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In Part 1, subjects in sequential cohorts will receive single ascending doses of intravenous (IV) injection of GSK1795091 or matching placebo, with a starting dose of 7 nanogram (ng), on Day 1 until the highest dose is evaluated.

In Part 2 Cohort 1, subjects will receive IV injection of GSK1795091 on Day 1, at dose determined in part 1, and second dose on Day 8 (one week apart)

In Part 2 Cohort 2, subjects will receive IV injection of GSK1795091 on Day 1, at dose determined in part 1, and a second dose on Day 15 (two weeks apart)

GSK1795091 will be supplied as solution for injection vial. Each 5 mL vial contains 0.001 milligram/mL (mg/mL; 1000 ng/mL) or 0.0001 mg/mL (100 ng/mL)of GSK1795091 and will be administered as IV bolus over 2-5 minutes (min) followed by a IV bolus of 10 mL normal saline.

GSK1795091

Matching placebo will be supplied as a solution for injection vial and will be administered as IV bolus over 2-5 min followed by a IV bolus of 10 mL normal saline

Placebo

GSK Clinical Trials

This study is an ascending dose first-time-in-human study to determine the safety, tolerability, pharmacodynamic (PD), and pharmacokinetics (PK) profile of GSK1795091 in healthy subjects. The results will support the design of future clinical trials of GSK1795091 administered to subjects with advanced malignancies in combination with immune system modulators.

Part 1 will be a randomized, double-blind (sponsor-unblinded), placebo-controlled, single center, single dose escalation, sequential group evaluation of intravenously administered GSK1795091 to evaluate the safety and tolerability in healthy subjects. Part 2 will be an open-label, parallel group evaluation of 2 doses of GSK1795091 administered, either 1 week apart (Part 2, Cohort 1) or 2 weeks apart (Part 2, Cohort 2). In Part 2, on Day 1, subjects will receive intravenous GSK1795091 at a dose determined by results from Part 1. The total duration of this study is approximately 10 weeks from screening to the last study visit.

A Phase I, 2-part (Part 1 Being a Single Dose Escalation and Part 2, a Parallel Group) Study of Toll-like Receptor (TLR4) Agonist (GSK1795091) in Healthy Subjects

A 2-part Randomized, Double-blind (Sponsor-unblinded), Placebo-controlled, Ascending Dose and Parallel Group Study of TLR4 Agonist (GSK1795091) Administered to Healthy Subjects

IPD for this study is available via the Clinical Study Data Request site.

An AE is any untoward medical occurrence in a clinical investigation participant, temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product. Any untoward event resulting in death, life threatening, requires hospitalization or prolongation of existing hospitalization, results in disability/incapacity, congenital anomaly/birth defect, any other situation according to medical or scientific judgment or events associated with liver injury and impaired liver function were categorized as SAE. All participants enrolled into the study who have received a dose of study medication (GSK1795091 or placebo) were included in the All Subjects Population. Participants with non-serious AEs (5 percentage threshold) and SAEs has been reported.

Body temperature was measured in semi-supine position after 5 minutes rest. Baseline values are the last non-missing pre-dose assessments. Change from Baseline was defined as difference between the post-Baseline visit value and the Baseline value.

Systolic and diastolic BP was measured in semi-supine position after 5 minutes rest. Baseline values are the last non-missing pre-dose assessments. Change from Baseline was defined as difference between the post-Baseline visit value and the Baseline value.

Pulse rate was measured in semi-supine position after 5 minutes rest. Baseline values are the last non-missing pre-dose assessments. Change from Baseline was defined as difference between the post-Baseline visit value and the Baseline value.

Respiratory rate was measured in semi-supine position after 5 minutes rest. Baseline values are the last non-missing pre-dose assessments. Change from Baseline was defined as difference between the post-Baseline visit value and the Baseline value.

