VTX958 for the Treatment of Moderately to Severely Active Crohn's Disease

Study Overview
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Brief Summary
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This is a multicenter, randomized, double-blind placebo-controlled, parallel group study to evaluate the efficacy and safety of VTX958 in participants with moderately to severely active Crohn's Disease.

Detailed Description
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This is a multicenter, randomized, double-blind placebo-controlled, parallel group study to evaluate the efficacy and safety of VTX958 in participants with moderately to severely active Crohn's Disease. Approximately 132 eligible patients will be randomized, and randomization will be stratified by prior use of biologics for the treatment of CD (yes/no). The study consists of a 30-day Screening Period, a 12-week double-blind Induction Treatment Period, a 40-week double-blind Maintenance Treatment Period, an Open-Label Extension (OLE) of up to 144 weeks, and a 30-day safety Follow-Up Period. The maximum duration of treatment will be 36 months, including the Induction, Maintenance, and OLE Periods. For all participants, a Follow-Up visit will be performed at 30 days after the last dose of study drug. Objectives Primary Objectives * Evaluate the efficacy of VTX958 in achieving reduction in Crohn's Disease Activity Index (CDAI) score and endoscopic response at the end of the Induction Period Secondary Objectives Evaluate the efficacy of VTX958 in inducing clinical and symptomatic response and remission at the end of the Induction Period Evaluate the efficacy of VTX958 in inducing endoscopic response and clinical remission at the end of the Induction Period

Official Title
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A Phase 2, Multicenter, Randomized, Double-Blind, Placebo-Controlled, Parallel-Group Study to Evaluate the Efficacy and Safety of VTX958 in Participants With Moderately to Severely Active Crohn's Disease

Conditions
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Crohn Disease

Intervention / Treatment
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* Drug: VTX958
* Drug: VTX958
* Drug: VTX958 Placebo


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Men or women, 18 to 75 years of age, inclusive, at the time of consent Capable of giving signed informed consent Documented diagnosis of CD ≥ 3 months prior to Day 1. The diagnosis of CD must be confirmed by clinical, endoscopic, and histologic evidence. Moderately to severely active CD Exclusion Criteria: Current diagnosis of ulcerative colitis, indeterminate colitis, microscopic colitis, ischemic colitis, or infectious colitis Presence of a stoma or ileoanal pouch Presence of currently known complications of CD such as symptomatic bowel stricture(s) and >2 missing segments of the following 5 segments: terminal ileum, right colon, transverse colon, left and sigmoid colon, and rectum, fulminant colitis, toxic megacolon or any other manifestation that may require surgery or hospitalization Known diagnosis of short gut or bowel syndrome Previous exposure to VTX958 or any other TYK2 inhibitor (eg, deucravacitinib) in any study

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 75 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: VTX958 Dose A<br> | Drug: VTX958<br>* Dose A VTX958<br>|
| Experimental: VTX958 Dose B<br> | Drug: VTX958<br>* Dose B VTX958<br>|
| Placebo Comparator: VTX958 Placebo<br> | Drug: VTX958 Placebo<br>* Placebo<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Change in mean Crohn's disease Activity Index (CDAI) score from baseline to week 12 | Change in Mean CDAI (Crohn's disease Activity Index). CDAI is a weighted index comprising eight Crohn's Disease (CD)-related clinical and laboratory variables, to assess CD disease activity. Three of the variables, stool frequency, abdominal pain, and general well-being, are patient-reported measures recorded daily. The total CDAI score is calculated using the sum of each variable times the multiplier. The total score range of the CDAI is from 0 to 600. | During screening to week 12 | 
| The proportion of participants achieving endoscopic response at Week 12 | SES-CD is an endoscopic grading system is used to assess CD disease activity. The SES-CD assesses 4 endoscopic variables: the size of ulcers, ulcerated surface, affected surface, and presence of narrowing. Each variable score ranging from 0 to 3. The total SES-CD score is calculated using the sum of all parameter scores in 5 segments: terminal ileum, right colon, transverse colon, left colon, and rectum. | During screening to week 12 | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Change from baseline in mean simple endoscopic score in Crohn's disease SES-CD at Week 12 | Change from baseline in mean simple endoscopic score in Crohn's disease SED-CD at 12 weeks. The SES-CD is an endoscopic grading system is used to assess CD disease activity. The SES-CD assesses 4 endoscopic variables: the size of ulcers, ulcerated surface, affected surface, and presence of narrowing. Each variable score ranging from 0 to 3. The total SES-CD score is calculated using the sum of all parameter scores in 5 segments: terminal ileum, right colon, transverse colon, left colon, and rectum. | During screening to week 12 | 
| Proportion of participants achieving clinical remission at Week 12 | Clinical remission is defined as a CDAI score < 150. CDAI is a weighted index comprising eight Crohn's Disease (CD)-related clinical and laboratory variables, to assess CD disease activity. Three of the variables, stool frequency, abdominal pain, and general well-being, are patient-reported measures recorded daily. The total CDAI score is calculated using the sum of each variable times the multiplier. The total score range of the CDAI is from 0 to 600. | During screening to week 12 | 
| Proportion of participants achieving patient-reported outcome 2 (PRO2) remission at Week 12 | The proportion of participants achieving PRO2 remission at week 12. PRO2 remission is defined is an unweighted CDAI component of daily AP score ≤ 1 and unweighted CDAI component of daily average stool frequency (SF) score ≤ 3 | During screening to week 12 | 
| Proportion of participants achieving clinical response at Week 12 | Proportion of participants achieving clinical response at Week 12. A clinical response is defined as ≥ 100 points reduction from baseline in CDAI score or CDAI score < 150. CDAI is a weighted index comprising eight Crohn's Disease (CD)-related clinical and laboratory variables, to assess CD disease activity. Three of the variables, stool frequency, abdominal pain, and general well-being, are patient-reported measures recorded daily. The total CDAI score is calculated using the sum of each variable times the multiplier. The total score range of the CDAI is from 0 to 600. | During screening to week 12 | 
| Proportion of participants achieving both endoscopic response (outcome- measure # 2) and clinical remission (outcome measure # 4) at Week 12 | Proportion of participants achieving both endoscopic response (as described in outcome measure 2) and clinical remission (as described in outcome measure 4) at Week 12. | During screening to week 12 | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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VTX958, Harmony, Crohn's disease, TYK2