GSK2982772 Study in Subjects With Ulcerative Colitis

GlaxoSmithKline36 enrolled

Overview

This study is the first experience with GSK2982772, a receptor-interacting protein-1 (RIP1) kinase inhibitor, in subjects with active ulcerative colitis (UC). The primary objective will be to investigate the safety and tolerability of repeat oral doses of GSK2982772 60 mg or placebo three times daily for 42 days (Part A) followed by open label with GSK298772 60 mg three times daily for 42 days (Part B). In addition to pharmacokinetics (PK), a number of experimental and clinical endpoints will be employed to obtain information on the pharmacodynamics (PD), and preliminary efficacy in subjects with active UC. Although no formal hypothesis will be tested, these endpoints will enable a broader understanding of the mechanism of action and potential for clinical efficacy of GSK2982772 in UC. Within 30 Days of screening visit, subjects will be randomized to receive either GSK2982772 60 mg or placebo orally three times daily for 42 Days (6 weeks) in a 2:1 ratio in Part A study. Subjects who complete the Part A study will move to open label Part B study to receive GSK2982772 60 mg three times daily for an additional 42 Days (6 weeks). After the open label (Part B) treatment period, subjects will enter the Follow-up period which lasts for 28 Days (+/- 3 Days) post the last administration of study medication. The total duration of participation in the study will be approximately 20 Weeks from screening to the last study visit.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

DOUBLE

Enrollment

Conditions

Colitis, Ulcerative

Interventions

GSK2982772DRUG

GSK2982772 is available as a 30 mg white to almost white, round film coated tablet which will be administered as two tablets three times a day as directed.

PlaceboDRUG

Placebo is available as a white to almost white, round film coated tablet which will be administered as two tablets three times a day as directed.

