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LY3884963

Phase 1

Frontotemporal Dementia | Monoclonal antibody | Neurology |Eli Lilly and Company|Last Updated: Jul 16, 2026

Success Probability

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Market & Valuation

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Trial Design

CONTROLLEDDMC
Total Trials1
Total Enrollment35

FDA Designations

No designations recorded

Clinical trial landscape

LY3884963 · 1 trial · 1 indication

Phase 1 1
NCT04408625Phase 1/2 Clinical Trial of LY3884963 in Patients With Frontotemporal Dementia With Progranulin Mutations (FTD-GRN)Frontotemporal Dementia
ACTIVE NOT_RECRUITING35 Analytics
PHASE1ACTIVE NOT_RECRUITING
Phase 1/2 Clinical Trial of LY3884963 in Patients With Frontotemporal Dementia With Progranulin Mutations (FTD-GRN)
Frontotemporal DementiaUnlock trial analytics

Study Endpoints

Primary Endpoints

Number of Adverse Events (AEs), Serious Adverse Events (SAEs), and Adverse Events Leading to discontinuation
5 Years
Sum of adverse reactions (ARs) and suspected ARs
5 years
Sum of serious ARs and serious suspected ARs
5 years
Incidence of procedure or treatment-emergent AEs
5 years

Measured by brain and spine MRI

Change in AAV9, PGRN, and NfL immunogenicity in blood
Days 7, 14, and 21 and at Months 1, 1.5, 2, 3, 6, 9, 12, 18, and 24

PGRN: progranulin protein. Measured by level of antibodies and ELISPOT

Change in AAV9, PGRN, and NfL immunogenicity in CSF
Months 2, 6, 12, 18, and 24

Measured by levels of antibodies.

Change in PGRN levels in blood
Days 7, 14, and 21 and at Months 1, 1.5, 2, 3, 6, 9, 12, 18, and 24
Change in PGRN levels in CSF
Months 2, 6, 12, 18, and 24

Secondary Endpoints

Change in CDR plus NACC FTLD
Months 3, 6, 9, and 12
Change in NfL levels in blood
Days 7, 14, and 21 and at Months 1, 1.5, 2, 3, 6, 9, and 12
Change in NfL levels in CSF
Months 2, 6, and 12
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Initial Cohort - Low doseEXPERIMENTAL -
Initial Cohort - Medium doseEXPERIMENTAL -
Bridging Cohort - Low doseEXPERIMENTALParticipants enrolled in the Bridging Cohort will be assigned to either low or medium dose in an alternating manner
Bridging Cohort - Medium doseEXPERIMENTALParticipants enrolled in the Bridging Cohort will be assigned to either low or medium dose in an alternating manner
Cohort 5-Medium DoseEXPERIMENTALWill enroll up to 10 participants with early phase of disease

Interventions

NameTypeDescription
LY3884963BIOLOGICALParticipants will receive a single dose of LY3884963, administered intra cisterna magna
MethylprednisoloneDRUGIV pulses every 2 weeks in the first 3 months.
Optional SirolimusDRUGAt the investigators discretion following steroid tolerability issues, patients may receive a loading dose, followed by maintenance dose, followed by dose tapering; administered as concomitant medication
Optional PrednisoneDRUGIf needed and at the investigator discretion, Oral Prednisone may be added to the immunosuppression regimen
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Eligibility Criteria

Age Range30 Years to 85 Years
SexALL
Healthy VolunteersNo
Study Sites12

Inclusion Criteria: * Men or women aged 30 to 85 years (inclusive), at the time of informed consent. * Body weight range of ≥40 kg (88 lbs) to ≤110 kg (242 lb) and a BMI of 18 to 34 kg/m2. * Has symptomatic frontotemporal dementia (FTD), including mild behavioral, cognitive, motor or language impai...

Countries:United StatesAustraliaBelgiumFranceSpainUnited Kingdom
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Recent Changes (Last 90 Days)

LOWJul 17, 2026NCT04408625lastUpdatePostDate: changed
LOWJul 17, 2026NCT04408625lastUpdatePostDate: changed
LOWJul 17, 2026NCT04408625lastUpdatePostDate: changed

Frequently asked questions about LY3884963

What is LY3884963 used for?

LY3884963 is an investigational monoclonal antibody being developed for frontotemporal dementia, specifically in patients with progranulin mutations (FTD-GRN). It is currently in Phase 1 clinical development and has not been approved by regulatory authorities.

What does LY3884963 target?

LY3884963 is a monoclonal antibody, but its specific molecular target has not been disclosed in available information. It is being studied for its potential to treat frontotemporal dementia with progranulin mutations.

Who makes LY3884963?

LY3884963 is being developed by Eli Lilly and Company, a pharmaceutical company traded on the New York Stock Exchange under the ticker symbol LLY.

What phase is LY3884963 in?

LY3884963 is in Phase 1 clinical development. It is an investigational drug and has not been approved by the FDA or other regulatory agencies. It is currently being evaluated in an active clinical trial.

What clinical trials is LY3884963 in?

LY3884963 is being studied in one active clinical trial, NCT04408625, a Phase 1/2 trial in patients with frontotemporal dementia with progranulin mutations. The trial is enrolling 35 participants across the United States, Australia, Belgium, France, Spain, and the United Kingdom.