NCT02698176 - A Dose Exploration Study With Birabresib (MK-8628) in Participants With Selected Advanced Solid Tumors (MK-8628-006) | Crick

Eligibility

Sex: ALLMin age: 18 Years

Medical Language ↔ Plain English

Inclusion Criteria: * Males and females ≥18 years of age for NSCLC, TNBC, and CRPC * Males and females ≥16 years of age for NMC * Diagnosis of one of the following advanced solid tumors for which standard therapy either does not exist or has proven ineffective, intolerable or inacceptable for the participant: NMC;TNBC; NSCLC; or CRPC * Have at least 1 measurable lesion per Response Evaluation Criteria in Solid Tumors (RECIST) 1.1. CRPC participants may be enrolled with objective evidence of disease as per Prostate Cancer Working Group (PCWG2) criteria * Life expectancy ≥3 months * Eastern Cooperative Oncology Group (ECOG) Performance Status ≤1 * Have an interval of ≥3 weeks (or ≥2 weeks for NMC participants) since chemotherapy (≥6 weeks for nitrosoureas or mitomycin C), immunotherapy, hormone therapy or any other anticancer therapy or surgical intervention resection, or ≥3 half-lives for monoclonal antibodies, or ≥5 half-lives for other non-cytotoxic agents (whichever is longer) * CRPC participants must maintain ongoing androgen deprivation therapy with a gonadotropin releasing hormone (GnRH) analogue, antagonist or orchiectomy providing serum testosterone is \<50 ng/dL (\<1.7 nmol/L) * Participants receiving bisphosphonate or denosumab therapy must be on stable doses for at least 4 weeks before start of study therapy * Females must not be pregnant (negative urine or serum human chorionic gonadotropin test within 72 hours of study start) * Females of childbearing potential and male participants must agree to use adequate contraception starting with the first dose of trial treatment through 90 days after the last dose of study medication Exclusion Criteria: * Has inability to swallow oral medications or presence of a gastrointestinal disorder (e.g. malabsorption) deemed to jeopardize intestinal absorption of birabresib * Has persistent grade \>1 clinically significant toxicities related to prior antineoplastic therapies (except for alopecia). Stable sensory neuropathy ≤ grade 2 National Cancer Institute (NCI) - Common Terminology Criteria for Adverse Events (CTCAE) Version 4.0 is accepted * Known primary central nervous system (CNS) malignancy or symptomatic or untreated CNS metastases. Treated and stable CNS metastases are allowed. * History of prior or concomitant malignancies within 3 years of study start * Have other serious illness or medical condition, such as active infection, unresolved bowel obstruction, psychiatric disorders, or cerebrovascular accident within 1 year of study start * Known human immunodeficiency virus (HIV) and/or active Hepatitis B or C infections * Have one of the following cardiac-related conditions: Congestive heart failure or angina pectoris (except if medically controlled); myocardial infarction (within 1 year of study start); uncontrolled hypertension; or uncontrolled arrhythmias * Other concomitant anticancer treatment * Participation in another clinical trial or treatment with any investigational drug (excluding anticancer treatments) within 30 days of study start * Concomitant therapy with strong CYP3A4 inhibitors or inducers * Therapeutic anticoagulation (e.g. warfarin, heparin, etc.) must be stopped at least 7 days prior to the first dose of birabresib. Low-dose low molecular weight heparin (LMWH) is permitted * Is pregnant or breast-feeding

Outcomes

Primary Outcomes

Number of Participants Who Experienced a Dose Limiting Toxicity (DLT) During Cycle 1

A DLT was any of the following deemed drug related (DR) by investigator: Grade (G)4 hematologic toxicity lasting ≥7 days except thrombocytopenia; G4 thrombocytopenia; G3 thrombocytopenia with bleeding; G3 or 4 febrile neutropenia. G4 non-hematologic (NH) toxicity (not laboratory); G3 NH toxicity (not laboratory), nausea, vomiting, or diarrhea lasting \>3 days despite supportive care; G3 or 4 NH laboratory abnormality requiring medical intervention, hospitalization, or persisting \>1 week; alanine aminotransferase (ALT) or aspartate aminotransferase (AST) \>8X Upper Limit of Normal(ULN); ALT or AST \>5XULN for \>2 weeks; ALT or AST \>3XULN and total bilirubin \>2XULN or international normalization ratio \>1.5; ALT or AST \>3XULN with fatigue, nausea, vomiting, right upper quadrant pain or tenderness, fever, rash and/or eosinophilia (\>5%); DR adverse event leading to discontinuation or \>20% missed planned doses in Cycle 1; DR toxicity causing \>2 week delay in starting Cycle 2; or G5 toxicity.

