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GSK2118436

Phase 3

Cancer | Small molecule | Oncology |GSK plc|Last Updated: Nov 13, 2017

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
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Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
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Trial Design
RandomizedCONTROLLEDDMCBiomarker
Total Trials6
Total Enrollment493
FDA Designations
No designations recorded
Clinical Trials (6)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT01227889A Study Comparing GSK2118436 to Dacarbazine (DTIC) in Previously Untreated Subjects With BRAF Mutation Positive Advanced (Stage III) or Metastatic (Stage IV) MelanomaPHASE3 COMPLETED 251Dec 23, 2010Sep 16, 2016Oct 4, 201794 United States, Australia +10
NCT01738451A Study to Evaluate the Effect of Repeat Oral Dosing of GSK2118436 on Cardiac Repolarization in Subjects With V600 BRAF Mutation-Positive TumorsPHASE1 COMPLETED 50Jan 22, 2013Nov 28, 2014Nov 13, 20178 United States, Australia +1
NCT01582997A Phase I Study to Investigate the Safety, Tolerability and Pharmacokinetic Profile of of GSK2118436 in Japanese Subjects With BRAF Mutation Positive Solid TumorsPHASE1 COMPLETED 12May 11, 2012Apr 16, 2015Nov 13, 20172 Japan
NCT01340833Determination of the Absolute Bioavailability of GSK2118436 Following a Single Oral Dose Co-Administered With an Intravenous Radiolabelled Microtracer of GSK2118436 in Subjects With BRAF Mutant Solid TumorsPHASE1 COMPLETED 6Jun 8, 2011Sep 12, 2011Nov 13, 20171 United States
NCT01262963An Absorption, Distribution, Metabolism and Excretion (ADME) Study of Single Oral Dose [14C] GSK2118436 in Subjects With BRAF Mutant Solid TumorsPHASE1 COMPLETED 4Jan 26, 2011Apr 8, 2011Nov 13, 20171 United States
NCT00880321A Phase I Study to Investigate the Safety, Pharmacokinetics, and Pharmacodynamics of GSK2118436 in Subjects With Solid TumorsPHASE1 COMPLETED 170Jun 4, 2009Mar 20, 2012Nov 13, 20178 United States, Australia
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Study Endpoints
Primary Endpoints
Progression-free Survival (PFS) as Assessed by the Investigator
Time interval between the date of randomization and the earlier of the date of disease progression or the date of death due to any cause (up to 9.9 months)

PFS is defined as the interval of time between the date of randomization and the earlier of the date of disease progression or the date of death due to any cause. Disease progression was based on radiographic or photographic evidence, and assessments were made by the investigator according to Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1. PD is defined as at least a 20% increase in the sum of the diameters of target lesions, taking as a reference, the smallest sum of diameters recorded since the treatment started (e.g., percent change from nadir, where nadir is defined as the smallest sum of diameters recorded since treatment start). In addition, the sum must have an absolute increase from nadir of 5 millimeters (mm). For participants who did not progress or die, PFS was censored at the date of last contact. Data are presented as median and 96% confidence interval.

Progression-free Survival (PFS) as Assessed by an Independent Radiologist: Randomized Phase
Time interval between the date of randomization and the earlier of the date of disease progression or the date of death due to any cause (up to 9.9 months)

PFS is defined as the interval of time between the date of randomization and the earlier of the date of disease progression or the date of death due to any cause. Disease progression was based on radiographic or photographic evidence, and assessments were made by an independent radiologist according to RECIST version 1.1. PD is defined as at least a 20% increase in the sum of the diameters of target lesions, taking as a reference, the smallest sum of diameters recorded since the treatment started (e.g., percent change from nadir, where nadir is defined as the smallest sum of diameters recorded since treatment start). In addition, the sum must have an absolute increase from nadir of 5 mm. For participants who did not progress or die, PFS was censored at the date of last contact.

Part 1: Safety and tolerability of GSK2118436 as assessed by changes in physical examination findings
Screening, Day 1 and Week 6.

Safety and tolerability parameter will include a complete (head, eyes, ears, nose, throat, skin, thyroid, neurological, lungs, cardiovascular, abdomen \[liver and spleen\], lymph nodes, extremities, height and weight) and brief (skin, lungs, cardiovascular system, abdomen \[liver and spleen\] and weight) physical examination at Baseline and at the end of Part 1 of the study.

Part 1: Safety and tolerability of GSK2118436 as assessed by changes in vital signs measurements
Screening, pre-dose and 8 hours post-dose on Study Day 1, 8, 15, and Week 6.

Safety and tolerability parameter will include measurement of vital signs (recording of systolic and diastolic blood pressure, temperature, and pulse rate) at Baseline and at the end of Part 1 of the study.

Part 1: Safety and tolerability of GSK2118436 as assessed by changes in ECG readings
Screening, Day 1, 8 Day 15 and Week 6. On study days 1 and 8, ECG will be obtained at 30 minutes pre-dose and 2-hours (hrs) post-dose administration.

Safety and tolerability parameter will include ECGs readings (heart rate and measurement of RR, PR, QRS, QT, and QTc intervals) at Baseline and at the end of Part 1 of the study.

Part 1: Safety and tolerability of GSK2118436 as assessed by changes in clinical laboratory assessments
Day 1, 8, 15 and and Week 6.

Safety and tolerability parameter will include laboratory values (hematology, clinical chemistry, coagulation, liver function tests, cardiac enzyme and beta-hCG/serum or urine pregnancy test for female subjects of childbearing potential only) at Baseline and at end of Part 1 of the study.

