Inhibiting androgen receptor nuclear entry in castration-resistant prostate cancer

被引:18
作者
Pollock, Julie A. [1 ,5 ]
Wardell, Suzanne E. [2 ]
Parent, Alexander A. [1 ]
Stagg, David B. [2 ]
Ellison, Stephanie J. [2 ]
Alley, Holly M. [2 ]
Chao, Christina A. [2 ]
Lawrence, Scott A. [2 ]
Stice, James P. [2 ]
Spasojevic, Ivan [3 ,4 ]
Baker, Jennifer G. [2 ]
Kim, Sung Hoon [1 ]
McDonnell, Donald P. [2 ]
Katzenellenbogen, John A. [1 ]
Norris, John D. [2 ]
机构
[1] Univ Illinois, Dept Chem, Urbana, IL USA
[2] Duke Univ, Sch Med, Dept Pharmacol & Canc Biol, Durham, NC 27708 USA
[3] Duke Univ, Med Ctr, Dept Med, Durham, NC 27710 USA
[4] Duke Canc Inst, Pharmaceut Res PK PD Core Lab, Durham, NC USA
[5] Univ Richmond, Dept Chem, Richmond, VA 23173 USA
关键词
HSP90; CHAPERONE; LNCAP CELLS; ANTIANDROGEN; DERIVATIVES; MUTATION; ENZALUTAMIDE; DETERMINANTS; PROGRESSION; ANTAGONISTS; EXPRESSION;
D O I
10.1038/nchembio.2131
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Clinical resistance to the second-generation antiandrogen enzalutamide in castration-resistant prostate cancer (CRPC), despite persistent androgen receptor (AR) activity in tumors, highlights an unmet medical need for next-generation antagonists. We have identified and characterized tetra-aryl cyclobutanes (CBs) as a new class of competitive AR antagonists that exhibit a unique mechanism of action. These CBs are structurally distinct from current antiandrogens (hydroxyflutamide, bicalutamide, and enzalutamide) and inhibit AR-mediated gene expression, cell proliferation, and tumor growth in several models of CRPC. Conformational profiling revealed that CBs stabilize an AR conformation resembling an unliganded receptor. Using a variety of techniques, it was determined that the AR-CB complex was not recruited to AR-regulated promoters and, like apo AR, remains sequestered in the cytoplasm, bound to heat shock proteins. Thus, we have identified third-generation AR antagonists whose unique mechanism of action suggests that they may have therapeutic potential in CRPC.
引用
收藏
页码:795 / +
页数:9
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