Investigate Safety, Pharmacokinetics and Pharmacodynamics of GSK2118436 & GSK1120212

This study is ongoing, but not recruiting participants.
Sponsor:
Information provided by (Responsible Party):
GlaxoSmithKline
ClinicalTrials.gov Identifier:
NCT01072175
First received: February 12, 2010
Last updated: September 19, 2013
Last verified: September 2013
Results First Received: June 27, 2013  
Study Type: Interventional
Study Design: Allocation: Non-Randomized;   Endpoint Classification: Pharmacokinetics/Dynamics Study;   Intervention Model: Parallel Assignment;   Masking: Open Label;   Primary Purpose: Treatment
Condition: Cancer
Interventions: Drug: GSK2118436
Drug: GSK1120212

  Participant Flow
  Hide Participant Flow

Recruitment Details
Key information relevant to the recruitment process for the overall study, such as dates of the recruitment period and locations
No text entered.

Pre-Assignment Details
Significant events and approaches for the overall study following participant enrollment, but prior to group assignment
The study was comprised of Parts A, B, and D, which constitute the Phase I part of the study, and Part C, which constitutes the randomized Phase II part of the study. Participants did not enroll in all parts of the study sequentially. Each part of the study was comprised of a separate population of participants.

Reporting Groups
  Description
Part A: Dabrafenib 75 mg + Trametinib 2 mg Participants received a single dose of dabrafenib 75 mg gelatin capsules with repeat dose trametinib (Day 15).
Part B: Dabrafenib 75 mg + Trametinib 1 mg Melanoma BRAF-positive participants who did not receive prior treatment with BRAF inhibitors received dabrafenib 75 mg gelatin capsules BID and trametinib 1 mg tablets QD as continuous daily dosing. Dose escalation decisions were made based on all available pharmacokinetic (PK), safety, and other data from the first 4 evaluable participants, and additional participants were enrolled based on dose-limiting toxicities (DLTs) occurring during the first 3 weeks of treatment.
Part B: Dabrafenib 150 mg + Trametinib 1 mg Melanoma BRAF-positive participants who did not receive prior treatment with BRAF inhibitors and participants who had salivary ductal cancer received dabrafenib 150 mg gelatin capsules BID and trametinib 1 mg tablets QD as continuous daily dosing. Dose escalation decisions were made based on all available PK, safety, and other data from the first 4 evaluable participants and additional participants were enrolled based on DLTs occurring during the first 3 weeks of treatment.
Part B: Dabrafenib 150 mg + Trametinib 1.5 mg Melanoma BRAF-positive participants who did not receive prior treatment with BRAF inhibitors received dabrafenib 150 mg gelatin capsules BID and trametinib 1.5 mg tablets QD as continuous daily dosing. Dose escalation decisions were made based on all available PK, safety, and other data from the first 4 evaluable participants, and additional participants were enrolled based on DLTs occurring during the first 3 weeks of treatment.
Part B: Dabrafenib 150 mg + Trametinib 2 mg Melanoma BRAF-positive participants who received prior treatment with BRAF inhibitors and participants who had colorectal cancer and BRAFi naïve melanoma received dabrafenib 150 mg gelatin capsules BID and trametinib 2 mg tablets QD as continuous daily dosing. Dose escalation did not proceed beyond these doses of dabrafenib and trametinib.
Part C (Randomized): Dabrafenib 150 mg Participants received dabrafenib 150 mg gelatin capsules BID.
Part C (Randomized): Dabrafenib 150 mg + Trametinib 1 mg Participants received dabrafenib 150 mg gelatin capsules BID and trametinib 1 mg tablets QD.
Part C (Randomized): Dabrafenib 150 mg + Trametinib 2 mg Participants received dabrafenib 150 mg gelatin capsules BID and trametinib 2 mg tablets QD.
Part C (Crossover): Dabrafenib 150 mg + Trametinib 2 mg Participants who received dabrafenib 150 mg capsules BID alone in the Randomized Phase were given the opportunity to receive combination dosing of dabrafenib 150 mg gelatin capsules BID and trametinib 2 mg tablets QD upon disease progression with approval of the GlaxoSmithKline (GSK) Medical Monitor.
Part D: Dabrafenib (DAB) 75 mg to DAB 75 mg + Trametinib 2 mg Participants received dabrefinib 75 mg HPMC capsules BID. These participants, after completion of serial PK collection in the first treatment period, were allowed to continue with dabrafenib 75 mg BID and trametinib 2 mg tablets QD as combination dosing starting on Day 29.
Part D: Dabrafenib 150 mg to DAB 150 mg + Trametinib 2 mg Participants received dabrefinib 150 mg HPMC capsules BID. These participants, after completion of serial PK collection in the first treatment period, were allowed to continue with dabrafenib 150 mg BID and trametinib 2 mg tablets QD as combination dosing starting on Day 29.
Part D: Dabrafenib 75 mg + Trametinib 2 mg Participants received dabrefinib 75 mg HPMC capsules BID and trametinib 2 mg tablets QD.
Part D: Dabrafenib 150 mg + Trametinib 2 mg Participants received dabrefinib 150 mg HPMC capsules BID and trametinib 2 mg tablets QD.

