Synthesis and biological evaluation of niclosamide PROTACs.

Synthesis and biological evaluation of niclosamide PROTACs.
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DOI:
10.1016/j.bmcl.2022.128870
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发表时间:
2022-09-15
影响因子:
2.7
通讯作者:
Chen, Qiao-Hong
Chen, Qiao-Hong
中科院分区:
医学4区
文献类型:
--
作者:
Munoz, Erick;Chen, Guanglin;Hossain, Ahamed;Wu, Sitong;Nava, Esveidy Oceguera;Hang, Jasmine;Lee, Tong;Zhang, Qiang;Wang, Guangdi;Chen, Qiao-Hong

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美国癌症协会预计,2022年美国将出现大约268,000例前列腺癌新发病例和34,000例前列腺癌死亡病例。雄激素受体是前列腺癌细胞增殖和存活的关键蛋白质,并且已经发现在30%至50%的去势抵抗性前列腺癌患者中过表达。降低该蛋白质水平的一种有希望的方法是蛋白质水解靶向嵌合体(PROTAC),这是一种新兴的药物发现技术。PROTAC是异源双功能分子,其中一端与目的蛋白结合,另一端与E3连接酶配体结合,启动泛素-蛋白酶体途径进行蛋白质降解。设计并合成了两种以氯硝柳胺为雄激素受体配体和VHL-032为E3连接酶配体的PROTAC,用于通过降解雄激素受体来抑制雄激素受体阳性前列腺癌细胞的增殖。体外抗增殖评估表明,它们可以选择性地抑制PC-3、LNCaP和22 Rv 1前列腺癌细胞增殖,但不能抑制DU 145细胞增殖。然而,这两种化合物抑制前列腺癌细胞增殖的机制不是通过AR PROTAC机制,因为在我们的蛋白质印迹法中,它们在高达1 μM时不降解AR。
Roughly 268,000 new cases of prostate cancer and 34,000 deaths from prostate cancer are projected by the American Cancer Society to occur in the United States in 2022. Androgen receptor is a key protein in the proliferation and survival of prostate cancer cells and has been revealed to be overexpressed in 30% to 50% of castration-resistant prostate cancer patients. One promising approach to reducing the level of this protein is Proteolysis Targeting Chimeras (PROTACs) that is an emerging drug discovery technology. PROTACs are hetero-bifunctional molecules where one end binds to a protein of interest and the other to an E3 ligase ligand, initiating the Ubiquitin-Proteasome Pathway for protein degradation. Two PROTACs with niclosamide as androgen receptor ligand and VHL-032 as the E3 ligase ligand have been designed and synthesized for suppressing proliferation of androgen receptor-positive prostate cancer cells via degrading androgen receptor. The in vitro antiproliferative assessment suggested that they can selectively suppress PC-3, LNCaP, and 22Rv1 prostate cancer cell proliferation, but cannot inhibit DU145 cell proliferation. However, the mechanism of both compounds in suppressing prostate cancer cell proliferation is not through the AR PROTAC mechanism because they did not degrade AR in our Western Blotting assay up to 1 μM.
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