Part 2: Change from Baseline in QTcF interval at each time point for GSK2118436
Baseline (Study Day -1)/pre-dose (Study Days 1 and 8) (within 30 minutes prior to administration of study treatment) and 1, 1.5, 2, 3, 4, 6, 8, 10 and 24-hrs post-dose. Day 2 and 9, 24 hr post dose Holter ECG.

Change from Baseline in QTcF interval at each time point for GSK2118436 will be calculated as average of 3 Holter ECG replicates per time point minus the value at Baseline.

Number of participants with adverse events as a measure of safety and tolerability
First 28 days for Dose-limiting toxicity, Adverse Events for 1 year

Adverse Events will be graded by the investigator according to the NCI-CTCAE (version 4.0)

The percent of absolute bioavailability (F) of GSK2118436 following single-dose oral HPMC capsule and a concomitant IV microdose
Up to 72 hours
• Excretion of radioactivity in urine following oral administration of [14C]GSK2118436
Pre-dose, and post-dose for a minimum of 96 hours, and a maximum of 240 hours after dosing.
• Excretion of radioactivity in feces following oral administration of [14C]GSK2118436
Pre-dose, and post-dose for a minimum of 96 hours, and a maximum of 240 hours after dosing.
PK data, AEs, changes in laboratory values and vital signs, physical exam, clinical testing and PD data
21 days
Secondary Endpoints
Overall Survival
Time interval between the date of randomization and the date of death due to any cause (up to 22.1 months)
Number of Participants With a Best Overall Response of Confirmed Complete Response (CR) or Confirmed Partial Response (PR) as Assessed by the Investigator: Randomized Phase
From randomization until the first documented evidence of a confirmed complete response or partial response (median of 6.6 weeks)
Number of Participants With a Best Overall Response of Confirmed CR or PR as Assessed by an Independent Radiologist: Randomized Phase
From randomization until the first documented evidence of a confirmed complete response or partial response (median of 12.0 weeks)
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Study Design & Arms
AllocationRANDOMIZED
MaskingNONE
ModelCROSSOVER
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
GSK2118436EXPERIMENTALSubjects in this arm will receive GSK2118436 150 mg twice daily.
Dacarbazine (DTIC)ACTIVE_COMPARATORSubjects will receive intravenous dacarbazine (DTIC) 1000 mg/m2 every 3 weeks
CrossoverEXPERIMENTALSubjects who initially receive DTIC will be allowed to receive GSK2118436 after initial progression.
Part 1(Cohort 1): GSK2118436 225 mgEXPERIMENTALGSK2118436 (3 capsules of 75 mg) will be administered orally at the dose of 225 mg BID from Day 1 to 7 (and single dose on Day 8) under fasted conditions, either 1 hour before or 2 hours after a meal.
Part 1(Cohort 2): GSK2118436 300 mgEXPERIMENTALGSK2118436 (4 capsules of 75 mg) will be administered orally at the dose of 300 mg BID from Day 1 to 7 (and single dose on Day 8) under fasted conditions, either 1 hour before or 2 hours after a meal. If 225 mg BID is not tolerated in Part 1 /Cohort 1, then Part 1/Cohort 2 will not be initiated and 150 mg BID will be used in Part 2.
Part 2: GSK2118436 300 mg (or highest tolerated dose)EXPERIMENTALSubjects will receive a single dose of GSK2118436/placebo (4 capsules of 75 mg/highest tolerated dose) orally on the first 2 days of the study followed by 2 doses daily for 6 days and a single dose on the 9th day. There will be 1 day when a placebo will be given. All doses will be administered under fasted conditions, either 1 hour before or 2 hours after a meal.
Dose Escalation PartEXPERIMENTALDose escalation will be conducted to assess safety, tolerability, single and repeat dose PK profile and preliminary efficacy of GSK2118436 . The dose may be escalated to the overseas recommended phase III dose.
Study MedicationEXPERIMENTALGSK2118436
Part 1EXPERIMENTALPart 1 will identify the recommended Part 2 dose using a dose-escalation procedure. Escalation may proceed until either a maximum tolerated dose is established, or the toxicokinetic safety limit is reached. Subjects may dose up to three times a day.
Part 2EXPERIMENTALPart 2 will explore further the safety, tolerability, and clinical activity of GSK2118436 in subjects with BRAF mutation-positive tumors using the recommended part 2 dose identified during Part 1. Biologically active doses will be identified by measurement of pharmacodynamic markers in tumor tissue and blood across a range of doses and these doses may be explored in Part 2.
Interventions
NameTypeDescription
GSK2118436DRUG150 mg twice daily
Dacarbazine (DTIC)DRUGIntravenous (IV), 1000 mg/m2 every 3 weeks until initial progression
GSK2118436 75 mgDRUGEach capsule contains 75 mg of GSK2118436A as the mesylate salt, micronized particles as active equivalents.
PlaceboDRUGMatching placebo capsules will be administered in Part 2 of the study.
MidazolamDRUGMidazolam will be administered alone and with GSK2118436 in a sub-set of subjects in Part 2 to study the effect of GSK2118436 on CYP3A using midazolam as a probe.
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Eligibility Criteria
Age Range18 Years — N/A
SexALL
Healthy VolunteersNo
Study Sites94

Inclusion Criteria: * Adults at least 18 years of age * Has advanced (unresectable Stage III) or metastatic (Stage IV) melanoma that is BRAF mutation positive (V600E) * Is treatment naive for advanced (unresectable) or metastatic melanoma, with the exception of Interleukin 2 (IL-2) which is allowed...

Countries:United StatesAustraliaCanadaFranceGermanyHungaryIrelandItalyNetherlandsPolandRussiaSpainUnited KingdomJapan
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