Hidradenitis Suppurativa Study of Izokibep

NCT ID: NCT05905783

Last Updated: 2025-10-15

Study Results

Results available

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Basic Information

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Recruitment Status

TERMINATED

Clinical Phase

PHASE3

Total Enrollment

258 participants

Study Classification

INTERVENTIONAL

Study Start Date

2023-06-22

Study Completion Date

2025-01-27

Brief Summary

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Izokibep is a small protein molecule that acts as a selective, potent inhibitor of interleukin 17A, to which it binds with high affinity. This study investigates izokibep in participants with active Hidradenitis Suppurativa (HS), including tumor necrosis factor-alpha inhibitor (TNFi) naïve participants, and those who had an inadequate response or intolerance to TNFi, or for whom TNFi is contraindicated.

Detailed Description

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Conditions

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Hidradenitis Suppurativa

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

DOUBLE

Participants Investigators

Study Groups

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Group 1

Participants will receive placebo as a subcutaneous (SC) injection every week (QW) from Day 1 to Week 15. Participants will then receive izokibep as a SC injection QW from Week 16 to Week 51.

Group Type EXPERIMENTAL

Placebo

Intervention Type DRUG

Solution for injection

Izokibep

Intervention Type DRUG

Solution for injection

Group 2

Participants will receive izokibep QW from Day 1 to Week 51.

Group Type EXPERIMENTAL

Izokibep

Intervention Type DRUG

Solution for injection

Interventions

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Placebo

Solution for injection

Intervention Type DRUG

Izokibep

Solution for injection

Intervention Type DRUG

Eligibility Criteria

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Inclusion Criteria

General

* Participant has provided signed informed consent including consenting to comply with the requirements and restrictions listed in the informed consent form (ICF) and in protocol
* 18 years of age or older
* No known history of active tuberculosis unless adequately treated according to World Health Organization/Center for Disease Control and Prevention therapeutic guidance and determined to be fully recovered by a tuberculosis specialist

Type of Participant and Disease Characteristics

* Diagnosis of HS for ≥ 6 months prior to first dose of study drug
* Hidradenitis suppurativa lesions present in ≥ 2 distinct anatomic areas, one of which is Hurley Stage II or Hurley Stage III
* A total AN count of ≥ 5 at screening and Day 1 prior to enrollment/randomization
* Participant must have had an inadequate response to oral antibiotics OR exhibited recurrence after discontinuation to, OR demonstrated intolerance to, OR have a contraindication to oral antibiotics for treatment of their HS
* Must agree to use daily or a minimum of 3 days a week over-the-counter topical antiseptics
* Participant must be willing to complete a daily skin pain diary

Exclusion Criteria

Medical Conditions

* Draining fistula count of \> 20
* Outpatient surgery ≤ 8 weeks prior or inpatient surgery ≤ 12 weeks prior to enrollment/randomization
* Other active skin disease or condition that could interfere with study assessments
* History of active inflammatory bowel disease (IBD) OR symptoms within the last year that may be suggestive of IBD
* Chronic pain not associated with HS
* Uncontrolled, clinically significant system disease
* History of demyelinating disease or neurological symptoms suggestive of demyelinating disease
* Malignancy within 5 years
* The participant is at risk of self-harm or harm to others
* Active infection or history of certain infections
* Tuberculosis or fungal infection seen on available chest x-ray taken within 3 months prior to first dose of study drug or at screening (Exception: documented evidence of completed treatment and clinically resolved)
* Known history of human immunodeficiency virus (HIV)
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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ACELYRIN Inc.

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Shephard Mpofu

Role: STUDY_DIRECTOR

ACELYRIN Inc.

