VTX958 Versus Placebo for the Treatment of Moderate to Severe Psoriasis

Study Overview
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Brief Summary
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This is a study to understand if taking VTX958 is safe and effective in participants diagnosed with moderate to severe psoriasis (PsO). Approximately 200 patients will take VTX958 Dose A, VTX958 Dose B, VTX958 Dose C, VTX958 Dose D, or placebo. The study consists of a 30-day Screening Period (to see if a participant qualifies for the study), a 16-week double-blind period (a participant receives active Dose A, Dose B, Dose C, Dose D, or placebo), a 16-week Long Term Extension (LTE) period, a 36-week Open Label Extension (OLE) period and a 4-week Follow-Up Period. The maximal duration of treatment will be 17 months.

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 Moderate to Severe Psoriasis

Conditions
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Psoriasis

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


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Male or female participant aged 18 years or older. History of primarily plaque psoriasis for at least 6 months prior to the screening visit. Has had stable psoriasis conditions for at least 3 months before screening. Has moderate to severe plaque psoriasis as defined by a PASI score of ≥ 12 and an sPGA score of ≥ 3 at screening and Day 1. Has plaque psoriasis covering ≥ 10% of the total BSA at screening and Day 1. Deemed by the investigator to be eligible for phototherapy or systemic therapy. Females of childbearing potential must agree to use a highly effective contraceptive method from at least 4 weeks prior to Day 1 until at least 4 weeks after the last dose of study product. Exclusion Criteria: Female who is breastfeeding, pregnant, lactating, or who is planning to become pregnant during the study. Has evidence of erythrodermic, pustular, predominantly inverse or guttate psoriasis, or drug-induced psoriasis. History of skin disease or presence of skin condition that, in the opinion of the investigator, would interfere with the study assessments. Participant is known to have immune deficiency or is immunocompromised. Has immune-mediated conditions commonly associated with psoriasis, such as psoriatic arthritis, active uveitis, inflammatory bowel disease, that currently require systemic treatment (including corticosteroids, immunosuppressants, or biologics). Note: Participants with immune-mediated conditions commonly associated with psoriasis that do not require systemic treatment may be included in the study. Has used any topical medication that could affect psoriasis (including corticosteroids, retinoids, vitamin D analogues [such as calcipotriol], Janus kinase [JAK] inhibitors, or tar) within 2 weeks prior to Day 1. Has used any systemic treatment that could affect psoriasis (including corticosteroids, oral retinoids, immunosuppressive medication, anakinra, methotrexate, cyclosporine, oral JAK inhibitors, or apremilast) within 4 weeks prior to Day 1. Note: Intranasal corticosteroids and inhaled corticosteroids are allowed. Eye and ear drops containing corticosteroids are also allowed. Participant has received any ultraviolet B (UVB) phototherapy (including tanning beds) or excimer laser within 4 weeks prior to Day 1. Participant has had psoralen and ultraviolet A (PUVA) treatment within 4 weeks prior to Day 1. Participant has received treatment with an investigational or marketed TYK2 inhibitor.

Ages Eligible for Study
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Minimum Age: 18 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<br>|
| Experimental: VTX958 Dose B<br> | Drug: VTX958<br>* Dose B<br>|
| Experimental: VTX958 Dose C<br> | Drug: VTX958<br>* Dose C<br>|
| Experimental: VTX958 Dose D<br> | Drug: VTX958<br>* Dose D<br>|
| Placebo Comparator: Placebo<br> | Drug: Placebo<br>* Placebo<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Psoriasis Area and Severity Index (PASI) Efficacy at 16 weeks | Proportion of subjects achieving PASI-75 at Week 16 | Day 1 of Placebo-controlled treatment period to week 16 | 
| Adverse Event (AE) / Serious Adverse Event (SAE) Incidence Rate through study completion | Incidence of AEs and SAEs | Screening through study completion, up to 76 weeks | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Static Physician's Global Assessment (sPGA) Efficacy at 16 weeks | Proportion of participants achieving a sPGA score of 0 (clear) or 1 (almost clear) at Week 16 | Day 1 of Placebo-controlled treatment period to week 16 | 
| PASI Efficacy at 16 weeks | Change and percent change from baseline in PASI at Week 16 | Day 1 of Placebo-controlled treatment period to week 16 | 
| PASI Efficacy at 16 weeks | Proportion of participants achieving PASI-90 at Week 16 | Day 1 of Placebo-controlled treatment period to week 16 | 
| PASI Efficacy at 16 weeks | Proportion of participants achieving PASI-100 at Week 16 | Day 1 of Placebo-controlled treatment period to week 16 | 
| Dermatology Life Quality Index (DLQI) Efficacy at 16 weeks | Change from baseline in DLQI scores at Week 16 | Day 1 of Placebo-controlled treatment period to week 16 | 
| Body Surface Area (BSA) Efficacy at 16 weeks | Change from baseline in BSA at Week 16 | Day 1 of Placebo-controlled treatment period to week 16 | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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TYK2 inhibitor, moderate to severe psoriasis, Ventyx, VTX958