产生一种新型SORT1×HER2双特异抗体-药物结合物,向HER2-低表达瘤
Weiliang Zhuang1,2, Wei Zhang2, Lei Wang1
1Engineering Research Center of Cell & Therapeutic Antibody, Ministry of Education, School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China.
International journal of molecular sciences
|November 25, 2023
概括
一种针对 HER2 和 Sortilin-1 (SORT1) 的新型双特异性抗体-药物合物 (bsADC) 显示出治疗 HER2 表达率低的瘤的前景,改进了现有的针对 HER2 的 ADC 疗法.
科学领域:
- 在瘤学瘤学.
- 免疫治疗是一种免疫疗法.
- 药物开发 药物开发
背景情况:
- 人类表皮生长因子受体2 (HER2) 是抗体-药物合物 (ADC) 的验证标,但在具有低HER2表达的患者中有效性有限.
- 现有的针对HER2的ADC为高表达HER2的瘤提供了好处,但需要针对更广泛的患者群体进行优化.
- 索尔提林-1 (SORT1) 在瘤中与HER2共同表达,并表现出快速的内化,使其成为潜在的协同目标.
研究的目的:
- 开发和评估针对HER2和SORT1的双特异抗体药物合物 (bsADC),以克服HER2向ADC在低HER2表达瘤中的局限性.
- 评估一种新型双特异抗体 (bsSORT1×HER2) 的结合,内化和 HER2 降解能力.
- 在临床前模型中确定bsADC (bsSORT1×HER2-DXd) 的体外细胞毒性和体内抗瘤疗效.
主要方法:
- 开发一种针对HER2和SORT1 (bsSORT1×HER2) 的双特异性抗体 (BsAb).
- 将bsBsAb与细胞毒性有效载荷DXd相结合,形成一个bsADC (bsSORT1×HER2-DXd).
- 在MDA-MB-231异种移植小鼠模型中评估bsADC结合,内化,HER2降解,HER2低表达瘤细胞中的细胞毒性和抗瘤疗效.
主要成果:
- 该bsSORT1×HER2抗体在HER2低表达瘤细胞上表现出强烈的结合和内化活性.
- 该bsADC (bsSORT1×HER2-DXd) 对HER2低表达瘤细胞表现出强烈的细胞毒性.
- 在用bsadc治疗的MDA-MB-231异种移植小鼠模型中观察到显著的抗瘤疗效.
结论:
- 一种针对HER2和SORT1 (bsSORT1×HER2-DXd) 的双特异性抗体-药物结合体对HER2-低表达瘤有效.
- 这种bsADC策略为更广泛的患者提供了一种有希望的方法,以提高针对HER2的ADC疗法的疗效.
- 针对共同表达的瘤抗原的bsADCs的发展代表了癌症治疗的重大进展.
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