PROTAC ER Degrader-2 serves as a synthesis intermediate for the production of PAC, a compound that incorporates the ADCs linker and PROTACs, which are subsequently conjugated to an antibody. PAC, exhibits a greater capability to degrade estrogen receptor-alpha (ERα) compared to PROTAC (without the presence of an antibody)[1].
PROTAC ERα Degrader-2 comprises a cIAP1 ligand binding group, a linker and an estrogen receptor α (ERα) binding group. PROTAC ERα Degrader-2 is an ERα degrader. Maximal ERα degradation at 30 μM concentration in human mammary tumor MCF7 cells. Degradation inducers based on cIAP1 are called specific and non-genetic IAP-dependent protein erasers (SNIPERs)[1].
Vepdegestrant (ARV-471) 是一种具有选择性和高效性的雌激素受体(ER,ESR1)PROTAC 降解剂,对 ER 蛋白具有强效降解能力。Vepdegestrant 通过直接降解 ER 蛋白而非单纯拮抗其活性,有效抑制 ER 信号通路,在 ER 阳性(ER⁺)乳腺癌中表现出显著的抗肿瘤活性,DC50 值约为 2 nM,尤其对 ESR1 突变型肿瘤同样具有良好效果。