Galeterone,851983-85-2

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抑制剂描述：

产品名称：Galeterone

产品别名：见爱必信官网

英文别名：Galeterone

靶点：P450

CAS：851983-85-2

纯度：>98%

外观：见爱必信官网

保存方法：Store at -20℃ for one year（Powder）；Store at 2-4℃ for two weeks；Store at -20℃ for six months after dissolution.

描述：

Galeterone是一种选择性CYP17抑制剂，也是androgen receptor (AR)（雄激素受体）拮抗剂，IC50分别为300 nM和384 nM，也有效抑制人类前列腺肿瘤生长。Galeterone是有效预阻止[³H]-R1881和LNCaP AR (T877A)突变体结合，IC 50为845nM。Galeterone抑制睾酮诱导前列腺细胞LNCaP 和LAPC4增殖，抑制效果呈剂量依赖，IC 50分别为6 μM 和 3.2 μM。在PC3细胞中， Galeterone也抑制[³H]-R1881 和T575A 突变AR的结合，IC 50为454nM。

溶解性：Ethanol ：19.4 mg/mL (50 mM)
DMSO ：19.4 mg/mL (50 mM)

体外研究：

Galeterone is effective at preventing binding of -R1881 to the mutant LNCaP AR (T877A) with IC50 of 845 nM. Galeterone inhibits the DHT-induced proliferation of LNCaP and LAPC4 cells in a dose-dependent manner with IC50 of 6 μM and 3.2 μM, respectively. Galeterone also inhibits the binding of -R1881 to the T575A mutant AR in PC3 cells with IC50 of 454 nM. Galeterone potently inhibits the proliferation of LNCaP and LAPC4 cells in the absence of DHT stimulation with IC50 of 2.6 μM and 4 μM, respectively. Furthermore, Galeterone treatment increases the degradation rate of the AR in a dose-dependent manner. Galeterone potently inhibits the growth of the androgen-independent cell lines PC-3 and DU-145 in a dose-dependent manner with GI50 of 7.82 μM and 7.55 μM, respectively. Galeterone induces the endoplasmic reticulum stress response resulting in down-regulation of cyclin D1 protein expression and cyclin E2 mRNA. Galeterone effectively inhibits proliferation of HP-LNCaP and C4-2B cell lines with IC50 of 2.9 μM and 9.7 μM, respectively. Galeterone treatment at 1 μM effectively inhibits androgen receptor activation in LNCaP cells (50%) and HP-LNCaP cells (70%). Galeterone decreases activation of the androgen receptor in both LNCaP cells and HP-LNCaP cells with IC50 of 1 μM and 411 nM, respectively, and down-regulates androgen receptor protein expression by 50% after 24 hour of treatment. Galeterone reduces AR protein and mRNA expression, antagonizes AR-dependent promoter activation induced by androgen, and significantly reduces the phospho-4EBP1 levels.

体内研究：Administration of Galeterone at 50 mg/kg twice daily is very effective at inhibiting the growth of androgen-dependent LAPC4 human prostate tumor xenograft, with a 93.8% reduction in the mean final tumor volume compared with controls, and it is also significantly more effective than castration. Treatment of Galeterone (0.13 mM/kg twice daily) or Galeterone (0.13 mmol/kg twice daily) plus castration induces regression of LAPC4 tumor xenografts in SCID mice by 26.55% and 60.67%, respectively. Treatments with Galeterone or Galeterone plus castration causes marked reduction in AR protein of 10- and 5-fold, respectively.

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