Primary Outcome Measures:
- Part 1: Safety assessment as assessed by adverse events (AEs) and serious adverse events (SAEs) [ Time Frame: From Day 1 till post study visit (approximately 21 days from last dose) ] [ Designated as safety issue: No ]
AEs and SAEs will be assessed to determine the MTD and RP2D combination of GSK2256098 and trametinib. - Part 1: Safety assessment as assessed by 12-lead electrocardiogram (ECG) [ Time Frame: Screening, Day 1, Day 15, Day 22, and every 8 weeks from first dose till post study visit (approximately 21 days from last dose) ] [ Designated as safety issue: No ]
Twelve lead ECGs will be obtained to determine the MTD and RP2D combination of GSK2256098 and trametinib. - Part 1: Safety assessment as assessed by vital signs [ Time Frame: From Day 1 till post study visit (approximately 21 days from last dose) ] [ Designated as safety issue: No ]
Vital sign measurements will include systolic and diastolic blood pressure, pulse rate, and temperature - Part 1: Safety assessment as assessed by change from baseline in laboratory values [ Time Frame: From Day 1 till post study visit (approximately 21 days from last dose) ] [ Designated as safety issue: No ]
Clinical laboratory assessments will include hematology, clinical chemistry, routine urinalysis and additional parameters - Part 1: Safety assessment as assessed by echocardiogram [ Time Frame: Screening, Day 28 and Day 1 of Weeks 13, 21, 33, then every 12 weeks. ] [ Designated as safety issue: No ]
Echocardiograms will be performed to assess cardiac ejection fraction. - Part 1: Safety assessment as assessed by eye examination [ Time Frame: Screening and as clinically warranted ] [ Designated as safety issue: No ]
A standard ophthalmic exam will be performed by an ophthalmologist. - Part 1: Safety assessment as assessed by urine protein to creatinine (UPC) ratio [ Time Frame: From Day 1 till post study visit (approximately 21 days from last dose) ] [ Designated as safety issue: No ]
Urine samples will be collected for the analyses of UPC ratio. - Part 2: Long term safety assessment as assessed by AEs and SAEs [ Time Frame: From Day 1 till post study visit (approximately 21 days from last dose) ] [ Designated as safety issue: No ]
AEs and SAEs will be recorded to assess longer term safety of the GSK2256098/trametinib combination at the RP2D in a larger cohort of subjects with MPM. - Part 2: Long term safety assessment as assessed by 12-lead ECG [ Time Frame: Screening, Day 1, Day 15, Day 22, and every 8 weeks from first dose till post study visit (approximately 21 days from last dose) ] [ Designated as safety issue: No ]
Twelve lead ECGs will be obtained to assess longer term safety of the GSK2256098/trametinib combination at the RP2D in a larger cohort of subjects with MPM - Part 2: Long term safety assessment as assessed by vital signs [ Time Frame: From Day 1 till post study visit (approximately 21 days from last dose) ] [ Designated as safety issue: No ]
Vital sign measurements will include systolic and diastolic blood pressure, pulse rate, and temperature - Part 2: Long term safety assessed as change from baseline in laboratory values [ Time Frame: From Day 1 till post study visit (approximately 21 days from last dose) ] [ Designated as safety issue: No ]
Clinical laboratory assessments will include hematology, clinical chemistry, routine urinalysis and additional parameters - Part 2: Long term safety assessment as assessed by echocardiogram [ Time Frame: Screening, Day 28 and Day 1 of Weeks 13, 21, 33, then every 12 weeks. ] [ Designated as safety issue: No ]
Echocardiograms will be performed to assess cardiac ejection fraction. - Part 2: Long term safety assessment as assessed by eye examination [ Time Frame: Screening and as clinically warranted ] [ Designated as safety issue: No ]
A standard ophthalmic exam will be performed by an ophthalmologist. - Part 2: Long term safety assessment as assessed by UPC ratio [ Time Frame: From Day 1 till post study visit (approximately 21 days from last dose) ] [ Designated as safety issue: No ]
Urine samples will be collected for the analyses of UPC ratio.
