Single Doses of GSK3008348 in Idiopathic Pulmonary Fibrosis (IPF) Participants Using Positron Emission Tomography (PET) Imaging

Study Overview
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Brief Summary
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GSK3008348 is being developed as a treatment for IPF. A first-time-in-human study showed that single nebulized doses of 1-3000 micrograms (mcg) GSK3008348 in healthy volunteers were well tolerated, with pharmacokinetic (PK) exposures within the defined limits set in the protocol. The proposed study is a 2-cohort study of single doses, intended to evaluate the safety, tolerability and PK of the drug in participants with IPF not currently treated with pirfenidone or nintedanib, and to obtain preliminary information on target engagement. Cohort 1 will be a 2-period, randomized, double-blind, placebo-controlled group with at least 7 days washout between doses, and follow-up period of up to 7-14 days. Cohort 2 is optional. It will be designed to further explore safety and to provide additional information on the target engagement profile of GSK3008348. The total duration of the study will be up to 62 days.

Official Title
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A Study of Single Doses to Evaluate the Safety, Tolerability, Pharmacokinetics and Target Engagement of Nebulised GSK3008348 in Idiopathic Pulmonary Fibrosis Patients, Using Positron Emission Tomography (PET) Imaging

Conditions
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Idiopathic Pulmonary Fibrosis

Intervention / Treatment
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* Drug: GSK3008348
* Drug: Placebo
* Drug: [18F]-FBA-A20FMDV2


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Male participants aged >= 50 years, and female participants aged >=55 years, at the time of signing the informed consent. Diagnosis of definite or probable IPF as determined by a responsible and experienced chest physician and based on established criteria defined by the American Thoracic Society/European Respiratory Society Internationale Multidisciplinary Consensus Classification of the Idiopathic Interstitial Pneumonias. Ambulant and capable of attending outpatient visits. FVC > 50 percent predicted and DLCO > 40 percent predicted. Body weight >= 45 kilograms (kg) and body mass index (BMI) within the range 18.0-35.0 kg/square meter (inclusive). Male and female Male participants: A male participant must agree to use contraception as detailed in this protocol during the study and for at least 90 days after the follow up visit, and refrain from donating sperm during this period. Female participants: A female participant is eligible to participate if she is not pregnant, not breastfeeding, and not a woman of childbearing potential (WOCBP) as defined in the protocol. Capable of giving signed informed consent, which includes compliance with the requirements and restrictions, listed in the informed consent form (ICF) and in this protocol. Exclusion Criteria: ALT and bilirubin > 1.5x upper limit of normal (ULN; isolated bilirubin > 1.5xULN is acceptable if bilirubin is fractionated and direct bilirubin < 35 percent). Current or chronic history of liver disease, or known hepatic or biliary abnormalities (with the exception of Gilbert's syndrome or asymptomatic gallstones). QT corrected (QTc) > 450 milliseconds (msec), or QTc > 480 msec in participants with Bundle Branch Block. Current IPF exacerbation, or upper or lower respiratory tract infection on admission to the clinical unit. History of or suffers from claustrophobia, or unable to lie flat and still on their back for up to 2 hrs in the PET scanner. Extent of emphysema greater than the extent of fibrotic change on High-Resolution Computed Tomography (HRCT) scan, based on investigator judgment. FEV1/FVC ratio < 0.70 at screening (post-bronchodilator). History of sensitivity to the study treatment, or components thereof, or a history of drug or other allergy that, in the opinion of the investigators or Medical Monitor, contraindicates their participation. Any current oro-pharygneal disease or disorders as judged by the investigator. Currently taking pirfenidone or nintedanib, or received pirfenidone or nintedanib within 30 days of the first dose of study treatment. Taken, within 7 days or 5 half-lives (whichever is longer) before the first dose of study treatment, organic anion transporter (OAT) substrates with a narrow therapeutic index (example: methotrexate and tenofovir), vitamins, or dietary or herbal supplements, unless in the opinion of the investigator and sponsor the supplement will not interfere with the study medication. Long-term continuous home oxygen therapy (use of oxygen that is only intermittent and for symptom relief is acceptable). Participation in a clinical trial and receipt of an investigational medicinal product within the following time period before the first dose in the current study: 30 days, 5 half-lives or twice the duration of the biological effect of the investigational product (whichever is longer). Exposure to more than 4 new investigational medicinal products within 12 months before the first dose. Presence of Hepatitis B surface antigen (HBsAg) at screening, or positive Hepatitis C antibody test result at screening or within 3 months before the first dose of study treatment. Note: participants with a positive Hepatitis C antibody test because of previous, resolved disease can be enrolled if a confirmatory negative Hepatitis C Ribonucleic Acid (RNA) test is obtained. Previous or current exposure to animals that may harbour Food and Mouth Disease Virus (FMDV2). Previous long term (>= 3 months) residence in a country where FMDV2 is endemic (such as certain areas of Africa, Asia and South America. Where participation in the study would result in loss of blood or blood products in excess of 500 milliliter (mL) within 56 days. History of drug or alcohol abuse that in the opinion of the investigator affects their participation in the study. Exposure to ionizing radiation in excess of 10 Millisievert (mSv) above background over the previous 3 year period as a result of occupational exposure or previous participation in research studies. Clinically justified (therapeutic or diagnostic) exposures are not included in the exposure calculation.

