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ACI-15916

Phase 1

Parkinson's Disease (PD) | Unknown | Neurology |AC Immune SA|Last Updated: Nov 19, 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 Enrollment46
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT06891703[18F]ACI-15916 PET in α-synucleinopathiesEARLY_PHASE1 RECRUITING 46Mar 20, 2025Mar 1, 2026Nov 19, 20251 Sweden
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Study Endpoints
Primary Endpoints
Number of participants with Adverse Events (AEs) assessed by severity (mild, moderate, severe, life threatening, death) and causal relationship (not related, unlikely related, possibly related or related)
From Informed Consent Signature (screening) to safety phone call after PET scan (i.e. up to 14 weeks 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-15916 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-15916

Brain uptake of the tracer [18F]ACI-15916
At the time of the [18F]ACI-15916 PET scan (i.e. at Day 0): 0-93 minutes after injection

\[18F\]ACI-15916 uptake in relevant regions of interest of the brain will be measured with PET scan and the mean of each group (participants with α-synucleinopathies and healthy volunteers) will be calculated

Secondary Endpoints
Assessment of simplified methods to quantify brain uptake of the tracer [18F]ACI-15916
At the time of the [18F]ACI-15916 PET scan (i.e. at Day 0): 0-93 minutes after injection
Variability of the tracer brain uptake between two [18F]ACI-15916 PET scans (test/retest)
From the first PET scan (i.e. Day 0) to the second PET scan (i.e. Day 30)
Radiation dosimetry after one [18F]ACI-15916 PET scan
At the time of the [18F]ACI-15916 PET scan (i.e. at Day 0): 0-6 hours after injection
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Study Design & Arms
AllocationNON_RANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeDIAGNOSTIC
Treatment Arms
ArmTypeDescription
Participants with suspected α-synucleinopathiesEXPERIMENTALThe study population will be composed of participants with suspected α-synucleinopathies
Healthy volunteersACTIVE_COMPARATORThe study population will be composed of healthy volunteers
Interventions
NameTypeDescription
[18F]ACI-15916OTHER\[18F\]ACI-15916 is an intravenously administered radioactive imaging agent being studied as a potential positron emitting radiopharmaceutical for in vivo imaging of α-synuclein deposits.
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Eligibility Criteria
Age Range20 Years — N/A
SexALL
Healthy VolunteersYes
Study Sites1

Inclusion Criteria for all Participants: 1. Subject is able to provide written informed consent, which must be obtained before any assessment is performed. 2. Subjects must be able to understand and be willing to comply with study procedures, restrictions, and requirements. 3. Body mass index is \>...

Countries:Sweden
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Recent Changes (Last 90 Days)
LOWMay 26, 2026NCT06891703primaryCompletionDate: changed
LOWMay 24, 2026NCT06891703studyFirstPostDate: changed