Hematology parameters included hemoglobin (HGB), hematocrit (HCT), Red Blood Cell (RBC) count, White Blood Cell (WBC) count with differential (neutrophils, lymphocytes, monocytes, eosinophils, basophils), platelet count, mean corpuscular volume (MCV), mean corpuscular hemoglobin (MCH) and mean corpuscular hemoglobin concentration (MCHC). Reference range for basophil was 0.01 - 0.07\*10\^9/Liters (L), eosinophils 0.03 - 0.5\*10\^9/L, HCT 0.38 - 0.48 proportion of RBC in blood, HGB 126 - 165\*gram (g)/L, lymphocytes 1.08 - 3\*10\^9/L, MCH 26.3 - 32.8\*picogram (pg), MCHC 324 - 359\*g/L, MCV 77 - 94.9\*femtoliter (fL), monocytes 0.3 - 0.92\*10\^9/L, neutrophils 1.46 - 5.85\*10\^9/L, platelets 155 - 342\*10\^9/L, erythrocytes 4.12 - 5.74\*10\^12/L, leukocytes 3.19 - 8.71\*10\^9/L. Values below these ranges were considered as low and above these ranges were considered as high (H). Data for participants from any visit post-screening with values \> reference range high and \< reference range low are report.

Clinical chemistry parameters with reference range were albumin 35-52\*g/L, Alkaline phosphatase (ALP) 30-120\*International units/L (IU/L), Alanine aminotransferase (ALT) 0-50 \* IU/L, Aspartate aminotransferase (AST) 0-50\*IU/L, direct bilirubin 0-3.4\* micromoles/L (µmol/L), bilirubin 5-21\*µmol/L, calcium 2.2-2.65\* millimoles/L (mmol/L), cholesterol 0-5.19\* mmol/L, creatinine 59-104\* µmol/L, C-reactive protein (CRP) 0-5\*milligram (mg)/L,Gamma Glutamyl Transferase (GGT) 4.1-5.9\*mmol/L, high density lipoproteins (HDL) cholesterol 0.99-2.32\*mmol/L, potassium 3.5-5.1\*mmol/L, low density lipoproteins (LDL) cholesterol 0-3.3\*mmol/L, protein 66-83\*g/L, sodium 136-146 \* mmol/L, triglycerides 0-2.25 \* mmol/L, glucose 4.1-5.9\*mmol/L, and urea 2.8-7.2\*mmol/L. Values below these ranges were considered as low and above these ranges were considered as high. Data for participants from any visit post-screening with values \> reference range high and \< reference range low are reported.

Urinalysis included microscopic examination parameters like Casts, REC, SEC, Urine erythrocytes and Urine leukocytes. Data at indicated time points were reported. Only those participants with data available at the specified data points were analyzed (represented by n=X in category titles). NA indicates standard deviation could not be calculated as only 1 participant was analyzed at the given time point.

Urinalysis included parameters like ketones and urine glucose. Data at indicated time points were reported.

Urinalysis included parameter like Occult blood. Data at indicated time points were reported.

Urinalysis included parameter like Urine protein. Data at indicated time points were reported.

Urinalysis included parameter like specific gravity. Urinary specific gravity is a measure of the concentration of solutes in the urine. It measures the ratio of urine density compared with water density and provides information on the kidney's ability to concentrate urine.

Urinalysis parameters included urine pH. pH is calculated on a scale of 0 to 14, values on the scale refer to the degree of alkalinity or acidity. A pH of 7 is neutral. A pH less than 7 is acidic, and a pH greater than 7 is basic. Normal urine has a slightly acid pH (5.0 - 6.0).

Single measurements of 12-lead ECGs were obtained after 10 minutes of rest in a semi-supine position for the participant. Participants with abnormal ECG findings that are clinically not significant (NCS) and clinically significant (CS) data has been presented here. The data of worst case post-Baseline is presented here.

Blood samples were collected at indicated time points. The Pharmacokinetic (PK) parameters were calculated for each participant using a non-compartmental method. All participants for whom, at least, one valid and evaluable pharmacokinetic parameter (AUC or Cmax) was derived were included in PK Parameter Population. Only those participants with data available at the specified data points were analyzed.

Blood samples were collected at indicated time points. The PK parameters were calculated for each participant using a non-compartmental method. Only those participants with data available at the specified data points were analyzed.

Blood samples were collected at indicated time points. The PK parameters were calculated for each participant using a non-compartmental method. AUC (0-t) was used interchangeably with AUC to last time of quantifiable concentration (AUC\[0-last\]) .Only those participants with data available at the specified data points were analyzed.

Blood samples were collected at indicated time points for the assessment of IL-6. Baseline (Day 1) was taken as the mean of the planned pre-dose measurements. Change from Baseline was defined as difference between the post-Baseline visit value and the Baseline value. Percentage fold change equals to 100\*change from Baseline divided by Baseline. All participants in the "All Subjects Population" for whom valid and evaluable pharmacodynamic parameters were derived are included in Pharmacodynamic (PD) Population. Data from multiplex immunoassay has been reported.