Participant Flow for 5 periods

Period 1:   Part A (Drug-Drug Interaction)
    Part A: Dabrafenib 75 mg + Trametinib 2 mg     Part B: Dabrafenib 75 mg + Trametinib 1 mg     Part B: Dabrafenib 150 mg + Trametinib 1 mg     Part B: Dabrafenib 150 mg + Trametinib 1.5 mg     Part B: Dabrafenib 150 mg + Trametinib 2 mg     Part C (Randomized): Dabrafenib 150 mg     Part C (Randomized): Dabrafenib 150 mg + Trametinib 1 mg     Part C (Randomized): Dabrafenib 150 mg + Trametinib 2 mg     Part C (Crossover): Dabrafenib 150 mg + Trametinib 2 mg     Part D: Dabrafenib (DAB) 75 mg to DAB 75 mg + Trametinib 2 mg     Part D: Dabrafenib 150 mg to DAB 150 mg + Trametinib 2 mg     Part D: Dabrafenib 75 mg + Trametinib 2 mg     Part D: Dabrafenib 150 mg + Trametinib 2 mg  
STARTED     8     0     0     0     0     0     0     0     0     0     0     0     0  
COMPLETED     0     0     0     0     0     0     0     0     0     0     0     0     0  
NOT COMPLETED     8     0     0     0     0     0     0     0     0     0     0     0     0  
Physician Decision                 6                 0                 0                 0                 0                 0                 0                 0                 0                 0                 0                 0                 0  
Withdrawal by Subject                 1                 0                 0                 0                 0                 0                 0                 0                 0                 0                 0                 0                 0  
Death                 1                 0                 0                 0                 0                 0                 0                 0                 0                 0                 0                 0                 0  

Period 2:   Part B (Dose Escalation and Expansion)
    Part A: Dabrafenib 75 mg + Trametinib 2 mg     Part B: Dabrafenib 75 mg + Trametinib 1 mg     Part B: Dabrafenib 150 mg + Trametinib 1 mg     Part B: Dabrafenib 150 mg + Trametinib 1.5 mg     Part B: Dabrafenib 150 mg + Trametinib 2 mg     Part C (Randomized): Dabrafenib 150 mg     Part C (Randomized): Dabrafenib 150 mg + Trametinib 1 mg     Part C (Randomized): Dabrafenib 150 mg + Trametinib 2 mg     Part C (Crossover): Dabrafenib 150 mg + Trametinib 2 mg     Part D: Dabrafenib (DAB) 75 mg to DAB 75 mg + Trametinib 2 mg     Part D: Dabrafenib 150 mg to DAB 150 mg + Trametinib 2 mg     Part D: Dabrafenib 75 mg + Trametinib 2 mg     Part D: Dabrafenib 150 mg + Trametinib 2 mg  
STARTED     0     6     23     27     79     0     0     0     0     0     0     0     0  
Ongoing     0     2     10     9     28     0     0     0     0     0     0     0     0  
COMPLETED     0     0     0     0     0     0     0     0     0     0     0     0     0  
NOT COMPLETED     0     6     23     27     79     0     0     0     0     0     0     0     0  
Physician Decision                 0                 1                 3                 4                 13                 0                 0                 0                 0                 0                 0                 0                 0  
Withdrawal by Subject                 0                 0                 0                 2                 2                 0                 0                 0                 0                 0                 0                 0                 0  
Death                 0                 3                 10                 12                 36                 0                 0                 0                 0                 0                 0                 0                 0  
Ongoing                 0                 2                 10                 9                 28                 0                 0                 0                 0                 0                 0                 0                 0  

Period 3:   Part C (Phase II: Randomized Phase)
    Part A: Dabrafenib 75 mg + Trametinib 2 mg     Part B: Dabrafenib 75 mg + Trametinib 1 mg     Part B: Dabrafenib 150 mg + Trametinib 1 mg     Part B: Dabrafenib 150 mg + Trametinib 1.5 mg     Part B: Dabrafenib 150 mg + Trametinib 2 mg     Part C (Randomized): Dabrafenib 150 mg     Part C (Randomized): Dabrafenib 150 mg + Trametinib 1 mg     Part C (Randomized): Dabrafenib 150 mg + Trametinib 2 mg     Part C (Crossover): Dabrafenib 150 mg + Trametinib 2 mg     Part D: Dabrafenib (DAB) 75 mg to DAB 75 mg + Trametinib 2 mg     Part D: Dabrafenib 150 mg to DAB 150 mg + Trametinib 2 mg     Part D: Dabrafenib 75 mg + Trametinib 2 mg     Part D: Dabrafenib 150 mg + Trametinib 2 mg  
STARTED     0     0     0     0     0     54     54     54     0     0     0     0     0  
Ongoing     0     0     0     0     0     35     32     40     0     0     0     0     0  
COMPLETED     0     0     0     0     0     0     0     0     0     0     0     0     0  
NOT COMPLETED     0     0     0     0     0     54     54     54     0     0     0     0     0  
Withdrawal by Subject                 0                 0                 0                 0                 0                 0                 4                 0                 0                 0                 0                 0                 0  
Death                 0                 0                 0                 0                 0                 19                 18                 14                 0                 0                 0                 0                 0  
Ongoing                 0                 0                 0                 0                 0                 35                 32                 40                 0                 0                 0                 0                 0  