Eligibility

Sex: ALLMin age: 18 YearsMax age: 75 Years

Medical Language ↔ Plain English

Inclusion Criteria: * Between 18 and 75 years of age inclusive, at the time of signing the informed consent. * Subjects that do not have any medical conditions, other than active UC, that in the opinion of the Investigator put the subject at unacceptable risk or interfere with study assessments or integrity of the data. These medical conditions should be stable at the time of screening and are expected to remain stable for the duration of the study. * Subject has had a confirmed diagnosis of active UC, as documented by complete diagnostic colonoscopy to the terminal ileum (TI) with biopsy performed \>=3 months prior to screening. If diagnostic colonoscopy was not performed to the TI, it must be documented by the principal investigator that the subject has diffuse inflammation from the rectum extending proximally to the colon in a continuous and uniform way. * A Complete Mayo Score of \>=3 points and endoscopy sub score of 2 to 3 at screening, despite concurrent treatment with at least 1 of the following (oral corticosteroids or any oral 5-aminosalicylates (5-ASA) or purine analogues or all as defined): Oral 5-ASA at a stable dose (equivalent to \>=2.4 grams per day (g/day) of Asacol) for at least 4 weeks prior to first dose. Must remain on a stable dose until end of treatment; Purine analogues (azathioprine, mercaptopurine, thiopurines) or methotrexate for at least 12 weeks prior to first dose. Must remain on a stable dose until end of treatment; Stable low dose oral corticosteroid (up to 20 mg prednisolone or equivalent) for 2 weeks prior to sigmoidoscopy. Must remain on a stable dose until end of treatment. * If on rectal 5-ASA or corticosteroids, must remain on a stable dose for at least 4 weeks prior to first dose. Must remain on stable dose until the end of treatment. * Subject is naive to any biological therapies for UC OR Subject may have had previous exposure to a single anti-tumor necrosis factor (TNF) biologic agent which was discontinued for reasons other than primary non-response more than 8 weeks (or 5 half-lives whichever is longer) prior to first dose OR Subject may have had previous exposure to a single biologic agent (example, vedolizumab) in the context of a previous clinical trial. The biologic agent must have been discontinued more than 8 weeks (or 5 half-lives whichever is longer) prior to first dose. Note: Exposure to a single biologic agent is not required in addition to inclusion criteria listed above (number fourth and fifth on the list). * A body mass index (BMI) within range of 18.5 to 35 kilogram per meter square (kg/m\^2) (inclusive) at screening. * Male and Female subjects: Males: Male subjects with female partners of child bearing potential must comply with the contraception requirements. Females: A female subject is eligible to participate if she is not pregnant (as confirmed by a negative serum human chorionic gonadotrophin (hCG) test), not lactating, and at least one of the following conditions applies: Non-reproductive potential defined as 1) Pre-menopausal females with one of the following: Documented tubal ligation; Documented hysteroscopic tubal occlusion procedure with follow-up confirmation of bilateral tubal occlusion; Hysterectomy; Documented Bilateral Oophorectomy. 2) Postmenopausal defined as 12 months of spontaneous amenorrhea in questionable cases a blood sample with simultaneous follicle stimulating hormone (FSH) and estradiol levels consistent with menopause. Females on hormone replacement therapy (HRT) and whose menopausal status is in doubt will be required to use one of the highly effective contraception methods if they wish to continue their HRT during the study. Otherwise, they must discontinue HRT to allow confirmation of post-menopausal status prior to study enrolment. Reproductive potential and agrees to follow one of the options listed in the Modified List of Highly Effective Methods for Avoiding Pregnancy in Females of Reproductive Potential (FRP) from 30 days prior to the first dose of study medication and until at least 2 days after the last dose of study medication and completion of the follow-up visit. The Investigator is responsible for ensuring that subjects understand how to properly use methods of contraception. * Capable of giving signed informed consent which includes compliance with the requirements and restrictions listed in the consent form and protocol. Exclusion Criteria: * Subject with diagnosis of indeterminate colitis, Crohn's Disease, infectious colitis, or ischemic colitis. * Subject with fulminant UC, or UC limited to the rectum (disease extent \<15 centimeters (cm) from the anal verge). * Subject with previous small bowel or colonic surgery(with exception of appendectomy), histological evidence of colonic dysplasia or bowel stricture. * Subject with colostomy, fistulae or known symptomatic stenosis of the intestine. * Subject with toxic megacolon. * Subject with positive Clostridium difficile toxin test or active/previous colonic cytomegalo virus (CMV) infection. * Subject with current history of suicidal ideation behavior (SIB) as measures using the Columbia