Ages Eligible for Study
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Minimum Age: 50 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Cohort 1 GSK3008348<br>Participants will receive a single nebulized dose of GSK3008348 during each of 2 planned dosing periods and up to 3 microdose administrations of [18F]-FBA-A20FMDV2 for the PET scanning in period 2. | Drug: GSK3008348<br>* Solution for nebulisation. Available as clear colorless to pale yellow colored solution in a 5mL vial with 20 millimeter (mm) stopper and aluminium seal yellow colored solution in a 5mL vial with 20 millimeter (mm) stopper and aluminium seal.<br>Drug: [18F]-FBA-A20FMDV2<br>* Radio-labeled peptide ligand for PET scan. Available as intravenous (IV) infusion, 20 mL.<br>|
| Placebo Comparator: Cohort 1 Placebo<br>Participants will receive a single nebulized dose of placebo during each of 2 planned dosing periods and up to 3 microdose of [18F]-FBA-A20FMDV2 for the PET scanning in period 2. | Drug: Placebo<br>* Solution for nebulisation. Available as clear colorless to pale yellow colored solution in a 5mL vial with 20mm stopper and aluminium seal.<br>Drug: [18F]-FBA-A20FMDV2<br>* Radio-labeled peptide ligand for PET scan. Available as intravenous (IV) infusion, 20 mL.<br>|
| Experimental: Cohort 2 GSK3008348<br>Participants will receive a single nebulized dose of GSK3008348 during each of 2 planned dosing periods and up to 3 microdose administrations of [18F]-FBA-A20FMDV2 for the PET scanning in period 2. | Drug: GSK3008348<br>* Solution for nebulisation. Available as clear colorless to pale yellow colored solution in a 5mL vial with 20 millimeter (mm) stopper and aluminium seal yellow colored solution in a 5mL vial with 20 millimeter (mm) stopper and aluminium seal.<br>Drug: [18F]-FBA-A20FMDV2<br>* Radio-labeled peptide ligand for PET scan. Available as intravenous (IV) infusion, 20 mL.<br>|
| Placebo Comparator: Cohort 2 Placebo<br>Participants will receive a single nebulized dose of placebo during each of 2 planned dosing periods and up to 3 microdose of [18F]-FBA-A20FMDV2 for the PET scanning in period 2. | Drug: Placebo<br>* Solution for nebulisation. Available as clear colorless to pale yellow colored solution in a 5mL vial with 20mm stopper and aluminium seal.<br>Drug: [18F]-FBA-A20FMDV2<br>* Radio-labeled peptide ligand for PET scan. Available as intravenous (IV) infusion, 20 mL.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Period 2: Volume of Distribution (VT) of [18F]-FBA-A20FMDV2 in the Whole Lung (Not Corrected for Air Volume) at 30 Minutes Post-dose Compared to Pre-dose | The change in the uptake of [18F]-FBA-A20FMDV2 in the whole lung, assessed by VT derived from kinetic analysis of the dynamic PET data, was used to evaluate target engagement in the lung after single nebulized doses of GSK3008348. The per-Protocol population consisted of all participants in the Intent-to-Treat population who comply with the protocol and that had at least one evaluable PET measurement post-dose. | Baseline (pre-dose) and 30 minutes post-dose | 
| Number of Participants With Adverse Events (AEs) and Serious Adverse Events (SAEs) | An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of a study treatment, whether or not considered related to the study treatment. 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, is a congenital anomaly/birth defect, other situations judged by physician. Intent-to-Treat population consisted of all randomized participants who received at least one dose of study treatment. | Up to 62 days | 
| Period 1: Change From Baseline in Hematology Parameters: Basophils, Eosinophils, Lymphocytes, Monocytes, Total Neutrophils, Platelet Count and White Blood Cell (WBC) Count | Blood samples were collected to analyze the hematology parameters: basophils, eosinophils, lymphocytes, monocytes, total neutrophils, platelet count, platelet count and WBC count. Baseline was considered as the latest pre-dose assessment with a non-missing value for Baseline (Day -1). Change from Baseline was calculated as post-Baseline value minus Baseline value. | Baseline (Day -1) and 24 hours post-GSK3008348 dose | 