Period 4:   Part C (Phase II: Crossover Phase [CP])
    Part A: Dabrafenib 75 mg + Trametinib 2 mg     Part B: Dabrafenib 75 mg + Trametinib 1 mg     Part B: Dabrafenib 150 mg + Trametinib 1 mg     Part B: Dabrafenib 150 mg + Trametinib 1.5 mg     Part B: Dabrafenib 150 mg + Trametinib 2 mg     Part C (Randomized): Dabrafenib 150 mg     Part C (Randomized): Dabrafenib 150 mg + Trametinib 1 mg     Part C (Randomized): Dabrafenib 150 mg + Trametinib 2 mg     Part C (Crossover): Dabrafenib 150 mg + Trametinib 2 mg     Part D: Dabrafenib (DAB) 75 mg to DAB 75 mg + Trametinib 2 mg     Part D: Dabrafenib 150 mg to DAB 150 mg + Trametinib 2 mg     Part D: Dabrafenib 75 mg + Trametinib 2 mg     Part D: Dabrafenib 150 mg + Trametinib 2 mg  
STARTED     0     0     0     0     0     0     0     0     43     0     0     0     0  
Ongoing     0     0     0     0     0     0     0     0     28     0     0     0     0  
COMPLETED     0     0     0     0     0     0     0     0     0     0     0     0     0  
NOT COMPLETED     0     0     0     0     0     0     0     0     43     0     0     0     0  
Death                 0                 0                 0                 0                 0                 0                 0                 0                 15                 0                 0                 0                 0  
Ongoing                 0                 0                 0                 0                 0                 0                 0                 0                 28                 0                 0                 0                 0  

Period 5:   Part D (HPMC Capsules)
    Part A: Dabrafenib 75 mg + Trametinib 2 mg     Part B: Dabrafenib 75 mg + Trametinib 1 mg     Part B: Dabrafenib 150 mg + Trametinib 1 mg     Part B: Dabrafenib 150 mg + Trametinib 1.5 mg     Part B: Dabrafenib 150 mg + Trametinib 2 mg     Part C (Randomized): Dabrafenib 150 mg     Part C (Randomized): Dabrafenib 150 mg + Trametinib 1 mg     Part C (Randomized): Dabrafenib 150 mg + Trametinib 2 mg     Part C (Crossover): Dabrafenib 150 mg + Trametinib 2 mg     Part D: Dabrafenib (DAB) 75 mg to DAB 75 mg + Trametinib 2 mg     Part D: Dabrafenib 150 mg to DAB 150 mg + Trametinib 2 mg     Part D: Dabrafenib 75 mg + Trametinib 2 mg     Part D: Dabrafenib 150 mg + Trametinib 2 mg  
STARTED     0     0     0     0     0     0     0     0     0     12     16     43     39  
Ongoing     0     0     0     0     0     0     0     0     0     10     12     34     34  
COMPLETED     0     0     0     0     0     0     0     0     0     0     0     0     0  
NOT COMPLETED     0     0     0     0     0     0     0     0     0     12     16     43     39  
Lost to Follow-up                 0                 0                 0                 0                 0                 0                 0                 0                 0                 0                 0                 2                 0  
Withdrawal by Subject                 0                 0                 0                 0                 0                 0                 0                 0                 0                 0                 0                 1                 0  
Death                 0                 0                 0                 0                 0                 0                 0                 0                 0                 2                 4                 6                 5  
Ongoing                 0                 0                 0                 0                 0                 0                 0                 0                 0                 10                 12                 34                 34  



  Baseline Characteristics
  Hide Baseline Characteristics

Population Description
Explanation of how the number of participants for analysis was determined. Includes whether analysis was per protocol, intention to treat, or another method. Also provides relevant details such as imputation technique, as appropriate.
No text entered.