Suicide Severity Rating Scale (C-SSRS) or history of attempted suicide. * An active infection, or a history of infections as follows: Hospitalization for treatment of infection within 60 days before first dose (Day 1). Currently on any suppressive therapy for a chronic infection (such as pneumocystis, cytomegalovirus, herpes simplex virus, herpes zoster and atypical mycobacteria). Use of parenteral (intravenous (IV) or intramuscular) antibiotics (antibacterials, antivirals, antifungals, or antiparasitic agents) for an infection within 60 days before first dose. A history of opportunistic infections within 1 year of screening (example: pneumocystis jirovecii, CMV pnemonitis, aspergillosis). This does not include infections that may occur in immunocompetent individuals, such as fungal nail infections or vaginal candidiasis, unless it is of an unusual severity or recurrent nature. Recurrent or chronic infection or other active infection that, in the opinion of the Investigator might cause this study to be detrimental to the patient. History of tuberculosis (TB), irrespective of treatment status. A positive diagnostic TB test at screening defined as a positive QuantiFERON-TB Gold test or T-spot test. In cases where the QuantiFERON or T-spot test is indeterminate, the subject may have the test repeated once, but they will not be eligible for the study unless the second test is negative. In cases where the QuantiFERON or T-spot test is positive, but a follow-up chest x-ray, locally read by a radiologist, shows no evidence of current or previous pulmonary tuberculosis, the subject may be eligible for the study at the discretion of the Investigator and GlaxoSmithKline (GSK) Medical Monitor. * QTc \>450 millisecond (msec) or QTc \>480 msec for subjects with bundle branch block at screening. * ALT \>2 times upper limit of normal (ULN) and bilirubin \>1.5 times ULN (isolated bilirubin \>1.5 times ULN is acceptable if bilirubin is fractionated and direct bilirubin \<35 percent) at screening. * Current active or chronic history of liver or biliary disease (with the exception of Gilbert's syndrome or asymptomatic gallstones). * Current or history of renal disease or estimated glomerular filtration rate (GFR) by Chronic Kidney Disease Epidemiology Collaboration equation (CKD-EPI) calculation \<60 milliliter per minute per 1.73 meter square (mL/min/1.73 m\^2) at screening. * Hereditary or acquired immunodeficiency disorder, including immunoglobulin deficiency unless subject has a documented history of selective immunoglobulin A (IgA) deficiency. * A major organ transplant (example: heart, lung, kidney, liver) or hematopoietic stem cell/marrow transplant. * Any planned surgical procedure during the study. * A history of malignant neoplasm within the last 5 years, except for adequately treated non-metastatic cancers of the skin (basal or squamous cell) or carcinoma in situ of the uterine cervix that has been fully treated and shows no evidence of recurrence. * The subject has received treatment with the protocol listed prohibited therapies or changes to those treatments, within the prescribed timeframe. Other medications (including vitamins, herbal and dietary supplements) will be considered on a case-by-case basis, and will be allowed if in the opinion of the Investigator the medication will not interfere with the study procedures or compromise subject safety. * History of alcohol or drug abuse that would interfere with the ability to comply with the study. * History of sensitivity to any of the study treatments, or components thereof or a history of drug or other allergy that, in the opinion of the Investigator or Medical Monitor, contraindicates their participation. * Received a live or attenuated vaccine within 30 days of randomization OR plan to receive a vaccination during the study until 5 half-lives (or 2 days) plus 30 days after receiving GSK2982772. * The subject has participated in a clinical trial and has received an investigational product within 30 days or 5 half-lives, whichever is longer before the first dose of study medication, or plans to take part in another clinical trial (not inclusive of any UC registry study where no study medication is being administered) at the same time as participating in this clinical trial. * Hemoglobin \<10 grams per deciliter (g/dL); hematocrit \<30 percent, white blood cell count \<=3,000 per millimeter cube (mm\^3) (\<=3.0 into 10\^9 per liter); platelet count \<=100,000 per microliter (\<=100 into 10\^9 per liter); absolute neutrophil count \<=1.5 into 10\^9 per liter. * Presence of hepatitis B surface antigen (HBsAg), positive hepatitis C antibody test result at screening or within 3 months prior to first dose of study treatment. As potential for and magnitude of immunosuppression with this compound is unknown, subjects with presence of hepatitis B core antibody (HBcAb) should be excluded. * A positive serology for human immunodeficiency virus (HIV) 1 or 2 at screening. * Where participation in the study would result in donation of blood or blood products in excess of 500 mL within 3 months. * Exposure to more than 4 investigational medicinal products within 12 months prior to the first dose.

