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Rezpegaldesleukin

Phase 3

Moderate-to-Severe Atopic Dermatitis | Small molecule | Dermatology |Nektar Therapeutics|Last Updated: Aug 21, 2026

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLEDDMC
Total Trials2
Total Enrollment1,020

FDA Designations

FAST_TRACK

Clinical trial landscape

Rezpegaldesleukin · 4 trials · 3 indications

Phase 3 2Phase 2 2
NCT07711418A Phase 3 Study of Rezpegaldesleukin (NKTR-358) for Patients ≥ 12 Years of Age With Moderate-to-Severe Atopic DermatitisModerate-to-Severe Atopic Dermatitis
RECRUITING510 Analytics
NCT07690371A Phase 3 Study of Rezpegaldesleukin (NKTR-358) for Patients ≥ 12 Years of Age With Moderate-to-Severe Atopic DermatitisModerate-to-Severe Atopic Dermatitis
RECRUITING510 Analytics
PHASE3RECRUITING
A Phase 3 Study of Rezpegaldesleukin (NKTR-358) for Patients ≥ 12 Years of Age With Moderate-to-Severe Atopic Dermatitis
Moderate-to-Severe Atopic DermatitisUnlock trial analytics
PHASE3RECRUITING
A Phase 3 Study of Rezpegaldesleukin (NKTR-358) for Patients ≥ 12 Years of Age With Moderate-to-Severe Atopic Dermatitis
Moderate-to-Severe Atopic DermatitisUnlock trial analytics

Study Endpoints

Primary Endpoints

US only: Number of participants with an Investigator's Global Assessment (IGA) score of 0 or 1 and reduction ≥ 2 points from baseline at Week 24
Week 0 and Week 24

The IGA scale ranges from 0 to 4, with higher score indicating more severe disease.

Non-US regions only: Number of participants with an Investigator's Global Assessment (IGA) score of 0 or 1 at Week 24
Week 0 and Week 24

The IGA scale ranges from 0 to 4, with higher score indicating more severe disease.

Non-US regions only: Number of participants with a ≥ 75% reduction in Eczema Area and Severity Index (EASI) score from baseline at Week 24 (EASI-75)
Week 0 and Week 24

The EASI scores range from 0 to 72, with higher scores indicating more severe atopic dermatitis.

Percent change from baseline in Severity of Alopecia Tool (SALT) score at Week 36
Baseline and Week 36

The SALT score is the sum of percentage of hair loss in all areas with a maximum score of 100 (higher score indicates greater hair loss).

Mean percent change in the Eczema Area and Severity Index (EASI) from baseline at Week 16
Week 0 and Week 16

The EASI scores range from 0 to 72, with higher scores indicating more severe atopic dermatitis.

Secondary Endpoints

US only: Number of participants with a ≥ 75% reduction in EASI score from baseline at Week 24 (EASI-75)
Week 0 and Week 24
Number of participants with a ≥ 90% reduction in EASI score from baseline at Week 24 (EASI-90)
Week 0 and Week 24
Number of participants at week 6 achieving a 4-point or greater improvement in Itch numerical rating scale (NRS) in the subset of participants with a 4-point or greater Itch NRS at baseline
Week 0 and Week 6
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Blinded Induction Period: Rezpegaldesleukin every 2 weeksEXPERIMENTALRezpegaldesleukin every 2 weeks during the induction period
Blinded Induction Period: PlaceboPLACEBO_COMPARATORPlacebo every 2 weeks during the induction period
Blinded Maintenance Period: Rezpegaldesleukin every 4 weeksEXPERIMENTALRezpegaldesleukin every 4 weeks during the maintenance period
Blinded Maintenance Period: Rezpegaldesleukin every 12 weeksEXPERIMENTALRezpegaldesleukin every 12 weeks during the maintenance period
Blinded Maintenance Period: PlaceboPLACEBO_COMPARATORPlacebo every 4 weeks during the maintenance period
Open-Label EscapeEXPERIMENTALRezpegaldesleukin at a frequency determined by the investigator during the open-label escape
Low DoseEXPERIMENTALRezpegaldesleukin Low Dose Every 2 weeks
High DoseEXPERIMENTALRezpegaldesleukin High Dose Every 2 weeks
PlaceboPLACEBO_COMPARATORPlacebo Every 2 weeks
Arm AEXPERIMENTALRezpegaldesleukin Dose Regimen A every 2 weeks during the induction period
Arm A1EXPERIMENTALRezpegaldesleukin Dose Regimen A every 4 weeks during the maintenance period
Arm A2EXPERIMENTALRezpegaldesleukin Dose Regimen A every 12 weeks during the maintenance period
Arm BEXPERIMENTALRezpegaldesleukin Dose Regimen B every 4 weeks during the induction period
Arm B1EXPERIMENTALRezpegaldesleukin Dose Regimen B every 4 weeks during the maintenance period
Arm B2EXPERIMENTALRezpegaldesleukin Dose Regimen B every 12 weeks during the maintenance period
Arm CEXPERIMENTALRezpegaldesleukin Dose Regimen C every 2 weeks during the induction period
Arm C1EXPERIMENTALRezpegaldesleukin Dose Regimen C every 4 weeks during the maintenance period
Arm C2EXPERIMENTALRezpegaldesleukin Dose Regimen C every 12 weeks during the maintenance period
Arm DPLACEBO_COMPARATORPlacebo every 2 weeks during the induction period
Arm D1PLACEBO_COMPARATORPlacebo every 4 weeks during the maintenance period
Escape Therapy (open-label)EXPERIMENTALRezpegaldesleukin Dose Regimen A every 2 weeks during the maintenance period