| Period 2: Change From Baseline in Hematology Parameters: Basophils, Eosinophils, Lymphocytes, Monocytes, Total Neutrophils, Platelet Count and WBC Count | Blood samples were collected to analyze the hematology parameters: basophils, eosinophils, lymphocytes, monocytes, total neutrophils, platelet count, platelet count and WBC count. Baseline was considered as the latest pre-dose assessment with a non-missing value for Baseline (Day -1). Change from Baseline was calculated as post-Baseline value minus Baseline value. | Baseline (Day -1) and 24 hours post-GSK3008348 dose | 
| Period 1: Change From Baseline in Hematology Parameter: Hemoglobin | Blood samples were collected to analyze the hematology parameter: hemoglobin. Baseline was considered as the latest pre-dose assessment with a non-missing value for Baseline (Day -1). Change from Baseline was calculated as post-Baseline value minus Baseline value. | Baseline (Day -1) and 24 hours post-GSK3008348 dose | 
| Period 2: Change From Baseline in Hematology Parameter: Hemoglobin | Blood samples were collected to analyze the hematology parameter: hemoglobin. Baseline was considered as the latest pre-dose assessment with a non-missing value for Baseline (Day -1). Change from Baseline was calculated as post-Baseline value minus Baseline value. | Baseline (Day -1) and 24 hours post-GSK3008348 dose | 
| Period 1: Change From Baseline in Hematology Parameter: Hematocrit | Blood samples were collected to analyze the hematology parameter: hematocrit. Baseline was considered as the latest pre-dose assessment with a non-missing value for Baseline (Day -1). Change from Baseline was calculated as post-Baseline value minus Baseline value. | Baseline (Day -1) and 24 hours post-GSK3008348 dose | 
| Period 2: Change From Baseline in Hematology Parameter: Hematocrit | Blood samples were collected to analyze the hematology parameter: hematocrit. Baseline was considered as the latest pre-dose assessment with a non-missing value for Baseline (Day -1). Change from Baseline was calculated as post-Baseline value minus Baseline value. | Baseline (Day -1) and 24 hours post-GSK3008348 dose | 
| Period 1: Change From Baseline in Hematology Parameter: Mean Corpuscle Hemoglobin | Blood samples were collected to analyze the hematology parameter: mean corpuscle hemoglobin. Baseline was considered as the latest pre-dose assessment with a non-missing value for Baseline (Day -1). Change from Baseline was calculated as post-Baseline value minus Baseline value. | Baseline (Day -1) and 24 hours post-GSK3008348 dose | 
| Period 2: Change From Baseline in Hematology Parameter: Mean Corpuscle Hemoglobin | Blood samples were collected to analyze the hematology parameter: mean corpuscle hemoglobin. Baseline was considered as the latest pre-dose assessment with a non-missing value for Baseline (Day -1). Change from Baseline was calculated as post-Baseline value minus Baseline value. | Baseline (Day -1) and 24 hours post-GSK3008348 dose | 
| Period 1: Change From Baseline in Hematology Parameter: Mean Corpuscle Volume | Blood samples were collected to analyze the hematology parameter: mean corpuscle volume. Baseline was considered as the latest pre-dose assessment with a non-missing value for Baseline (Day -1). Change from Baseline was calculated as post-Baseline value minus Baseline value. | Baseline (Day -1) and 24 hours post-GSK3008348 dose | 
| Period 2: Change From Baseline in Hematology Parameter: Mean Corpuscle Volume | Blood samples were collected to analyze the hematology parameter: mean corpuscle volume. Baseline was considered as the latest pre-dose assessment with a non-missing value for Baseline (Day -1). Change from Baseline was calculated as post-Baseline value minus Baseline value. | Baseline (Day -1) and 24 hours post-GSK3008348 dose | 
