Seviteronel
(Synonyms: VT-464) 目录号 : GC37631
Seviteronel (VT-464) 是 CYP17 裂解酶抑制剂，对h-Lyase的 IC50 为 69 nM。
Cas No.:1610537-15-9
Sample solution is provided at 25 µL, 10mM.
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Quality Control & SDS
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- Purity: >99.50%
- COA (Certificate Of Analysis)
- SDS (Safety Data Sheet)
- Datasheet
Seviteronel (VT-464) is a potent CYP17 lyase inhibitor(h-Lyase IC50=69 nM) that demonstrated both exceptional in vitro lyase/hydroxylase selectivity (~10-fold) and oral activity in a hamster model of androgen biosynthesis inhibition. IC50: 69 nM(h-CYP17 Lyase)[1].
Seviteronel (VT-464), a non-steroidal small molecule inhibits androgen production without mineralocorticoid excess or cortisol depletion by selective inhibition of CYP17 17,20-lyase. We determined the impact of Seviteronel (VT-464) on tumor growth of a mCRPC xenograft, MDA-PCa-133, in vivo, and on androgen signaling in C4-2B prostate cancer cells in vitro[2].
The MDA-PCa-133 xenograft is derived from a clinical CRPC bone metastasis. Subcutaneous MDA-PCa-133 tumor expresses PSA, full-length androgen receptor (AR) and AR-V7 isoform. We determined the effect of Seviteronel (VT-464) and AA on MDA-PCa-133 growing in tumor-bearing castrated male mice: randomization into three groups; oral treatment with vehicle only, VT-464, (100 mg/kg bid), or AA (100 mg/kg bid) for 25 days. Both Seviteronel (VT-464) and AA reduced tumor volume (>two fold compared to vehicle; p<0.05). These results indicate that selective Seviteronel (VT-464) CYP17 lyase inhibition is as effective as AA CYP17 inhibition in this model [2].
[1]. Rafferty SW, et al. Highly-selective 4-(1,2,3-triazole)-based P450c17a 17,20-lyase inhibitors. Bioorg Med Chem Lett. 2014 Jun 1;24(11):2444-7. [2]. Sankar N. Maity, et al. Abstract 4772: Efficacy of VT-464, a novel selective inhibitor of cytochrome P450 17,20-lyase, in castrate-resistant prostate cancer models. Cancer Research: April 15, 2013; Volume 73, Issue 8, Supplement 1
| Cas No. | 1610537-15-9 | SDF | |
| 别名 | VT-464 | ||
| Canonical SMILES | FC(F)OC1=C(OC(F)F)C=C(C=CC([C@](C2=CNN=N2)(C(C)C)O)=C3)C3=C1 | ||
| 分子式 | C18H17F4N3O3 | 分子量 | 399.34 |
| 溶解度 | DMSO: ≥ 50 mg/mL (125.21 mM) | 储存条件 | Store at -20°C |
| General tips | 请根据产品在不同溶剂中的溶解度选择合适的溶剂配制储备液；一旦配成溶液，请分装保存，避免反复冻融造成的产品失效。 储备液的保存方式和期限：-80°C 储存时，请在 6 个月内使用，-20°C 储存时，请在 1 个月内使用。 为了提高溶解度，请将管子加热至37℃，然后在超声波浴中震荡一段时间。 |
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| Shipping Condition | 评估样品解决方案：配备蓝冰进行发货。所有其他可用尺寸：配备RT，或根据请求配备蓝冰。 | ||
| 制备储备液 | |||
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1 mg | 5 mg | 10 mg |
| 1 mM | 2.5041 mL | 12.5207 mL | 25.0413 mL |
| 5 mM | 0.5008 mL | 2.5041 mL | 5.0083 mL |
| 10 mM | 0.2504 mL | 1.2521 mL | 2.5041 mL |
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动物平均体重 | g | |
每只动物给药体积 | ul | |
动物数量 | 只 |
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2.
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Seviteronel, a Novel CYP17 Lyase Inhibitor and Androgen Receptor Antagonist, Radiosensitizes AR-Positive Triple Negative Breast Cancer Cells
Front Endocrinol (Lausanne) 2020 Feb 11;11:35.PMID:32117061DOI:10.3389/fendo.2020.00035.
