Title
The Evaluation of PC14586 in Patients With Advanced Solid Tumors Harboring a p53 Y220C Mutation (PYNNACLE)
A Phase 1/2 Open-label, Multicenter Study to Assess the Safety, Tolerability, Pharmacokinetics, Pharmacodynamics, and Efficacy of PC14586 in Patients With Advanced Solid Tumors Harboring a p53 Y220C Mutation (PYNNACLE)
Phase
Phase 1/Phase 2Lead Sponsor
PMV Pharmaceuticals, IncStudy Type
InterventionalStatus
RecruitingIntervention/Treatment
PC14586 ...Study Participants
181This study will assess the safety, tolerability, and efficacy of multiple dose levels of PC14586 alone and in combination with pembrolizumab in participants with advanced solid tumors containing a TP53 Y220C mutation.
PC14586 is a first-in-class, oral, small molecule p53 reactivator that is selective for the TP53 Y220C mutation.
The primary objective of Phase 1 monotherapy is to establish the maximum tolerated dose (MTD) and recommended Phase 2 dose (RP2D) of PC14586. Secondary objectives are to characterize the pharmacokinetic (PK) properties, safety and tolerability, and to assess preliminary efficacy including overall response rate (ORR).
The primary objective of Phase 1b Combination Therapy Treatment Arm is to establish the MTD/RP2D of PC14586 when administered in combination with pembrolizumab. Secondary objectives of Phase 1b Combination Therapy Treatment Arm are to characterize PK, safety and tolerability, and to assess preliminary efficacy of PC14586 when administered in combination with pembrolizumab, including ORR.
The primary objective of Phase 2 monotherapy is to assess the ORR as determined by blinded independent central review. Secondary objectives of include the safety, PK properties, quality of life, and other efficacy measures of PC14586 at the RP2D.
First-in-class, oral, small molecule p53 reactivator selective for the p53 Y220C mutation.
Participants receive pembrolizumab 200 mg by intravenous (IV) infusion over 30 minutes.
Multiple dose levels of daily oral PC14586 will be evaluated in an escalating manner, to determine the maximum tolerated dose and to ensure sufficient safety experience, pharmacokinetic information, and early evidence of clinical activity of PC14586 to recommend a Phase 2 dose (RP2D).
Additional (expansion of) participants will enroll at the RP2D of daily oral PC14586 for continued evaluation. Cohort A participants will have advanced solid tumors harboring a p53 Y220C mutation who meet all eligibility criteria and have measurable disease per RECIST 1.1.
Additional (expansion of) participants will enroll at the RP2D of daily oral PC14586 for continued evaluation. Cohort B participants will have advanced solid tumors harboring a p53 Y220C mutation who do not meet all eligibility criteria (e.g. have a primary central nervous system (CNS) tumor) and do not have measurable disease per RECIST 1.1.
Multiple dose levels of daily oral PC14586 in combination with a stable dose of pembrolizumab (200 mg IV q3 weeks) will be evaluated in an escalating manner, to determine the maximum tolerated dose and to ensure sufficient safety experience, pharmacokinetic information, and early evidence of clinical activity of PC14586 to recommend a Phase 2 dose (RP2D) of PC14586 when administered in combination with pembrolizumab.
Additional (expansion of) participants will enroll at the RP2D of daily oral PC14586 when administered in combination with pembrolizumab (200 mg IV q3 weeks) for continued evaluation. Participants will have advanced solid tumors harboring a p53 Y220C mutation and are PD(L)-1 naive patients.
Additional (expansion of) participants will enroll at the RP2D of daily oral PC14586 when administered in combination with pembrolizumab (200 mg IV q3 weeks) for continued evaluation. Participants will have advanced solid tumors harboring a p53 Y220C mutation and are PD(L)-1 relapsed/refractory patients.
Inclusion Criteria: At least 18 years of age or 12 to 17 years of age after adequate adult safety data become available Advanced solid malignancy with a TP53 Y220C mutation Eastern Cooperative Oncology Group (ECOG) status of 0 or 1 Previously treated with one or more lines of anticancer therapy and progressive disease Adequate organ function Additional Criteria for Inclusion in Phase 1b (PC14586 + pembrolizumab combination) Anti-PD-1/PD-L1 naive or must have progressed on treatment Measurable disease Exclusion Criteria: Anti-cancer therapy within 21 days (or 5 half-lives) of receiving the study drug Radiotherapy within 28 days of receiving the study drug Primary CNS tumor (Phase 1, Phase 2 Cohort A) History of leptomeningeal disease or spinal cord compression Brain metastases, unless neurologically stable and do not require steroids to treat associated neurological symptom Stroke or transient ischemic attack within 6 months prior to screening Heart conditions such as unstable angina, uncontrolled hypertension, a heart attack within 6 months prior to screening, congestive heart failure, prolongation of QT interval, or other rhythm abnormalities Strong CYP3A4 inhibitors or inducers, medications with a known risk of QT/QTc prolongation, or proton pump inhibitors History of gastrointestinal (GI) disease that may interfere with absorption of study drug or patients unable to take oral medication History of prior organ transplant Known, active malignancy, except for treated cervical intraepithelial neoplasia, or non-melanoma skin cancer Known, active uncontrolled Hepatitis B, Hepatitis C, or human immunodeficiency virus infection Additional Criteria for Exclusion from Phase 1b (PC14586 + pembrolizumab combination) Received prior therapy with an anti-PD-1, anti-PD-L1, or anti-PD-L2 agent or with an agent directed to another stimulatory or co-inhibitory T-cell receptor and discontinued from that treatment due to a Grade 3 or higher immune-related AE (irAE). Received a live or live-attenuated vaccine within 30 days prior to the first dose of study intervention. Diagnosis of immunodeficiency or receiving chronic systemic steroid therapy within 7 days prior to the first dose of study drug. Hypersensitivity (≥ Grade 3) to pembrolizumab and/or any of its excipients. Active autoimmune disease that has required systemic treatment in past 2 years. History of radiation pneumonitis. History of (non-infectious) or active pneumonitis / interstitial lung disease that required steroids Active infection requiring systemic therapy. Known history of HIV infection.