| Period 1: Change From Baseline in Hematology Parameter: Red Blood Cell Count | Blood samples were collected to analyze the hematology parameter: red blood cell count. Baseline was considered as the latest pre-dose assessment with a non-missing value for Baseline (Day -1). Change from Baseline was calculated as post-Baseline value minus Baseline value. | Baseline (Day -1) and 24 hours post-GSK3008348 dose | 
| Period 2: Change From Baseline in Hematology Parameter: Red Blood Cell Count | Blood samples were collected to analyze the hematology parameter: red blood cell count. Baseline was considered as the latest pre-dose assessment with a non-missing value for Baseline (Day -1). Change from Baseline was calculated as post-Baseline value minus Baseline value. | Baseline (Day -1) and 24 hours post-GSK3008348 dose | 
| Period 1: Change From Baseline in Chemistry Parameters: Alkaline Phosphatase, Alanine Amino Transferase, Aspartate Amino Transferase, Creatine Kinase and Gamma Glutamyl Transferase | Blood samples were collected to analyze the chemistry parameters: alkaline phosphatase, alanine amino transferase, aspartate amino transferase, creatine kinase and gamma glutamyl transferase. Baseline was considered as the latest pre-dose assessment with a non-missing value for Baseline (Day -1). Change from Baseline was calculated as post-Baseline value minus Baseline value. | Baseline (Day -1) and 24 hours post-GSK3008348 dose | 
| Period 2: Change From Baseline in Chemistry Parameters: Alkaline Phosphatase, Alanine Amino Transferase, Aspartate Amino Transferase, Creatine Kinase and Gamma Glutamyl Transferase | Blood samples were collected to analyze the chemistry parameters: alkaline phosphatase, alanine amino transferase, aspartate amino transferase, creatine kinase and gamma glutamyl transferase. Baseline was considered as the latest pre-dose assessment with a non-missing value for Baseline (Day -1). Change from Baseline was calculated as post-Baseline value minus Baseline value. | Baseline (Day -1) and 24 hours post-GSK3008348 dose | 
| Period 1: Change From Baseline in Chemistry Parameters: Albumin and Total Protein | Blood samples were collected to analyze the chemistry parameters: albumin and total protein. Baseline was considered as the latest pre-dose assessment with a non-missing value for Baseline (Day -1). Change from Baseline was calculated as post-Baseline value minus Baseline value. | Baseline (Day -1) and 24 hours post-GSK3008348 dose | 
| Period 2: Change From Baseline in Chemistry Parameters: Albumin and Total Protein | Blood samples were collected to analyze the chemistry parameters: albumin and total protein. Baseline was considered as the latest pre-dose assessment with a non-missing value for Baseline (Day -1). Change from Baseline was calculated as post-Baseline value minus Baseline value. | Baseline (Day -1) and 24 hours post-GSK3008348 dose | 
| Period 1: Change From Baseline in Chemistry Parameters: Direct Bilirubin, Total Bilirubin and Creatinine | Blood samples were collected to analyze the chemistry parameters: direct bilirubin, total bilirubin and creatinine. Baseline was considered as the latest pre-dose assessment with a non-missing value for Baseline (Day -1). Change from Baseline was calculated as post-Baseline value minus Baseline value. | Baseline (Day -1) and 24 hours post-GSK3008348 dose | 
| Period 2: Change From Baseline in Chemistry Parameters: Direct Bilirubin, Total Bilirubin and Creatinine | Blood samples were collected to analyze the chemistry parameters: direct bilirubin, total bilirubin and creatinine. Baseline was considered as the latest pre-dose assessment with a non-missing value for Baseline (Day -1). Change from Baseline was calculated as post-Baseline value minus Baseline value. | Baseline (Day -1) and 24 hours post-GSK3008348 dose | 
