A Phase 2, Safety and Efficacy Study of PRT3789 in Combination With Pembrolizumab in Patients With Advanced or Metastatic Solid Tumors With a SMARCA4 Mutation
试验速览
- 阶段
- 2 期
- 状态
- 终止
- 入组人数
- 6
- 试验地点
- 9
- 主要终点
- Safety and tolerability of PRT3789 in combination with pembrolizumab as measured by incidence of DLTs (Part 1)
研究概览
简要总结
This is a Phase 2 an open-label, multi-center study to determine the safety, tolerability, efficacy, pharmacokinetics, pharmacodynamics, and anti-tumor activity of PRT3789 in combination with pembrolizumab in patients with advanced, recurrent or metastatic solid tumors with a SMARCA4 mutation.
详细描述
This is an open-label, multi-center Phase 2 study of PRT 3789, a first-in-class SMARCA2 targeted protein degrader, in combination with pembrolizumab, a potent humanized immunoglobulin G4 (IgG4) monoclonal antibody (mAb) with high specificity of binding to the programmed cell death 1 (PD-1) receptor, evaluating patients with Advanced or Metastatic Solid Tumors with a SMARCA4 Mutation. This study consists of 2 parts. Part 1 is a safety run-in and will establish the dose of PRT3789 to be used in combination with pembrolizumab in the main study (Part 2). For Part 2 (Main study) primary endpoints are ORR (defined as the proportion of patients with a confirmed best overall response of either complete response or partial response) and duration of response per investigator assessment per RECIST v1.1.
Approximately 46 to 60 patients will be enrolled in Part 1 and Part 2 based on the dose of PRT3789 selected/cleared during the safety run-in.
研究设计
- 研究类型
- Interventional
- 分配方式
- Na
- 干预模型
- Sequential
- 主要目的
- Treatment
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 65+ years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Patients who are willing and able to comply with all scheduled visits, treatment plan, laboratory tests, lifestyle considerations and other study procedures, including providing informed consent.
- •Patients must either progress on standard of care therapy or be ineligible for standard of care therapy in order to be eligible for enrollment on the study.
- •Part 1 Safety Run-in: Patients with advanced, recurrent, or metastatic histologically or cytologically confirmed solid tumor malignancy and any mutation of SMARCA4 detected by next generation sequencing in tumor tissue or blood, or absence of SMARCA4 protein (BRG1). Part 2 Main Study: Patients with advanced, recurrent, or metastatic histologically confirmed esophageal cancer or NSCLC and have a deleterious SMARCA4 mutation, or absence of SMARCA4 protein (BRG1) detected by immunohistochemistry in tumor tissue using a clinically validated laboratory test.
- •Part 1 Run-in: Measurable or non-measurable (but evaluable) disease per RECIST v1.1 as assessed by the local site investigator/radiologist. Part 2 Main Study: Measurable disease per RECIST v1.1 as assessed by the local site investigator/radiologist. Lesions situated in a previously irradiated area are considered measurable if progression has been shown in such lesions.
- •Willingness and ability to provide tumor tissue (i.e., archived or fresh tumor biopsy if archived tumor tissue is unavailable)
- •Adequately controlled blood pressure with or without antihypertensive medications.
- •Patients with HIV must have well-controlled HIV on antiretroviral therapy.
- •Adequate organ function
排除标准
- •Patients who have adverse events due to previous anticancer therapies and/or complications from prior surgical intervention must have recovered to ≤ Grade 1 or baseline before starting study treatment. Patients with endocrine-related AEs who are adequately treated with hormone replacement or patients who have ≤ Grade 2 neuropathy are eligible.
- •Other acute or chronic medical or psychiatric conditions that would make the patient inappropriate for entry into this study.
- •Patients with solid tumors with a known concomitant SMARCA2 mutation or loss of protein expression.
- •Uncontrolled or symptomatic central nervous system (CNS) metastases or leptomeningeal disease and/or carcinomatous meningitis).
- •History of or current (noninfectious) pneumonitis/interstitial lung disease
- •Diagnosis of immunodeficiency disease/disorder.
- •Known additional malignancy that is progressing or has required active treatment within the past 3 years.
