一种新的TM4SF4向治疗抗体候选剂,通过阻断IGF1R和CD44信号传递和降低PD-L1和B7-H4的调节,具有抗瘤活性
Rae-Kwon Kim1,2, Chang-Kyu Heo3, Mun Ju Choi4
1Department of Radiation Biology, Environmental Radiation Research Group, Korea Atomic Energy Research Institute (KAERI), Daejeon 34057, Republic of Korea.
Theranostics
|December 8, 2025
概括
一种新的人性化抗体Hz2B7-1.2针对非小细胞肺癌 (NSCLC) 中的转膜4超级家族成员4 (TM4SF4). 它通过抑制关键途径和增强免疫反应,显示出强大的抗瘤活性,提供了一个有前途的治疗选择.
科学领域:
- 在瘤学瘤学.
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
背景情况:
- 跨膜4超级家族成员4 (TM4SF4) 驱动表皮-介质细胞转换 (EMT) 相关的干和非小细胞肺癌 (NSCLC) 的治疗耐药性.
- TM4SF4在瘤进展和抵抗中的作用使其成为NSCLC的关键治疗点.
研究的目的:
- 开发和描述一个人性化的单克隆抗体,针对TM4SF4进行潜在的NSCLC治疗.
- 在临床前模型中评估抗TM4SF4抗体Hz2B7-1.2的治疗疗效和潜在机制.
主要方法:
- 反TM4SF4单克隆抗体的生成和人性化,包括克隆2B7及其人性化变体Hz2B7-1.2.
- 对信号通路 (PI3K/AKT,JAK2/STAT3),EMT干性,免疫检查点连接体 (ICL) 表达 (PD-L1,B7-H4) 和免疫细胞激活的抗体影响的评估.
- 在A549和患者衍生异种移植 (PDX) 模型中进行临床前评估,包括抗体依赖细胞细胞毒性 (ADCC) 试验.
主要成果:
- 在异种移植和PDX模型中,2B7和Hz2B7-1.2抗体显示出显著的抗瘤疗效.
- 观察到瘤信号通路的抑制,EMT相关的干度的减少和治疗耐药性的降低.
- 降低PD-L1和B7-H4的调节,增强T细胞激活,减少外体ICL分泌是关键发现,与Hz2B7-1.2.2强烈诱导ADCC一起.
结论:
- 人性化的抗TM4SF4抗体Hz2B7-1.2通过多种机制表现出强大的抗瘤活性.
- Hz2B7-1.2通过向致癌途径和调节瘤免疫微环境,有效地抑制瘤生长.
- 这些结果将Hz2B7-1.2定位为TM4SF4阳性癌症的有希望的治疗候选者,值得进一步临床研究.
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