| Period 1: Change From Baseline in Chemistry Parameters: Calcium, Glucose, Potassium, Sodium and Blood Urea Nitrogen | Blood samples were collected to analyze the chemistry parameters: calcium, glucose, potassium, sodium and blood urea nitrogen. Baseline was considered as the latest pre-dose assessment with a non-missing value for Baseline (Day -1). Change from Baseline was calculated as post-Baseline value minus Baseline value. | Baseline (Day -1) and 24 hours post-GSK3008348 dose | 
| Period 2: Change From Baseline in Chemistry Parameters: Calcium, Glucose, Potassium, Sodium and Blood Urea Nitrogen | Blood samples were collected to analyze the chemistry parameters: calcium, glucose, potassium, sodium and blood urea nitrogen. Baseline was considered as the latest pre-dose assessment with a non-missing value for Baseline (Day -1). Change from Baseline was calculated as post-Baseline value minus Baseline value. | Baseline (Day -1) and 24 hours post-GSK3008348 dose | 
| Period 1: Number of Participants With Abnormal Urinalysis Results by Dipstick | Urine samples were collected at indicated time points to analyze urinalysis parameters including specific gravity, potential of hydrogen, glucose, protein, blood and ketones by dipstick. The dipstick test gives results in a semi-quantitative manner, and results for urinalysis parameters can be read as positive, Trace, 1+, 2+, 3+ and 4+, indicating proportional concentrations in the urine sample. Baseline was considered as the latest pre-dose assessment with a non-missing value for Baseline (Day -1). Only categories with abnormal urinalysis values are presented. | Baseline (Day -1) and 24 hours post-GSK3008348 dose | 
| Period 2: Number of Participants With Abnormal Urinalysis Results by Dipstick | Urine samples were collected at indicated time points to analyze urinalysis parameters including specific gravity, potential of hydrogen, glucose, protein, blood and ketones by dipstick. The dipstick test gives results in a semi-quantitative manner, and results for urinalysis parameters can be read as positive, Trace, 1+, 2+, 3+ and 4+, indicating proportional concentrations in the urine sample. Baseline was considered as the latest pre-dose assessment with a non-missing value for Baseline (Day -1). Only categories with abnormal urinalysis values are presented. | Baseline (Day -1), 24 hours post-GSK3008348 dose and Day 15 (follow-up) | 
| Period 1: Change From Baseline in Vital Signs: Diastolic Blood Pressure (DBP) and Systolic Blood Pressure (SBP) | SBP and DBP were measured in semi-supine position after 5 minutes rest for the participants at indicated time points. Baseline was considered as the latest pre-dose assessment with a non-missing value for Baseline (Day -1). Change from Baseline was calculated as post-Baseline value minus Baseline value. | Baseline (Day -1), 0.5, 2, 4, 8 and 24 hours post-GSK3008348 dose | 
| Period 2: Change From Baseline in Vital Signs: DBP and SBP | SBP and DBP were measured in semi-supine position after 5 minutes rest for the participants at indicated time points. Baseline was considered as the latest pre-dose assessment with a non-missing value for Baseline (Day -1). Change from Baseline was calculated as post-Baseline value minus Baseline value. | Baseline (Day -1), 30 minutes (post-PET scan), Day 1 (prior to discharge) and Day 2 (pre-PET scan) | 
| Period 1: Change From Baseline in Vital Signs: Heart Rate | Heart rate was measured in semi-supine position after 5 minutes rest for the participants at indicated time points. Baseline was considered as the latest pre-dose assessment with a non-missing value for Baseline (Day -1). Change from Baseline was calculated as post-Baseline value minus Baseline value. | Baseline (Day -1), 0.5, 2, 4, 8 and 24 hours post-GSK3008348 dose | 
| Period 2: Change From Baseline in Vital Signs: Heart Rate | Heart rate was measured in semi-supine position after 5 minutes rest for the participants at indicated time points. Baseline was considered as the latest pre-dose assessment with a non-missing value for Baseline (Day -1). Change from Baseline was calculated as post-Baseline value minus Baseline value. | Baseline (Day -1), 30 minutes (post-PET scan), Day 1 (prior to discharge) and Day 2 (pre-PET scan) | 