Locations

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Clinical Research Site

Birmingham, Alabama, United States

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Scottsdale, Arizona, United States

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Scottsdale, Arizona, United States

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Fayetteville, Arkansas, United States

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Encino, California, United States

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Fountain Valley, California, United States

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Fremont, California, United States

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Los Angeles, California, United States

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Santa Monica, California, United States

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Boca Raton, Florida, United States

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Brandon, Florida, United States

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Coral Gables, Florida, United States

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Hollywood, Florida, United States

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Tampa, Florida, United States

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Tampa, Florida, United States

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Atlanta, Georgia, United States

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Sandy Springs, Georgia, United States

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Savannah, Georgia, United States

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Springfield, Illinois, United States

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Indianapolis, Indiana, United States

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Plainfield, Indiana, United States

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Topeka, Kansas, United States

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Murray, Kentucky, United States

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Baton Rouge, Louisiana, United States

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Baton Rouge, Louisiana, United States

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New Orleans, Louisiana, United States

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Largo, Maryland, United States

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Boston, Massachusetts, United States

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Canton, Michigan, United States

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Troy, Michigan, United States

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Lebanon, New Hampshire, United States

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New York, New York, United States

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Charlotte, North Carolina, United States

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Boardman, Ohio, United States

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Mason, Ohio, United States

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Springfield, Ohio, United States

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Portland, Oregon, United States

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Hershey, Pennsylvania, United States

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Pittsburgh, Pennsylvania, United States

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Sugarloaf, Pennsylvania, United States

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Thompson's Station, Tennessee, United States

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Arlington, Texas, United States

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Frisco, Texas, United States

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Pflugerville, Texas, United States

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San Antonio, Texas, United States

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The Woodlands, Texas, United States

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Webster, Texas, United States

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Springville, Utah, United States

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West Jordan, Utah, United States

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Charlottesville, Virginia, United States

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Edmonton, Alberta, Canada

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Edmonton, Alberta, Canada

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Winnipeg, Manitoba, Canada

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North Bay, Ontario, Canada

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Peterborough, Ontario, Canada

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Toronto, Ontario, Canada

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Toronto, Ontario, Canada

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Toronto, Ontario, Canada

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Waterloo, Ontario, Canada

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Saskatoon, Saskatchewan, Canada

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Dijon, Bourgogne-Franche-Comté, France

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Montpellier, Occitanie, France

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Nantes, Pays de la Loire Region, France

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Toulon, , France

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Darmstadt, Hesse, Germany

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Bad Bentheim, Lower Saxony, Germany

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Mainz, Rhineland-Palatinate, Germany

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Leipzig, Saxony, Germany

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Kiel, Schleswig-Holstein, Germany

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Debrecen, Hajdú-Bihar, Hungary

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Zalaegerszeg, Zala County, Hungary

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Budapest, , Hungary

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Fukuoka, Fukoka Prefecture, Japan

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Kitakyushu, Fukuoka, Japan

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Obihiro, Hokkaido Prefecture, Japan

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Sapporo, Hokkaido Prefecture, Japan

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Kawasaki, Kanagawa, Japan

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Yokohama, Kanagawa, Japan

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Kyoto, Kyoto, Japan

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Osaka, Osaka, Japan

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Shinjuku-Ku, Tokyo, Japan

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tabashi City, Tokyo, Japan

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Nishinomiya, , Japan

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Krakow, Lesser Poland Voivodeship, Poland

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Krakow, Lesser Poland Voivodeship, Poland

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Wroclaw, Lower Silesian Voivodeship, Poland

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Wroclaw, Lower Silesian Voivodeship, Poland

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Lublin, Lublin Voivodeship, Poland

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Katowice, Silesian Voivodeship, Poland

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Ożarowice, Silesian Voivodeship, Poland

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Sosnowiec, Silesian Voivodeship, Poland

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Lodz, Łódź Voivodeship, Poland

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Seville, Andalusia, Spain

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Palma de Mallorca, Balearic Islands, Spain

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Badalona, Catalonia, Spain

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Barcelona, Catalonia, Spain

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Manises, Valencia, Spain

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Madrid, , Spain

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Countries

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United States Canada France Germany Hungary Japan Poland Spain

Provided Documents

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Document Type: Study Protocol

View Document

Document Type: Statistical Analysis Plan

View Document

Other Identifiers

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2022-503160-33-00

Identifier Type: OTHER

Identifier Source: secondary_id

22107

Identifier Type: -

Identifier Source: org_study_id

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