Targeted protein degradation using small molecules is a novel strategy for drug development. In order to solve the problem of drug resistance in the treatment of prostate cancer, proteolysis-targeting chimeras (PROTAC) was introduced into the design of anti-prostate cancer derivatives. In this work, we synthesized two series of selective androgen receptor degraders (SARDs) containing the hydrophobic degrons with different linker, and then investigated the structure-activity relationships of these hybrid compounds. Most of the synthesized compounds exhibited moderate to good activity against all the cancer cell lines selected. Among them, compound A9 displayed potent inhibitory activity against LNCaP prostate cancer cell line with IC₅₀ values of 1.75 μM, as well as excellent AR degradation activity. Primary mechanism studies elucidated compound A9 arrested cell cycle at G0/G1 phase and induced a mild apoptotic response in LNCaP cells. Further study indicated that the degradation of AR was mediated through proteasome-mediated process. For all these reasons, compound A9 held promising potential as anti-proliferative agent for the development of highly efficient SARDs for drug-resistance prostate cancer therapies.

使用小分子进行有针对性的蛋白质降解是药物开发的新策略。为了解决前列腺癌治疗中的耐药性问题，将蛋白水解靶向嵌合体（PROTAC）引入抗前列腺癌衍生物的设计中。在这项工作中，我们合成了两个系列的选择性雄激素受体降解剂（SARDs），其中包含具有不同连接基的疏水性degron，然后研究了这些杂化化合物的构效关系。大多数合成的化合物对所选的所有癌细胞系均表现出中等至良好的活性。其中，化合物A9的IC ₅₀表现出对LNCaP前列腺癌细胞系的有效抑制活性值1.75μM，以及出色的AR降解活性。主要机理研究阐明了化合物A9在G0 / G1期停滞了细胞周期，并在LNCaP细胞中诱导了轻度的凋亡反应。进一步的研究表明AR的降解是通过蛋白酶体介导的过程介导的。由于所有这些原因，化合物A9在开发抗药性前列腺癌疗法的高效SARDs中具有作为抗增殖剂的潜力。