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Amlitelimab

Phase 3

Dermatitis Atopic | Small molecule | Dermatology |Sanofi|Last Updated: Jul 22, 2026

Success Probability
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Market & Valuation
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Trial Design
RandomizedDouble-BlindPLACEBO_CONTROLLEDDMC
Total Trials9
Total Enrollment6,919
FDA Designations
No designations recorded
Clinical trial landscape

Amlitelimab · 13 trials · 6 indications

Phase 3 5Phase 2 7Phase 1 1
NCT06407934A Study to Evaluate the Treatment Response and Safety of Two Dose Regimens of Subcutaneous Amlitelimab Compared With Treatment Withdrawal in Participants Aged 12 Years and Older With Moderate-to-severe Atopic DermatitisDermatitis Atopic
ACTIVE NOT_RECRUITING1,541 Analytics
NCT06241118A Study to Evaluate the Efficacy and Safety of Subcutaneous Amlitelimab on Background Topical Corticosteroids Therapy in Participants Aged 12 Years and Older With Moderate-to-severe AD Who Have Had an Inadequate Response to Prior Biologic Therapy or an Oral JAK InhibitorDermatitis Atopic
RECRUITING636 Analytics
NCT06224348A Study to Evaluate the Efficacy and Safety of Subcutaneous Amlitelimab in Participants Aged 12 Years and Older With Moderate-to-severe Atopic Dermatitis on Background Topical CorticosteroidsDermatitis Atopic
COMPLETED643 Analytics
NCT06181435A Study to Evaluate the Efficacy and Safety of Subcutaneous Amlitelimab Monotherapy Compared With Placebo in Participants Aged 12 Years and Older With Moderate-to-severe Atopic Dermatitis (COAST 2)Dermatitis Atopic
COMPLETED589 Analytics
NCT06130566A Study to Evaluate the Efficacy and Safety of Subcutaneous Amlitelimab Monotherapy Compared With Placebo in Participants Aged 12 Years and Older With Moderate-to-severe Atopic DermatitisDermatitis Atopic
COMPLETED601 Analytics
PHASE3ACTIVE NOT_RECRUITING
A Study to Evaluate the Treatment Response and Safety of Two Dose Regimens of Subcutaneous Amlitelimab Compared With Treatment Withdrawal in Participants Aged 12 Years and Older With Moderate-to-severe Atopic Dermatitis
Dermatitis AtopicUnlock trial analytics
PHASE3RECRUITING
A Study to Evaluate the Efficacy and Safety of Subcutaneous Amlitelimab on Background Topical Corticosteroids Therapy in Participants Aged 12 Years and Older With Moderate-to-severe AD Who Have Had an Inadequate Response to Prior Biologic Therapy or an Oral JAK Inhibitor
Dermatitis AtopicUnlock trial analytics
PHASE3COMPLETED
A Study to Evaluate the Efficacy and Safety of Subcutaneous Amlitelimab in Participants Aged 12 Years and Older With Moderate-to-severe Atopic Dermatitis on Background Topical Corticosteroids
Dermatitis AtopicUnlock trial analytics
PHASE3COMPLETED
A Study to Evaluate the Efficacy and Safety of Subcutaneous Amlitelimab Monotherapy Compared With Placebo in Participants Aged 12 Years and Older With Moderate-to-severe Atopic Dermatitis (COAST 2)
Dermatitis AtopicUnlock trial analytics
PHASE3COMPLETED
A Study to Evaluate the Efficacy and Safety of Subcutaneous Amlitelimab Monotherapy Compared With Placebo in Participants Aged 12 Years and Older With Moderate-to-severe Atopic Dermatitis
Dermatitis AtopicUnlock trial analytics
Study Endpoints
Primary Endpoints
US and US reference countries: Proportion of participants who are responders AND maintained vIGA-AD ≤2 without experiencing relapse among participants who were responders at baseline of ESTUARY
Week 24

Clinical response is defined as having vIGA-AD 0 or 1. Relapse is defined as having vIGA-AD ≥3 or loss of EASI-75\^. The validated Investigator Global Assessment scale for atopic dermatitis (vIGA-AD) is an Investigator-completed assessment scale used to determine severity of AD and clinical response to treatment. It is based on a 5-point scale, ranging from 0 (clear) to 4 (severe). The Eczema Area and Severity Index (EASI) is an Investigator-assessed validated tool used to measure the extent (area) and severity of AD. Total score ranges from 0 to 72 with a higher score indicating increased extent and severity of AD. EASI-75 is 75% reduction from baseline in EASI score. The symbol \^ represents "based on parent study baseline".

