Immunoproteasome inhibitor 1 is a highly potent and reversible inhibitor of both immunoproteasome and proteasome activity. It exhibits time-independent inhibitory effects on immunoproteasome subunits β5c, β1i, and β5i, with respective Ki values of 1.18 μM, 0.27 μM, and 1.91 μM. This compound shows promising potential for the treatment of select neoplastic diseases [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。