The primary objectives of this study are to assess the safety, tolerability and pharmacokinetics of GSK1322322 following intravenous (IV) and oral administration. GSK1322322 shows broad spectrum antibacterial activity against pathogens involved in respiratory tract infections as well as methicillin-resistant S. Aureus (MRSA). This study consists of three parts (Part A, Part B and Part C). The results from Part A of this study will enable use of large-scale, commercial tablets produced for administration to patients in pivotal clinical trials of GSK1322322. The results from Parts B and C will support enrolment of Japanese subjects in future clinical studies. Additionally, the results will support the dose selection for further clinical development of GSK1322322 in hospitalized patients with severe bacterial infections in Japan and other Asian populations. In Part A, subjects will undergo screening, 4 treatment periods receiving single dose of each of: 1500 mg Initial, fit-for-purpose tablet (product code AP), 1500 mg Over granulated tablet (product code AR), and the 1500 mg and 2000 mg of intended commercial tablets (product code AU). In Part B of the study subjects will undergo screening, and be randomized to receive 3 doses of GSK1322322 oral cohort (100 mg, 1500 mg and 2000 mg) or IV cohort (600 mg, 900 mg and 1200 mg) each in 3 treatment periods. Part C will be a single-blind, placebo-controlled, repeat dose study of GSK1322322 in healthy Japanese male subjects. GSK1322322 will be administered (fasted) via IV for 4 days BID, followed by administration of GSK1322322 orally (fed) for 6 days BID. A follow-up evaluation will be conducted 7-10 days following last dose of for each subjects in each Part of the study. Approximately 12 subjects will be enrolled in each part of the study such that approximately 8, 6, and 9 subjects complete dosing and critical assessments in part A,B, and C respectively.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
TRIPLE
Enrollment
12
Beige, capsule shaped, film-coated tablet with unit dose strength of 500 mg/tablet and dose level of 1500 mg (3 x 500 mg) for single dose oral administration in Part A
Light beige, oval shaped, film-coated tablet with unit dose strength of 500 mg/tablet and dose level of 1500 mg (3 x 500 mg) for single dose oral administration in Part A
Light beige, oval shaped, film-coated tablet with unit dose strength of 500 mg/tablet and dose level of 1000 mg (2 x 500),1500 mg (3 x 500 mg) and 2000 mg (4 x 500mg) for single dose oral administration in Part A and B and repeat dose administration twice daily in Part C
Light beige, oval-shaped, film-coated tablet for repeat dose oral administration (BID for 6 days) in Part C
White to slightly colored non-sterile crystalline powder for oral suspension with dose level of 50 mg as a single dose with GSK1322322 tablets in Part A
White to slightly colored lyophilized powder cake in clear glass vials with unit dose strength of 400 mg/vial and dose levels of 600 mg (1.5 x 400 mg/vial), 900 mg (2.25x400mg/vial), 1200 mg (3x400mg/vial and 1200 mg (3 x 400 mg) for IV administration either as single dose in Part B or as a repeat dose (BID for 4 days) in Part C
A clear and colorless 0.9% Sodium Chloride solution for intravenous administration twice daily for 4 days in Part C
GSK Investigational Site
Overland Park, Kansas, United States
Composite of PK parameters for single oral dose of GSK1322322 in Part A
PK parameters include: area under the concentration-time curve from time zero (pre-dose) to last time of quantifiable concentration within a subject across all treatments (AUC\[0-t\]), area under the concentration-time curve from time zero (pre-dose) extrapolated to infinite time (AUC\[0-infinite\]), maximum observed concentration (Cmax), time of occurrence of Cmax (tmax), and terminal phase half-life (t1/2)
Time frame: Up to 16 days in Part A. Collection will be done for each period at pre-dose, 0.25, 0.5, 1, 2, 4, 6, 8, 12, 18, 24, 36, 48, and 72 hours post dose
AUC(0-infinite) comparison for bioavailability assessment for three formulations of GSK1322322 in Part A
To evaluate the relative oral bioavailability, the AUC (0-infinite) of the three formulations (Initial fit-for-purpose tablets, Over-granulated tablets, and Intended commercial tablets) will be compared. Bioavailability is defined as the amount of drug available at the site of action after administration
Time frame: Up to 16 days in Part A. Collection will be done for each period at pre-dose, 0.25, 0.5, 1, 2, 4, 6, 8, 12, 18, 24, 36, 48, and 72 hours post dose
Composite of PK parameters to assess dose proportionality of the GSK1322322 Over-granulated formulation tablets of 1500 mg and 2000 mg
PK parameters include: AUC (0-infinite) and Cmax. to demonstrate similar or different bioavailability across the two dose levels in Part A
