A Dose Ranging Study to Evaluate the Safety and Efficacy of GSK2586184 in Patients With Chronic Plaque Psoriasis

An AE is defined as any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease (new or exacerbated) temporally associated with the use of a medicinal product. A 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 or incapacity, is a congenital anomaly or birth defect. Any SAEs assessed as related to study participation (e.g. study treatment, protocol-mandated procedures, invasive tests, or change in existing therapy) or related to a GSK product was recorded from the time a participant consents to participate in the study up to and including any follow-up contact.

Hematology parameters included: basophils, eosinophils, erythrocyte mean corpuscular hemoglobin (EMCHb) EMCHb concentration (EMCHbC), erythrocyte mean corpuscular volume (EMCV), erythrocyte sedimentation rate (ESR), erythrocytes, hematocrit (fraction 1), hemoglobin, leukocytes, lymphocytes, monocytes, neutrophils, segmented neutrophils, platelets, reticulocytes. BL values were obtained at Day 1. The number of participants with the indicated hematology parameters data outside of the reference range (with high and low) any time post-BL are presented. Anytime post-BL assessments included any scheduled and unscheduled post-BL assessment.

Safety and tolerability were assessed by measuring the clinical chemistry parameters such as creatinine and cystatin C. BL values were obtained at Day 1. The number of participants with the indicated hematology parameter data outside of the reference range (> high or < low) at any time post-BL, including unscheduled or scheduled assessments, are presented.

Vital sign monitoring included systolic and diastolic BP measurements. BP measurements were taken in the supine position after 5 minutes of rest. The number of participants with the SBP or DBP outside the clinical concern range at any time post-BL are presented. SBP "low" was measured as less than 85 millimeters of mercury (mmHg)and "high" was measured as greater than 160 mmHg. DBP "low" was measured as less than 45 mmHg and "high" was measured as greater than 100 mmHg. The BL values were those values obtained at Day 1. Anytime post-BL assessments included any scheduled and unscheduled post-BL assessment.

Vital sign monitoring included heart rate (HR) measurements. HR measurements were taken in supine position after 5 minutes of rest. The number of participants with HR outside the clinical concern range at any time post-BL are presented. HR "low" was any HR less than 40 beats per minute (bpm) and "high" was any HR greater than 110 bpm. The BL values were those values obtained at Day 1. Anytime post-BL assessments included any scheduled and unscheduled post-BL assessment.

Vital sign monitoring included body temperature measurements. Body temperature measurements were taken in the supine position after 5 minutes of rest. Baseline is defined as the last result on or before the day of first dose. Change from Baseline was determined by subtracting the indicated time point value minus the Baseline value.

ECG measurements were obtained using single 12-lead ECGs with the participant in a supine position after resting in this position for at least 10 minutes. The Baseline values were those values obtained Pre-dose on Day 1. The change from Baseline was the difference between post-Baseline and Baseline. The QT intervals (milliseconds [msec]) corrected for heart rate using Bazett's formula (QTcB) and Fridericia's formula (QTcF) are reported.

Psoriatic lesions were assessed using the PASI. PASI score was determined by evaluation of BSA covered by plaque psoriasis in 4 areas (head/neck, arms, trunk and legs with area score of 0.1, 0.2, 0.3 and 0.4 respectively). This test included combination of both degree of involvement (assessed as per the % of affected body area using a 7-point scale such that 0=0% involvement, 1=1-9%, 2=10-29%, 3=30-49%, 4=50-69%, 5=70-89% and 6=90-100%) and severity (evaluated individually using a 5-point scale that ranged as 0=No evidence of sign, 1=slight evidence, 2=moderate evidence, 3=marked evidence and 4=very marked, most severe evidence of sign) of erythema, induration and desquamation in each of the same 4 areas. PASI score ranges from 0(no psoriasis) to 72(worse psoriasis). Final PASI=(sum of severity score for each area)x(% body affected score x area score). Baseline=Day 1. The change from Baseline was the difference between post-Baseline and Baseline.

Psoriatic lesions were assessed using the PASI. PASI score was determined by evaluation of BSA covered by plaque psoriasis in 4 areas (head/neck, arms, trunk and legs with area score of 0.1, 0.2, 0.3 and 0.4 respectively). This test included combination of both degree of involvement (assessed as per the % of affected body area using a 7-point scale such that 0=0% involvement, 1=1-9%, 2=10-29%, 3=30-49%, 4=50-69%, 5=70-89% and 6=90-100%) and severity (evaluated individually using a 5-point scale that ranged as 0=No evidence of sign, 1=slight evidence, 2=moderate evidence, 3=marked evidence and 4=very marked, most severe evidence of sign) of erythema, induration and desquamation in each of the same 4 areas. PASI score ranges from 0(no psoriasis) to 72(worse psoriasis). Final PASI=(sum of severity score for each area)x(% body affected score x area score). Baseline=Day 1.

Psoriatic lesions were assessed using the PASI. PASI score was determined by evaluation of BSA covered by plaque psoriasis in 4 areas (head/neck, arms, trunk and legs with area score of 0.1, 0.2, 0.3 and 0.4 respectively). This test included combination of both degree of involvement (assessed as per the % of affected body area using a 7-point scale such that 0=0% involvement, 1=1-9%, 2=10-29%, 3=30-49%, 4=50-69%, 5=70-89% and 6=90-100%) and severity (evaluated individually using a 5-point scale that ranged as 0=No evidence of sign, 1=slight evidence, 2=moderate evidence, 3=marked evidence and 4=very marked, most severe evidence of sign) of erythema, induration and desquamation in each of the same 4 areas. PASI score ranges from 0(no psoriasis) to 72(worse psoriasis). Final PASI=(sum of severity score for each area)x(% body affected score x area score). Baseline was Day 1.