Increased rates of locoregional recurrence (LR) have been observed in triple negative breast cancer (TNBC) despite multimodality therapy, including radiation (RT). Recent data suggest inhibiting the androgen receptor (AR) may be an effective radiosensitizing strategy, and AR is expressed in 15-35% of TNBC tumors. The aim of this study was to determine whether Seviteronel (INO-464), a novel CYP17 lyase inhibitor and AR antagonist, is able to radiosensitize AR-positive (AR+) TNBC models. In cell viability assays, Seviteronel and enzalutamide exhibited limited effect as a single agent (IC50 > 10 μM). Using clonogenic survival assays, however, AR knockdown and AR inhibition with Seviteronel were effective at radiosensitizing cells with radiation enhancement ratios of 1.20-1.89 in models of TNBC with high AR expression. AR-negative (AR-) models, regardless of their estrogen receptor expression, were not radiosensitized with Seviteronel treatment at concentrations up to 5 μM. Radiosensitization of AR+ TNBC models was at least partially dependent on impaired dsDNA break repair with significant delays in repair at 6, 16, and 24 h as measured by immunofluorescent staining of γH2AX foci. Similar effects were observed in an in vivo AR+ TNBC xenograft model where there was a significant reduction in tumor volume and a delay to tumor doubling and tripling times in mice treated with Seviteronel and radiation. Following combination treatment with Seviteronel and radiation, increased binding of AR occurred at DNA damage response genes, including genes involved both in homologous recombination and non-homologous end joining. This trend was not observed with combination treatment of enzalutamide and RT, suggesting that Seviteronel may have a different mechanism of radiosensitization compared to other AR inhibitors. Enzalutamide and Seviteronel treatment also had different effects on AR and AR target genes as measured by immunoblot and qPCR. These results implicate AR as a mediator of radioresistance in AR+ TNBC models and support the use of Seviteronel as a radiosensitizing agent in AR+ TNBC.
Phase 2 Study of Seviteronel (INO-464) in Patients With Metastatic Castration-Resistant Prostate Cancer After Enzalutamide Treatment
Clin Genitourin Cancer 2020 Aug;18(4):258-267.e1.PMID:32327394DOI:10.1016/j.clgc.2019.11.002.
Background: Seviteronel was being developed by Innocrin Pharmaceuticals as a selective cytochrome P450c17a (CYP17) 17,20-lyase (lyase) inhibitor and androgen receptor antagonist with activity against prostate cancer cells in vitro and in vivo. This open-label phase 2 clinical study evaluated the tolerability and efficacy of Seviteronel in patients with metastatic castration-resistant prostate cancer (mCRPC) previously treated with enzalutamide. Patients and methods: Patients with mCRPC whose disease previously progressed while receiving enzalutamide therapy were divided into 2 cohorts on the basis of prior exposure to docetaxel. Seviteronel was administered without routine oral steroids either twice daily with dose titration (450 mg) or once daily without dose titration (600 or 750 mg). The primary objective was to determine the rate of significant prostate-specific antigen response (ie, decline of ≥ 50%) after 12 weeks of Seviteronel therapy. Results: Seventeen patients, with a median (range) age of 71 (60-92) years, were enrolled, with 8 patients having received prior docetaxel. Patients received a median of 2 cycles of treatment, with most patients discontinuing treatment because of toxicity related to the study drug. The most common adverse events included concentration impairment, fatigue, tremor, and nausea. Despite changes in dosing, the study was closed prematurely because of the high magnitude of toxicity. One (6%) of 17 patients experienced a significant decline in prostate-specific antigen. Conclusion: Seviteronel was not generally well tolerated nor associated with significant clinical responses in patients with mCRPC who had previously received enzalutamide. Further investigation of single-agent Seviteronel in this patient population is not warranted; however, studies investigating Seviteronel with low-dose dexamethasone are ongoing in patients with androgen receptor-positive tumors.
Phase 1 study of Seviteronel, a selective CYP17 lyase and androgen receptor inhibitor, in women with estrogen receptor-positive or triple-negative breast cancer
Breast Cancer Res Treat 2018 Aug;171(1):111-120.PMID:29744674DOI:10.1007/s10549-018-4813-z.