Time frame: Up to 16 days in Part A. Collection will be done for each period at pre-dose, 0.25, 0.5, 1, 2, 4, 6, 8, 12, 18, 24, 36, 48, and 72 hours post dose
Composite of PK parameters for single oral dose of GSK1322322 in healthy Japanese subjects in Part B
PK parameters include: AUC(0-t), AUC (0-infinite), Cmax, tmax, and t1/2
Time frame: Up to 12 days in Part B. Collection will be done at pre-dose, 0.25, 0.5, 1, 2, 4, 6, 8, 12, 18, 24, 36, 48 and 72 hours post dose
Composite of PK parameters for single intravenous (IV) dose of GSK1322322 in healthy Japanese subjects in Part B
PK parameters include: AUC(0-t), AUC (0-infinite), Cmax, volume of distribution at steady state (Vss), mean residence time intravenous (MRTiv), t1/2, and systemic clearance of parent drug (CL)
Time frame: Up to 12 days in Part B. Collection will be done at pre-dose 0.25, 0.5, 1, 2, 4, 6, 8, 12, 18, 24, 36, 48 and 72 hours post infusion start
Composite of PK parameters for repeat IV dose of GSK1322322 in healthy Japanese subjects in Part C
In Part C, on Day 1 after the morning IV dose, area under the concentration-time curve from time zero (pre-dose) to 12 hours after dosing \[AUC(0-12)\] and Cmax will be computed; on Day 4 after the morning IV dose, area under the concentration-time curve over the dosing interval \[AUC(0-tau)\], Cmax, and systemic clearance at steady state (CLss) will be computed; on Day 10, after the oral morning dose, AUC(0-tau), Cmax, tmax, will be computed
Time frame: Up to 10 days in Part C. Collection will be done at pre-dose 0.25, 0.5, 1, 2, 4, 6, 8, 12 hours post dose on Day 1, Day 4 and Day 10
Safety and tolerability of single oral dose of GSK1322322 in healthy subjects assessed by the collection of adverse events (AEs) in Part A
AEs will be collected from the start of study treatment and until the follow-up contact
Time frame: Up to 23 days
Collection of AEs to assess safety and tolerability of single oral and IV GSK1322322 doses in healthy Japanese male subjects in Part B
AEs will be collected from the start of study treatment and until the follow-up contact
Time frame: Up to19 days
Collection of AEs to assess safety and tolerability of repeat oral and IV GSK1322322 doses in healthy Japanese male Subjects in Part C
AEs will be collected from the start of study treatment and until the follow-up contact
Time frame: Up to18 days
Safety as assessed by hematology, clinical chemistry, urinalysis, vital signs, electrocardiogram (ECG) intervals, ECG rhythm in healthy subjects in Part A
Absolute values and changes over time of hematology, clinical chemistry, urinalysis, vital signs (blood pressure \[BP\], and heart rate), ECG intervals, and ECG rhythm will be measured
Time frame: Up to 23 days
Safety as assessed by hematology, clinical chemistry, urinalysis, vital signs, ECG intervals, ECG rhythm in healthy Japanese male Subjects in Part B
Absolute values and changes over time of hematology, clinical chemistry, urinalysis, vital signs (BP and heart rate), ECG intervals, and ECG rhythm will be measured
Time frame: Up to 19 days
Safety as assessed by hematology, clinical chemistry, urinalysis, vital signs, ECG intervals, ECG rhythm in healthy Japanese male Subject in Part C
Absolute values and changes over time of hematology, clinical chemistry, urinalysis, vital signs (BP and heart rate), ECG intervals, and ECG rhythm will be measured
Time frame: Up to 18 days
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Dose proportionality of GSK1322322 following IV and oral single dose in Part B
To evaluate doe proportionality AUC(0-infinity) following oral and IV administration at different doses
Time frame: Up to 12 days. Collection will be done at pre-dose, 0.25, 0.5, 1, 2, 4, 6, 8, 12, 18, 24, 36, 48 and 72 hours post dose
GSK1322322 accumulation ratio following repeat IV administration in Part C
To evaluate the accumulation ratio following repeat IV administration of GSK1322322, Day 4 GSK1322322 AUC(0-tau) from the morning dose will be compared to AUC(0-12) on Day 1 from the morning dose
Time frame: Day 1 and Day 4. Collection will be done at pre-dose, 0.25, 0.5, 1, 2, 4, 6, 8, 12 hours post infusion start
The potential relationship of CL/CLss following single IV dose versus body weight in Part B
To estimate the effect of body weight on PK parameter of GSK1322322, the potential relationship of CL/CLss following single IV dose versus body weight will be explored
Time frame: Up to 12 days. Collection will be done at pre-dose, 0.25, 0.5, 1, 2, 4, 6, 8, 12, 18, 24, 36, 48 and 72 hours post infusion start
The potential relationship of CL/CLss following repeat IV doses versus body weight in Part C
To estimate the effect of body weight on PK parameter of GSK1322322, the potential relationship of CL/CLss following repeat IV doses versus body weight will be explored
Time frame: Up to 10 days. Collection will be done at pre-dose 0.25, 0.5, 1, 2, 4, 6, 8, 12 hours post infusion