Interventions

NameTypeDescription
RezpegaldesleukinDRUGPharmaceutical form: Injection solution Route of administration: subcutaneous
PlaceboDRUGPharmaceutical form: Injection solution Route of administration: subcutaneous
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Eligibility Criteria

Age Range12 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites1

Inclusion Criteria: * Male or female patients, ≥ 12 years of age on the day of signing the informed consent form and weighing ≥ 40 kg prior to randomization at Baseline * Chronic atopic dermatitis (AD) defined as onset of AD signs and symptoms ≥ 12 months prior to Screening as determined by the ...

Countries:United StatesCanadaPolandAustraliaBulgariaCroatiaCzechiaGermanyHungarySpain
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Recent Changes (Last 90 Days)

LOWAug 21, 2026NCT06136741lastUpdatePostDate: changed
LOWAug 21, 2026NCT06136741lastUpdatePostDate: changed
LOWAug 4, 2026NCT07690371startDate: changed
LOWAug 4, 2026NCT07690371startDate: changed
LOWAug 3, 2026NCT06136741lastUpdatePostDate: changed
LOWAug 3, 2026NCT06136741lastUpdatePostDate: changed
LOWJul 17, 2026NCT07711418NEW_TRIAL: changed
LOWJul 17, 2026NCT07711418NEW_TRIAL: changed
LOWJul 10, 2026NCT06340360lastUpdatePostDate: changed
LOWJul 10, 2026NCT06340360lastUpdatePostDate: changed
LOWJul 8, 2026NCT07690371NEW_TRIAL: changed
LOWJul 8, 2026NCT07690371NEW_TRIAL: changed

Frequently asked questions about Rezpegaldesleukin

What is Rezpegaldesleukin used for?

Rezpegaldesleukin is an investigational drug being developed for moderate-to-severe atopic dermatitis and severe to very severe alopecia areata. It is currently in Phase 2 and Phase 3 clinical trials for these dermatological conditions.

Who makes Rezpegaldesleukin?

Rezpegaldesleukin is being developed by Nektar Therapeutics, a biopharmaceutical company traded on the NASDAQ under the ticker symbol NKTR. The company is conducting clinical trials to evaluate the drug's safety and efficacy in patients with atopic dermatitis and alopecia areata.

What phase is Rezpegaldesleukin in?

Rezpegaldesleukin is in Phase 2 and Phase 3 clinical development. It has completed Phase 2b trials for atopic dermatitis and alopecia areata, and Phase 3 trials for atopic dermatitis are currently recruiting patients. The drug has not yet been approved by the FDA and remains investigational.

What clinical trials is Rezpegaldesleukin in?

Rezpegaldesleukin is being studied in several clinical trials. NCT06136741 is a Phase 2b study in adults with moderate-to-severe atopic dermatitis. NCT06340360 is a Phase 2b study in adults with severe alopecia areata. NCT07690371 and NCT07711418 are Phase 3 studies in patients aged 12 and older with moderate-to-severe atopic dermatitis.

Is Rezpegaldesleukin FDA approved?

Rezpegaldesleukin is not FDA approved. It is an investigational drug that has received Fast Track designation from the FDA, which is intended to expedite its development and review. The drug is still in clinical trials and has not yet been submitted for regulatory approval.

Is Rezpegaldesleukin the same as NKTR-358?

Yes, Rezpegaldesleukin is also known as NKTR-358. Clinical trial records for the Phase 3 studies of atopic dermatitis refer to the drug as NKTR-358, while earlier Phase 2 trials use the name Rezpegaldesleukin. Both names refer to the same investigational compound.