- •Patients who received prior treatment with an agent directed to a stimulatory or co-inhibitory T-cell receptor.
- •Currently taking a strong or moderate CYP3A4 inhibitor or inducer and St. John's Wort and are unable to discontinue use within 15 days of the first dose of study treatment.
- •Receipt of any targeted therapy directed against BRM/BRG1 (SMARCA2/SMARCA4).
- •Pregnant or breastfeeding or plan to become pregnant during the duration of the study.
研究组 & 干预措施
PRT3789/Pembrolizumab combination
PRT3789 is administered as an intravenous infusion once weekly for 3 weeks; Pembrolizumab is administered at 200 mg as an intravenous infusion over 30 min every 3 weeks
干预措施: PRT3789 (Drug)
PRT3789/Pembrolizumab combination
PRT3789 is administered as an intravenous infusion once weekly for 3 weeks; Pembrolizumab is administered at 200 mg as an intravenous infusion over 30 min every 3 weeks
干预措施: pembrolizumab (Drug)
结局指标
主要结局
Safety and tolerability of PRT3789 in combination with pembrolizumab as measured by incidence of DLTs (Part 1)
时间窗: Baseline through completion of study, an average of 2 years
Safety and tolerability will be evaluated by incidence of dose-limiting toxicities (DLTs)
Safety and tolerability of PRT3789 in combination with pembrolizumab as measured by incidence and severity of AEs according to NCI CTCAE (Part 1)
时间窗: Baseline through study completion, an average of 2 years
Safety and tolerability will be evaluated by incidence and severity of adverse events (AEs) according to National Cancer Institute Common Terminology Criteria for Adverse Events (NCI CTCAE)
Efficacy of PRT3789 in combination with pembrolizumab in patients with advanced or metastatic esophageal or NSCLC and deleterious SMARCA4 mutation: Objective Response Rate (Part 2)
时间窗: Baseline through study completion, an average of 2 years
Objective response rate defined as the proportion of patients with a confirmed best overall response of either complete response or partial response, as determined per investigator assessment by RECIST v1.1
Efficacy of PRT3789 in combination with pembrolizumab in patients with advanced or metastatic esophageal or NSCLC and deleterious SMARCA4 mutation: Duration of Response (Part 2)
时间窗: Baseline through study completion, an average of 2 years
Duration of response defined as the time from the date of the first documented response (complete response or partial response) to the earliest date of disease progression, as determined per investigator assessment by RECIST v1.1, or death due to any cause
次要结局
- Efficacy of PRT3789 in combination with pembrolizumab: Objective Response Rate (Part 1)(Baseline through study completion, an average of 2 years)
- Efficacy of PRT3789 in combination with pembrolizumab: Duration of Response (Part 1)(Baseline through study completion, an average of 2 years)
- Efficacy of PRT3789 in combination with pembrolizumab (part 1 and part 2): Clinical Benefit Response(Baseline through study completion, an average of 2 years)
- Efficacy of PRT3789 in combination with pembrolizumab (part 1 and part 2): Progression-Free Survival(Baseline through study completion, an average of 2 years)
- Efficacy of PRT3789 in combination with pembrolizumab (part 1 and part 2): Overall Survival(Baseline through study completion, an average of 2 years)
- Safety and tolerability of PRT3789 in combination with pembrolizumab as measured by AEs according to NCI CTCAE(Baseline through study completion, an average of 2 years)
- Safety and tolerability of PRT3789 in combination with pembrolizumab: as measured by key clinical laboratory parameters(Baseline through study completion, an average of 2 years)
- Safety and tolerability as measured by incidence of dose modification due to AEs(Baseline through study completion, an average of 2 years)
- PK profile of PRT3789 in combination with pembrolizumab: Maximum observed plasma concentration: Maximum observed plasma concentration(Baseline through study completion, an average of 2 years)
- PK profile of PRT3789 in combination with pembrolizumab: Area under the curve(Baseline through study completion, an average of 2 years)
- PK profile of PRT3789 in combination with pembrolizumab: Time of maximum concentration (Tmax) and half-life (T1/2)(Baseline through study completion, an average of 2 years)
研究者
Clinical Medical Lead
Scientific
Prelude Therapeutics Inc.