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LY4100511

Phase 2

Plaque Psoriasis | Small molecule | Dermatology |Eli Lilly and Company|Trials Updated: Aug 18, 2026

LY4100511 development status

Highest phase Phase 2
Registered trials 3 across 2 sponsors since Sep 2024

LY4100511 target and mechanism

ModalitySmall molecule

Also known as LY4100511 (DC-853), LY4100511 (DC-853) Dose 1, LY4100511 Dose 1

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLED
Total Trials1
Total Enrollment222

FDA Designations

No designations recorded

LY4100511 clinical trials

LY4100511 · 1 trial · 1 indication

Phase 2 1
NCT06602219A Study of LY4100511 (DC-853) in Adult Participants With Moderate-to-Severe Plaque PsoriasisPlaque Psoriasis
COMPLETED222 Analytics
PHASE2COMPLETED
A Study of LY4100511 (DC-853) in Adult Participants With Moderate-to-Severe Plaque Psoriasis
Plaque PsoriasisUnlock trial analytics

Study Endpoints

Primary Endpoints

Percentage of Participants Achieving ≥75% Reduction From Baseline in Psoriasis Area and Severity Index (PASI-75) at Week 12 (LY4100511 Versus Placebo)
Week 12

Percentage of participants achieving ≥75% reduction from baseline in PASI-75 at Week 12 without use of background antipsoriasis therapy were responders. The PASI measures psoriasis severity based on lesion characteristics and body surface area (BSA) affected. Erythema, thickness, and scaling are each scored from 0 (none) to 4 (very severe) across four regions: head, trunk, upper limbs, and lower limbs. Area involvement in each region is graded from 0 (none) to 6 (90-100%). The sum of severity scores for erythema, thickness, and scaling is multiplied by the degree of involvement for each anatomic region and a region-specific BSA weight (0.1, 0.3, 0.2, 0.4). Regional scores are summed to give a total PASI score ranging from 0 to 72, with higher values indicating greater severity.

Secondary Endpoints

Percentage of Participants Achieving ≥75% Reduction From Baseline in Psoriasis Area and Severity Index (PASI-75) at Week 12 (LY4100511 200mg vs 400mg vs 800mg)
Week 12
Percentage of Participants Achieving an sPGA Score of 0 (Clear) or 1 (Almost Clear) With ≥2 Grade Improvement From Baseline at Week 12
Week 12
Percentage of Participants Achieving ≥50% Reduction From Baseline in Psoriasis Area and Severity Index (PASI-50) at Week 12
Week 12
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Study Design & Arms

AllocationRANDOMIZED
MaskingDOUBLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
LY4100511 200 mg BIDEXPERIMENTALParticipants received LY4100511 200 milligrams (mg) administered orally twice daily (BID) for 12 weeks.
LY4100511 400 mg BIDEXPERIMENTALParticipants received LY4100511 400 mg administered orally BID for 12 weeks.
LY4100511 800 mg QDEXPERIMENTALParticipants received LY4100511 800 mg administered orally once daily (QD) for 12 weeks, with matching placebo administered in the evening.
Placebo BIDPLACEBO_COMPARATORParticipants received placebo administered orally BID for 12 weeks.

Interventions

NameTypeDescription
LY4100511DRUGAdministered orally
PlaceboDRUGAdministered orally
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Eligibility Criteria

Age Range18 Years to 70 Years
SexALL
Healthy VolunteersNo
Study Sites58

Inclusion Criteria: * Clinical diagnosis of plaque psoriasis for 6 months before the baseline day 1 randomization * Must have a body mass index (BMI) of 18 to 40 kilogram/square meter (kg/m2) (inclusive). * Must be willing to discontinue topical and/or systemic therapies for psoriasis before the fi...

Countries:United StatesCanadaCzechiaGermanyHungaryJapanPoland
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Recent Changes (Last 90 Days)

MEDIUMSep 18, 2026NCT06602219TRIAL_REMOVED: changed
MEDIUMSep 18, 2026NCT06602219TRIAL_REMOVED: changed

Frequently asked questions about LY4100511

What is LY4100511 used for?

LY4100511 is being developed for the treatment of moderate-to-severe plaque psoriasis in adults. It is an investigational small molecule studied in a Phase 2 clinical trial that enrolled 222 participants aged 18 years and older across the United States, Canada, Czechia, Germany, Hungary, Japan, and Poland.

Who makes LY4100511?

LY4100511 is developed by Eli Lilly and Company, which trades on the New York Stock Exchange under the ticker LLY. The company sponsored the Phase 2 clinical study of the drug in adults with moderate-to-severe plaque psoriasis.

What phase is LY4100511 in?

LY4100511 is in Phase 2 clinical development. The Phase 2 trial, NCT06602219, has been completed. The drug is investigational and has not been approved by the FDA for any indication.

What clinical trials is LY4100511 in?

LY4100511 has been studied in one clinical trial, NCT06602219, titled "A Study of LY4100511 (DC-853) in Adult Participants With Moderate-to-Severe Plaque Psoriasis." This completed Phase 2 trial was randomized, double-blind, placebo-controlled, and enrolled 222 participants.

Is LY4100511 the same as DC-853?

Yes, LY4100511 is also known as DC-853. The Phase 2 trial in moderate-to-severe plaque psoriasis refers to the drug as LY4100511 (DC-853), and the same compound has also been described as LY4100511 (DC-853) Dose 1 and LY4100511 Dose 1 in study documentation.