ARN-509 is a synthetic biaryl thiohydantoin compound that inhibits androgen receptor (AR), with an IC50 value of 16nM[1]. ARN-509 irreversibly binds to the ligand binding domain of the AR with high affinity, induces conformational changes in AR, hinders the translocation of the receptor complex to the nucleus, and thereby prevents its binding to androgen response elements[2]. ARN-509 has been widely used in the related research on prostate cancer treatment[3].
In vitro, ARN-509 treatment (100μM; 24h) significantly inhibited the proliferation of 22Rv1 cells, and suppressed nuclear entry of AR, AR-V7, and phosphorylated AR[4]. Treatment with 10μM ARN-509 significantly inhibited AR signal transduction in LNCaP prostate cancer cell lines, resulting in reduced cell proliferation[1].
In vivo, ARN-509 treatment through oral gavage at a dose of 30mg/kg/day for 60 weeks, which significantly reduced the incidence of prostate cancer induced by N-methyl-N-nitrosourea in male Wistar rats[5]. In the LNCaP/AR castration-resistant prostate cancer (CRPC) mouse model, an oral administration dose of 10mg/kg/day of ARN-509 can significantly inhibit tumor regression[6]. In genetically engineered mouse prostate cancer (GEM-PCa) models, four weeks of oral treatment with ARN-509 (30mg/kg/day) significantly reduced tumor burden by 33.5% and increased PI3K-AKT signaling[7].
References:
[1]Clegg N J, Wongvipat J, Joseph J D, et al. ARN-509: a novel antiandrogen for prostate cancer treatment[J]. Cancer research, 2012, 72(6): 1494-1503.
[2]Smith M R, Antonarakis E S, Ryan C J, et al. Phase 2 study of the safety and antitumor activity of apalutamide (ARN-509), a potent androgen receptor antagonist, in the high-risk nonmetastatic castration-resistant prostate cancer cohort[J]. European urology, 2016, 70(6): 963-970.
[3]Smith M R, Antonarakis E S, Ryan C J, et al. ARN-509 in men with high risk non-metastatic castration-resistant prostate cancer[J]. Annals of Oncology, 2012, 23: ix303.
[4]Koukourakis M I, Kakouratos C, Kalamida D, et al. Comparison of the effect of the antiandrogen apalutamide (ARN-509) versus bicalutamide on the androgen receptor pathway in prostate cancer cell lines[J]. Anti-cancer drugs, 2018, 29(4): 323-333.
[5]Murillo G, Peng X, Muzzio M, et al. Exceptional activity of ARN-509 (apalutamide) in prostate cancer prevention in rats[J]. Cancer Research, 2019, 79(13_Supplement): 2730-2730.
[6]Hager J H, Smith N D, Bischoff E, et al. Effect of the novel anti-androgen ARN-509 on response and seizure in castration-resistant prostate cancer models[J]. Journal of Clinical Oncology, 2011, 29(7_suppl): 28-28.
[7]Velasco M A D, Nozawa M, Kura Y, et al. Apalutamide (ARN-509) demonstrates therapeutic efficacy in genetically engineered mouse models of Pten-deficient prostate cancer[J]. Cancer Research, 2018, 78(13_Supplement): 3737-3737.
ARN-509是一种合成的双芳基硫代乙内酰脲化合物,抑制雄激素受体(AR),IC50值为16nM[1]。ARN-509通过高亲和力不可逆地结合AR的配体结合域,诱导受体构象变化,阻碍受体复合物向细胞核的转运,从而阻止AR与雄激素反应元件的结合[2]。ARN-509已被广泛应用于前列腺癌治疗的相关研究中[3]。
在体外,ARN-509(100μM;24小时)处理能显著抑制22Rv1细胞的增殖,并阻断AR、AR-V7变体及磷酸化AR的核内转移[4]。10μM浓度的ARN-509处理可显著抑制LNCaP前列腺癌细胞系的AR信号传导,导致细胞增殖减少[1]。
在体内,ARN-509通过口服灌胃给药(30mg/kg/day)持续60周能显著降低雄性Wistar大鼠由N-甲基-N-亚硝基脲诱导的前列腺癌发生率[5]。在LNCaP/AR去势抵抗性前列腺癌(CRPC)小鼠模型中,每日10mg/kg剂量的ARN-509口服给药可显著抑制肿瘤进展[6]。在基因工程小鼠前列腺癌(GEM-PCa)模型中,ARN-509口服治疗(30mg/kg/day)持续4周,使肿瘤负荷显著降低33.5%,同时增强PI3K-AKT信号通路活性[7]。
