The severity of psoriatic lesions over the whole body were assessed by the investigator using the PGA scoring system. A 0 to 6 point rating scale was used, as follows: 0 = Clear (no signs of psoriasis), 1 = Almost clear (slight elevation, scale and/or erythema), 2 = Mild (mild plaque elevation, scale and/or erythema), 3 = Mild to moderate (mild plaque elevation with moderate erythema and/or scale), 4 = Moderate (moderate plaque elevation, scale and/or erythema), 5 = Moderate to severe (marked plaque elevation, scale and/or erythema), 6 = Severe (very marked plaque elevation, scale and/or erythema). Higher scores indicated worse psoriasis. The Baseline value was the value obtained on Day 1. The scores were reported with the last observation carried forward (LOCF) analysis.

The severity of psoriatic lesions over the whole body were assessed by the investigator using the PGA scoring system. A 0 to 6 point rating scale was used, as follows: 0 = Clear (no signs of psoriasis), 1 = Almost clear (slight elevation, scale and/or erythema), 2 = Mild (mild plaque elevation, scale and/or erythema), 3 = Mild to moderate (mild plaque elevation with moderate erythema and/or scale), 4 = Moderate (moderate plaque elevation, scale and/or erythema), 5 = Moderate to severe (marked plaque elevation, scale and/or erythema), 6 = Severe (very marked plaque elevation, scale and/or erythema). Higher scores indicated worse psoriasis. The Baseline value was the value obtained on Day 1. The scores were reported with the last observation carried forward (LOCF) analysis.

PASI 75 was >= 75% improvement from Baseline in PASI score. Psoriatic lesions were assessed by the investigator using a PASI score. PASI score was determined by evaluation of BSA covered by plaque psoriasis in 4 areas (head/neck, arms, trunk and legs with area score of 0.1, 0.2, 0.3 and 0.4 respectively). This test included combination of both degree of involvement (assessed as per the % of affected body area using a 7-point scale such that 0=0% involvement, 1=1-9%, 2=10-29%, 3=30-49%, 4=50-69%, 5=70-89% and 6=90-100%) and severity (evaluated individually using a 5-point scale that ranged as 0=No evidence of sign, 1=slight evidence, 2=moderate evidence, 3=marked evidence and 4=very marked, most severe evidence of sign) of erythema, induration and desquamation in each of the same 4 areas. PASI score ranges from 0(no psoriasis) to 72(worse psoriasis). Final PASI=(sum of severity score for each area)x(% body affected score x area score). Baseline was Day 1.

The severity of psoriatic lesions over the whole body were assessed by the investigator using the PGA scoring system. A 0 to 6 point rating scale was used, as follows: 0 = Clear (no signs of psoriasis), 1 = Almost clear (slight elevation, scale and/or erythema), 2 = Mild (mild plaque elevation, scale and/or erythema), 3 = Mild to moderate (mild plaque elevation with moderate erythema and/or scale)4 = Moderate (moderate plaque elevation, scale and/or erythema), 5 = Moderate to severe (marked plaque elevation, scale and/or erythema), 6 = Severe (very marked plaque elevation, scale and/or erythema). The Baseline value was the value obtained on Day 1. The scores were reported with the last observation carried forward (LOCF) analysis.

The visual analogue scale (VAS) was used to assess itch. The participants rated the intensity of itch over the past week by marking a line on a 100 millimeter(mm) (0 to 100 mm) long scale. A line placed on the extreme left, that is 0 mm indicated no noticeable itching sensation and extreme right that is 100 mm indicated maximum itching sensation. This scale has no subscales. The participant perception of their symptoms was measured using the VAS itch score. The Baseline value was the value obtained on Day 1. The change from Baseline was the difference between post-Baseline and Baseline.

The visual analogue scale (VAS) was used to assess itch. The participants rated the intensity of itch over the past week by marking a line on a 100 mm (0 to 100 mm) long scale. A line placed on the extreme left, that is 0 mm indicated no noticeable itching sensation and extreme right that is 100 mm indicated maximum itching sensation. This scale has no subscales. The participant perception of their symptoms was measured using the VAS itch score. Itch VAS scores at Week 2, 4, 8 and 12 are reported.

The DLQI was used to assess a participant's health-related quality of life. Participants completed the questionnaire to evaluate how their psoriasis affected their life over the week before the assessment took place. Each of the 10 questions was scored out of 0-3 as; 0 = Not at all, 1 = A little, 2 = A lot and 3 = Very much. The total score for the DLQI was calculated by adding up all the individual scores for each question resulting in a minimum of 0 and a maximum of 30. Higher score indicated worsening of participant's quality of life. The Baseline value was the value obtained on Day 1. The change from Baseline was the difference between post-Baseline and Baseline.

Blood samples were taken to measure plasma concentrations of GSK2586184. A two-compartment model with a three-compartment transit model was used to derive PK parameters.

Blood samples were taken to measure plasma concentrations of GSK2586184. A two-compartment model with a three-compartment transit model was used to derive PK parameters.

Blood samples were taken to measure plasma concentrations of GSK2586184. A two-compartment model with a three-compartment transit model was used to derive PK parameters.

Serum Neopterin is a marker of psoriatic disease activity. Blood samples were collected for estimation of serum neoprotein concentration. Baseline was Day 1. The change from Baseline was the difference between post-Baseline and Baseline.