CD155介导免疫调节的分子基础由一种新的表位特异性人类单克隆抗体揭示出来
Jae Hyeon Hwang1, Ji Hyun Lee1, Kyusang Hwang2
1Department of Biopharmaceutical Chemistry, Kookmin University, Seoul, 02707, Republic of Korea.
International journal of biological macromolecules
|December 11, 2025
概括
研究人员开发了一种新型抗体,K116.4,向CD155,一种在癌症中过度表达的免疫检查点蛋白. 这种抗体增强了T细胞的激活,并减少了瘤的免疫逃避,提供了一个有前途的新癌症免疫治疗策略.
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:
- CD155 (也称为PVR) 是一种免疫检查点蛋白质,与瘤免疫逃避有关.
- 过度表达CD155允许癌细胞逃避免疫监测,需要新的治疗方法.
研究的目的:
- 为了产生和表征完全人类单克隆抗体 (mAbs) 对人类CD155 (hCD155).
- 研究CD155介导免疫调节的机制,并探索针对CD155的免疫疗法.
主要方法:
- 体显示技术被用来产生抗hCD155 mAbs.
- 使用了竞争性结合试验,T细胞激活试验和表位图绘制.
- 评估了抗体亲和力,抑制潜力和对T细胞的功能影响.
主要成果:
- K116.4 mAb显示出对hCD155的高亲和力结合 (KD = 0.98 nM),并强烈抑制了CD155与TIGIT和CD96的相互作用.
- K116.4增强了T细胞激活,抵消了CD155介导的免疫抑制.
- 用K116.4治疗导致CD155内部化和瘤细胞的下调.
结论:
- K116.4抗体代表了针对CD155的癌症免疫治疗的有希望的治疗候选者.
- 皮层映射发现Pro231-Arg300对于抗体结合和免疫调节至关重要.
- 这项研究提供了关于CD155免疫调节作用的见解,并为开发新型免疫疗法提供了框架.
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