Blood samples were collected at indicated time points for the assessment of TNF-alpha. Baseline (Day 1) was taken as the mean of the planned pre-dose measurements. Change from Baseline was defined as difference between the post-Baseline visit value and the Baseline value. Percentage fold change equals to 100\*change from Baseline divided by Baseline. Data from multiplex immunoassay has been reported. Only those participants with data available at the specified data points were analyzed (represented by n=X in category titles).

Blood samples were collected at indicated time points for the assessment of IFN-gamma. Baseline (Day 1) was taken as the mean of the planned pre-dose measurements. Change from Baseline was defined as difference between the post-Baseline visit value and the Baseline value. Percentage fold change equals to 100\*change from Baseline divided by Baseline. Data from multiplex immunoassay has been reported. Only those participants with data available at the specified data points were analyzed (represented by n=X in category titles).

Blood samples were collected at indicated time points for the assessment of IP-10. Baseline (Day 1) was taken as the mean of the planned pre-dose measurements. Change from Baseline was defined as difference between the post-Baseline visit value and the Baseline value. Percentage fold change equals to 100\*change from Baseline divided by Baseline.

Blood samples were collected at indicated time points for the assessment of MCP-1. Baseline (Day 1) was taken as the mean of the planned pre-dose measurements. Change from Baseline was defined as difference between the post-Baseline visit value and the Baseline value. Percentage fold change equals to 100\*change from Baseline divided by Baseline.

Blood samples were collected at indicated time points for the assessment of GCSF. Baseline was taken as the mean of the planned pre-dose measurements. Change from Baseline was defined as difference between the post-Baseline visit value and the Baseline value. Percentage fold change equals to 100\*change from Baseline divided by Baseline.

Blood samples were collected at indicated time points for the assessment of IL-1Ra. Baseline was taken as the mean of the planned pre-dose measurements. Change from Baseline was defined as difference between the post-Baseline visit value and the Baseline value. Percentage fold change equals to 100\*change from Baseline divided by Baseline.

Blood samples were collected at indicated time points for the assessment of IL-10. Baseline was taken as the mean of the planned pre-dose measurements. Change from Baseline was defined as difference between the post-Baseline visit value and the Baseline value. Percentage fold change equals to 100\*change from Baseline divided by Baseline.

WBC differential included Lymphocytes Count, Monocytes Count, Granulocytes Count including neutrophils and eosinophil. Baseline (Day 1) was taken as the mean of the planned pre-dose measurements. Change from Baseline was defined as difference between the post-Baseline visit value and the Baseline value. Only those participants with data available at the specified data points were analyzed (represented by n=X in category titles).

Blood samples were collected at indicated time points for the assessment of CRP. Baseline was taken as the mean of the planned pre-dose measurements. Change from Baseline was defined as difference between the post-Baseline visit value and the Baseline value.

Cmax assessment was planned for Part 2 after IV dose administration to healthy participants 1 or 2 Weeks after the first dose. The data for Part 2 of the study was not collected as the study was discontinued by the Sponsor prior to its scheduled start due to participant in Part 1 experienced the late occurrence of Adverse events (AEs) of unknown etiology.

Tmax and t1/2 assessments were planned for Part 2 after IV dose administration to healthy participants 1 or 2 Weeks after the first dose. The data for Part 2 of the study was not collected as the study was discontinued by the Sponsor prior to its scheduled start due to participant in Part 1 experienced the late occurrence of AEs of unknown etiology.

AUC (0-t) and AUC (0-inf) assessments were planned for Part 2 after IV dose administration to healthy participants 1 or 2 Weeks after the first dose. The data for Part 2 of the study was not collected as the study was discontinued by the Sponsor prior to its scheduled start due to participant in Part 1 experienced the late occurrence of AEs of unknown etiology.

AUC (0-tau) and AUC (0-last) assessments were planned for Part 2 after IV dose administration to healthy participants 1 or 2 Weeks after the first dose. The data for Part 2 of the study was not collected as the study was discontinued by the Sponsor prior to its scheduled start due to participant in Part 1 experienced the late occurrence of AEs of unknown etiology.

CL assessment was planned for Part 2 after IV dose administration to healthy participants 1 or 2 Weeks after the first dose. The data for Part 2 of the study was not collected as the study was discontinued by the Sponsor prior to its scheduled start due to participant in Part 1 experienced the late occurrence of AEs of unknown etiology.