Secondary Outcome Measures:
- Part 1: GSK2256098 and trametinib PK assessment following repeat-dose (Day 15) administration of GSK2256098 and trametinib [ Time Frame: Day 15 (pre-dose, 1, 1.5, 2, 4, 6, 8 hours) ] [ Designated as safety issue: No ]
Blood sample will be collected for measurements of GSK2256098 and trametinib PK parameters including AUC(0-tau), Ctau, Cmax, and tmax. - Part 1: Tumor response and analysis of change from baseline levels of PD markers including pFAK/FAK, and pERK/ERK measured in tumor biopsies [ Time Frame: Screening (before the first dose on Day 1), Day 15 and 22 ] [ Designated as safety issue: No ]
PD markers pFAK/FAK, and pERK/ERK levels will be analyzed in fresh tumor tissue to assess the level of target inhibition by GSK2256098 and trametinib, respectively. Tumor tissue will be collected at screening (before the first dose on Day 1) and between 1 and 6 hours after GSK2256098 dosing on a day between Day 15 and Day 22, inclusive. - Part 2: Tumor response as measured by modified Response Evaluation Criteria In Solid Tumors (RECIST) for mesothelioma [ Time Frame: Screening, Every 8 weeks from first dose and at progression and post study (approximately 21 days from last dose) ] [ Designated as safety issue: No ]
CT and MRI scans. - Part 2: Change from baseline in observer assessed components of the Lung cancer symptom scale (LCSS)-mesothelioma [ Time Frame: Screening, Every 8 weeks from first dose and at progression and post study (approximately 21 days from last dose) ] [ Designated as safety issue: No ]
The LCSS- mesothelioma is a disease- and site-specific quality of life instrument to measure physical and functional dimensions in patients with lung cancer. The LCSS- mesothelioma will be completed by the investigator at each scheduled disease assessment and at progression. - Part 2: Change from baseline in forced vital capacity [ Time Frame: Screening, Every 8 weeks from first dose and at progression and post study (approximately 21 days from last dose) ] [ Designated as safety issue: No ]
Forced vital capacity will be measured at each scheduled disease assessment using standard methods. - Part 2: Progression-free survival (PFS) [ Time Frame: Day 1 up to disease progression or death due to any cause ] [ Designated as safety issue: No ]
PFS is defined as the interval between first dose and the earliest date of disease progression or death due to any cause by investigator assessment. - Part 2: Change from baseline in patient reported components of the LCSS-mesothelioma [ Time Frame: Baseline and every 8 weeks from first dose till disease progression and post study (21 days from last dose) ] [ Designated as safety issue: No ]
The LCSS- mesothelioma is a disease- and site-specific quality of life instrument to measure physical and functional dimensions in patients with lung cancer. The LCSS- mesothelioma will be completed by the by the subjects with mesothelioma at each scheduled disease assessment and at progression. - Part 2: GSK2256098 and trametinib PK parameters following repeat-dose (Day 22) administration of GSK2256098 and trametinib [ Time Frame: Day 8 (pre-dose), 15 (pre-dose),22 (pre-dose, 1, 1.5,2,4,6 and 8 hrs), 29 and 57 ] [ Designated as safety issue: No ]
Blood samples will be collected to analyze the PK parameters including AUC (0 tau), Ctau, Cmax, and tmax . If data permitting, population PK parameters, such as oral clearance (CL/F) and oral volume of distribution (Vz/F) of GSK2256098 and trametinib may be determined. - Part 2: Exploratory analysis between PK parameters, change from baseline levels of PD markers including pFAK/FAK, pERK/ERK measured in tumor biopsies, and tumor response [ Time Frame: Day 8, 15, 22, 29, and 57 ] [ Designated as safety issue: No ]
The relationship between GSK2256098 and trametinib PK, PD and clinical endpoints in subjects with MPM will be assessed. - Part 1 and 2: GSK2256098 dried blood spot (DBS) and whole blood PK parameter following repeat-dose (Day15 and 22) administration of GSK2256098 and trametinib [ Time Frame: Day 15 and 22 ] [ Designated as safety issue: No ]
Blood samples will be collected to analyses PK parameters includes area under the concentration-time curve from time zero (pre-dose) to last time of quantifiable concentration within a subject across all treatments [AUC(0-tau)], maximum observed plasma concentration (Cmax), time to Cmax (tmax), and trough concentration (Ctau) of GSK2256098 DBS and whole blood following repeat-dose (Day15 and 22) administration of GSK2256098 and trametinib.
Eligibility Criteria
Inclusion Criteria
Part 1 Subject Inclusion Criteria:
- Subjects with measurable tumors that may benefit from treatment with GSK2256098 and trametinib. This includes mesothelioma along with tumors with a high likelihood of MAPK pathway activation as reported in the medical literature.
Part 2 Subject Inclusion Criteria:
- Histologically- or cytologically- confirmed diagnosis of recurrent or progressive, unresectable MPM with measurable lesion.
