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Antibody‐drug conjugate MORAb‐202 exhibits long‐lasting antitumor efficacy in TNBC PDx models

机译:抗体 - 药物缀合物Morab-202在TNBC PDX模型中表现出持久的抗肿瘤效力

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摘要

The antibody‐drug conjugate (ADC) MORAb‐202, consisting of farletuzumab paired with a cathepsin B–cleavable linker and eribulin, targets folate receptor alpha (FRA), which is frequently overexpressed in various tumor types. MORAb‐202 was highly cytotoxic to FRA‐positive cells in vitro, with limited off‐target killing of FRA‐negative cells. Furthermore, MORAb‐202 showed a clear in vitro bystander cytotoxic effect in coculture with FRA‐positiveegative cells. In vivo antitumor efficacy studies of MORAb‐202 were conducted with a single administration of MORAb‐202 in triple‐negative breast cancer (TNBC) patient–derived xenograft (PDx) models expressing low and high levels of FRA. MORAb‐202 exhibited durable efficacy proportional to tumor FRA expression. Toxicology studies (Q3Wx2) in nonhuman primates suggested that the major observed toxicity of MORAb‐202 is hematologic toxicity. Overall, these findings support the concept that MORAb‐202 represents a promising investigational ADC for the treatment of TNBC patients.
机译:由法鲁氏菌菌布与与组织蛋白酶B可切割的接头和Eribulin成对的Farletuzumab组成的抗体 - 药物缀合物(ADC)偶联,靶向叶酸受体α(FRA),其在各种肿瘤类型中经常过表达。莫拉布-202对体外的FRA阳性细胞具有高度细胞毒性,有限的脱靶杀死FRA阴性细胞。此外,Morab-202在与FRA阳性/阴性细胞的共培养中显示出透明的体外旁观者细胞毒性作用。在体内抗肿瘤患者中,在三阴性乳腺癌(TNBC)患者衍生的异种移植物(PDX)模型中,通过单一施用Morab-202进行莫拉布-202进行。表达低和高水平的FRA。 Morab-202表现出与肿瘤FRA表达成比例的耐用疗效。非人类原始毒剂中的毒理学研究(Q3WX2)表明Morab-202的主要观察到的毒性是血液学毒性。总体而言,这些发现支持莫拉布-202代表了一个用于治疗TNBC患者的有前途的研究ADC的概念。

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