EU, EU Reference Countries, and Japan: Proportion of participants who maintain treatment response in ESTUARY without experiencing relapse
Week 48

Maintenance of clinical response is defined as having vIGA-AD 0 or 1 OR EASI-75\^ OR vIGA-AD 0 or 1 and EASI-75\^. Relapse is defined as having vIGA-AD ≥3 or loss of EASI-75\^ The vIGA-AD is an Investigator-completed assessment scale used to determine severity of AD and clinical response to treatment. It is based on a 5-point scale, ranging from 0 (clear) to 4 (severe). The EASI is an Investigator-assessed validated tool used to measure the extent (area) and severity of AD. Total score ranges from 0 to 72 with a higher score indicating increased extent and severity of AD. EASI-75 is 75% reduction from baseline in EASI score. The symbol \^ represents "based on parent study baseline".

EU, EU reference countries, and Japan: Proportion of participants with Validated Investigator Global Assessment scale for Atopic Dermatitis (vIGA-AD) of 0 (clear) or 1 (almost clear) and a reduction from baseline of ≥2 points at Week 36
Week 36

The vIGA-AD is an Investigator-completed assessment scale used to determine severity of AD and clinical response to treatment. It is based on a 5-point scale, ranging from 0 (clear) to 4 (severe).

EU, EU reference countries, and Japan: Proportion of participants reaching 75% reduction from baseline in Eczema Area and Severity Index (EASI) score (EASI75) at Week 36
Week 36

The EASI is an Investigator-assessed validated tool used to measure the extent (area) and severity of AD. Total score ranges from 0 to 72 with a higher score indicating increased extent and severity of AD.

US and US reference countries: Proportion of participants with vIGA-AD of 0 (clear) or 1 (almost clear) and a reduction from baseline of ≥2 points at Week 36
Week 36

The vIGA-AD is an Investigator-completed assessment scale used to determine severity of AD and clinical response to treatment. It is based on a 5-point scale, ranging from 0 (clear) to 4 (severe).

EU, EU reference countries, and Japan: Proportion of participants with Validated Investigator Global Assessment scale for Atopic Dermatitis (vIGA-AD) of 0 (clear) or 1 (almost clear) and a reduction from baseline of ≥2 points at Week 24
Week 24

The vIGA-AD is an Investigator-completed assessment scale used to determine severity of AD and clinical response to treatment. It is based on a 5-point scale, ranging from 0 (clear) to 4 (severe).

EU, EU reference countries, and Japan: Proportion of participants reaching 75% reduction from baseline in Eczema Area and Severity Index (EASI) score (EASI-75) at Week 24
Week 24

The EASI is an Investigator-assessed validated tool used to measure the extent (area) and severity of AD. Total score ranges from 0 to 72 with a higher score indicating increased extent and severity of AD.

US and US reference countries: Proportion of participants with vIGA-AD of 0 (clear) or 1 (almost clear) and a reduction from baseline of ≥2 points at Week 24
Week 24

The vIGA-AD is an Investigator-completed assessment scale used to determine severity of AD and clinical response to treatment. It is based on a 5-point scale, ranging from 0 (clear) to 4 (severe).

Percentage Change in EASI (Eczema Area and Severity Index) From Baseline to Week 16 (Part 1)
Baseline to week 16

Eczema Area and Severity Index-The EASI is an Investigator-assessed validated tool used to measure the extent (area) and severity of AD with scores from 0 to 72. Higher scores indicate worse condition.

Change in Villus Height to Crypt Depth Ratio (Vh:Cd) from baseline to Week 28
Baseline to Week 28

Change in Vh:Cd ratio.

Percentage of participants with a positive tetanus response at Week 16
Week 16

Positive tetanus response is defined as ≥2.5 IU/mL in anti-tetanus immunoglobulin G \[IgG\] titer for participants with a pre-vaccination baseline \[Week 12\] tetanus antibody titer of \>1 IU/mL or a titer ≥ 3-fold increase for participants with a pre-vaccination titer of ≤1 IU/mL).