| Period 1: Change From Baseline in Vital Sign: Respiration Rate | Respiration rate was measured in semi-supine position after 5 minutes rest for the participants at indicated time points. Baseline was considered as the latest pre-dose assessment with a non-missing value for Baseline (Day -1). Change from Baseline was calculated as post-Baseline value minus Baseline value. | Baseline (Day -1), 0.5, 2, 4, 8 and 24 hours post-GSK3008348 dose | 
| Period 2: Change From Baseline in Vital Sign: Respiration Rate | Respiration rate was measured in semi-supine position after 5 minutes rest for the participants at indicated time points. Baseline was considered as the latest pre-dose assessment with a non-missing value for Baseline (Day -1). Change from Baseline was calculated as post-Baseline value minus Baseline value. | Baseline (Day -1), 30 minutes (post-PET scan), Day 1 (prior to discharge) and Day 2 (pre-PET scan) | 
| Period 1: Change From Baseline in Vital Sign: Temperature | Temperature was measured in semi-supine position after 5 minutes rest for the participants at indicated time points. Baseline was considered as the latest pre-dose assessment with a non-missing value for Baseline (Day -1). Change from Baseline was calculated as post-Baseline value minus Baseline value. | Baseline (Day -1), 0.5, 2, 4, 8 and 24 hours post-GSK3008348 dose | 
| Period 2: Change From Baseline in Vital Sign: Temperature | Temperature was measured in semi-supine position after 5 minutes rest for the participants at indicated time points. Baseline was considered as the latest pre-dose assessment with a non-missing value for Baseline (Day -1). Change from Baseline was calculated as post-Baseline value minus Baseline value. | Baseline (Day -1), 30 minutes (post-PET scan), Day 1 (prior to discharge) and Day 2 (pre-PET scan) | 
| Period 1: Number of Participants With Abnormal Findings for 12-lead Electrocardiograms (ECG) Parameters | Triplicate 12-lead ECG were obtained to measure ECG parameters. Abnormal findings were categorized as clinically significant (CS) and not clinically significant (NCS). Clinically significant abnormal findings are those which are not associated with the underlying disease, unless judged by the investigator to be more severe than expected for the participant's condition. | Pre-dose (Day -1), 0.5, 2, 4, 8 and 24 hours post-GSK3008348 dose | 
| Period 2: Number of Participants With Abnormal Findings for 12-lead ECG Parameters | Triplicate 12-lead ECG were obtained to measure ECG parameters. Abnormal findings were categorized as CS and NCS. Clinically significant abnormal findings are those which are not associated with the underlying disease, unless judged by the investigator to be more severe than expected for the participant's condition. | Pre-dose (Day -1), 30 minutes (post-PET scan), Day 1 (prior to discharge), Day 2 (pre-PET scan) and Day 15 (follow-up) | 
| Period 1: Change From Baseline in Forced Expiratory Volume in 1 Second (FEV1) and Forced Vital Capacity (FVC) | FEV1 and FVC is a measure of lung function and the maximal amount of air that can be forcefully exhaled in one second. FEV1 and FVC was measured using standard spirometry equipment. Baseline was considered as the latest pre-dose assessment with a non-missing value for Baseline (Day -1). Change from Baseline was calculated as post-Baseline value minus Baseline value. | Baseline (Day -1), 1 hour and 24 hours post-GSK3008348 dose | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Period 1: Area Under the Plasma Concentration-time Curve From Zero Hours to Time (AUC[0-t]) After Single Dose Administration of GSK3008348 | Blood samples were collected to evaluate the pharmacokinetics of GSK3008348 at the indicated time points. The pharmacokinetic parameters were calculated by standard non-compartmental analysis. Pharmacokinetic population consisted of all participants in the Intent-To-Treat population receiving active dose for whom a pharmacokinetic sample was analyzed. | Pre-dose, and at 0.25, 0.5, 1, 2, 4, 8, 12, 18 and 24 hours post-GSK3008348 dose | 
