Saline-induced sputum samples were collected at the indicated time-points to determine the alterations in previously identified immune cell mechanisms specifically related to neutrophil function by identifying the changes in mRNA transcriptome in induced sputum. Baseline was defined as screening visit. The log2 transformed mRNA intensities for each probe set were analyzed in a separate repeated measures model. Back transformed baseline-adjusted ratios and two-sided unadjusted p-values were calculated for each visit as the specified time-point value/baseline value. These ratios were converted to fold change values; if ratio \>= 1 then fold change=ratio or if ratio \< 1 then fold change = -1/ratio. Data for pre-specified probe sets that meet the criteria fold change \>1.5 or \<-1.5 and p\<0.05 for All NEMI, All Placebo and All NEMI/All Placebo group is presented in outcome measure 1, 2 and 3 respectively. In the categories column we have included time-point, Probe ID and Gene label.

Saline-induced sputum samples were collected at the indicated time-points to determine the alterations in previously identified immune cell mechanisms specifically related to neutrophil function by identifying the changes in mRNA transcriptome in induced sputum. Baseline was defined as screening visit. The log2 transformed mRNA intensities for each probe set were analysed in a separate repeated measures model. Back transformed baseline-adjusted ratios and two-sided unadjusted p-values were calculated for each visit as the specified time-point value/baseline value. These ratios were converted to fold change values; if ratio \>= 1 then fold change=ratio or if ratio \< 1 then fold change = -1/ratio. Data for pre-specified probe sets that meet the criteria fold change \>1.5 or \<-1.5 and p\<0.05 for All NEMI, All Placebo and All NEMI/All Placebo group is presented in outcome measure 1, 2 and 3 respectively. In the categories column we have included time-point, Probe ID and Gene label.

Saline-induced sputum samples were collected at the indicated time-points to determine the alterations in previously identified immune cell mechanisms specifically related to neutrophil function by identifying the changes in mRNA transcriptome in induced sputum. For each probe set, the log2 transformed mRNA intensities were analyzed in separate repeated measures models. The models included a Treatment, Visit and Treatment\*Visit term. The Visit consisted of 4 levels: Screening (Baseline), Day 12, Day 28 and Day 84, and the Treatment consisted of three levels: Null (when Visit = Screening), All Placebo and All NEMI. The fold changes were derived from the back transformed ratio from Baselines as fold change = ratio if ratio is \>=1, else if ratio \<1 then fold change = -1/ratio. Data for pre-specified probe sets that meet the criteria fold change \>1.5 and p\<0.05 for All NEMI, All Placebo and All NEMI/All Placebo group is presented in outcome measure 1, 2 and 3 respectively.

siVaw is a measure of the volume in an individual's airway corrected for their lobar volume derived from the high resolution computed tomography (HRCT). It was measured at functional residual volume (FRC) and total lung capacity (TLC). Data was collected at longitudinal time points: Screening, Day 12 \& Day 28 and at each time point for scan trimmed pairs: SCRD12, SCRD28 \& D12D28. At each time point it was measure at 5 lobes (RUL, LUL, RML, RLL \& LLL) and 5 Regions (Upper, Lower, Central, Distal \& Total). For longitudinal time points and SCRD12 \& SCRD28 scan trimmed pairs the baseline is screening, for D12D28 scan trimmed pair the baseline is D12. Change from baseline is the post-Baseline value minus the Baseline value. Only particpants available at the specified time point were analysed (represented by n=X1, X2 in the category title).

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 \>=3 x upper limit of normal (ULN), and total bilirubin \>=2 x ULN or international normalized ratio \>1.5. AEs were classified as potentially drug-related, based on the investigator's judgment. Refer to the general AE/SAE module for a list of AEs and SAEs.

Blood samples were collected for measurement for the indicated tests. Baseline is Day 1 pre-dose. Change from Baseline at any post-dose visit was calculated as the post-dose visit value minus the Baseline value. Day 7 assessments could be conducted on Day 7 or Day 8.

Blood samples were collected for measurement for the indicated tests. Baseline is Day 1 pre-dose. MCHC is one of the red blood cell (RBC) indices. Change from Baseline at any post-dose visit was calculated as the post-dose visit value minus the Baseline value. Day 7 assessments could be conducted on Day 7 or Day 8.

Blood samples were collected for measurement for the indicated tests. Baseline is Day 1 pre-dose. Change from Baseline at any post-dose visit was calculated as the post-dose visit value minus the Baseline value. Day 7 assessments could be conducted on Day 7 or Day 8.

Blood samples were collected for measurement for the indicated tests. Baseline is Day 1 pre-dose. Change from Baseline at any post-dose visit was calculated as the post-dose visit value minus the Baseline value. Day 7 assessments could be conducted on Day 7 or Day 8.