Percentage of participants with treatment-emergent adverse events
From baseline up to Week 156 (EOS of LTS17510)

Percentage of participants with treatment emergent Adverse Events.

Percentage of participants who experienced Treatment-Emergent Adverse Events (TEAEs)
Baseline up to end of study (EOS) (Week 284)

Percentage of participants who experienced TEAEs from baseline during the study

Percentage of participants who experienced Treatment-Emergent Serious Adverse Events (TESAEs)
Baseline up to EOS (Week 284)

Percentage of participants who experienced TESAEs from baseline during the study

Percentage of participants who experienced treatment-emergent adverse event (TEAE)
Baseline to Week 332
Annualized Rate of Severe Asthma Exacerbation Events Over 48 Weeks
Baseline (Day 1) to Week 48

Severe asthma exacerbation event was defined as worsening of asthma requiring the use of systemic corticosteroids for \>=3 days or, in the case of a stable maintenance regimen of oral corticosteroids (OCS) for the treatment of asthma, a doubling of the dose for 3 or more days, or hospitalization or emergency room visit because of asthma requiring systemic corticosteroids. Annualized rate was the total number of severe asthma exacerbation events divided by the total observation duration and was estimated based on negative binomial regression.

AUC and AUClast for CYP substrates
Baseline (Day 1 to Day 8) and Day 176 to Day 183

AUC = area under the serum/plasma concentration curve; AUClast = area under the plasma concentration versus time curve calculated using the trapezoidal method from time zero to the real time tlast.

Secondary Endpoints
Proportion of participants who continue to be EASI-75^ among the participants who met EASI-75^ at baseline of ESTUARY
Up to Week 48
Proportion of participants who continue to be vIGA-AD 0 or 1 among participants who met vIGA-AD 0 or 1 at baseline of ESTUARY
Up to Week 48
Proportion of participants who continue to be vIGA-AD 0 or 1 with presence of only barely perceptible erythema among the participants who were vIGA-AD 0 or 1 with presence of only barely perceptible erythema at baseline of ESTUARY
Up to Week 48
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Study Design & Arms
AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Amlitelimab dose 1EXPERIMENTALSubcutaneous injection as per protocol
Amlitelimab dose 2EXPERIMENTALSubcutaneous injection as per protocol
PlaceboPLACEBO_COMPARATORSubcutaneous injection as per protocol
250mg (500mg Loading Dose) KY1005EXPERIMENTALEvery 4 weeks
250mg (No Loading Dose) KY1005EXPERIMENTALEvery 4 weeks
125mg KY1005EXPERIMENTALEvery 4 weeks
62.5mg KY1005EXPERIMENTALEvery 4 weeks
Amlitelimab dose 1 + Gluten-free product (GFP)EXPERIMENTALAmlitelimab SC as per protocol + GFP
Amlitelimab dose 2 + GFPEXPERIMENTALAmlitelimab SC as per protocol + GFP
Amlitelimab dose 3 + GFPEXPERIMENTALAmlitelimab SC as per protocol + GFP
Amlitelimab dose 1 + SIGEEXPERIMENTALAmlitelimab SC as per protocol + SIGE
Placebo + GFPPLACEBO_COMPARATORPlacebo SC as per protocol + GFP
Placebo + SIGEPLACEBO_COMPARATORPlacebo SC as per protocol + SIGE
AmlitelimabEXPERIMENTALParticipants will receive amlitelimab and vaccines as per protocol.
Treatment group 1EXPERIMENTALSubcutaneous Injection as per protocol
Treatment group 2EXPERIMENTALSubcutaneous injection as per protocol
Amlitelimab dose level 1EXPERIMENTALSubcutaneous injection as per protocol
Amlitelimab dose level 2EXPERIMENTALSubcutaneous injection as per protocol
Amlitelimab 62.5 mg With 125 mg Loading DoseEXPERIMENTALParticipants received amlitelimab SC injection at an initial loading dose of 125 mg on Day 1 followed by amlitelimab 62.5 mg SC injection Q4W until Week 20 (inclusive) and Q12W starting from Week 24 until Week 48.
Amlitelimab 125 mg With 250 mg Loading DoseEXPERIMENTALParticipants received amlitelimab SC injection at an initial loading dose of 250 mg on Day 1 followed by amlitelimab 125 mg SC injection Q4W until Week 20 (inclusive) and Q12W starting from Week 24 until Week 48.
Amlitelimab 250 mg With 500 mg Loading DoseEXPERIMENTALParticipants received amlitelimab SC injection at an initial loading dose of 500 mg on Day 1 followed by amlitelimab 250 mg SC injection Q4W until Week 20 (inclusive) and Q12W starting from Week 24 until Week 48.
Amlitelimab and CYP substratesEXPERIMENTALA single oral dose of a CYP450 substrates cocktail which will include caffeine, metoprolol, midazolam, omeprazole, and warfarin will be administered. A single dose of amlitelimab will then be administered on several days. A single oral dose of CYP450 substrates cocktail in combination with the last single dose of amlitelimab.
Interventions
NameTypeDescription
AmlitelimabDRUGPharmaceutical form: Injection solution Route of administration: Subcutaneous (SC) injection
PlaceboDRUGPharmaceutical form: Injection solution Route of administration: SC injection
Topical corticosteroidsDRUGPharmaceutical form: Various Topical formulation Route of administration: Topical
Topical tacrolimus or pimecrolimusDRUGPharmaceutical form: Various Topical formulation Route of administration: Topical
Topical calcineurin inhibitorsDRUGPharmaceutical form: Topical formulation Route of administration: Topical
SIGEDIETARY_SUPPLEMENTPharmaceutical form: Capsule Route of administration: Oral
Gluten-free product (GFP)DIETARY_SUPPLEMENTPharmaceutical form: Capsule Route of administration: Oral
Tdap vaccineBIOLOGICALIntramuscular (IM) injection into the deltoid muscle of the upper arm
PPS vaccineBIOLOGICALIntramuscular or subcutaneous injection into the deltoid muscle of the upper arm
Oral corticosteroidsDRUGPharmaceutical form: Oral Route of administration: Oral
MidazolamDRUGPharmaceutical form: Solution Route of administration: Oral
CaffeineDRUGPharmaceutical form: Tablet Route of administration: Oral
MetoprololDRUGPharmaceutical form: Tablet Route of administration: Oral
OmeprazoleDRUGPharmaceutical form: Capsule Route of administration: Oral
WarfarinDRUGPharmaceutical form: Tablet Route of administration: Oral
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Eligibility Criteria
Age Range12 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites324

