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GLPG3667

Phase 2

Dermatomyositis | Small molecule | Immunology |Lakefront Biotherapeutics|Trials Updated: May 14, 2026

GLPG3667 development status

Highest phase Phase 2
Registered trials 6 across 1 sponsor since Oct 2020

GLPG3667 target and mechanism

ModalitySmall molecule

Also known as GLPG3667 oral suspension, GLPG3667 capsule, [14C]-GLPG3667 solution for infusion, GLPG3667 for infusion, Cadefrecitinib

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLEDDMC
Total Trials3
Total Enrollment256

FDA Designations

No designations recorded

GLPG3667 clinical trials

GLPG3667 · 3 trials · 3 indications

Phase 2 2Phase 1 1
NCT05856448A Study Evaluating the Effects of GLPG3667 Administered as Oral Treatment in Adult Participants With Active Systemic Lupus ErythematosusSystemic Lupus Erythematosus
COMPLETED186 Analytics
NCT05695950A Study Evaluating the Effects of GLPG3667 Given as Oral Treatment for up to 24 Weeks in Adults With DermatomyositisDermatomyositis
COMPLETED40 Analytics
PHASE2COMPLETED
A Study Evaluating the Effects of GLPG3667 Administered as Oral Treatment in Adult Participants With Active Systemic Lupus Erythematosus
Systemic Lupus ErythematosusUnlock trial analytics
PHASE2COMPLETED
A Study Evaluating the Effects of GLPG3667 Given as Oral Treatment for up to 24 Weeks in Adults With Dermatomyositis
DermatomyositisUnlock trial analytics

Study Endpoints

Primary Endpoints

Percentage of Participants who Achieved the SLE Responder Index (SRI)-4 Response at Week 32
Week 32
Total improvement score [TIS] according to the American College of Rheumatology (ACR)/European League Against Rheumatism (EULAR) criteria
Week 24

The TIS is a score derived from the evaluation of the results from 6 core set measurements (CSMs) of myositis disease activity: Physician's Global Disease Activity Assessment; Patient's Global Disease Activity Assessment; Muscle Manual Test-8 (MMT-8); Health Assessment Questionnaire-Disability Index (HAQ-DI); Enzymes (aldolase, creatine kinase (CK), alanine aminotransferase (ALT), aspartate aminotransferase (AST), and lactate dehydrogenase (LDH); and Extra-muscular disease activity. The TIS is a scale from 0 to 100 that allows for the discrimination between minimal, moderate and major responders depending on their improvement in the combined 6 CSM.

Frequency and severity of treatment-emergent adverse events (TEAEs), treatment-emergent serious adverse events (SAEs), and TEAEs leading to treatment discontinuation in subjects with moderate to severe plaque psoriasis.
From screening through study completion, an average of 3 months

To evaluate the safety and tolerability of GLPG3667 compared to placebo in subjects with moderate to severe plaque psoriasis.

Psoriasis Area and Severity Index (PASI) % change
At week 4

To evaluate signs of clinical efficacy of GLPG3667 compared to placebo in subjects with moderate to severe plaque psoriasis.

Secondary Endpoints

Percentage of Participants who Achieved the SRI-4 Response at Week 48
Week 48
Percentage of Participants who Achieved the British Isles Lupus Assessment Group (BILAG)-Based Composite Lupus Assessment (BICLA) Response at Week 32 and Week 48
Week 32, Week 48
Percentage of Participants with >=50% Reduction in Cutaneous Lupus Erythematosus Disease Area and Severity Index Activity (CLASI-A) score at Week 32 and Week 48
Week 32, Week 48
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
GLPG3667 - Treatment AEXPERIMENTALParticipant will receive a dose A of GLPG3667 capsules orally once daily (q.d.) for 48 weeks.
GLPG3667 - Treatment BEXPERIMENTALParticipant will receive a dose B of GLPG3667 capsules orally (q.d.) for 48 weeks.
PlaceboPLACEBO_COMPARATORParticipant will receive placebo matched to GLPG3667 capsules orally q.d for 48 weeks.
GLPG3667 During DB + During OLEEXPERIMENTALParticipants will receive GLPG3667 dose A orally once daily for 24 weeks in the double-blind (DB) treatment period. Eligible participants will roll-over to an open-label extension (OLE) period to receive the same dose for another 24 weeks.
Placebo During DB + GLPG3667 During OLEPLACEBO_COMPARATORParticipants will receive placebo matching to GLPG3667 orally once daily for 24 weeks in the DB treatment period. Eligible participants will roll-over to an OLE period to receive GLPG3667 dose A orally once daily for another 24 weeks.
GLPG3667 Dose AEXPERIMENTALDaily doses of GLPG3667 for 4 weeks.
GLPG3667 Dose BEXPERIMENTALDaily doses of GLPG3667 for 4 weeks.

Interventions

NameTypeDescription
GLPG3667DRUGCapsule
PlaceboDRUGCapsule
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Eligibility Criteria

Age Range18 Years to 75 Years
SexALL
Healthy VolunteersNo
Study Sites84

Key Inclusion Criteria: 1. Participant with documented diagnosis of SLE as defined by the 2019 European League Against Rheumatism (EULAR)/American College of Rheumatology (ACR) classification criteria with a disease diagnosed ≥24 weeks before the screening visit. 2. Participant has a total Systemic...

Countries:United StatesArgentinaBulgariaChileFranceGeorgiaGermanyHungaryPeruPolandPuerto RicoSpainBelgiumColombiaCroatiaCzechiaItalyMexicoRomaniaUnited KingdomSlovakia
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Frequently asked questions about GLPG3667

What is GLPG3667?

GLPG3667 is an investigational oral small molecule developed by Lakefront Biotherapeutics (ticker LKFT) for immunology indications. It is being studied in dermatomyositis, plaque psoriasis, and systemic lupus erythematosus. It remains in clinical development and is not approved for any use.

What is GLPG3667 used for?

GLPG3667 is being studied for three immune-mediated conditions: systemic lupus erythematosus, dermatomyositis, and moderate to severe plaque psoriasis. Clinical testing has covered all three indications, with the largest study enrolling adults with active systemic lupus erythematosus.

Who makes GLPG3667?

Lakefront Biotherapeutics, which trades under the ticker LKFT, is the developer of GLPG3667. The company has sponsored Phase 1 and Phase 2 studies of the oral small molecule across dermatomyositis, plaque psoriasis, and systemic lupus erythematosus.

What phase is GLPG3667 in?

GLPG3667 is in Phase 2 development. A Phase 2 study in systemic lupus erythematosus and a Phase 2 study in dermatomyositis have both been completed, along with a Phase 1 study in plaque psoriasis. It is an investigational drug and has not been approved by the FDA.

What clinical trials is GLPG3667 in?

Three completed trials have evaluated GLPG3667: NCT05856448, a Phase 2 placebo-controlled study in 186 adults with active systemic lupus erythematosus; NCT05695950, a Phase 2 study in 40 adults with dermatomyositis; and NCT04594928, a Phase 1 study in 30 adults with moderate to severe plaque psoriasis.

Is GLPG3667 the same as GLPG3667 oral suspension or GLPG3667 capsule?

Yes. GLPG3667 oral suspension, GLPG3667 capsule, [14C]-GLPG3667 solution for infusion, and GLPG3667 for infusion are all names for the same investigational compound. They describe different formulations and administration forms used in its clinical studies, not separate drugs.