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LY3884963

Phase 1

Frontotemporal Dementia | Monoclonal antibody | Neurology |Eli Lilly and Company|Last Updated: Apr 30, 2026

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
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Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
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Trial Design
CONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment35
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT04408625Phase 1/2 Clinical Trial of LY3884963 in Patients With Frontotemporal Dementia With Progranulin Mutations (FTD-GRN)PHASE1 ACTIVE NOT_RECRUITING 35Nov 9, 2020Nov 30, 2029Apr 30, 202612 United States, Australia +4
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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 — 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)
LOWMay 26, 2026NCT04408625primaryCompletionDate: changed
LOWMay 24, 2026NCT04408625studyFirstPostDate: changed