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A single oral dose of 95 mg of GSK2118436 containing approximately 80 µCi of radioactivity

GSK2118436

GSK Clinical Trials

The study is a Phase 1, open-label study designed to characterize the absorption, distribution, metabolism and excretion of GSK2118436 following administration of a single oral 14C labeled dose of GSK2118436 as a suspension in subjects with BRAF mutation positive tumors.

GSK2118436 is an orally administered, potent and selective small molecule BRAF inhibitor that is being developed for the treatment of BRAF mutation-positive tumors. The study is a Phase 1, open-label study designed to characterize the absorption, distribution, metabolism and excretion of GSK2118436 following administration of a single oral 14C labeled dose of GSK2118436 as a suspension in subjects with BRAF mutation positive tumors. A sufficient number of subjects will be enrolled to complete approximately four subjects. Following completion of the study, subjects may continue dosing with GSK2118436 in the rollover study, BRF114144.

An Absorption, Distribution, Metabolism and Excretion (ADME) Study of Single Oral Dose [14C] GSK2118436 in Subjects With BRAF Mutant Solid Tumors

An Open-Label Study to Characterize the Absorption, Distribution, Metabolism and Elimination of a Single Oral 14C Labeled Dose of GSK2118436 in Subjects With BRAF Mutant Solid Tumors

GlaxoSmithKline

Anticoagulants

Lipid Regulating Agents

Anti-Infective Agents

Warfarin

Gemfibrozil

Ketoconazole

Clotrimazole

Miconazole

Antifungal Agents

Cytochrome P-450 Enzyme Inhibitors

Hormones

Hormone Antagonists

Cytochrome P-450 CYP3A Inhibitors

Hypolipidemic Agents

Antimetabolites

Warfarin dosed at 15mg on Day 1 and Day 22

Ketoconazole dosed at 400mg daily on Days 19 through 22

Gemfibrozil dosed at 600mg twice daily on Days 19 through 22

GSK2118436 150mg

GSK2118436 75mg

GSK2118436 is an orally administered, potent and selective small molecule BRAF inhibitor that is being developed for the treatment of BRAF mutation-positive tumors. This is a 4-part study (in 4 separate cohorts of subjects) designed to examine the interaction potential of GSK2118436, either as a perpetrator (i.e., effect of GSK2118436 on warfarin; Part A) or victim (i.e., effect of other drugs on GSK2118436; Part B: ketoconazole and Part C: gemfibrozil), as well as to evaluate the single and repeat dose pharmacokinetic parameters of GSK2118436 (Part D). A sufficient number of subjects will be screened to obtain approximately 12 evaluable subjects each for Part A, Part B, Part C and Part D. Following completion of this study, subjects may continue dosing with GSK2118436 in the roll-over study, Protocol BRF114144.

A Pharmacokinetics Study of the Effects of GSK2118436 on Warfarin, the Effects of Ketoconazole and Gemfibrozil on GSK2118436, and the Effects of Repeat Doses of GSK2118436 in Subjects With BRAF Mutant Solid Tumors

A Four-Part, Open-Label Study to Evaluate the Effects of Repeat Dose GSK2118436 on the Single Dose Pharmacokinetics of Warfarin, the Effects of Repeat Dose Oral Ketoconazole and Oral Gemfibrozil on the Repeat Dose Pharmacokinetics of GSK2118436, and the Repeat Dose Pharmacokinetics of GSK2118436 in Subjects With BRAF Mutant Solid Tumors

Subjects will receive two 75 mg micronized gelatin capsules, dosed fasted (Regimen A) in Period 1 and two 75 mg non-micronized gelatin capsules, dosed fasted (Regimen B) in Period 2. Dosing will occur in the morning of Day 1 in each period, and dosing between periods will be separated by at least one week.

Subjects will receive two 75 mg non-micronized gelatin capsules, dosed fasted (Regimen B) in Period 1 and two 75 mg micronized gelatin capsules, dosed fasted (Regimen A) in Period 2. Dosing will occur in the morning of Day 1 in each period, and dosing between periods will be separated by at least one week.

Subjects will receive two 75 mg micronized HPMC capsules, dosed fasted (Regimen C) in Period 1 and two 75 mg micronized HPMC capsules, dosed with a high-fat meal (Regimen D) in Period 2. Dosing will occur in the morning of Day 1 in each period, and dosing between periods will be separated by at least one week.

