Phase I, Open Label, Two Period Study to Evaluate the Effects of Fosamprenavir/Ritonavir on GSK1349572 Pharmacokinetics and a Phase I, Randomized, Three-Way Crossover Study to Evaluate the Relative Bioavailability of Three Tablet Variants Made Using Micronized, Unmicronized and Intermediate Particle Sizes of GSK1349572 in Healthy Adult Subjects
Sponsor study identifier
interventional
27
1 country
1
Study Start
September 2010
Date type not reportedThis date has not been verified as actual or estimated.
Primary Completion
November 2010
Actual (reported)Study Completion
November 2010
Actual (reported)GSK1349572 is an integrase inhibitor being developed for the treatment of human immunodeficiency virus (HIV)-1 infection by GlaxoSmithKline (GSK) on behalf of Shionogi-ViiV HealthcareLLC. In HIV-infected patients where combination antiretroviral therapy is the standard of care, it is likely that it will be dosed with boosted protease inhibitors (PIs) including fosamprenavir/ritonavir (FPV/RTV or FPV/r). As FPV and RTV are modulators (induction as well as inhibition) of Uridine diphosphate glucuronosyltransferase (UGT) and Cytochrome P450 (CYP)3A which are the primary and secondary metabolic pathways of GKS1349572, it is likely that FPV/RTV will affect the pharmacokinetics (PK) of GSK1349572, therefore a drug interaction study is warranted and will be evaluated in Part A of this study. Part B will evaluate the effect of particle size of tablet variants on the PK of GSK1349572. In Part A, approximately 12 subjects will receive GSK1349572 50mg every 24 hours (q24h) for 5 days (Treatment A). Subjects will then be administered GSK1349572 50mg q24h in combination with FPV/RTV 700/100 mg every 12 hours (q12h) (Treatment B) for 10 days. There will be no washout between treatments. In Part B 15 subjects will receive a single 50 mg dose (2 x 25mg tablet) in 3 different tablet variants of the same formulation, differing only in particle sizes of GSK1349572, under fasted conditions in a three-way crossover design. Safety evaluations and serial PK samples will be collected during each treatment period. A follow-up visit will occur 7-14 days after the last dose of study drug.
Registry-reported information. Elapsed time and enrollment totals alone do not measure study progress or recruitment pace.
November 2010
Actual (reported)Click on a node to explore related trials.
Dates and qualifiers reported by the registry. Estimated dates do not confirm that a milestone has occurred.
August 30, 2010
Actual (reported)September 2010
Date type not reportedThis date has not been verified as actual or estimated.
September 24, 2010
Actual (reported)November 2010
Actual (reported)November 2010
Actual (reported)Plasma GSK1349572 steady-state AUC(0-tau), Cmax, C0, Ctau, and Cmin following administration of GSK1349572 50 mg q24h for 5 days and following co-administration with FPV/RTV 700/100 mg q12h for 10 days
15 days
Plasma GSK1349572 AUC(0-infinity), AUC(0-t), and Cmax following a single dose of GSK1349572 50 mg
48 hours
Safety and tolerability parameters, including adverse events, concurrent medication, clinical laboratory tests, ECG, and vital signs assessments
15 days
Plasma amprenavir (APV) steady-state AUC(0-tau), Cmax, C0, Ctau, t½, and CL/F following administration of GSK1349572 50 mg q24h co-administered with FPV/RTV 700/100 mg q12h for 10 days
15 days
Plasma GSK1349572 steady-state tmin, t1/2 and CL/F following administration of GSK1349572 50 mg q24h for 5 days and following co-administration with FPV/RTV 700/100 mg q12h for 10 days
15 days
Plasma GSK1349572 C24, t1/2, tlag, tmax, CL/F and Vz/F following a single dose of GSK1349572 50 mg
48 hours
Approximately 12 subjects will be enrolled. In the first treatment period, all subjects will receive GSK1349572 50 mg every 24 hours for 5 days. In Period 2, subjects will receive GSK1349572 50 mg every 24 hours in combination with fosamprenavir 700 mg plus ritonavir 100 mg every 12 hours for 10 days. Day 1 of Period 2 will be the day after Day 5 of Period 1. Subjects will have a screening visit within 30 days prior to the first dose of study drug, two treatment periods, and a follow-up visit 7-14 days after the last dose of study drug.
Approximately 15 subjects will be enrolled and receive three single doses of GSK1349572 approximately one week apart. One will be the current tablet formulation containing micronized drug substance and 2 will be new tablet versions, one containing unmicronized drug substance and one containing an intermediate particle size drug substance. Subjects will have a screening visit within 30 days prior to the first dose of study drug, three treatment periods, and a follow-up visit 7-14 days after the last dose of study drug.
GSK1349572 is an integrase inhibitor being developed for the treatment of human immunodeficiency virus -1 infection by ViiV Healthcare. This drug is experimental and has not been approved by the Food and Drug Administration (FDA).
Fosamprenavir is a drug in the protease inhibitor class that is approved by the FDA for the treatment of HIV infection.
GSK Investigational Site
Buffalo, New York, 14202, United States
Song I, Borland J, Chen S, Peppercorn A, Wajima T, Piscitelli SC. Effect of fosamprenavir-ritonavir on the pharmacokinetics of dolutegravir in healthy subjects. Antimicrob Agents Chemother. 2014 Nov;58(11):6696-700. doi: 10.1128/AAC.03282-14. Epub 2014 Aug 25.
GSK Clinical Trials
ViiV Healthcare
27 participants (actual enrollment reported by the registry).
First Submitted
August 30, 2010
First Posted
September 24, 2010
Study Start
September 2010
Date type not reportedThis date has not been verified as actual or estimated.
Ritonavir is a drug in the protease inhibitor class that is approved by the FDA for the treatment of HIV infection.
Contact the study team to confirm eligibility.
Primary Completion
November 2010
Actual (reported)Study Completion
November 2010
Actual (reported)Last Updated
January 19, 2017
Record last verified: 2017-01
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