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GSK1322322

Phase 2

Skin Infections, Bacterial | Small molecule | Infectious Disease |GSK plc|Last Updated: Dec 4, 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
RandomizedDouble-BlindACTIVE_CONTROLLEDBiomarker
Total Trials1
Total Enrollment84
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT01209078GSK1322322 Versus Linezolid in the Treatment of Acute Bacterial Skin and Skin Structure InfectionPHASE2 COMPLETED 84Aug 17, 2010Jan 18, 2011Dec 4, 20177 United States
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Study Endpoints
Primary Endpoints
Number of Participants With Any Adverse Events (AE) and Serious Adverse Events (SAE)
Up to Follow-up (28 Day Follow-up, Day 40)

An AE is defined as any untoward medical occurrence in a participant, temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product. An SAE is defined as any untoward medical occurrence that, at any dose, results in death, is life-threatening, requires hospitalization or prolongation of existing hospitalization, results in disability/incapacity, or is a congenital anomaly/birth defect, may jeopardize the participant or may require medical or surgical intervention to prevent one of the other outcomes listed in this definition, associated with liver injury and impaired liver function defined as alanine aminotransferase (ALT) \>=3 x upper limit of normal (ULN), and total bilirubin \>=2 x ULN or international normalised ratio \>1.5.

Mean Clinical Chemistry Parameters of Albumin and Total Protein at Indicated Time Points
Up to Follow-up (28 Day Follow-up, Day 40)

Blood samples were obtained for analysis of albumin and total protein at Day 1, Day 4, Day 8, Day 11, 7 Day Follow-up and 28 Day Follow-up. Baseline value was defined as the assessment done on Day 1.

Mean Clinical Chemistry Parameters of ALT, Alkaline Phosphatase (ALP), Aspartate Aminotransferase (AST), Follicle Stimulating Hormone (FSH), Gamma Glutamyl Transferase (GGT), Lactate Dehydrogenase (LDH) and Creatine Kinase at Indicated Time Points
Up to Follow-up (28 Day Follow-up, Day 40)

Blood samples were obtained for analysis of ALT, ALP, AST, FSH, GGT, LDH and creatine kinase at Day 1, Day 4, Day 8, Day 11, 7 Day Follow-up and 28 Day Follow-up. Baseline value was defined as the assessment done on Day 1.

Mean Clinical Chemistry Parameters of Creatinine, Uric Acid, Direct Bilirubin and Total Bilirubin at Indicated Time Points
Up to Follow-up (28 Day Follow-up, Day 40)

Blood samples were obtained for analysis of creatinine, uric acid, direct bilirubin and total bilirubin at Day 1, Day 4, Day 8, Day 11, 7 Day Follow-up and 28 Day Follow-up. Baseline value was defined as the assessment done on Day 1.

Mean Clinical Chemistry Parameters of Glucose, Sodium, Calcium, Potassium, Chloride, Carbon Dioxide (CO2) Content /Bicarbonate and Urea/ Blood Urea Nitrogen (BUN) at Indicated Time Points
Up to Follow-up (28 Day Follow-up, Day 40)

Blood samples were obtained for analysis of glucose, sodium, calcium, potassium, chloride, CO2 content /bicarbonate and urea/BUN at Day 1, Day 4, Day 8, Day 11, 7 Day Follow-up and 28 Day Follow-up. Baseline value was defined as the assessment done on Day 1.

Mean Clinical Chemistry Parameter of Estradiol at Indicated Time Point
Day 1

Blood samples were obtained for analysis of estradiol at Day 1.

Mean Clinical Chemistry Parameter of High Sensitivity C-Reactive Protein at Indicated Time Points
Up to Follow-up (7 Day Follow-up, Day 19)

Blood samples were obtained for analysis of high sensitivity C-Reactive protein at Day 1, Day 2, Day 3, Day 4, Day 8, Day 11 and 7 Day Follow-up. Baseline value was defined as the assessment done on Day 1.

