雄激素受体
泛素连接酶
蛋白酶体
化学
受体
蛋白质降解
泛素
雄激素
蛋白酶体抑制剂
细胞生物学
平方毫米
生物化学
药理学
癌症研究
生物
内科学
细胞凋亡
前列腺癌
癌症
医学
基因
激素
作者
Ashley R. Schneekloth,Mathieu Pucheault,Hyun Seop Tae,Craig M. Crews
标识
DOI:10.1016/j.bmcl.2008.07.114
摘要
We have developed a heterobifunctional all-small molecule PROTAC (PROteolysis TArgeting Chimera) capable of inducing proteasomal degradation of the androgen receptor. This cell permeable PROTAC consists of a non-steroidal androgen receptor ligand (SARM) and the MDM2 ligand known as nutlin, connected by a PEG-based linker. The SARM-nutlin PROTAC recruits the androgen receptor to MDM2, which functions as an E3 ubiquitin ligase. This leads to the ubiquitination of the androgen receptor, and its subsequent degradation by the proteasome. Upon treatment of HeLa cells with 10microM PROTAC for 7h, we were able to observe a decrease in androgen receptor levels. This degradation is proteasome dependent, as it is mitigated in cells pre-treated with 10microM epoxomicin, a specific proteasome inhibitor. These results have implications for the potential study and treatment of various cancers with increased androgen receptor levels.
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