| Period 2: AUC(0-t) After Single Dose Administration of GSK3008348 | Blood samples were collected to evaluate the pharmacokinetics of GSK3008348 at the indicated time points. The pharmacokinetic parameters were calculated by standard non-compartmental analysis. | Pre-dose, and at 0.25, 0.5, 2, 4, 22 and 30 hours post-GSK3008348 dose | 
| Period 1: Area Under the Plasma Concentration-time Curve From Zero Hours to Infinity (AUC[0-infinity]) After Single Dose Administration of GSK3008348 | Blood samples were collected to evaluate the pharmacokinetics of GSK3008348 at the indicated time points. The pharmacokinetic parameters were calculated by standard non-compartmental analysis. | Pre-dose, and at 0.25, 0.5, 1, 2, 4, 8, 12, 18 and 24 hours post-GSK3008348 dose | 
| Period 2: AUC(0-infinity) After Single Dose Administration of GSK3008348 | Blood samples were collected to evaluate the pharmacokinetics of GSK3008348 at the indicated time points. The pharmacokinetic parameters were calculated by standard non-compartmental analysis. | Pre-dose, and at 0.25, 0.5, 2, 4, 22 and 30 hours post-GSK3008348 dose | 
| Period 1: Maximum Observed Plasma Drug Concentration (Cmax) After Single Dose Administration of GSK3008348 | Blood samples were collected to evaluate the pharmacokinetics of GSK3008348 at the indicated time points. The pharmacokinetic parameters were calculated by standard non-compartmental analysis. | Pre-dose, and at 0.25, 0.5, 1, 2, 4, 8, 12, 18 and 24 hours post-GSK3008348 dose | 
| Period 2: Cmax After Single Dose Administration of GSK3008348 | Blood samples were collected to evaluate the pharmacokinetics of GSK3008348 at the indicated time points. The pharmacokinetic parameters were calculated by standard non-compartmental analysis. | Pre-dose, and at 0.25, 0.5, 2, 4, 22 and 30 hours post-GSK3008348 dose | 
| Period 1: Time of Occurrence of Cmax (Tmax) After Single Dose Administration of GSK3008348 | Blood samples were collected to evaluate the pharmacokinetics of GSK3008348 at the indicated time points. The pharmacokinetic parameters were calculated by standard non-compartmental analysis. | Pre-dose, and at 0.25, 0.5, 1, 2, 4, 8, 12, 18 and 24 hours post-GSK3008348 dose | 
| Period 2: Tmax After Single Dose Administration of GSK3008348 | Blood samples were collected to evaluate the pharmacokinetics of GSK3008348 at the indicated time points. The pharmacokinetic parameters were calculated by standard non-compartmental analysis. | Pre-dose, and at 0.25, 0.5, 2, 4, 22 and 30 hours post-GSK3008348 dose | 
| Period 1: Terminal Phase Half-life (t1/2) After Single Dose Administration of GSK3008348 | Blood samples were collected to evaluate the pharmacokinetics of GSK3008348 at the indicated time points. The pharmacokinetic parameters were calculated by standard non-compartmental analysis. | Pre-dose, and at 0.25, 0.5, 1, 2, 4, 8, 12, 18 and 24 hours post-GSK3008348 dose | 
| Period 2: t1/2 After Single Dose Administration of GSK3008348 | Blood samples were collected to evaluate the pharmacokinetics of GSK3008348 at the indicated time points. The pharmacokinetic parameters were calculated by standard non-compartmental analysis. | Pre-dose, and at 0.25, 0.5, 2, 4, 22 and 30 hours post-GSK3008348 dose | 
| Period 2: VT of [18F]-FBAA20FMDV2 in the Whole Lung (Not Corrected for Air Volume) Approximately 24 Hours Post-dose Compared to Pre-dose | The changes in the uptake of [18F]-FBA-A20FMDV2 in the whole lung, assessed by VT derived from kinetic analysis of the dynamic PET data was used to evaluate target engagement in the lung after single nebulized doses of GSK3008348 | Baseline (pre-dose) and 24 hours post-dose PET scan 2 | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Tolerability, IPF, PET imaging, Idiopathic Pulmonary Fibrosis, Safety, Pharmacokinetics, Double-blind