Mean Hematology Parameters of Basophils, Eosinophils, Lymphocytes, Monocytes, Total Neutrophils, White Blood Cells (WBC) and Platelet Count at Indicated Time Points
Up to Follow-up (28 Day Follow-up, Day 40)

Blood samples were obtained for analysis of basophils, eosinophils, lymphocytes, monocytes, total neutrophils, WBC and platelet count at Day 1, Day 4, Day 8, Day 11, 7 Day Follow-up and 28 Day Follow-up. Baseline value was defined as the assessment done on Day 1.

Mean Hematology Parameter of Mean Corpuscle Volume (MCV) at Indicated Time Points
Up to Follow-up (28 Day Follow-up, Day 40)

Blood samples were obtained for analysis of MCV at Day 1, Day 4, Day 8, Day 11, 7 Day Follow-up and 28 Day Follow-up. Baseline value was defined as the assessment done on Day 1.

Mean Hematology Parameter of Hemoglobin, Mean Corpuscle Hemoglobin Concentration (MCHC) at Indicated Time Points
Up to Follow-up (28 Day Follow-up, Day 40)

Blood samples were obtained for analysis of MCHC at Day 1, Day 4, Day 8, Day 11, 7 Day Follow-up and 28 Day Follow-up. Baseline value was defined as the assessment done on Day 1.

Mean Hematology Parameter of Mean Corpuscle Hemoglobin (MCH) at Indicated Time Points
Up to Follow-up (28 Day Follow-up, Day 40)

Blood samples were obtained for analysis of MCH at Day 1, Day 4, Day 8, Day 11, 7 Day Follow-up and 28 Day Follow-up. Baseline value was defined as the assessment done on Day 1.

Mean Hematology Parameter of Red Blood Cell (RBC) Count and Reticulocyte Count at Indicated Time Points
Up to Follow-up (28 Day Follow-up, Day 40)

Blood samples were obtained for analysis of RBC count and reticulocyte at Day 1, Day 4, Day 8, Day 11, 7 Day Follow-up and 28 Day Follow-up. Baseline value was defined as the assessment done on Day 1.

Mean Vital Sign Value of Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP) at Indicated Time Points
Up to Day 11

Vital sign assessments were conducted at Day 1 (pre-dose), Day 2 (pre-dose), Day 3 (pre-dose), Day 4 (4-12 hours post-dose), Day 8 (pre-dose) and Day 11. The assessments were made with the participant in a semi-supine position, having rested in that position for at least 10 minutes beforehand. Three BP measurements were taken at pre-dose on Day 1. The mean value recorded at pre-dose was classified as Baseline. Single BP was obtained at all other time points during the study.

Mean Vital Sign Value of Heart Rate (HR) at Indicated Time Points
Up to Day 11

Vital sign assessments were conducted at Day 1 (pre-dose), Day 2 (pre-dose), Day 3 (pre-dose), Day 4 (4-12 hours post-dose), Day 8 (pre-dose) and Day 11. The assessments were made with the participant in a semi-supine position, having rested in that position for at least 10 minutes beforehand. Three HR measurements were taken at pre-dose on Day 1. The mean value recorded at pre-dose was classified as Baseline. Single HR was obtained at all other time points during the study.

Mean Vital Sign Value of Respiratory Rate (RR) at Indicated Time Points
Up to Day 11

Vital sign assessments were conducted at Day 1 (pre-dose), Day 2 (pre-dose), Day 3 (pre-dose), Day 4 (4-12 hours post-dose), Day 8 (pre-dose) and Day 11. The assessments were made with the participant in a semi-supine position, having rested in that position for at least 10 minutes beforehand. Three RR measurements were taken at pre-dose on Day 1. The mean value recorded at pre-dose was classified as Baseline. Single RR was obtained at all other time points during the study.

Mean Change From Baseline in SBP and DBP at Indicated Time Points
Day 1 (Baseline) up to Day 11

Vital sign assessments were conducted at Day 1 (pre-dose), Day 2 (pre-dose), Day 3 (pre-dose), Day 4 (4-12 hours post-dose), Day 8 (pre-dose) and Day 11. The assessments were made with the participant in a semi-supine position, having rested in that position for at least 10 minutes beforehand. Three BP measurements were taken at pre-dose on Day 1. The mean value recorded at pre-dose was classified as Baseline. Single BP was obtained at all other time points during the study. The change from Baseline was calculated by subtracting the Baseline value from the individual post-Baseline (Day 2, Day 3, Day 4, Day 8 and Day 11) values. If either the Baseline or post-Baseline value was missing, the change from Baseline was set to missing as well.