Reporting Groups
  Description
Part A: Dabrafenib 75 mg + Trametinib 2 mg Participants received a single dose of dabrafenib 75 mg gelatin capsules with repeat dose trametinib (Day 15).
Part B: Dabrafenib 75 mg + Trametinib 1 mg Melanoma BRAF-positive participants who did not receive prior treatment with BRAF inhibitors received dabrafenib 75 mg gelatin capsules BID and trametinib 1 mg tablets QD as continuous daily dosing. Dose escalation decisions were made based on all available pharmacokinetic (PK), safety, and other data from the first 4 evaluable participants, and additional participants were enrolled based on dose-limiting toxicities (DLTs) occurring during the first 3 weeks of treatment.
Part B: Dabrafenib 150 mg + Trametinib 1 mg Melanoma BRAF-positive participants who did not receive prior treatment with BRAF inhibitors and participants who had salivary ductal cancer received dabrafenib 150 mg gelatin capsules BID and trametinib 1 mg tablets QD as continuous daily dosing. Dose escalation decisions were made based on all available PK, safety, and other data from the first 4 evaluable participants and additional participants were enrolled based on DLTs occurring during the first 3 weeks of treatment.
Part B: Dabrafenib 150 mg + Trametinib 1.5 mg Melanoma BRAF-positive participants who did not receive prior treatment with BRAF inhibitors received dabrafenib 150 mg gelatin capsules BID and trametinib 1.5 mg tablets QD as continuous daily dosing. Dose escalation decisions were made based on all available PK, safety, and other data from the first 4 evaluable participants, and additional participants were enrolled based on DLTs occurring during the first 3 weeks of treatment.
Part B: Dabrafenib 150 mg + Trametinib 2 mg Melanoma BRAF-positive participants who received prior treatment with BRAF inhibitors and participants who had colorectal cancer and BRAFi naïve melanoma received dabrafenib 150 mg gelatin capsules BID and trametinib 2 mg tablets QD as continuous daily dosing. Dose escalation did not proceed beyond these doses of dabrafenib and trametinib.
Part C: Dabrafenib 150 mg Participants received dabrafenib 150 mg gelatin capsules BID.
Part C: Dabrafenib 150 mg + Trametinib 1 mg Participants received dabrafenib 150 mg gelatin capsules BID and trametinib 1 mg tablets QD.
Part C: Dabrafenib 150 mg + Trametinib 2 mg Participants received dabrafenib 150 mg gelatin capsules BID and trametinib 2 mg tablets QD.
Part D: Dabrafenib (DAB) 75 mg to DAB 75 mg + Trametinib 2 mg Participants received dabrefinib 75 mg HPMC capsules BID. These participants, after completion of serial PK collection in the first treatment period, were allowed to continue with dabrafenib 75 mg BID and trametinib 2 mg tablets QD as combination dosing starting on Day 29.
Part D: Dabrafenib 150 mg to DAB 150 mg + Trametinib 2 mg Participants received dabrefinib 150 mg HPMC capsules BID. These participants, after completion of serial PK collection in the first treatment period, were allowed to continue with dabrafenib 150 mg BID and trametinib 2 mg tablets QD as combination dosing starting on Day 29.
Part D: Dabrafenib 75 mg + Trametinib 2 mg Participants received dabrefinib 75 mg HPMC capsules BID and trametinib 2 mg tablets QD.
Part D: Dabrafenib 150 mg + Trametinib 2 mg Participants received dabrefinib 150 mg HPMC capsules BID and trametinib 2 mg tablets QD.
Total Total of all reporting groups

Baseline Measures
    Part A: Dabrafenib 75 mg + Trametinib 2 mg     Part B: Dabrafenib 75 mg + Trametinib 1 mg     Part B: Dabrafenib 150 mg + Trametinib 1 mg     Part B: Dabrafenib 150 mg + Trametinib 1.5 mg     Part B: Dabrafenib 150 mg + Trametinib 2 mg     Part C: Dabrafenib 150 mg     Part C: Dabrafenib 150 mg + Trametinib 1 mg     Part C: Dabrafenib 150 mg + Trametinib 2 mg     Part D: Dabrafenib (DAB) 75 mg to DAB 75 mg + Trametinib 2 mg     Part D: Dabrafenib 150 mg to DAB 150 mg + Trametinib 2 mg     Part D: Dabrafenib 75 mg + Trametinib 2 mg     Part D: Dabrafenib 150 mg + Trametinib 2 mg     Total  
Number of Participants  
[units: participants]
  8     6     23     27     79     54     54     54     12     16     43     39     415  
Age  
[units: Years]
Mean ± Standard Deviation
  52.8  ± 16.04     48.2  ± 7.28     54.2  ± 13.24     52.2  ± 12.09     51.5  ± 12.82     51.8  ± 15.19     49.9  ± 14.70     55.9  ± 11.85     51.8  ± 12.39     53.1  ± 17.04     52.8  ± 14.57     56.7  ± 14.08     52.8  ± 13.74  
Gender  
[units: Participants]
                         
Female     2     2     10     12     44     25     24     20     6     8     18     14     185  
Male     6     4     13     15     35     29     30     34     6     8     25     25     230  
Race/Ethnicity, Customized  
[units: Participants]
                         
White     7     6     22     26     77     52     54     53     12     16     43     39     407  
Asian & White     1     0     0     0     0     0     0     0     0     0     0     0     1  
African American     0     0     0     1     0     0     0     0     0     0     0     0     1  
Asian     0     0     0     0     2     0     0     1     0     0     0     0     3  
Missing     0     0     1     0     0     2     0     0     0     0     0     0     3  



  Outcome Measures
  Show All Outcome Measures

1.  Primary:   Maximum Plasma Concentration (Cmax) of a Single Dose of Dabrafenib Administered Alone and in Combination With Trametnib in Part A   [ Time Frame: Day 15 ]

2.  Primary:   AUC (0-t) and AUC (0-inf) of Dabrafenib and Its Metabolites in Part A   [ Time Frame: Day 15 ]

3.  Primary:   Number of Participants With Any Adverse Event (AE) or Serious Adverse Event (SAE) in Part B   [ Time Frame: From Baseline (Day 1) until Follow-up visit (up to approximately 103 weeks ) ]

4.  Primary:   Number of Participants With the Indicated Worst-case Grade (G) Change From Baseline in the Indicated Clinical Chemistry Parameters in Part B   [ Time Frame: From Baseline (Day 1) until Follow-up visit (up to approximately 103 weeks) ]

