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ACI-19626

Phase 1

Frontotemporal Dementia (FTD) | Unknown | Neurology |AC Immune SA|Last Updated: Mar 24, 2025

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
ACTIVE_CONTROLLEDBiomarker
Total Trials1
Total Enrollment45
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT06891716[18F]ACI-19626 PET in TDP-43 ProteinopathiesEARLY_PHASE1 RECRUITING 45Jan 21, 2025Nov 1, 2026Mar 24, 20251 Netherlands
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Study Endpoints
Primary Endpoints
Number of participants with Adverse Events (AEs) assessed by severity (mild, moderate or severe) and causal relationship (unrelated, unlikely, possibly or probably related)
From Informed Consent Signature (screening) to safety phone call after PET scan (i.e. up to 3 months in total)
Number of participants with clinically significant changes in vital signs measurements
During PET scan visit (i.e. at Day 0): before [18F]ACI-19626 injection and after the PET scan is completed

Vital signs measurements will be performed after the PET scan is completed and will be compared with measurements performed before the injection of \[18F\]ACI-19626.

Brain uptake of the tracer [18F]ACI-19626
At the time of the [18F]ACI-19626 PET scan (i.e. at Day 0): 0-90 minutes after injection

\[18F\]ACI-19626 brain uptake in relevant regions of interest of the brain will be measured with PET scan and the mean of each group (participants with TDP-proteinopathies and healthy controls) will be calculated.

Assessment of the optimal kinetic model quantification of [18F]ACI-19626 tracer uptake
At the time of the [18F]ACI-19626 PET scan (i.e. at Day 0): 0-90 minutes after injection

The selection of the optimal kinetic model will be done based on the Akaike's information criterion

Radiation dosimetry after one [18F]ACI-19626 PET scan
At the time of the [18F]ACI-19626 PET scan (i.e. at Day 0): 0-90 minutes after injection

The radiation dose absorbed by relevant vital organs and the total effective dose will be measured, and the mean of scanned participants will be calculated

Secondary Endpoints
Assessment of simplified methods to quantify brain uptake of the tracer [18F]ACI-19626
At the time of the [18F]ACI-19626 PET scan (i.e. at Day 0): 0-90 minutes after injection
Variability of the tracer brain uptake between two [18F]ACI-19626 PET scans (test/retest)
At the first [18F]ACI-19626 PET scan and the second [18F]ACI-19626 PET scan (i.e. up to 1 month)
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Study Design & Arms
AllocationNON_RANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeDIAGNOSTIC
Treatment Arms
ArmTypeDescription
Participants with suspected TDP-43 proteinopathiesEXPERIMENTALThe study population will be composed of participants with suspected TDP-43 proteinopathies
Healthy controlsACTIVE_COMPARATORThe study population will be composed of healthy controls.
Interventions
NameTypeDescription
[18F]ACI-19626OTHER\[18F\]ACI-19626 is an intravenously administered radioactive imaging agent being studied as a potential positron emitting radiopharmaceutical for in vivo imaging of TDP-43 deposits.
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Eligibility Criteria
Age Range40 Years — 70 Years
SexALL
Healthy VolunteersYes
Study Sites1

Inclusion Criteria for all Participants: * Subject is able to provide written informed consent (IC), which must be obtained before any assessment is performed. * Female subjects must not be of childbearing potential, or if they are of childbearing potential to agree to use reliable contraception me...

Countries:Netherlands
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Recent Changes (Last 90 Days)
LOWMay 26, 2026NCT06891716primaryCompletionDate: changed
LOWMay 24, 2026NCT06891716studyFirstPostDate: changed