种BsAb显示出与单个单克隆抗体和组合疗法相比的潜在优势,需要进一步的临床研究.
关键词:
B7-H3 B7-H3 B7-H3 B7-H3 B7-H3 B7-H3 B7-H3 B7-H3 B7-H3 B7-H3 B7-H3 B7-H3在PD-L1中.这就是VHH VHH.抗体依赖的细胞中介细胞毒性 (ADCC)两种特异性的抗体.癌症免疫疗法免疫疗法更多相关视频
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