Blood samples were collected for measurement for the indicated tests. Baseline is Day 1 pre-dose. MCH is one of the red blood cell indices. Change from Baseline at any post-dose visit was calculated as the post-dose visit value minus the Baseline value. Day 7 assessments could be conducted on Day 7 or Day 8.

Blood samples were collected for measurement for the indicated tests. Baseline is Day 1 pre-dose. MCV is one of the RBC indices. Change from Baseline at any post-dose visit was calculated as the post-dose visit value minus the Baseline value. Day 7 assessments could be conducted on Day 7 or Day 8.

Blood samples were collected for measurement for the indicated tests. Baseline is Day 1 pre-dose. Change from Baseline at any post-dose visit was calculated as the post-dose visit value minus the Baseline value. Day 7 assessments could be conducted on Day 7 or Day 8.

Blood samples were collected for measurement for the indicated tests. Baseline is Day 1 pre-dose. Change from Baseline at any post-dose visit was calculated as the post-dose visit value minus the Baseline value. Day 7 assessments could be conducted on Day 7 or Day 8.

Blood samples were collected for measurement for the indicated tests. Baseline is Day 1 pre-dose. Change from Baseline at any post-dose visit was calculated as the post-dose visit value minus the Baseline value. Day 7 assessments could be conducted on Day 7 or Day 8.

Blood samples were collected for measurement for the indicated tests. Baseline is Day 1 pre-dose. Change from Baseline at any post-dose visit was calculated as the post-dose visit value minus the Baseline value. Day 7 assessments could be conducted on Day 7 or Day 8.

Baseline was the Day 1 pre-dose measurement. Vital signs (SBP, DBP, and HR) were measured at Day 1 (30 minutes \[min\] and 6 h post-dose), Day 7 (pre-dose), and Day 14 (24 h post-dose). Potential clinical concern range for SBP was \<85 millimeters of mercury (mmHg) (low) and \>160 mmHg (high), for DBP \<45 mmHg (low) and \>100 mmHg (high) and for HR \<40 bpm and \>110 bpm. All measurements were obtained in supine position, after a 5-minute rest. Day 7 assessments could be conducted on Day 7 or Day 8.

Baseline was the Day 1 (pre-dose) measurement. Single 12-lead ECGs were obtained using an ECG machine that automatically calculates the HR and measures PR, QRS, QT, and corrected QT intervals. Clinical significance was judged by the investigator. Day 7 assessments could be conducted on Day 7 or Day 8.

Baseline is Day 1 pre-dose. FEV1 and FVC are measures of lung function. FEV1 is defined as the maximal amount of air that can be forcefully exhaled in one second. FVC is defined as the maximum amount of air that can be forcibly blown out after a maximum inspiration. FEV1 and FVC measurements were repeated until three technically acceptable measurements (within 150 milliliters of each other) had been made. Only the best of three measurements were recorded. Baseline was the maximum of the planned pre-dose measurements on Day 1. Change from Baseline at any post-dose time point was calculated as the post-dose value minus the Baseline value. Day 7 assessments could be conducted on Day 7 or Day 8.

This outcome measure was used to estimate the inhibition levels of various doses of GSK2269557 by analyzing inflammatory cytokines IL6, IL8, and TNF alpha using Bayesian methods of statistical analysis, using non-informative prior distributions for all modeling parameters. Posterior medians (adjusted median response) and 95% credible intervals are reported here as medians and 95% confidence intervals respectively. 95% credible interval is reported as 2-sided 95% confidence in the statistical analyses. Day 7 assessments could be conducted on Day 7 or Day 8.

Blood pressure measurement will include systolic and diastolic blood pressure measured after resting in the supine position for 5 minutes

Pulse rate measurement should be done after resting in the supine position for 5 minutes

Pulse rate measurement should be done after resting in the supine position for 5 minutes

Pulse rate measurement should be done after resting in the supine position for 5 minutes

Pulmonary function test measured from forced expiratory volume in 1 second (FEV1). Pulmonary function test will be repeated until three technically acceptable measurements have been made.

Pulmonary function test measured from FEV1. Pulmonary function test will be repeated until three technically acceptable measurements have been made.

12-lead ECGs will be obtained using an ECG machine that automatically calculates the heart rate and measures PR, QRS, QT, and QT duration corrected for heart rate by Bazett's formula (QTcB)/ QT duration corrected for heart rate by Fridericia's formula (QTcF) intervals. ECGs will be measured after resting in supine position for 5 minutes

12-lead ECGs will be obtained using an ECG machine that automatically calculates the heart rate and measures PR, QRS, QT, and QTcB/QTcF intervals. ECGs will be measured after resting in supine position for 5 minutes

Clinical laboratory test includes hematology, clinical chemistry, urinalysis and additional parameters

Clinical laboratory test includes hematology, clinical chemistry, urinalysis and additional parameters

AEs will be collected from the start of study treatment and until the follow-up contact

AEs will be collected from the start of study treatment and until the follow-up contact