Mean Change From Baseline in HR at Indicated Time Points
Day 1 (Baseline) up to Day 11

Vital sign assessments were conducted at Day 1 (pre-dose), Day 2 (pre-dose), Day 3 (pre-dose), Day 4 (4-12 hours post-dose), Day 8 (pre-dose) and Day 11. The assessments were made with the participant in a semi-supine position, having rested in that position for at least 10 minutes beforehand. Three HR measurements were taken at pre-dose on Day 1. The mean value recorded at pre-dose was classified as Baseline. Single HR was obtained at all other time points during the study. The change from Baseline was calculated by subtracting the Baseline value from the individual post-Baseline (Day 2, Day 3, Day 4, Day 8 and Day 11) values. If either the Baseline or post-Baseline value was missing, the change from Baseline was set to missing as well.

Mean Change From Baseline in RR at Indicated Time Points
Day 1 (Baseline) up to Day 11

Vital sign assessments were conducted at Day 1 (pre-dose), Day 2 (pre-dose), Day 3 (pre-dose), Day 4 (4-12 hours post-dose), Day 8 (pre-dose) and Day 11. The assessments were made with the participant in a semi-supine position, having rested in that position for at least 10 minutes beforehand. Three RR measurements were taken at pre-dose on Day 1. The mean value recorded at pre-dose was classified as Baseline. Single RR was obtained at all other time points during the study. The change from Baseline was calculated by subtracting the Baseline value from the individual post-Baseline (Day 2, Day 3, Day 4, Day 8 and Day 11) values. If either the Baseline or post-Baseline value was missing, the change from Baseline was set to missing as well.

Mean Electrocardiogram (ECG) Values at Indicated Time Points
Up to Day 11

12-lead ECGs were obtained during the study using an ECG machine that automatically calculated the heart rate and measured PR, QRS, RR, QT, and QTc intervals. It was performed with the participant in a semi-supine position having rested in that position for at least 10 minutes beforehand. Three measurements were taken at pre-dose on Day 1 at least 5 minutes apart. The mean PR interval, RR interval, QRS duration, uncorrected QT interval (UncQT) and QTcB (QT corrected by Bazett's formula) and QTcF (corrected by Friedericia's formula) was calculated from automated ECG readings. The assessments were done at Day 1 (pre-dose, 0.25-1.5 hours post-initial dose and 1.5-3 hours post-initial dose), Day 4 (4-12 hours post-morning dose), Day 8 (pre-morning dose) and Day 11 (0 hour). The mean value recorded pre-dose on Day 1 was classified as Baseline.

Mean Change From Baseline in ECG Values at Indicated Time Points
Day 1 (pre-dose, Baseline) up to Day 11

12-lead ECGs were obtained during the study using an ECG machine that automatically calculated the heart rate and measured PR, QRS, RR, QT, and QTc intervals. It was performed with the participant in a semi-supine position having rested in that position for at least 10 minutes beforehand. Three measurements were taken at pre-dose on Day 1 at least 5 minutes apart. The mean PR interval, RR interval, QRS duration, uncorrected QT interval (UncQT) and QTcB (QT corrected by Bazett's formula) and QTcF (corrected by Friedericia's formula) was calculated from automated ECG readings. The assessments were done at Day 1 (pre-dose, 0.25-1.5 hours post-initial dose and 1.5-3 hours post-initial dose), Day 4 (4-12 hours post-morning dose), Day 8 (pre-morning dose) and Day 11 (0 hour). Mean value recorded pre-dose on Day 1 was classified as Baseline. Change from Baseline was calculated by subtracting the Baseline value from individual post-Baseline (Day 1 post-dose, Day 4, Day 8 and Day 11) values.

Mean ECG Rhythms at Indicated Time Points
Up to Day 11

12-lead ECGs were obtained during the study using an ECG machine that automatically calculated the heart rhythm and measured PR, QRS, RR, QT, and QTc intervals. It was performed with the participant in a semi-supine position having rested in that position for at least 10 minutes beforehand. Three measurements were taken at pre-dose on Day 1 at least 5 minutes apart and the mean of the three measurements was calculated. The assessments were done at Day 1 (pre-dose, 0.25-1.5 hours post-initial dose and 1.5-3 hours post-initial dose), Day 4 (4-12 hours post-morning dose), Day 8 (pre-morning dose) and Day 11 (0 hour).