Purpose: Seviteronel (INO-464) is an oral, selective cytochrome P450c17a (CYP17) 17,20-lyase (lyase) and androgen receptor inhibitor with in vitro and in vivo anti-tumor activity. This open-label phase 1 clinical study evaluated safety, tolerability, pharmacokinetics (PK), and activity of once-daily (QD) Seviteronel in women with locally advanced or metastatic TNBC or ER+ breast cancer. Methods: Seviteronel was administered in de-escalating 750, 600, and 450 mg QD 6-subject cohorts. The 750 mg QD start dose was a phase 2 dose determined for men with castration-resistant prostate cancer in (Shore et al. J Clin Oncol 34, 2016). Enrollment at lower doses was initiated in the presence of dose-limiting toxicities (DLTs). The primary objective of this study was to determine Seviteronel safety, tolerability, and MTD. The secondary objectives included description of its PK in women and its initial activity, including clinical benefit rate at 4 (CBR16) and 6 months (CBR24). Results: Nineteen women were enrolled. A majority of adverse events (AEs) were Grade (Gr) 1/2, independent of relationship; the most common were tremor (42%), nausea (42%), vomiting (37%), and fatigue (37%). Four Gr 3/4 AEs (anemia, delirium, mental status change, and confusional state) deemed possibly related to Seviteronel occurred in four subjects. DLTs were observed at 750 mg (Gr 3 confusional state with paranoia) and 600 mg (Gr 3 mental status change and Gr 3 delirium) QD, with none at 450 mg QD. The recommended phase 2 dose (RP2D) was 450 mg QD, and at the RP2D, 4 of 7 subjects reached at least CBR16 (2 TNBC subjects and 2 ER+ subjects achieved CBR16 and CBR24, respectively); no objective tumor responses were reported. Conclusions: Once-daily Seviteronel was generally well tolerated in women with and 450 mg QD was chosen as the RP2D.
Phase I Study of Seviteronel, a Selective CYP17 Lyase and Androgen Receptor Inhibitor, in Men with Castration-Resistant Prostate Cancer
Clin Cancer Res 2018 Nov 1;24(21):5225-5232.PMID:30012563DOI:10.1158/1078-0432.CCR-18-0564.
Purpose: Seviteronel (INO-464) is a selective cytochrome P450c17a (CYP17) 17,20-lyase (lyase) and androgen receptor (AR) inhibitor with antitumor activity in vitro and in vivo This open-label phase I clinical study evaluated the safety, tolerability, pharmacokinetics and activity of once-daily Seviteronel in male chemotherapy-naïve subjects with castration-resistant prostate cancer (CRPC).Patients and Methods: Seviteronel was administered at 600 mg once daily with dose titration (DT) and in modified 3 + 3 dose escalation once-daily cohorts at 600, 750, and 900 mg without DT. The primary objectives of this study were to establish safety, tolerability, and the MTD of Seviteronel in chemotherapy-naïve subjects with or without prior treatment with FDA-approved CRPC treatments, abiraterone acetate (AA), and enzalutamide. Secondary objectives were to assess pharmacokinetics, PSA, tumor response, and endocrine results.Results: Twenty-one subjects were enrolled. No dose-limiting toxicities (DLT) were observed through 750 mg once daily. Most treatment-emergent adverse events (AE) reported at grade 1-2. The most commonly reported AEs were fatigue (71%), dizziness (52%), blurred vision (38%), and dysgeusia (33%), with most AEs improving after dose reduction or dose interruption.Conclusions: Once-daily Seviteronel was generally well tolerated in this phase I study of men with CRPC, a majority of which had progressed on prior AA or enzalutamide, or both. Of the doses evaluated, 600 mg once daily was chosen as the recommended phase II dose for future studies in subjects with CRPC. Clin Cancer Res; 24(21); 5225-32. ©2018 AACR.
A population pharmacokinetic analysis of the oral CYP17 lyase and androgen receptor inhibitor Seviteronel in patients with advanced/metastatic castration-resistant prostate cancer or breast cancer
Cancer Chemother Pharmacol 2019 Oct;84(4):759-770.PMID:31367790DOI:10.1007/s00280-019-03908-0.
Purpose: Seviteronel is an orally-administered selective cytochrome P450c17a 17,20-lyase and androgen receptor inhibitor with anti-tumor activity in vitro and in vivo, and clinical activity in men with advanced castration-resistant prostate cancer (CRPC) and men and women with advanced breast cancer. The purpose of this study was to assess the pharmacokinetics (PK) of Seviteronel across the aforementioned populations. Methods: This report describes the PK of Seviteronel (50-750 mg, QD or BID) using noncompartmental and population approaches from 243 patients with advanced breast or prostate cancer pooled across 4 clinical studies. First dose and steady-state PK were examined, as well as covariates including prandial status, sex and concomitant dexamethasone. Results: Seviteronel PK can be characterized by transit absorption and a bi-phasic first-order elimination while accounting for covariance between random effects. Prandial status did not significantly affect any parameters to a clinically-relevant extent. Both sex and body weight were significant covariates on clearance, explaining 37% of the interindividual variability on that parameter. There were no significant effects from the race or the presence of a corticosteroid (either dexamethasone or prednisone). Conclusions: Seviteronel demonstrates linear PK over the dose range of 50-750 mg given either BID or QD in men with advanced CRPC or men and women with breast cancer. The disposition of Seviteronel following oral administration is well described by this population PK model and can be used for accurate simulations for future studies with body weight and sex affecting clearance, but not to a clinically-meaningful degree requiring a change in the current dosing scheme.