5.  Primary:   Number of Participants With the Indicated Worst-case Grade Change From Baseline in the Indicated Hematology Parameters in Part B   [ Time Frame: From Baseline (Day 1) until Follow-up visit (up to approximately 103 weeks) ]

6.  Primary:   Number of Participants With the Indicated Worst-case Change From Baseline in Heart Rate and Blood Pressure in Part B   [ Time Frame: From Baseline (Day 1) until Follow-up visit (up to approximately 103 weeks) ]

7.  Primary:   Number of Participants With BRAF Mutant Metastatic Melanoma With Best Overall Response as Assessed by the Investigator in Part C (Randomized)   [ Time Frame: From the first dose of study medication to the first documented evidence of a confirmed complete response or partial response (up to approximately 47 weeks) ]

8.  Primary:   Number of Participants With BRAF Mutant Metastatic Melanoma With Best Overall Response Assessed by Blinded Independent Central Review (BICR) in Part C (Randomized)   [ Time Frame: From the first dose of study medication to the first documented evidence of a confirmed complete response or partial response (up to approximately 36 weeks) ]

9.  Primary:   Number of Participants With BRAF Mutant Metastatic Melanoma With Best Overall Response as Assessed by the Investigator in Part C (Crossover)   [ Time Frame: From the first dose of study medication to the first documented evidence of a confirmed complete response or partial response (up to approximately 15 weeks) ]

10.  Primary:   Duration of Response as Assessed by the Investigator and Blinded Independent Central Review (BICR) in Part C (Randomized)   [ Time Frame: First documented evidence of PR or CR until the date of the first documented sign of disease progression or the date of death due to any cause (up to approximately 17 months) ]

11.  Primary:   Progression-free Survival (PFS) as Assessed by the Investigator in Part C (Randomized)   [ Time Frame: From the first dose of study medication to the earliest date of disease progression (PD) or death due to any cause (up to approximately 17 months) ]

12.  Primary:   Progression-free Survival (PFS) as Assessed by the Blinded Independent Central Review (BICR) in Part C (Randomized)   [ Time Frame: From the first dose of study medication to the earliest date of disease progression (PD) or death due to any cause (up to approximately 17 months) ]

13.  Primary:   Progression-free Survival (PFS) as Assessed by the Investigator in Part C (Crossover)   [ Time Frame: From the first dose of study medication to the earliest date of disease progression (PD) or death due to any cause (up to approximately 9 months) ]

14.  Primary:   Number of Participants With Any Adverse Event (AE) or Serious Adverse Event (SAE) in Part C (Randomized)   [ Time Frame: From Baseline (Day 1) until Follow-up visit (up to approximatley 75 weeks) ]

15.  Primary:   Number of Participants With the Indicated Worst-case Grade (G) Change From Baseline in the Indicated Clinical Chemistry Parameters in Part C (Randomized)   [ Time Frame: From Baseline (Day 1) until Follow-up visit (up to approximately 75 weeks) ]

16.  Primary:   Number of Participants With the Indicated Worst-case Grade Change From Baseline in the Indicated Hematology Parameters in Part C (Randomized)   [ Time Frame: From Baseline (Day 1) until Follow-up visit (up to approximately 75 weeks) ]

17.  Primary:   Number of Participants With the Indicated Worst-case Change From Baseline in Heart Rate and Blood Pressure in Part C (Randomized)   [ Time Frame: From Baseline (Day 1) until Follow-up visit (up to approximlately 75 weeks) ]

18.  Primary:   Maximum Plasma Concentration (Cmax) of a Single and Repeat Dose of Dabrafenib Alone and in Combination With Trametinib in Part D (Analyte=GSK2118436)   [ Time Frame: Day 1 and Day 21 ]

19.  Primary:   The Tmax of a Single and Repeat Dose of Dabrafenib Alone and in Combination With Trametinib in Part D (Analyte=GSK2118436)   [ Time Frame: Day 1 and Day 21 ]

20.  Primary:   AUC (0-tau) and AUC (0-inf) of Single and Repeat Doses of Dabrafenib Alone and in Combination With Trametinib in Part D (Analyte=GSK2118436)   [ Time Frame: Day 1 and Day 21 ]

21.  Primary:   Number of Participants With Any Adverse Event (AE) or Serious Adverse Event (SAE) in Part D   [ Time Frame: From Baseline (Day 1) until Follow-up visit (up to approximately 61 weeks) ]

22.  Primary:   Number of Participants With the Indicated Worst-case Grade (G) Change From Baseline in the Indicated Clinical Chemistry Parameters in Part D   [ Time Frame: From Baseline (Day 1) until Follow-up visit (up to approximately 61 weeks) ]

23.  Primary:   Number of Participants With the Indicated Worst-case Grade Change From Baseline in the Indicated Hematology Parameters in Part D   [ Time Frame: From Baseline (Day 1) until Follow-up visit (up to approximately 61 weeks) ]

24.  Primary:   Number of Participants With the Indicated Worst-case Change From Baseline in Heart Rate and Blood Pressure in Part D   [ Time Frame: From Baseline (Day 1) until Follow-up visit (up to approximately 61 weeks) ]

