Using a convergent synthetic route to enable multiple points of diversity, a series of glucocorticoid receptor modulators (GRM) were profiled for potency, selectivity, and drug-like properties in vitro. Despite covering a large range of diversity, profiling the nonconjugated small molecule was suboptimal and they were conjugated to a mouse antitumor necrosis factor (TNF) antibody using the MP-Ala-Ala linker. Screening of the resulting antibody drug conjugates (ADCs) provided a better assessment of efficacy and physical properties, reinforcing the need to conduct structure–activity relationship studies on the complete ADC. DAR4 ADCs were screened in an acute mouse contact hypersensitivity model measuring biomarkers to ensure a sufficient therapeutic window. In a chronic mouse arthritis model, mouse anti-TNF GRM ADCs were efficacious after a single dose of 10 mg/kg i.p. for over 30 days. Data on the unconjugated payloads and mouse surrogate anti-TNF ADCs identified payload 17 which was conjugated to a human anti-TNF antibody and advanced to the clinic as ABBV-3373.

中文翻译：

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发现 ABBV-3373，一种抗 TNF 糖皮质激素受体调节剂免疫学抗体药物偶联物

使用收敛合成路线以实现多个多样性点，对一系列糖皮质激素受体调节剂（GRM）的效力、选择性和体外药物特性进行了分析。尽管涵盖了大范围的多样性，但对非缀合小分子的分析并不理想，并且使用 MP-Ala-Ala 连接子将它们与小鼠抗肿瘤坏死因子 (TNF) 抗体缀合。对所得抗体药物偶联物 (ADC) 的筛选可以更好地评估功效和物理特性，从而强化了对完整 ADC 进行结构-活性关系研究的必要性。在测量生物标志物的急性小鼠接触超敏反应模型中筛选 DAR4 ADC，以确保足够的治疗窗口。在慢性小鼠关节炎模型中，小鼠抗 TNF GRM ADC 在单剂量 10 mg/kg ip 持续 30 天以上后有效。未缀合的有效负载和小鼠替代抗 TNF ADC 的数据确定了有效负载17，该有效负载 17 与人抗 TNF 抗体缀合，并以 ABBV-3373 的形式进入临床。