Part 1 and Part 2 Subject Inclusion Criteria:
- Written informed consent provided.
- Males and females >=18 years of age (at the time consent is obtained).
- Performance Status score of 0 or 1 according to the Eastern Cooperative Oncology Group (ECOG) scale.
- Able to swallow and retain orally administered study treatment.
- Women of childbearing potential must have a negative serum pregnancy test within 7 days prior to the first dose of study treatment and agree to use effective contraception as per study protocol specification. Men with a female partner of childbearing potential must have either had a prior vasectomy or agree to use effective contraception as as per study protocol specification.
- Adequate organ system functions as defined in the protocol
Exclusion Criteria
- Mesotheliomas originating outside of the pleural cavity (e.g., peritoneal mesothelioma) are excluded in the Pharmacodynamic Cohort in Part 1 and Part 2, but are permitted in Dose Escalation Cohorts in Part 1.
- Subjects with leptomeningeal or brain metastases or spinal cord compression.
- Use of an investigational anti-cancer drug within 28 days or five half-lives with a minimum duration of 10 days from prior therapy preceding the first dose of GSK2256098/trametinib OR Chemotherapy within the last 3 weeks (6 weeks for prior nitrosourea or mitomycin C) OR any major surgery, radiotherapy, or immunotherapy within the last 4 weeks. NOTE: Limited palliative radiation (i.e., duration typically < 15 days) with last dose >=6 weeks preceding the first dose of combination treatment is acceptable provided subject meets all of the other eligibility criteria and radiotherapy port does not encompass all measurable tumor. In addition, prophylactic radiation therapy to the site of tumor biopsies (as per the standard of care) during the current study to prevent seeding of the needle tract/biopsy is acceptable and does not require dose modification.
- Known immediate or delayed hypersensitivity reaction or idiosyncrasy to drugs chemically related to GSK2256098 or trametinib.
- Previous treatment with GSK2256098 or trametinib, as well as other MEK or FAK inhibitors.
- Current use of a prohibited medication or requires any of these medications during treatment.
- Current use of warfarin for therapeutic anticoagulation. NOTE: Low molecular weight heparin is permitted. PT/PTT must meet the inclusion criteria.
- Presence of an active gastrointestinal disease, or other condition known to interfere significantly with the absorption, distribution, metabolism, or excretion of drugs.
- History or evidence of cardiovascular risk including any of the following: Left ventricle ejection fraction (LVEF) < lower limit of normal (LLN) per local institutional practice; A QT interval corrected for heart rate using the Fredericia’s formula (QTcF) >=480 msec;History or evidence of current clinically significant uncontrolled arrhythmias; Exception: Subjects with controlled atrial fibrillation for >30 days prior to randomization are eligible; History of acute coronary syndromes (including myocardial infarction and unstable angina), coronary angioplasty, or stenting within 6 months prior to randomization; History or evidence of current >= Class II congestive heart failure as defined by New York Heart Association; Treatment refractory hypertension defined as a blood pressure of systolic> 140 millimeter of mercury (mmHg) and/or diastolic > 90 mmHg which cannot be controlled by anti-hypertensive therapy; Patients with intra-cardiac defibrillators or permanent pacemakers; Known cardiac metastases;
- Active interstitial lung disease or pneumonitis.
- History or current evidence / risk of retinal vein occlusion (RVO) or central serous retinopathy (CSR): History of RVO or CSR, or predisposing factors to RVO or CSR (e.g., uncontrolled glaucoma or ocular hypertension, uncontrolled systemic disease such as hypertension, diabetes mellitus, or history of hyperviscosity or hypercoagulability syndromes); Visible retinal pathology as assessed by ophthalmic exam that is considered a risk factor for RVO or CSR such as: Evidence of new optic disc cupping, Evidence of new visual field defects and Intraocular pressure > 21 mmHg
- Known Human Immunodeficiency Virus (HIV), Hepatitis B Virus (HBV), or Hepatitis C Virus (HCV) infection (subjects with laboratory evidence of cleared HBV and HCV infection will be permitted).
- History of another malignancy (excludes non-melanoma skin cancer). Exception: Subjects who have been continuously disease-free for 3 years or who have had complete resection of a non-invasive primary cancer within 3 years of enrollment. Consult GSK Medical Monitor if unsure whether second malignancies meet requirements specified above.
- Psychological, familial, sociological, or geographical conditions that do not permit compliance with the protocol.
- Concurrent condition that in the Investigator’s opinion would jeopardize compliance with the protocol.
- Nursing female.