Mean Change From Baseline in ECG Rhythms at Indicated Time Points
Day 1 (pre-dose, Baseline) up to Day 11

12-lead ECGs were obtained during the study using an ECG machine that automatically calculated the heart rhythm and measured PR, QRS, RR, QT, and QTc intervals. It was performed with the participant in a semi-supine position having rested in that position for at least 10 minutes beforehand. Three measurements were taken at pre-dose on Day 1 at least 5 minutes apart and the mean of the three measurements was calculated. The assessments were done at Day 1 (pre-dose, 0.25-1.5 hours post-initial dose and 1.5-3 hours post-initial dose), Day 4 (4-12 hours post-morning dose), Day 8 (pre-morning dose) and Day 11 (0 hour). The value recorded pre-dose on Day 1 was the Baseline. The change from Baseline was calculated by subtracting the Baseline value from the individual post-Baseline (Day 1 post-dose, Day 4, Day 8 and Day 11) values.

Number of Participants With Abnormal Transition From Baseline in Clinical Chemistry Values Relative to Normal Range
Day 1 (pre-dose, Baseline) up Follow-up (28 Day Follow-up, Day 40)

The parameters of clinical chemistry included albumin, total protein, ALT, ALP, AST, GGT, LDH and creatine kinase, creatinine, uric acid, direct bilirubin, total bilirubin, glucose, sodium, calcium, potassium, chloride, CO2 content /bicarbonate and urea/BUN and high sensitivity C-Reactive protein. The assessments were done at Day 1, Day 4, Day 8, Day 11, 7 Day Follow-up and 28 Day Follow-up. Baseline was defined as the assessment done on Day 1 (pre-dose). Data is reported for number of participants with abnormal transition from Baseline 'to high' or 'to low' relative to normal range. Only those parameters for which at least one value of abnormal transition was reported are summarized.

Number of Participants With Abnormal Transition From Baseline in Hematology Values Relative to Normal Range
Day 1 (pre-dose, Baseline) up Follow-up (28 Day Follow-up, Day 40)

The parameters of clinical chemistry included basophils, eosinophils, lymphocytes, monocytes, total neutrophils, WBC count, platelet count, MCV, hemoglobin, MCHC, MCH, RBC count and reticulocyte count. The assessments were done at Day 1, Day 4, Day 8, Day 11, 7 Day Follow-up and 28 Day Follow-up. Baseline was defined as the assessment done on Day 1 (pre-dose). Data is reported for number of participants with abnormal transition from Baseline 'to high' or 'to low' relative to normal range. Only those parameters for which at least one value of abnormal transition was reported are summarized.

Secondary Endpoints
Number of Participants With Clinical Success of Clinical Response
Up to Follow-up (28 Day Follow-up, Day 40)
Percentage of Participants With Clinical Success of Clinical Outcome
Day 11 (end of therapy) and Follow-up (7 Day Follow-up, Day 19)
Percentage of Participants With Microbiological Success of Microbiological Outcome at End of Therapy
Day 11 (end of therapy)
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Study Design & Arms
AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Regimen 1EXPERIMENTALGSK1322322 1500mg and Placebo Linezolid given twice a day (BID) for 10 days
Regimen 2ACTIVE_COMPARATORLinezolid 600mg and placebo GSK1322322 given BID for 10 days
Interventions
NameTypeDescription
GSK1322322DRUGGSK1322322 1500mg BID
LinezolidDRUGLinezolid 600mg
GSK1322322 placeboDRUGPlacebo
Linezolid placeboDRUGplacebo
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Eligibility Criteria
Age Range18 Years — N/A
SexALL
Healthy VolunteersNo
Study Sites7

Inclusion Criteria: * Male or female subject age 18 years or older at the time of signing the informed consent * Male subjects must agree to use one of the contraception methods listed * A female is eligible to enter and participate in this study if she is of non-childbearing potential * The subjec...

Countries:United States
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