Locations (23)

GSK Investigational Site

Moreno Valley, California, United States

GSK Investigational Site

San Diego, California, United States

GSK Investigational Site

Marrero, Louisiana, United States

GSK Investigational Site

Chesterfield, Michigan, United States

GSK Investigational Site

Great Neck, New York, United States

GSK Investigational Site

Cedar Park, Texas, United States

GSK Investigational Site

Ulm, Baden-Wurttemberg, Germany

GSK Investigational Site

Amsterdam, Netherlands

GSK Investigational Site

Katowice, Poland

GSK Investigational Site

Ksawerów, Poland

...and 13 more locations

Outcomes

Primary Outcomes

Part A: Number of Participants With Common (>=5%) Non-serious Adverse Events (Non-SAEs) and Any Serious Adverse Events (SAEs)

An AE is any untoward medical occurrence in a participant or clinical investigation participant, temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product. 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 important medical events; is associated with liver injury and impaired liver function.

Time frame: Up to Day 43

Part B: Number of Participants With Common (>=5%) Non Serious AEs and SAEs

Time frame: From Day 44 to Day 112

Part A: Number of Participants With Worst Case Abnormal Clinical Chemistry Parameters by Potential Clinical Importance (PCI) Criteria

Clinical chemistry parameters with PCI ranges: aspartate amino transferase (AST), alanine amino transferase (ALT), and alkaline phosphatase (ALP) (high: \>=2 times upper limit of normal \[ULN\] units per liter \[U/L\]); calcium (low: \<2 millimoles per liter \[mmol/L\] and high: \>2.75 mmol/L); glucose (low: \<3 and high: \>9 mmol/L); potassium (low: \<3 and high: \>5.5 mmol/L); sodium (low: \<130 and high: \>150 mmol/L); total bilirubin (high: \>=1.5 times ULN micromoles per liter \[µmol/L\]); high density lipoproteins (HDL) 0.9 to 99.99 mmol/L; low density lipoprotein (LDL) 0 to 3.35 mmol/L; triglycerides 0 to 2.24 mmol/L, creatinine (high: change from Baseline \[BL\]\>44.2 µmol/L). Participants were counted in the worst case category that their value changed to (low, within range or no change, or high) unless there was no change in their category. Participants whose value category was unchanged (e.g., High to High), or whose value became within range, were recorded in the 'To within Range or No Change'

Time frame: Up to Day 43

Part B: Number of Participants With Worst Case Abnormal Clinical Chemistry Parameters by Potential Clinical Importance (PCI) Criteria

Clinical chemistry parameters with their PCI ranges were: AST, ALT, and ALP (high: \>=2 ULN \[U/L\]); calcium (low: \<2 mmol/L and high: \>2.75 mmol/L); glucose (low: \<3 and high: \>9 mmol/L); potassium (low: \<3 and high: \>5.5 mmol/L); sodium (low: \<130 and high: \>150 mmol/L); total bilirubin (high: \>=1.5 times ULN \[µmol/L\]); HDL 0.9 to 99.99 mmol/L; LDL 0.to 3.35 mmol/L; triglycerides 0 to 2.24 mmol/L, creatinine (high: change from BL \>44.2 µmol/L). Participants were counted in the worst case category that their value changed to (low, within range or no change, or high) unless there was no change in their category. Participants whose value category was unchanged (e.g., High to High), or whose value became within range, were recorded in the 'To within Range or No Change' category.

Time frame: From Day 44 to Day 112

Part A: Number of Participants With Worst Case Abnormal Hematology Parameters by PCI Criteria

Hematology parameters with their PCI ranges were: hematocrit (high: \>0.54 proportion of red blood cells in blood and low: change from BL\<0.075); hemoglobin (high: \>180 grams per liter \[g/L\] and low: change from BL\<25 g/L); lymphocytes (low: \<0.8 Giga cells/L); platelet count (low: \<100 Giga cells/L and high: \>550 Giga cells/L); neutrophil count (low: \<1.5 Giga cells/L); white blood cell (WBC) count (low: \<3 Giga cells/L and high: \>20 Giga cells/L). Participants were counted in the worst-case category that their value changed to (low, within range or no change, or high) unless there was no change in their category. Participants whose value category was unchanged (e.g., High to High), or whose value became within range, were recorded in the 'To within Range or No Change' category. Participants were counted twice if the participant had both values that changed 'To Low' and 'To High'.

Time frame: Up to Day 43

Part B: Number of Participants With Worst Case Abnormal Hematology Parameters by PCI Criteria

Hematology parameters with their PCI ranges were: hematocrit (high: \>0.54 proportion of red blood cells in blood and low: change from BL\<0.075); hemoglobin (high: \>180 g/L and low: change from BL\<25 g/L); lymphocytes (low: \<0.8 Giga cells/L); platelet count (low: \<100 Giga cells/L and high: \>550 Giga cells/L); neutrophil count (low: \<1.5 Giga cells/L); WBC count (low: \<3 Giga cells/L and high: \>20 Giga cells/L). Participants were counted in the worst-case category that their value changed to (low, within range or no change, or high) unless there was no change in their category. Participants whose value category was unchanged (e.g., High to High), or whose value became within range, were recorded in the 'To within Range or No Change' category. Participants were counted twice if the participant had both values that changed 'To Low' and 'To High'.