Time frame: From time of first dose up to the end of the first cycle (up to 21 days)

Secondary Outcomes

Number of Participants Who Experienced at Least One Adverse Event (AE)

An AE was defined as any untoward medical occurrence in a participant administered a pharmaceutical product and which did not necessarily have to have a causal relationship with this treatment. An AE could therefore be any unfavorable and unintended sign, symptom, or disease temporally associated with the use of a medicinal product/protocol-specified procedure, whether or not considered related to the medicinal product/protocol-specified procedure. Any worsening of a preexisting condition temporally associated with the use of the product was also an AE. The number of participants who experienced at least one AE is presented.

Time frame: From time of first dose until the end of the 30-day follow-up (up to 25 months)

Number of Participants Who Discontinued Study Treatment Due to an AE

The number of participants who discontinued study treatment due to an AE is presented.

Time frame: From time of first dose until the end of treatment (up to 24 months)

Objective Response Rate (ORR)

ORR was defined as the percentage of the participants in the analysis population who had a Complete Response (CR: Disappearance of all target lesions Response Evaluation Criteria in Solid Tumors \[RECIST\] 1.1) or a Partial Response (PR: At least a 30% decrease in the sum of diameters of target lesions per RECIST 1.1) and lack of progression according to the guidelines for prostate cancer endpoints developed by Prostate Cancer Clinical Trials Working Group (PCWG) 2 as assessed by investigator radiologic review. The number of participants who achieved a CR or PR is presented.

Time frame: Assessed every 6 weeks from time of first dose until disease progression (up to 24 months)

Duration of Response (DOR)

For participants who demonstrated CR or PR, DOR was defined as the time from first documented evidence of CR or PR per RECIST 1.1 until disease progression per RECIST 1.1 and PCWG2 or death due to any cause, whichever occurred first. Per RECIST 1.1, progressive disease was defined as at least a 20% increase in the sum of diameters of target lesions. In addition to the relative increase of 20%, the sum must also have demonstrated an absolute increase of at least 5 mm. Note: The appearance of one or more new lesions was also considered progression per RECIST 1.1. Per PCWG2, progressive disease was defined as a confirmed increase of at least two new lesions on a bone scan. DOR assessments were assessed by investigator radiologic review. The DOR for all participants who experienced a CR or PR is presented.

Time frame: Assessed every 6 weeks from time of first dose until disease progression (up to 24 months)

Disease Control Rate (DCR)

DCR was defined as the number of subjects with CR, PR, or stable disease (SD) as assessed by investigator radiologic review according to RECIST version 1.1 and PCWG2. CR: defined as disappearance of all target and all non-target lesions and any pathological lymph nodes (whether target or non-target) must have reduction in short axis to less than \<10 mm per RECIST 1.1. PR: defined as at least a 30% decrease in sum of diameters of target lesions, taking as reference the baseline sum diameters along with absence of new lesions and disease progression in non-target lesions per RECIST 1.1. SD: defined as, neither sufficient shrinkage to qualify for PR, nor sufficient increase to qualify for PD, taking as reference the smallest sum diameters while on study per RECIST 1.1 and lack of a confirmed increase of at least two new lesions on a bone scan per PCWG2. The number of participants who experienced DCR is presented.

Time frame: Assessed every 6 weeks from time of first dose until disease progression (up to 24 months)

Observed Maximum Concentration (Cmax) of MK-8628

Blood samples were obtained at specified time points for the pharmacokinetic (PK) analysis of Cmax of MK-8628. MK-8628 concentrations were analyzed using ultra-performance liquid chromatography coupled with a tandem mass spectrometry. The Cmax of MK-8628 after oral administration is presented.