NCT06193993进行中（未招募）1 期
Low-dose 500 mg Abiraterone Acetate in Metastatic Castration-resistant Prostate Cancer (mCRPC) and Metastatic Hormone-sensitive Prostate Cancer (mHSPC) Patients: a Phase I Proof-of-concept Clinical Study
适应症
干预措施
相关药物
试验速览
- 阶段
- 1 期
- 状态
- 进行中（未招募）
- 入组人数
- 10
- 试验地点
- 1
- 主要终点
- Percentage of patients with greater than or equal to 50 percent decrease in Prostate Specific Antigen (PSA) levels
研究概览
简要总结
This will be an open label, Phase I study to assess the efficacy of a reduced 500 mg dose of abiraterone acetate in patients with metastatic prostate cancer. Eligible metastatic hormone-sensitive prostate cancer (mHSPC) and metastatic castration-resistant prostate cancer (mCRPC) patients newly initiated on abiraterone acetate treatment will be recruited to receive a reduced 500 mg dose of abiraterone acetate plus prednisolone. The study treatment duration will span 12 weeks, after which patients being administered the reduced dose will be reverted to the standard 1000 mg dosing. Follow-up for mCRPC and mHSPC patients will last for 18 and 36 months respectively. The main question the study aims to answer is whether dose reduction of abiraterone acetate to 500 mg would achieve antitumor activity in mCRPC and mHPSC patients comparable to standard of care.
详细描述
Primary Objectives:
As a preliminary Phase I trial, the primary objective of the study would be to evaluate the percentage change in prostate specific antigen (PSA) from baseline to 12 weeks.
Secondary Objectives:
- determine the proportion of patients achieving PSA response (≥ 50% reduction in PSA after 12 weeks of therapy).
- evaluate the pharmacokinetics associated with the 500 mg dose of abiraterone acetate.
- investigate the correlation between plasma exposure of abiraterone and CP-I or CP-III in order to support their utility as a biomarker of OATP1B1/1B3 function.
- assess the pharmacodynamic effects of the reduced 500 mg dose on the maximal percentage change in serum androgens (dehydroepiandrosterone (DHEA), dehydroepiandrosterone-sulfate (DHEA-S), testosterone, androstenedione) from baseline.
研究设计
- 研究类型
- Interventional
- 分配方式
- Na
- 干预模型
- Single Group
- 主要目的
- Treatment
- 盲法
- None
入排标准
- 年龄范围
- 21 Years 至 99 Years（Adult, Older Adult）
- 性别
- Male
- 接受健康志愿者
- 否
入选标准
- •Histologically confirmed adenocarcinoma prostate
- •Age >21 years
- •Diagnosis of metastatic castration-resistant prostate cancer (mCRPC) (chemotherapy naïve and chemotherapy pre-treated patients) or metastatic hormone-sensitive prostate cancer (mHSPC)
- •For mCRPC patients, evidence of castration resistance is defined as disease progression despite a testosterone level <50ng/dL (or surgical castration)
- •Progressive disease was defined as either
- •PSA progression according to Prostate Cancer Working Group (PCWG2) criteria15: PSA evidence for progressive prostate cancer consists of a minimum PSA level of at least 2 ng/ml, which has subsequently risen on at least 2 successive occasions, at least 1 week apart
- •Radiographic progression according to RECIST 1.1 guidelines or
- •2 or more new lesions on bone scan
- •Newly initiated on abiraterone acetate therapy
- •Eastern Cooperative Oncology Group (ECOG) performance status grade of 0, 1 or
- •Adequate hematologic, hepatic, and renal function would include:
- •hemoglobin ≥9.0 g/dL independent of transfusions
- •neutrophils ≥1.5 x 109/L
- •platelets ≥100 x 109/L
- •total bilirubin ≤1.5× upper limit of normal (ULN) [except for subjects with documented Gilbert's disease in which case total bilirubin not to exceed 10× ULN]
- •alanine (ALT) and aspartate (AST) aminotransferase ≤2.5X ULN
- •serum creatinine <1.5× ULN or calculated creatinine clearance ≥30 mL/min
- •serum potassium ≥3.5 mmol/L
- •Ability to provide informed consent
排除标准
- •Patients with prior use of enzalutamide or other potent androgen pathway targeted therapies
- •Concurrent therapy with strong inhibitors or inducers of CYP3A4 due to concerning possible drug-drug interactions with abiraterone.