Time frame: From Day 44 to Day 112

Part A: Number of Participants With Worst Case Abnormal Urinalysis Results by Dipstick Method

Urine samples were collected for the assessment of following urine parameters by dipstick method: glucose, protein, blood and ketones. The dipstick test gives results in a semi-quantitative manner, and results for urinalysis parameters of urine glucose, protein, blood and ketones can be read as negative (-), trace, 1+, 2+, 3+, 4+, 5+ indicating proportional concentrations in the urine sample. Number of participants with abnormal results were reported as 'increase to trace' or 'increase to 1+, 2+, 3+, 4+, 5+' relative to BL (Day 1) value. Participants whose value was unchanged (e.g., Trace to Trace), or whose value was decreased, were recorded in the 'No change or Decreased' category.

Time frame: Up to Day 43

Part B: Number of Participants With Worst Case Abnormal Urinalysis Results by Dipstick Method

Time frame: From Day 44 to Day 112

Part A: Number of Participants With Worst Case Abnormal Blood Pressure Results by PCI Criteria

Vital signs were measured in a semi-supine position after 5 minutes rest and included body temperature, systolic and diastolic blood pressure. The clinical concern range for vital signs were: systolic blood pressure (SBP) (low: \<85 and high: \>160 millimeters of mercury \[mmHg\]); diastolic blood pressure (DBP) (low: \<45 and high: \>100 mmHg). Participants were counted in the worst case category that their value changed to (low, within range or no change, or high) unless there was no change in their category. Participants whose value category was unchanged (e.g., High to High), or whose value became within range, were recorded in the 'To within Range or No Change' category.

Time frame: Up to Day 43

Part B: Number of Participants With Worst Case Abnormal Blood Pressure Results by PCI Criteria

Vital signs were measured in a semi-supine position after 5 minutes rest and included body temperature, systolic and diastolic blood pressure. The clinical concern range for vital signs were: SBP (low: \<85 and high: \>160 mmHg); DBP (low: \<45 and high: \>100 mmHg). Participants were counted in the worst case category that their value changed to (low, within range or no change, or high) unless there was no change in their category. Participants whose value category was unchanged (e.g., High to High), or whose value became within range, were recorded in the 'To within Range or No Change' category.

Time frame: From Day 44 to Day 112

Part A: Number of Participants With Worst Case Abnormal Heart Rate (HR) Results by PCI Criteria

Vital signs were measured in a semi-supine position after 5 minutes rest which included HR. The clinical concern range for HR (low \<40 beats per min \[bpm\] and high \>100 bpm). Participants were counted in the worst case category that their value changed to (low, within range or no change, or high) unless there was no change in their category. Participants whose value category was unchanged (e.g., High to High), or whose value became within range, were recorded in the 'To within Range or No Change' category.

Time frame: Up to Day 43

Part B: Number of Participants With Worst Case Abnormal HR Results by PCI Criteria

Vital signs were measured in a semi-supine position after 5 minutes rest which included HR. The clinical concern range for HR (low \<40 bpm and high \>100 bpm). Participants were counted in the worst case category that their value changed to (low, within range or no change, or high) unless there was no change in their category. Participants whose value category was unchanged (e.g., High to High), or whose value became within range, were recorded in the 'To within Range or No Change' category.

Time frame: From Day 44 to Day 112

Part A: Number of Participants With Worst-case Abnormal Electrocardiogram (ECG) Findings

12-lead ECGs were recorded with the participants in a supine position using an ECG machine. Number of participants with worst-case clinically significant and not clinically significant abnormal ECG findings have been presented. 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.

Time frame: Up to Day 43

Part B: Number of Participants With Worst-case Abnormal ECG Findings

Time frame: From Day 44 to Day 112

Secondary Outcomes

Part A: Percentage of Participants Who Achieved an Absolute Mayo Endoscopy Subscore of 0 or 1 at Day 43

The Mayo scoring system was used to assess UC disease activity, scoring ranges from 0 to 12, calculated as sum of 4 sub-scores, higher scores indicating more severe disease. The 4 sub-scores are stool frequency (0=normal number of stools;1=1 to 2 stools/day more than normal;2=3 to 4 stools/day more than normal;3= \>4 stools/day more than normal); rectal bleeding (0=no blood seen; 1=visible blood with stools less than half the time;2= visible blood with stool half the time or more;3=passing blood alone); findings at endoscopy (0=normal or inactive disease;1=mild disease \[erythema,decreased vascular pattern,mild friability\];2=moderate disease \[marked erythema, lack of vascular pattern, friability, erosions\];3=severe disease \[spontaneous bleeding, ulceration\]); and physician's global assessment (PGA) (0=normal;1=mild;2=moderate;3=severe). Number of participants with Mayo endoscopic sub-score of 0 or 1 are presented. (range=0 to 3, higher scores indicating more severe disease).

