A Phase 2b Study to Evaluate RIST4721 in Palmoplantar Pustulosis (PPP)
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ClinicalTrials.gov Identifier: NCT05194839 |
Recruitment Status :
Recruiting
First Posted : January 18, 2022
Last Update Posted : May 9, 2022
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Condition or disease | Intervention/treatment | Phase |
---|---|---|
Palmoplantar Pustulosis | Drug: RIST4721 Drug: Placebo | Phase 2 |
Study Type : | Interventional (Clinical Trial) |
Estimated Enrollment : | 156 participants |
Allocation: | Randomized |
Intervention Model: | Parallel Assignment |
Masking: | Double (Participant, Investigator) |
Masking Description: | Double-blind |
Primary Purpose: | Treatment |
Official Title: | A Randomized, Double-blind, Placebo-controlled, Dose Ranging Phase 2 Study to Evaluate the Efficacy and Safety of RIST4721 in Subjects With Palmoplantar Pustulosis |
Actual Study Start Date : | January 5, 2022 |
Estimated Primary Completion Date : | April 30, 2023 |
Estimated Study Completion Date : | May 30, 2023 |

Arm | Intervention/treatment |
---|---|
Experimental: RIST4721 400 mg
RIST4721 400 mg: 4 active (100 mg) tablets once daily for 12 weeks
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Drug: RIST4721
RIST4721 tablets, 100 mg are blue, oval, biconvex film-coated tablets |
Experimental: RIST4721 200 mg
RIST4721 200 mg: 2 active (100 mg) tablets + 2 placebo tablets once daily for 12 weeks
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Drug: RIST4721
RIST4721 tablets, 100 mg are blue, oval, biconvex film-coated tablets Drug: Placebo Matching placebo |
Placebo Comparator: Placebo
Placebo: 4 placebo tablets once daily for 12 weeks
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Drug: Placebo
Matching placebo |
- Proportion of subjects achieving a 50% reduction in PPPASI score [ Time Frame: Baseline to Week 12 ]
- Absolute change from baseline in PPPGA [ Time Frame: Baseline to Week 12 ]
- Absolute change from baseline in PPPASI [ Time Frame: Baseline to Week 12 ]

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Ages Eligible for Study: | 18 Years to 74 Years (Adult, Older Adult) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | No |
Inclusion Criteria:
- At least 6 months history of moderate or severe PPP, as defined by PPPASI ≥12 and PPPGA ≥3 at screening
- Males and females must be willing to use birth control as indicated
Exclusion Criteria:
- Moderate to severe psoriasis covering ≥10% of total body surface area (BSA) at screening
- Breastfeeding or pregnant
- Known immunodeficiency or subject is immunocompromised
- Active/latent infection with HBV, HCV, HIV, SARS-CoV-2 or TB
- Any topical medications for PPP excluding emollients within two weeks of randomization and systemic therapies (including phototherapy) within 4 weeks of randomization

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT05194839
Contact: Aristea Therapeutics | 858-465-6142 | info@aristeatx.com |

Responsible Party: | Aristea Therapeutics, Inc. |
ClinicalTrials.gov Identifier: | NCT05194839 |
Other Study ID Numbers: |
RIST4721-202 |
First Posted: | January 18, 2022 Key Record Dates |
Last Update Posted: | May 9, 2022 |
Last Verified: | May 2022 |
Individual Participant Data (IPD) Sharing Statement: | |
Plan to Share IPD: | No |
Studies a U.S. FDA-regulated Drug Product: | Yes |
Studies a U.S. FDA-regulated Device Product: | No |
Psoriasis Skin Diseases, Papulosquamous Skin Diseases |