- •Concurrent therapy with strong inhibitors or inducers of OATP transporters (e.g., rifampicin, cyclosporine) due to concerning possible effects on CP-I and CP-III.
- •New York Heart Association (NYHA) class II, NYHA class III, or IV congestive heart failure (any symptomatic heart failure)
- •Uncontrolled hypertension (systolic blood pressure ≥160 mmHg or diastolic BP ≥95 mmHg). Subjects with a history of hypertension are allowed provided blood pressure is controlled by anti-hypertensive treatment
- •Patients who do not voluntarily consent to participate in the study
研究组 & 干预措施
Abiraterone Acetate
Experimental
500 mg dose of Abiraterone Acetate plus prednisolone
干预措施: Abiraterone Acetate (Drug)
结局指标
主要结局
Percentage of patients with greater than or equal to 50 percent decrease in Prostate Specific Antigen (PSA) levels
时间窗: Baseline up to Week 12
次要结局
- Area under the plasma concentration time curve from time 0 to 6 hours (AUC0-6h) of 500 mg dose of Abiraterone Acetate(Pre-dose and 0.5, 1, 2, 3, 4 and 6 hours post-dose on Visit 1 (Week 2 from start of treatment))
- Plasma concentrations of testosterone(Baseline up to Week 12)
- Plasma concentrations of cortisol(Baseline up to Week 12)
- Maximum Plasma Concentration (Cmax) of 500 mg dose of Abiraterone Acetate(Pre-dose and 0.5, 1, 2, 3, 4 and 6 hours post-dose on Visit 1 (Week 2 from start of treatment))
- Time to Reach the Maximum Plasma Concentration (Tmax) of 500 mg dose of Abiraterone Acetate(Pre-dose and 0.5, 1, 2, 3, 4 and 6 hours post-dose on Visit 1 (Week 2 from start of treatment))
- Area under the plasma concentration time curve from time 0 to infinity time (AUC0-inf) of 500 mg dose of Abiraterone Acetate(Pre-dose and 0.5, 1, 2, 3, 4 and 6 hours post-dose on Visit 1 (Week 2 from start of treatment). On Visits 2 (Week 4), 3 (Week 8) and 4 (Week 12) pre-dose)
- Volume of distribution (Vd) of 500 mg dose of Abiraterone Acetate(Pre-dose and 0.5, 1, 2, 3, 4 and 6 hours post-dose on Visit 1 (Week 2 from start of treatment). On Visits 2 (Week 4), 3 (Week 8) and 4 (Week 12) pre-dose)
- Plasma concentrations of androstenedione(Baseline up to Week 12)
- Plasma concentrations of dehydroepiandrosterone-sulfate (DHEA-S)(Baseline up to Week 12)
- Trough plasma concentrations at steady state (Ctrough) of 500 mg dose of Abiraterone Acetate(Baseline up to Week 12)
- Apparent oral clearance (CL/F) of 500 mg dose of Abiraterone Acetate(Pre-dose and 0.5, 1, 2, 3, 4 and 6 hours post-dose on Visit 1 (Week 2 from start of treatment). On Visits 2 (Week 4), 3 (Week 8) and 4 (Week 12) pre-dose)
研究者
研究点 (1)
Loading locations...
相似试验
已完成
2 期
Abiraterone Acetate in Molecular Apocrine Breast CancerBreast CancerNCT01842321UNICANCER34
进行中（未招募）
1 期
ACTION: Abiraterone in Combination with TildrakizumabEUCTR2019-003485-40-GBThe Institute of Cancer Research45
已完成
1 期
Trial of ARV-110 and Abiraterone in Participants With Metastatic Prostate CancerProstate Cancer MetastaticNCT05177042Arvinas Androgen Receptor, Inc.45
已完成
1 期
Safety, Tolerability, Pharmacokinetics, and Preliminary Anti-tumor Activity of Ascending Doses of ARN 509 in Combination With Abiraterone AcetateProstate CancerNCT01792687Aragon Pharmaceuticals, Inc.6
已完成
2 期
Abiraterone Post Ketoconazole for Prostate CancerProstate CancerNCT01199146University of California, San Francisco42