Time frame: Day 43

Part B: Percentage of Participants Who Achieved an Absolute Mayo Endoscopy Subscore of 0 or 1 at Day 85

The Mayo scoring system was used to assess UC disease activity, scoring ranges from 0 to 12, calculated as sum of 4 sub-scores, higher scores indicating more severe disease. The 4 sub-scores are stool frequency (0=normal number of stools; 1=1 to 2 stools/day more than normal; 2=3 to 4 stools/day more than normal; 3= \>4 stools/day more than normal); rectal bleeding (0=no blood seen; 1=visible blood with stools less than half the time; 2= visible blood with stool half the time or more; 3=passing blood alone); findings at endoscopy (0=normal or inactive disease; 1=mild disease \[erythema, decreased vascular pattern, mild friability\]; 2=moderate disease \[marked erythema, lack of vascular pattern, friability, erosions\]; 3=severe disease \[spontaneous bleeding, ulceration\]); and PGA (0=normal; 1=mild; 2=moderate; 3=severe). Number of participants with Mayo endoscopic sub-score of 0 or 1 are presented. (range=0 to 3, higher scores indicating more severe disease).

Time frame: Day 85

Part A: Change From Baseline in Ulcerative Colitis Endoscopic Index of Severity (UCEIS) Total Score

UCEIS was used as an additional tool to assess disease activity based on 3 sub-scales: 'endoscopic vascular pattern, bleeding, erosions and ulcerations'. UCEIS total score was calculated by sum of all 3 sub-scale scores. Total score ranges from 0 to 8, with higher scores indicating more severe disease. Individual sub-scales were vascular pattern (0=Normal, 1=Patchy loss, 2=Obliterated); bleeding (0=None, 1=Mucosal, 2=Luminal mild, 3=Luminal severe); erosions and ulcerations (0=None, 1=Erosions, 2=Superficial ulcer, 3=Deep ulcer). BL is defined as the latest pre-dose assessment at Screening (within 30 days prior to Day 1). Change from BL was calculated as post-BL visit value minus BL value.

Data from ClinicalTrials.gov

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Time frame: Baseline (screening - within 30 days prior to Day 1) and Day 43

Part B: Change From Baseline in Ulcerative Colitis Endoscopic Index of Severity (UCEIS) Total Score

UCEIS was used as an additional tool to assess disease activity based on 3 sub-scales: 'endoscopic vascular pattern, bleeding, erosions and ulcerations'. UCEIS total score was calculated by sum of all 3 sub-scale scores. Total score ranges from 0 to 8, with higher scores indicating more severe disease. Individual sub-scales were vascular pattern (0=Normal, 1=Patchy loss, 2=Obliterated); bleeding (0=None, 1=Mucosal, 2=Luminal mild, 3=Luminal severe); erosions and ulcerations (0=None, 1=Erosions, 2=Superficial ulcer, 3=Deep ulcer). Baseline is defined as the latest pre-dose assessment at Screening (within 30 days prior to Day 1). Change from BL was calculated as post-BL visit value minus BL value.

Time frame: Baseline (screening - within 30 days prior to Day 1) and Day 85

Part A: Change From Baseline in Mean C Reactive Protein (CRP)

Blood samples were collected to measure CRP. BL is defined as the latest pre-dose assessment on Day 1. Change from BL is the value at indicated time point minus BL value.

Time frame: Baseline (Day 1, pre-dose) and Days 15, 29, 43

Part B:Change From Baseline in Mean CRP

Blood samples were collected to measure CRP. BL is defined as the latest pre-dose assessment on Day 1. Change from BL is the value at indicated time point minus BL value.