Subjects will receive two 75 mg micronized HPMC capsules, dosed with a high-fat meal (Regimen D) in Period 1 and two 75 mg micronized HPMC capsules, dosed fasted (Regimen C) in Period 2. Dosing will occur in the morning of Day 1 in each period, and dosing between periods will be separated by at least one week.

Two gelatin capsules containing 75 mg GSK2118436A (dosed as the mesylate salt, micronized particles, equivalent to 150 mg free base), dosed fasted

Regimen A

Two gelatin capsules containing 75 mg GSK2118436A (dosed as the mesylate salt, larger, non-micronized particles, equivalent to 150 mg free base), dosed fasted

Regimen B

Two Hydroxy Propyl Methyl Cellulose (HPMC) capsules containing 75 mg GSK2118436A (dosed as the mesylate salt, micronized particles, equivalent to 150 mg free base), dosed fasted

Regimen C

Two HPMC capsules containing 75 mg GSK2118436A (dosed as the mesylate salt, micronized particles, equivalent to 150 mg free base), dosed with a high-fat meal

Regimen D

The study is designed to evaluate the effects of a high fat meal on the pharmacokinetics of 150 mg of GSK2118436, as well as the effects of particle size on the relative bioavailability of GSK2118436.

GSK2118436 is an orally administered, potent and selective small molecule BRAF inhibitor that is currently being developed for the treatment of BRAF mutation-positive tumors. This study is designed to evaluate the effects of particle size on the relative bioavailability of GSK2118436 (Cohort 1) and to evaluate the effects of a high-fat meal on the pharmacokinetics of GSK2118436 (Cohort 2). Subjects will randomly receive two of four possible regimens over two periods. Subjects enrolled in Cohort 1 will receive a single 150 mg dose of GSK2118436 as micronized particles fasted (gelatin capsule formulation) and a single 150 mg dose of GSK2118436 as non-micronized particles fasted (larger particle size). Subjects enrolled in Cohort 2 will receive a single 150 mg dose of GSK2118436 (HydroxyPropyl Methyl Cellulose (HPMC) capsule formulation) fasted and with a high-fat breakfast. GSK2118436 will be administered as the mesylate salt (equivalent to 150 mg free base). Safety and tolerability will also be evaluated. The study will be conducted at a sufficient number of centers to complete approximately 28 adult subjects (14 subjects per cohort) with BRAF mutation-positive tumors. Following completion of this study, subjects may continue dosing with GSK2118436 in the roll-over study, Protocol BRF114144.

An Open Label Study to Examine the Effects of a High-Fat Meal and Particle Size on the Pharmacokinetics of Orally Administered GSK2118436 in Subjects With BRAF Mutation Positive Tumor

An Open-Label Study to Examine the Effects of a High-Fat Meal and Particle Size on the Pharmacokinetics of Orally Administered GSK2118436 in Subjects With BRAF Mutation-Positive Tumor

Study title	NCT ID	Conditions	Interventions	Eligibility	Organization
An Absorption, Distribution, Metabolism and Excretion (ADME) Study of Single Oral Dose [14C] GSK2118436 in Subjects With BRAF Mutant Solid Tumors	NCT01262963	Cancer	GSK2118436	18 Years -	GlaxoSmithKline
An Absorption, Distribution, Metabolism and Excretion (ADME) Study of Single Oral Dose [14C] GSK2118436 in Subjects With BRAF Mutant Solid Tumors	NCT01262963	Cancer	GSK2118436	18 Years -	GlaxoSmithKline
A Pharmacokinetics Study of the Effects of GSK2118436 on Warfarin, the Effects of Ketoconazole and Gemfibrozil on GSK2118436, and the Effects of Repeat Doses of GSK2118436 in Subjects With BRAF Mutant Solid Tumors	NCT01340846	Cancer	Warfarin Ketoconazole Gemfibrozil GSK2118436 150m... GSK2118436 75mg	18 Years -	GlaxoSmithKline
An Open Label Study to Examine the Effects of a High-Fat Meal and Particle Size on the Pharmacokinetics of Orally Administered GSK2118436 in Subjects With BRAF Mutation Positive Tumor	NCT01231568	Cancer	Regimen A Regimen B Regimen C Regimen D	18 Years -	GlaxoSmithKline

Spots Global Cancer Trial Database for braf positive tumor