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Izokibep

Phase 2

Hidradenitis Suppurativa | Small molecule | Dermatology |ACELYRIN, INC.|Last Updated: Jun 3, 2025

Success Probability

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLEDDMC
Total Trials1
Total Enrollment205

FDA Designations

No designations recorded

Clinical trial landscape

Izokibep · 2 trials · 2 indications

Phase 2 2
NCT05355805Hidradenitis Suppurativa Phase 2b Study of IzokibepHidradenitis Suppurativa
COMPLETED205 Analytics
NCT04706741A Trial of the Efficacy and Safety of Izokibep in the Treatment of Non-anterior UveitisUveitis
COMPLETED7 Analytics
PHASE2COMPLETED
Hidradenitis Suppurativa Phase 2b Study of Izokibep
Hidradenitis SuppurativaUnlock trial analytics
PHASE2COMPLETED
A Trial of the Efficacy and Safety of Izokibep in the Treatment of Non-anterior Uveitis
UveitisUnlock trial analytics

Study Endpoints

Primary Endpoints

Part A: Number of Participants Who Achieved Hidradenitis Suppurativa Clinical Response 75 (HiSCR75) at Week 12
Part A: Baseline to Week 12

HiSCR75 was defined as at least a 75% reduction from baseline in the total abscess and inflammatory nodule count, with no increase from baseline in abscess or draining fistula count.

Part B: Number of Participants Who Achieved HiSCR75 at Week 16
Part B: Baseline to Week 16

HiSCR75 was defined as at least a 75% reduction from baseline in the total abscess and inflammatory nodule count, with no increase from baseline in abscess or draining fistula count.

Complete Response
BL to Week 10

Complete Response is defined as Yes/No by visit by meeting at least 1 of the following criteria in at least one eye: 1. Inflammatory, chorioretinal and/or inflammatory retinal vascular lesions - No such active lesions; all prior lesions appear inactive 2. ACC Count - Trace or absent (0.5+ or 0) 3. Vitreous Haze - Trace or absent (0.5+ or 0)

Secondary Endpoints

Part A: Number of Participants With Treatment-emergent Adverse Events (TEAEs)
Part A: Screening (Day -28) to Follow-up (Week 45), for a total of 49 weeks
Part A: Number of Participants Testing Positive for Anti-drug Antibodies (ADAs)
Baseline, Week 16, Week 32, Week 39
Part B: Number of Participants Who Achieved HiSCR90 at Week 16
Part B: Baseline to Week 16
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Study Design & Arms

AllocationRANDOMIZED
MaskingDOUBLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Part A (Open-label) izokibep every weekEXPERIMENTALParticipants will receive izokibep every week from Day 1 through Week 31
Part B (Double-blind) izokibep every weekEXPERIMENTALParticipants will receive izokibep every week for 31 weeks.
Part B (Double-blind) izokibep every other weekEXPERIMENTALParticipants will receive izokibep every other week for 30 weeks.
Part B (Double-blind) placebo every weekPLACEBO_COMPARATORParticipants will receive placebo every week up to Week 15, then izokibep from Week 16 to Week 31.
Part B (Double-blind) placebo every other weekPLACEBO_COMPARATORParticipants will receive placebo every other week up to Week 14, then izokibep from Week 16 to Week 30.
Izokibep and maintenance corticosteroid doseEXPERIMENTALIzokibep+ Prednisolon/Prednisone

Interventions

NameTypeDescription
IzokibepDRUGBiologic: IL-17A inhibitor Form: Solution for injection Route of administration: Subcutaneous (SC)
Placebo to izokibepDRUGForm: Solution for injection Route of administration: Subcutaneous (SC)
Prednisone/PrednisoloneDRUGBackground Corticosteroid
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Eligibility Criteria

Age Range18 Years to 75 Years
SexALL
Healthy VolunteersNo
Study Sites44

Inclusion Criteria: General * Subject has provided signed informed consent including consenting to comply with the requirements and restrictions listed in the informed consent form (ICF) and in this protocol. * 18 years to 75 years of age Type of Subject and Disease Characteristics * Diagnosis o...

Countries:United StatesCanadaGermanyHungaryPolandSpain
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Frequently asked questions about Izokibep

What is Izokibep used for?

Izokibep is an investigational drug being studied for the treatment of hidradenitis suppurativa and uveitis. It is currently in Phase 2 clinical development for these conditions. Izokibep is being developed by ACELYRIN, INC. (ticker: SLRN).

Who makes Izokibep?

Izokibep is being developed by ACELYRIN, INC., a biopharmaceutical company. The company's stock ticker is SLRN. Izokibep is an investigational small molecule being studied for hidradenitis suppurativa and uveitis.

What phase is Izokibep in?

Izokibep is in Phase 2 clinical development. It has completed two Phase 2 trials, one in non-anterior uveitis and one in hidradenitis suppurativa. Izokibep is investigational and has not been approved by regulatory authorities.

What clinical trials is Izokibep in?

Izokibep has completed two Phase 2 clinical trials. NCT04706741 studied Izokibep in non-anterior uveitis with 7 participants in the United States. NCT05355805 studied Izokibep in hidradenitis suppurativa with 205 participants across the United States, Canada, Germany, Hungary, Poland, and Spain.

Is Izokibep FDA approved?

Izokibep is not FDA approved. It is an investigational drug currently in Phase 2 clinical development for hidradenitis suppurativa and uveitis. The completed trials include a placebo-controlled study in hidradenitis suppurativa and a study in non-anterior uveitis.