Volume of distribution assessment was planned for Part 2 after IV dose administration to healthy participants 1 or 2 Weeks after the first dose. The data for Part 2 of the study was not collected as the study was discontinued by the Sponsor prior to its scheduled start due to participant in Part 1 experienced the late occurrence of AEs of unknown etiology.

Accumulation ratio assessment was planned for Part 2 after IV dose administration to healthy participants 1 or 2 Weeks after the first dose. The data for Part 2 of the study was not collected as the study was discontinued by the Sponsor prior to its scheduled start due to participant in Part 1 experienced the late occurrence of AEs of unknown etiology.

Time invariance assessment was planned for Part 2 after IV dose administration to healthy participants 1 or 2 Weeks after the first dose. The data for Part 2 of the study was not collected as the study was discontinued by the Sponsor prior to its scheduled start due to participant in Part 1 experienced the late occurrence of AEs of unknown etiology.

IL-6 assessment was planned for Part 2 after IV dose administration to healthy participants 1 or 2 Weeks after the first dose. The data for Part 2 of the study was not collected as the study was discontinued by the Sponsor prior to its scheduled start due to participant in Part 1 experienced the late occurrence of AEs of unknown etiology.

TNF-alpha assessment was planned for Part 2 after IV dose administration to healthy participants 1 or 2 Weeks after the first dose. The data for Part 2 of the study was not collected as the study was discontinued by the Sponsor prior to its scheduled start due to participant in Part 1 experienced the late occurrence of AEs of unknown etiology.

IFN-gamma assessment was planned for Part 2 after IV dose administration to healthy participants 1 or 2 Weeks after the first dose. The data for Part 2 of the study was not collected as the study was discontinued by the Sponsor prior to its scheduled start due to participant in Part 1 experienced the late occurrence of AEs of unknown etiology.

IP-10 assessment was planned for Part 2 after IV dose administration to healthy participants 1 or 2 Weeks after the first dose. The data for Part 2 of the study was not collected as the study was discontinued by the Sponsor prior to its scheduled start due to participant in Part 1 experienced the late occurrence of AEs of unknown etiology.

MCP-1 assessment was planned for Part 2 after IV dose administration to healthy participants 1 or 2 Weeks after the first dose. The data for Part 2 of the study was not collected as the study was discontinued by the Sponsor prior to its scheduled start due to participant in Part 1 experienced the late occurrence of AEs of unknown etiology.

GCSF assessment was planned for Part 2 after IV dose administration to healthy participants 1 or 2 Weeks after the first dose. The data for Part 2 of the study was not collected as the study was discontinued by the Sponsor prior to its scheduled start due to participant in Part 1 experienced the late occurrence of AEs of unknown etiology.

IL-1Ra assessment was planned for Part 2 after IV dose administration to healthy participants 1 or 2 Weeks after the first dose. The data for Part 2 of the study was not collected as the study was discontinued by the Sponsor prior to its scheduled start due to participant in Part 1 experienced the late occurrence of AEs of unknown etiology.

IL-10 assessment was planned for Part 2 after IV dose administration to healthy participants 1 or 2 Weeks after the first dose. The data for Part 2 of the study was not collected as the study was discontinued by the Sponsor prior to its scheduled start due to participant in Part 1 experienced the late occurrence of AEs of unknown etiology.

WBC differential assessment was planned for Part 2 after IV dose administration to healthy participants 1 or 2 Weeks after the first dose. The data for Part 2 of the study was not collected as the study was discontinued by the Sponsor prior to its scheduled start due to participant in Part 1 experienced the late occurrence of AEs of unknown etiology.

Urinalysis as part of safety assessment was planned for Part 2 after IV dose administration to healthy participants 1 or 2 Weeks after the first dose. The data for Part 2 of the study was not collected as the study was discontinued by the Sponsor prior to its scheduled start due to participant in Part 1 experienced the late occurrence of AEs of unknown etiology.

Hematology as part of safety assessment was planned for Part 2 after IV dose administration to healthy participants 1 or 2 Weeks after the first dose. The data for Part 2 of the study was not collected as the study was discontinued by the Sponsor prior to its scheduled start due to participant in Part 1 experienced the late occurrence of AEs of unknown etiology.

Clinical chemistry as part of safety assessment was planned for Part 2 after IV dose administration to healthy participants 1 or 2 Weeks after the first dose. The data for Part 2 of the study was not collected as the study was discontinued by the Sponsor prior to its scheduled start due to participant in Part 1 experienced the late occurrence of AEs of unknown etiology.