Time frame: Baseline (Day 1, pre-dose) and Days 57, 71, 85

Part A: Change From Baseline in Fecal Calprotectin (FCP)

Fecal sample were collected to measure FCP. BL is defined as the latest pre-dose assessment on Day 1. Change from BL is the value at indicated time point minus BL value.

Time frame: Baseline (Day 1, pre-dose) and Days 15, 29, 43

Part B:Change From Baseline in FCP

Fecal sample were collected to measure FCP. BL is defined as the latest pre-dose assessment on Day 1. Change from BL is the value at indicated time point minus BL value.

Time frame: Baseline (Day 1, pre-dose) and Days 57, 71, 85

Part A: Change From Baseline in Modified Riley Scale Score (MRS)

The MRS is a 4-point scale (none, mild, moderate and severe) which scores histologic activity based on localization and quantification of neutrophils in the mucosa. MRS Score ranges from 0 to 7, with higher scores indicates more severity. 0= Normal biopsy, 1= Lamina propria neutrophils only (Scattered individual neutrophils), 2= Lamina propria neutrophils only (Patchy collections of neutrophils), 3= Lamina propria neutrophils only (Diffuse neutrophils infiltrate), 4= Cryptitis/crypt abscesses (\<25% crypts involved), 5= Cryptitis/crypt abscesses (25% to 74% crypts involved), 6= Cryptitis/crypt abscesses (\>=75% crypts involved), 7= Erosion or ulceration present. Score 0 indicates normal condition; 1 to 3 indicates mild condition; 4 to 6 indicates moderate condition and score 7 indicates severe condition. BL is defined as the latest pre-dose assessment. Change from BL is the value at indicated time point minus BL value.

Time frame: Baseline (Day 1, pre-dose) and Day 43

Part B: Change From Baseline in MRS Score

Time frame: Baseline (Day 1, pre-dose) and Day 85

Part A: Change From Baseline in Geboes Index Total Score

Geboes score is a 7-items instrument which classifies histologic changes and generates a score from 0 to 5.4. The 7 items are: grade 0=structural-architectural changes (scored from 0.0 to 0.3); grade 1=chronic inflammatory infiltrate (scored from 1.0 to 1.3); grade 2A=lamina propria neutrophils (scored from 2.0 to 2.3), grade 2B= lamina propria eosinophils (scored from 2.0 to 2.3); 3=neutrophils in the epithelium (scored from 3.0 to 3.3); 4=crypt destruction (scored from 4.0 to 4.3); 5=erosions or ulceration (scored from 5.0 to 5.4). The most severe observation that the histopathologist sees on the slide is considered as the Geboes index total score, ranges from 0 to 5.4, with higher scores indicates severe disease. BL is defined as the latest pre-dose assessment before Day 1. Change from BL is the value at indicated time point minus BL value.

Time frame: Baseline and Day 43

Part B: Change From Baseline in Geboes Index Total Score

Time frame: Baseline and Day 85

Part A: Number of Participants Who Achieved Mayo Clinical Response

Mayo Clinical Response is defined as a \>=3 points or \>=30% improvement from BL in Total Mayo Score, along with a decrease in the rectal bleeding sub-score of \>= 1 point. The Mayo scoring system ranges from 0 to 12, calculated as sum of 4 sub-scores, higher scores indicating more severe disease. The 4 sub-scores are stool frequency (0=normal number of stools; 1=1 to 2 stools/day more than normal; 2=3 to 4 stools/day more than normal; 3= \>4 stools/day more than normal); rectal bleeding (0=no blood seen; 1=visible blood with stools less than half the time; 2= visible blood with stool half the time or more; 3=passing blood alone); findings at endoscopy (0=normal or inactive disease; 1=mild disease \[erythema, decreased vascular pattern, mild friability\]; 2=moderate disease \[marked erythema, lack of vascular pattern, friability, erosions\]; 3=severe disease \[spontaneous bleeding, ulceration\]); and PGA (0=normal; 1=mild; 2=moderate; 3=severe).