25.  Secondary:   Steady State Concentration of Trametinib With Concomitant Administration of Dabrafenib in Part A   [ Time Frame: Day 15 and Day 16 ]

26.  Secondary:   The AUC [0-tau] of Dabrafenib (DAB) and Its Metabolite in Combination With Trametinib (T) in Part B   [ Time Frame: Day 15 and Day 21 ]

27.  Secondary:   Pre-dose (Trough) Concentration at the End of the Dosing Interval (Ctau) and Maximum Plasma Concentration (Cmax) of Dabrafenib and Its Metabolite in Combination With Trametinib in Part B   [ Time Frame: Day 15 and Day 21 ]
  Hide Outcome Measure 27

Measure Type Secondary
Measure Title Pre-dose (Trough) Concentration at the End of the Dosing Interval (Ctau) and Maximum Plasma Concentration (Cmax) of Dabrafenib and Its Metabolite in Combination With Trametinib in Part B
Measure Description Pre-dose (trough) concentration at the end of the dosing interval (Ctau) and maximum plasma concentration (Cmax) were assessed for plasma dabrafenib (DAB) following repeat dosing of DAB administered in combination with trametinib (T). The trough concentration is defined as the plasma level of a pharmaceutical product measured just before the next dose. Blood samples for PK analysis of the metabolites hydroxy-dabrafenib (GSK2285403), carboxy-dabrafenib (GSK2298683) and desmethyl-dabrafenib (GSK2167542) of dabrafenib were obtained at Day 15 pre-dose and Day 21 pre-dose and at 1, 2, 4, 6, and 8 hours post-dose administration.
Time Frame Day 15 and Day 21  
Safety Issue No  

Population Description
Explanation of how the number of participants for analysis was determined. Includes whether analysis was per protocol, intention to treat, or another method. Also provides relevant details such as imputation technique, as appropriate.
PK Population. Only those participants who were available at the indicated time points were analyzed.

Reporting Groups
  Description
Part B: Dabrafenib 75 mg + Trametinib 1 mg Melanoma BRAF-positive participants who did not receive prior treatment with BRAF inhibitors received dabrafenib 75 mg gelatin capsules BID and trametinib 1 mg tablets QD as continuous daily dosing. Dose escalation decisions were made based on all available pharmacokinetic (PK), safety, and other data from the first 4 evaluable participants, and additional participants were enrolled based on dose-limiting toxicities (DLTs) occurring during the first 3 weeks of treatment.
Part B: Dabrafenib 150 mg + Trametinib 1 mg Melanoma BRAF-positive participants who did not receive prior treatment with BRAF inhibitors and participants who had salivary ductal cancer received dabrafenib 150 mg gelatin capsules BID and trametinib 1 mg tablets QD as continuous daily dosing. Dose escalation decisions were made based on all available PK, safety, and other data from the first 4 evaluable participants and additional participants were enrolled based on DLTs occurring during the first 3 weeks of treatment.
Part B: Dabrafenib 150 mg + Trametinib 1.5 mg Melanoma BRAF-positive participants who did not receive prior treatment with BRAF inhibitors received dabrafenib 150 mg gelatin capsules BID and trametinib 1.5 mg tablets QD as continuous daily dosing. Dose escalation decisions were made based on all available PK, safety, and other data from the first 4 evaluable participants, and additional participants were enrolled based on DLTs occurring during the first 3 weeks of treatment.
Part B: Dabrafenib 150 mg + Trametinib 2 mg Melanoma BRAF-positive participants who received prior treatment with BRAF inhibitors and participants who had colorectal cancer and BRAFi naïve melanoma received dabrafenib 150 mg gelatin capsules BID and trametinib 2 mg tablets QD as continuous daily dosing. Dose escalation did not proceed beyond these doses of dabrafenib and trametinib.

Measured Values
    Part B: Dabrafenib 75 mg + Trametinib 1 mg     Part B: Dabrafenib 150 mg + Trametinib 1 mg     Part B: Dabrafenib 150 mg + Trametinib 1.5 mg     Part B: Dabrafenib 150 mg + Trametinib 2 mg  
Number of Participants Analyzed  
[units: participants]
  6     8     12     8  
Pre-dose (Trough) Concentration at the End of the Dosing Interval (Ctau) and Maximum Plasma Concentration (Cmax) of Dabrafenib and Its Metabolite in Combination With Trametinib in Part B  
[units: ng/mL]
Geometric Mean ( 95% Confidence Interval )
       