CRP assessment was planned for Part 2 after IV dose administration to healthy participants 1 or 2 Weeks after the first dose. The data for Part 2 of the study was not collected as the study was discontinued by the Sponsor prior to its scheduled start due to participant in Part 1 experienced the late occurrence of AEs of unknown etiology.

Body temperature was planned to be measured in Part 2 after IV dose administration to healthy participants 1 or 2 Weeks after the first dose. The data for Part 2 of the study was not collected as the study was discontinued by the Sponsor prior to its scheduled start due to participant in Part 1 experienced the late occurrence of AEs of unknown etiology.

SBP and DBP was planned to be measured in Part 2 after IV dose administration to healthy participants 1 or 2 Weeks after the first dose. The data for Part 2 of the study was not collected as the study was discontinued by the Sponsor prior to its scheduled start due to participant in Part 1 experienced the late occurrence of AEs of unknown etiology.

Respiratory rate was planned to be measured in Part 2 after IV dose administration to healthy participants 1 or 2 Weeks after the first dose. The data for Part 2 of the study was not collected as the study was discontinued by the Sponsor prior to its scheduled start due to participant in Part 1 experienced the late occurrence of AEs of unknown etiology.

Pulse rate was planned to be measured in Part 2 after IV dose administration to healthy participants 1 or 2 Weeks after the first dose. Baseline (Day 1) was taken as the mean of the planned pre-dose measurements. Change from Baseline was defined as difference between the post-Baseline visit value and the Baseline value. The data for Part 2 of the study was not collected as the study was discontinued by the Sponsor prior to its scheduled start due to participant in Part 1 experienced the late occurrence of AEs of unknown etiology.

GlaxoSmithKline

Non-serious AEs and SAE for All Subjects Population in Part 1 was reported. Non-serious AEs and SAE data was not collected for Part 2 as none of the participants were enrolled into Part 2 of the study.

Participants in Part 1 were randomized to receive IV matching Placebo of GSK1795091. Participants were observed inpatient until discharge on Day 5.

Part 1: Placebo

In Part one sequential group evaluation, participants were randomized to receive single IV dose of GSK1795091 7 ng. Participants were observed inpatient until discharge on Day 5.

Part 1: GSK1795091 7 ng

In Part one sequential group evaluation, participants were randomized to receive single IV dose of GSK1795091 21 ng. Participants were observed inpatient until discharge on Day 5.

Part 1: GSK1795091 21 ng

In Part one sequential group evaluation, participants were randomized to receive single IV dose of GSK1795091 60 ng. Participants were observed inpatient until discharge on Day 5.

Part 1: GSK1795091 60 ng

In Part one sequential group evaluation, participants were randomized to receive single IV repeat dose of GSK1795091 60 ng as the study was restarted. Participants were observed inpatient until discharge on Day 5.

Part 1: GSK1795091 Repeated 60 ng

In Part one sequential group evaluation, participants were randomized to receive single IV dose of GSK1795091 100 ng. Participants were observed inpatient until discharge on Day 5.

Part 1: GSK1795091 100 ng

In part 2, two doses GSK1795091 determined by results from Part 1 were planned in parallel group evaluation. Part 2 was discontinued by the Sponsor prior to its scheduled start and no participants were enrolled.

All Participants in Part 2

Participants in Part 1 were randomized to receive intravenous (IV) matching Placebo of GSK1795091. Participants were observed inpatient until discharge on Day 5.

In Part one sequential group evaluation, participants were randomized to receive single IV dose of GSK1795091 7 nanogram (ng). Participants were observed inpatient until discharge on Day 5.

Total

Age, Continuous

Sex: Female, Male

Row 2

Race/Ethnicity, Customized

Part 2 was discontinued by the Sponsor prior to its scheduled start.

GSK Response Center

Any SAE

Non-SAE (>= 5%)

Number of Participants With Non-serious Adverse Events (AE) and Serious Adverse Events (SAE)

Day 1, 1 hour

Day 1, 2 hour

Day 1, 4 hour

Day 1, 6 hour

Day 1, 8 hour

Day 1, 12 hour

Day 1, 16 hour

Spots Global Cancer Trial Database for A Phase I, 2-part (Part 1 Being a Single Dose Escalation and Part 2, a Parallel Group) Study of Toll-like Receptor (TLR4) Agonist (GSK1795091) in Healthy Subjects

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Conditions

Interventions

Study Description

Keywords

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