A Study Evaluating the Effects of GLPG3970 Given as an Oral Treatment for 6 Weeks in Adults With Ulcerative Colitis

Study Overview
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Brief Summary
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The primary objective of this study was to evaluate the effect of GLPG3970 compared to placebo on the signs and symptoms of Ulcerative Colitis (UC) in participants with moderately to severely active UC.

Official Title
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A Randomized, Double-blind, Placebo-controlled, Multicenter Study to Evaluate the Safety, Tolerability, Efficacy, and Pharmacokinetics of GLPG3970, Administered Orally for 6 Weeks in Adult Subjects With Moderately to Severely Active Ulcerative Colitis

Conditions
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Ulcerative Colitis

Intervention / Treatment
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* Drug: GLPG3970
* Drug: Placebo


Participation Criteria
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Eligibility Criteria
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Key Inclusion Criteria: Documented diagnosis of UC of ≥3 months. The criteria for documentation of UC diagnosis based on endoscopy will be medical record documentation, and/or a colonoscopy report dated ≥3 months before screening, which shows features consistent with UC. Treatment-experienced participants with moderately to severely active disease, who have either previously demonstrated inadequate clinical response, loss of response, or intolerance to at least 1 course of standard-of-care (SoC) therapy for UC (i.e. steroids [oral or parenteral, including but not limited to prednisone, prednisolone, budesonide], 5-aminosalicylate [5- ASA] derivatives [including but not limited to mesalamine, sulfasalazine], anti-metabolites [including but not limited to azathioprine, 6 mercaptopurine, methotrexate], anti-tumor necrosis factor [TNF] agents, anti-integrins, Janus kinase [JAK] inhibitors), as confirmed by the investigator. Moderately to severely active UC as determined at screening by: Centrally-read endoscopic evidence of disease activity (MCS- endoscopy subscore [ES] ≥2 OR ulcerative colitis endoscopic index of severity [UCEIS] ≥4) with a minimum disease extent of 15 cm from anal verge; AND MCS stool frequency (SF) subscore ≥1; AND MCS rectal bleeding (RB) subscore ≥1. Participants currently receiving the following SoC therapies for UC are eligible providing they have been on a stable dose for the designated period of time and are anticipated to be stable throughout the study: oral corticosteroids (prednisone ≤20 mg/day or equivalent or budesonide ≤3 mg/day) stable dose for at least 2 weeks prior to first investigational product (IP) dosing. oral 5-ASA compounds (mesalamine ≤4 grams [g]/day or sulfasalazine ≤4 g/day) stable dose for at least 4 weeks prior to first IP dosing. oral thiopurines (azathioprine ≤2.5 mg/kg/day and 6-mercaptopurine 1.5 mg/kilograms [kg]/day) stable dose for at least 12 weeks prior to first IP dosing, or methotrexate ≤20 mg/week, stable dose for at least 12 weeks prior to first IP dosing. Key Exclusion Criteria: Diagnosis of Crohn's disease, indeterminate colitis, ischemic colitis, fulminant colitis, or toxic megacolon. Prior surgical intervention for UC (e.g. colectomy, partial colectomy, ileostomy or colostomy) or likely requirement for surgery for UC, during the study. History or evidence of incompletely resected colonic mucosal dysplasia. Exhibit acute severe UC per the following criteria: bloody diarrhea ≥6/day AND any of the following signs of systemic toxicity: Body temperature (oral or tympanic) ≥37.8 degrees celsius (°C) OR Resting pulse (after 5 min seated position) >90 beats per min OR hemoglobin <105 g/L, OR erythrocyte sedimentation rate >30 millimeters per hour (mm/h); OR C-reactive protein (CRP) >30 mg/L. Screening stool sample positive for ova and/or parasites, Clostridium difficile toxin, Escherichia coli, Salmonella species (spp), Shigella spp, Campylobacter spp or Yersinia spp. Participant testing positive at screening for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection as detected by real time polymerase chain reaction (RT-PCR), participants presenting any signs or symptoms as detected at baseline following careful physical examination (e.g. cough, fever, headaches, fatigue, dyspnea, myalgia, anosmia, dysgeusia, anorexia, sore throat, others) or reporting any signs and symptoms for the preceding 2 weeks, or participants who have been exposed to individuals with confirmed or suspected diagnosis of SARS-CoV-2 within 2 weeks prior to baseline. In addition, any other locally applicable standard diagnostic criteria may also apply to rule out SARS-CoV-2 infection. Note: Other protocol-defined Inclusion/Exclusion criteria may apply.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 64 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: Quadruple


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: GLPG3970<br>Participants received 400 milligrams (mg) GLPG3970 oral solution, once daily (QD) for a period of 6 weeks. | Drug: GLPG3970<br>* GLPG3970 powder and solvent for oral solution reconstituted prior to use.<br>|
| Placebo Comparator: Placebo<br>Participants received GLPG3970 matching placebo oral solution, QD for a period of 6 weeks. | Drug: Placebo<br>* Placebo powder and solvent for oral solution reconstituted prior to use.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Change From Baseline in Total MCS at Week 6 | The MCS is the primary tool for assessing ulcerative colitis activity. Total MCS is the sum of 4 subscores (i.e., stool frequency, rectal bleeding, endoscopic findings, and a physician's global assessment); each rated on a scale from 0 (normal) to 3 (severe). The total MCS value ranges from 0 to 12, with higher scores indicating more severe disease. Missing data were imputed using Rubin's multiple imputation. | Baseline and Week 6 | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Number of Participants With Treatment-Emergent Adverse Events (TEAEs) | Treatment-Emergent Adverse Events (TEAEs) were defined as Any adverse event (AE) with an onset date on or after the IP start date and no later than 14 days after last dose of IP, or worsening of any AE on or after the IP start date. Improvement or no change of any ongoing AEs on or after the IP start date are not considered treatment-emergent. If an AE was ongoing at the time of first IP intake and if there was no change or an improvement in its toxicity grade or its seriousness status, this AE was not considered as treatment-emergent. Serious TEAE was defined as a TEAE that Resulted in death and was life-threatening; Required in-patient hospitalization or prolongation of existing hospitalization; Resulted in persistent or significant disability/incapacity; Was a congenital anomaly / birth defect; Was medically significant. | First dose date up to 14 days after the last dose of study drug (up to 57 days) | 
| Plasma Concentration (Ctrough) of GLPG3970 | Ctrough was defined as plasma concentration level at the end of the dosing interval. | Day 15: pre-dose; Day 29: pre-dose; Day 43: pre-dose | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Colitis, Ulcer, Moderately active ulcerative colitis, Chronic inflammatory bowel disease, Inflammatory Bowel Diseases, Digestive System Diseases