Inclusion Criteria: * Participants must be at least 12 years of age inclusive, at the time the informed consent is signed. * Must have participated, received study treatment without permanent investigational medicinal product (IMP) discontinuation, and adequately completed the assessments required ...

Countries:United StatesArgentinaAustraliaBrazilBulgariaCanadaChileChinaCzechiaDenmarkFranceGermanyGreeceIndiaIsraelItalyJapanMexicoPolandPortugalSouth AfricaSouth KoreaSpainSwedenTaiwanTurkey (Türkiye)United KingdomReunionSaudi ArabiaUnited Arab EmiratesHungaryBelgiumFinlandNetherlandsSlovakiaPuerto RicoSwitzerland
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Recent Changes (Last 90 Days)
LOWJul 10, 2026NCT06407934primaryCompletionDate: changed
LOWJul 10, 2026NCT06407934primaryCompletionDate: changed
LOWJul 2, 2026NCT06241118lastUpdatePostDate: changed
LOWJul 2, 2026NCT05492578lastUpdatePostDate: changed
LOWJul 2, 2026NCT06241118lastUpdatePostDate: changed
LOWJul 2, 2026NCT05492578lastUpdatePostDate: changed
LOWJul 2, 2026NCT06241118lastUpdatePostDate: changed
LOWJul 2, 2026NCT05492578lastUpdatePostDate: changed
LOWJun 5, 2026NCT06241118lastUpdatePostDate: changed
LOWJun 5, 2026NCT06241118lastUpdatePostDate: changed
LOWJun 5, 2026NCT06241118lastUpdatePostDate: changed
LOWJun 5, 2026NCT06241118lastUpdatePostDate: changed
LOWJun 3, 2026NCT05492578lastUpdatePostDate: changed
LOWJun 3, 2026NCT05492578lastUpdatePostDate: changed
MEDIUMMay 26, 2026NCT06686628TRIAL_REMOVED: changed
MEDIUMMay 26, 2026NCT06241118Enrollment: 390 → 636
LOWMay 26, 2026NCT05492578primaryCompletionDate: changed
LOWMay 26, 2026NCT06557772primaryCompletionDate: changed