A Study of SL-325 in Participants With Hidradenitis Suppurativa

November 6, 2026 updated by: Shattuck Labs, Inc.

A Phase 2 Randomized, Double-blind, Placebo-controlled Study to Evaluate the Efficacy and Safety of SL-325 in Participants With Moderate to Severe Hidradenitis Suppurativa (RECEPTIVE-HS1)

The primary purpose of this study is to evaluate the efficacy of SL-325 in adult participants with Hidradenitis Suppurativa.

The study consists of a screening period of up to 5 weeks, a 16-week primary treatment period, 36-week extension period, and a follow-up period of up to 12 weeks.

Study Overview

Status

Not yet recruiting

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Estimated)

150

Phase

  • Phase 2

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • A clinical diagnosis of HS at Screening as assessed by the Investigator.
  • Signs and symptoms of HS for ≥6 months prior to Screening.
  • ≥5 total AN count.
  • HS lesions present in ≥2 distinct anatomical areas.
  • ≥1 anatomic area of HS involvement characterized as Hurley Stage II or III.
  • Draining tunnel count of ≤20.
  • Inadequate response or recurrence of disease activity after an appropriate course of systemic antibiotics for the treatment of HS OR intolerance or contraindication to systemic antibiotics for the treatment of HS.

Exclusion Criteria:

  • Evidence of other active skin disease or condition that could, in the Investigator's opinion, interfere with the evaluation of HS.
  • Prior exposure to any anti-DR3 or anti-TL1A agent or agent with an anti-DR3 or anti-TL1A component.
  • Active tuberculosis (TB) or inadequately treated latent tuberculosis infection (LTBI)

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Quadruple

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Placebo Comparator: Placebo
Drug: Placebo

Placebo administered intravenously
Experimental: SL-325 high dose
Drug: SL-325

SL-325 administered intravenously
Experimental: SL-325 low dose
Drug: SL-325

SL-325 administered intravenously

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Proportion of participants achieving HiSCR50
Time Frame: Week 16

The proportion of participants achieving HiSCR50, defined as a ≥50% reduction in total AN count, with no increase in abscess count and no increase in draining tunnel count, relative to baseline.
Week 16

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Proportion of participants achieving HiSCR75
Time Frame: Week 16

The proportion of participants achieving HiSCR75, defined as a ≥75% reduction in the total AN count, with no increase in abscess count and no increase in draining tunnel count, relative to baseline.
Week 16
Incidence and severity of treatment-emergent adverse events
Time Frame: Week 16

Incidence and severity of treatment-emergent adverse events (TEAEs)
Week 16
Number of participants who discontinue study intervention due to an TEAE
Time Frame: Week 16

Treatment-emergent adverse events (TEAEs) leading to discontinuation of study intervention
Week 16

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Shattuck Labs, Inc.

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

January 1, 2027

Primary Completion (Estimated)

February 1, 2028

Study Completion (Estimated)

December 1, 2028

Study Registration Dates

First Submitted

November 6, 2026

First Submitted That Met QC Criteria

November 6, 2026

First Posted (Actual)

November 12, 2026

Study Record Updates

Last Update Posted (Actual)

November 12, 2026

Last Update Submitted That Met QC Criteria

November 6, 2026

Last Verified

November 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • SL-325-202

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Plan Description

Anonymized individual patient level data will be provided in a secure access environment upon approval of a research proposal and a signed data sharing agreement. Proposals will be reviewed based on scientific need, conflicts of interest, and regulatory approval status.

IPD Sharing Supporting Information Type

  • STUDY_PROTOCOL
  • SAP

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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