DAB Ctau, Day 15, n=6, 4, 5, 4     59.8  
  ( 19.1 to 187 )  
  44.6  
  ( 17.1 to 117 )  
  115  
  ( 27.8 to 472 )  
  73.7  
  ( 10.3 to 528 )  
DAB Ctau, Day 21, n=0, 8, 12, 8     NA  
  ( NA to NA ) [1]
  185  
  ( 79.7 to 428 )  
  102  
  ( 57.1 to 184 )  
  79.9  
  ( 32.2 to 198 )  
DAB Cmax, Day 15, n=6, 4, 5, 4     640  
  ( 390 to 1048 )  
  906  
  ( 221 to 3717 )  
  1306  
  ( 700 to 2437 )  
  1046  
  ( 545 to 2011 )  
DAB Cmax, Day 21, n=0, 8, 12, 8     NA  
  ( NA to NA ) [1]
  1263  
  ( 863 to 1848 )  
  1346  
  ( 997 to 1817 )  
  1391  
  ( 1002 to 1932 )  
GSK2285403 Ctau, Day 15, n=6, 4, 5, 4     72.9  
  ( 25.2 to 211 )  
  47.8  
  ( 20.2 to 113 )  
  97.9  
  ( 32.2 to 297 )  
  74.4  
  ( 15.7 to 353 )  
GSK2285403 Ctau, Day 21, n=0, 8, 12, 8     NA  
  ( NA to NA ) [1]
  136  
  ( 62.4 to 299 )  
  92.9  
  ( 60.2 to 143 )  
  82.7  
  ( 37.6 to 182 )  
GSK2285403 Cmax, Day 15, n=6, 4, 5, 4     399  
  ( 265 to 601 )  
  418  
  ( 146 to 1201 )  
  597  
  ( 300 to 1186 )  
  630  
  ( 411 to 964 )  
GSK2285403 Cmax, Day 21, n=0, 8, 12, 8     NA  
  ( NA to NA ) [1]
  775  
  ( 441 to 1364 )  
  668  
  ( 507 to 882 )  
  722  
  ( 502 to 1039 )  
GSK2298683 Ctau, Day 15, n=6, 4, 5, 4     2345  
  ( 1237 to 4447 )  
  2360  
  ( 1134 to 4911 )  
  2792  
  ( 2069 to 3768 )  
  4372  
  ( 2589 to 7384 )  
GSK2298683 Ctau, Day 21, n=0, 8, 12, 8     NA  
  ( NA to NA ) [1]
  2920  
  ( 1674 to 5095 )  
  3221  
  ( 2619 to 3962 )  
  3740  
  ( 2564 to 5455 )  
GSK2298683 Cmax, Day 15, n=6, 4, 5, 4     3757  
  ( 2385 to 5916 )  
  4545  
  ( 3817 to 5411 )  
  4636  
  ( 3258 to 6598 )  
  7098  
  ( 4914 to 10254 )  
GSK2298683 Cmax, Day 21, n=0, 8, 12, 8     NA  
  ( NA to NA ) [1]
  5301  
  ( 3392 to 8286 )  
  5416  
  ( 4163 to 7048 )  
  6257  
  ( 4937 to 7931 )  
GSK2167542 Ctau, Day 15, n=6, 4, 5, 4     257  
  ( 140 to 473 )  
  249  
  ( 79.4 to 782 )  
  331  
  ( 185 to 590 )  
  318  
  ( 260 to 389 )  
GSK2167542 Ctau, Day 21, n=0, 8, 12, 8     NA  
  ( NA to NA ) [1]
  196  
  ( 90.8 to 425 )  
  248  
  ( 140 to 439 )  
  369  
  ( 191 to 714 )  
GSK2167542 Cmax, Day 15, n=6, 4, 5, 4     300  
  ( 157 to 572 )  
  355  
  ( 114 to 1108 )  
  523  
  ( 251 to 1091 )  
  460  
  ( 190 to 1113 )  
GSK2167542 Cmax, Day 21, n=0, 8, 12, 8     NA  
  ( NA to NA ) [1]
  543  
  ( 298 to 989 )  
  373  
  ( 248 to 562 )  
  430  
  ( 226 to 818 )  
[1] No participants were analyzed in this treatment arm at this time point.

No statistical analysis provided for Pre-dose (Trough) Concentration at the End of the Dosing Interval (Ctau) and Maximum Plasma Concentration (Cmax) of Dabrafenib and Its Metabolite in Combination With Trametinib in Part B



28.  Secondary:   The Tmax of Dabrafenib and Its Metabolite in Combination With Trametinib in Part B   [ Time Frame: Day 15 and Day 21 ]

29.  Secondary:   The AUC (0-tau) Assessment of Trametinib in Combination With Dabrafenib in Part B (Analyte=GSK1120212)   [ Time Frame: Day 15 and Day 21 ]

30.  Secondary:   The Ctau and Cmax Assessments of Trametinib in Combination With Dabrafenib in Part B (Analyte=GSK1120212)   [ Time Frame: Day 15 and Day 21 ]

31.  Secondary:   The Tmax Assessment of Trametinib in Combination With Dabrafenib in Part B (Analyte=GSK1120212)   [ Time Frame: Day 15 and Day 21 ]

32.  Secondary:   Number of Participants With BRAFi-naïve Mutant Metastatic Melanoma With the Best Overall Response as Assessed by Investigator in Part B   [ Time Frame: From the first dose of study medication to the first documented evidence of a confirmed complete response or partial response (up to 103 weeks) ]

33.  Secondary:   Duration of Response as Assessed by the Investigator in Participants With BRAFi-naïve Mutant Metastatic Melanoma in Part B   [ Time Frame: First documented evidence of PR or CR until the earlier of date of disease progression or date of death due to any cause (up to approximately 22 months) ]