Time frame: Day 43

Part B: Number of Participants Who Achieved Mayo Clinical Response

Time frame: Day 85

Part A: Number of Participants Who Achieved Mayo Clinical Remission

Mayo clinical remission is defined as total mayo score of 2 points or lower, with no individual subscore exceeding 1 point. The Mayo scoring system ranges from 0 to 12, calculated as sum of 4 sub-scores, higher scores indicating more severe disease. The 4 sub-scores are stool frequency (0=normal number of stools; 1=1 to 2 stools/day more than normal; 2=3 to 4 stools/day more than normal; 3= \>4 stools/day more than normal); rectal bleeding (0=no blood seen; 1=visible blood with stools less than half the time; 2= visible blood with stool half the time or more; 3=passing blood alone); findings at endoscopy (0=normal or inactive disease; 1=mild disease \[erythema, decreased vascular pattern, mild friability\]; 2=moderate disease \[marked erythema, lack of vascular pattern, friability, erosions\]; 3=severe disease \[spontaneous bleeding, ulceration\]); and PGA (0=normal; 1=mild; 2=moderate; 3=severe).

Time frame: Day 43

Part B: Number of Participants Who Achieved Mayo Clinical Remission

Time frame: Day 85

Part A: Change From Baseline in Partial Mayo Score

Partial Mayo Score is defined as the total score of 3 domain subscores-stool frequency, rectal bleeding and PGA. Scoring ranges from 0 to 9, higher scores indicating more severe disease. The Mayo scoring system has 4 sub-scores: Stool frequency (0=normal number of stools; 1=1 to 2 stools/day more than normal; 2=3 to 4 stools/day more than normal; 3= \>4 stools/day more than normal); rectal bleeding (0=no blood seen; 1=visible blood with stools less than half the time; 2= visible blood with stool half the time or more;3=passing blood alone); findings at endoscopy (0=normal or inactive disease;1=mild disease\[erythema,decreased vascular pattern,mild friability\];2=moderate disease\[marked erythema,lack of vascular pattern,friability,erosions\];3=severe disease \[spontaneous bleeding,ulceration\]);and PGA (0=normal; 1=mild; 2=moderate; 3=severe). Change from BL=post-BL value minus BL value (screening-within 30 days prior to Day 1).

Time frame: Baseline (Screening - within 30 days prior to Day 1) and at Days 15, 29, 43

Part B: Change From Baseline in Partial Mayo Score

Partial Mayo Score defined as total score of 3 domain subscores-stool frequency, rectal bleeding and PGA, ranges from 0 to 9, higher score indicate more severe disease. It has 4 sub-scores: Stool frequency (0=normal number of stools; 1=1 to 2 stools/day more than normal; 2=3 to 4 stools/day more than normal; 3= \>4 stools/day more than normal); rectal bleeding (0=no blood seen; 1=visible blood with stools less than half the time; 2= visible blood with stool half the time or more;3=passing blood alone); findings at endoscopy (0=normal or inactive disease;1=mild disease\[erythema,decreased vascular pattern,mild friability\];2=moderate disease\[marked erythema,lack of vascular pattern, friability, erosions\];3=severe disease \[spontaneous bleeding,ulceration\]);and PGA (0=normal, 3=severe). Change from BL=post-BL value minus BL value (screening-within 30 days prior to Day 1).

Time frame: Baseline and Day 85

Part A: Pre-dose Plasma Concentration of GSK2982772

Pre-dose blood sample was collected on Day 43 for the measurement of plasma concentration of GSK2982772. PK Population is defined as the participants in the safety population who received an active dose and for whom a GSK2982772 pharmacokinetic sample was obtained and analyzed

Time frame: Day 43

Part A: Post-dose Plasma Concentrations of GSK2982772

Post-dose blood sample were collected on Days 1 and 43 at 1, 2, 4 and 6 hours for the measurement of plasma concentration of GSK2982772.

Time frame: Days 1 and 43: 1, 2, 4 and 6 hours post dose

Part B: Trough Concentrations of GSK2982772 on Day 85

Blood samples were collected for the measurement of trough plasma concentration of GSK2982772 on Day 85.

Time frame: Day 85