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Clin Cancer Res:新型抗体-药物耦联剂SAR408701治疗CEACAM5阳性上皮肿瘤的活性

2020-10-14 星云 MedSci原创

癌胚抗原相关细胞黏附分子5(CEACAM5)是一种糖蛋白,在正常成人组织中限制性表达,但在胃肠道癌、泌尿生殖系统癌、呼吸系统癌和乳腺癌中过表达。因此,CEACAM5是基于抗体治疗的一个有吸引力的靶点,

癌胚抗原相关细胞黏附分子5(CEACAM5)是一种糖蛋白,在正常成人组织中限制性表达,但在胃肠道癌、泌尿生殖系统癌、呼吸系统癌和乳腺癌中过表达。因此,CEACAM5是基于抗体治疗的一个有吸引力的靶点,旨在选择性地将细胞毒性药物输送到某些上皮肿瘤中。

在本研究中,研究人员报道了一个关于由抗CEACAM5抗体(SAR408377)和maytansinoid制剂DM4偶联合成的新型抗体-药物偶联剂(ADC)——SAR408701——的预临床试验数据。

研究人员在体外检测了SAR408701对人和食蟹猴CEACAM5的特异性和结合亲和力。并在表达CEACAM5的肿瘤细胞系和CEACAM5阳性肿瘤患者源性异种移植小鼠模型中评估了SAR408701的细胞毒性。

SAR408701可选择性结合人和食蟹猴的CEACAM5,且两物种间具有相似的Kd值(0.017 nM和0.024 nM,)。体外和体内评估均显示,SAR408701具有细胞毒性活性,单次和重复给药均可在体内起效。单剂量SAR408701可诱导肿瘤中磷酸化组蛋白H3的表达显著增加,证实了其发挥作用的微管蛋白靶向机制。最后,SAR408701在食蟹猴体内的总体毒性与单纯静脉注射DM4后观察到的相似。

基于该预临床数据,ADC SAR408701是CEACAM5阳性肿瘤的很有前途的潜在候选治疗药物

原始出处:

Filip Janku, et al. Intratumoral Injection of Clostridium novyi-NT Spores in Patients with Treatment-Refractory Advanced Solid Tumors. Clin Cancer Res October 12 2020 DOI:10.1158/1078-0432.CCR-20-2065

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    2020-11-16 whmdzju
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    2021-04-06 lishizhe
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    2020-10-15 shizhenshan

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