34.  Secondary:   Progression-free Survival (PFS) as Assessed by the Investigator in Participants With BRAFi-naïve Mutant Metastatic Melanoma in Part B   [ Time Frame: From the date of first dose to the earliest date of disease progression (PD) or death due to any cause (up to approximately 22 months) ]

35.  Secondary:   Overall Survival (OS) in Part B BRAFi Naïve Melanoma Participants   [ Time Frame: From the date of first dose until date of death due to any cause (up to approximately 22 months) ]

36.  Secondary:   Overall Survival (OS) in Part C   [ Time Frame: From the date of randomization until date of death due to any cause (up to approximately 17 months) ]

37.  Secondary:   Plasma Concentrations of Dabrafenib and Its Metabolites in Part C   [ Time Frame: Day 15, Week 8, Week 16, Week 24, Week 32, Week 40, Week 48, and Week 56 ]

38.  Secondary:   Plasma Concentrations of Trametinib in Part C   [ Time Frame: Day 15, Week 8, Week 16, Week 24, Week 32, Week 40, Week 48, and Week 56 ]

39.  Secondary:   Oral Clearance (CL/F) of Dabrafenib and Trametinib   [ Time Frame: Day 15, Week 8, Week 16, Week 24, Week 32, Week 40, and Week 48 ]

40.  Secondary:   Oral Volume of Distribution (V/F) of Dabrafenib and Trametinib   [ Time Frame: Day 15, Week 8, Week 16, Week 24, Week 32, Week 40, and Week 48 ]

41.  Secondary:   Cmax of Dabrafenib Metabolites in Part D   [ Time Frame: Day 1: pre-dose, and 0.5, 1, 1.5, 2, 3, 4, 6, 8, 10, and 24 hours post dose. Day 21: pre-dose and 0.5, 1, 1.5, 2, 3, 4, 6, 8, and 10 hours post-dose ]

42.  Secondary:   The Tmax of Dabrafenib Metabolites in Part D   [ Time Frame: Day 1: pre-dose, and 0.5, 1, 1.5, 2, 3, 4, 6, 8, 10, and 24 hours post dose. Day 21: pre-dose and 0.5, 1, 1.5, 2, 3, 4, 6, 8, and 10 hours post-dose ]

43.  Secondary:   Area Under the Concentration-time Curve (AUC) of Dabrafenib Metabolites in Part D   [ Time Frame: Day 1: pre-dose, and 0.5, 1, 1.5, 2, 3, 4, 6, 8, 10, and 24 hours post dose. Day 21: pre-dose and 0.5, 1, 1.5, 2, 3, 4, 6, 8, and 10 hours post-dose ]

44.  Secondary:   The Cmax Assessment of Trametinib in Part D   [ Time Frame: Day 1: pre-dose, and 0.5, 1, 1.5, 2, 3, 4, 6, 8, 10, and 24 hours post dose. Day 21: pre-dose and 0.5, 1, 1.5, 2, 3, 4, 6, 8, and 10 hours post-dose ]

45.  Secondary:   The Tmax Assessment of Trametinib in Part D   [ Time Frame: Day 1: pre-dose, and 0.5, 1, 1.5, 2, 3, 4, 6, 8, 10, and 24 hours post dose. Day 21: pre-dose and 0.5, 1, 1.5, 2, 3, 4, 6, 8, and 10 hours post-dose ]

46.  Secondary:   Area Under the Concentration-time Curve Assessment of Trametinib in Part D   [ Time Frame: Day 1: pre-dose, and 0.5, 1, 1.5, 2, 3, 4, 6, 8, 10, and 24 hours post dose. Day 21: pre-dose and 0.5, 1, 1.5, 2, 3, 4, 6, 8, and 10 hours post-dose ]

47.  Secondary:   Number of Participants With the Best Overall Response as Assessed by the Investigator in Participants in Part D   [ Time Frame: From the date of first dose of study medication to the first documented evidence of a confirmed complete response or partial response (up to approximately 280 days ) ]

48.  Secondary:   Duration of Response as Assessed by the Investigator in Part D   [ Time Frame: First documented evidence of PR or CR until the earlier of date of disease progression or date of death due to any cause (up to approximately 13 months) ]

49.  Secondary:   Progression-free Survival (PFS) as Assessed by the Investigator in Part D   [ Time Frame: From the date of randomization to the earliest date of disease progression (PD) or death due to any cause (up to approximately 13 months) ]

50.  Secondary:   Change From Baseline in p-ERK and Other Biomarkers in Tumor Biopsies in Participants With BRAF Mutant Colorectal Cancer in Part B   [ Time Frame: Screening and at disease progression (up to approximately 8 months) ]
Results not yet reported.   Anticipated Reporting Date:   06/2014   Safety Issue:   No

51.  Secondary:   Overall Survival in Part D   [ Time Frame: From the date of first dose until date of death due to any cause (up to approximately 14 months) ]
Results not yet reported.   Anticipated Reporting Date:   10/2014   Safety Issue:   No


  Serious Adverse Events


  Other Adverse Events


  Limitations and Caveats
  Hide Limitations and Caveats

Limitations of the study, such as early termination leading to small numbers of participants analyzed and technical problems with measurement leading to unreliable or uninterpretable data
No text entered.


  More Information