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CompletedPhase 1

Study to Evaluate DNL747 in Subjects With Alzheimer's Disease

A Multicenter, Randomized, Placebo-Controlled, Double-Blind, Phase 1b Study to Evaluate the Safety, Tolerability, Pharmacokinetics, and Pharmacodynamics of DNL747 in Subjects With Alzheimer's Disease

Asset

DNL747

Listed sites

5

Recruiting sites

-

Enrollment

16

actual

Study population

Alzheimer’s disease

Key I/E criteria

Alzheimer's diseaseAmyloid biomarker required (PET/CSF)CDR global 0.5-1MMSE 16-26

Primary endpoints

Treatment-Emergent Adverse Events (AEs) and Serious Adverse Events (SAEs)Clinically significant neurological examination abnormalitiesLaboratory test abnormalities

Footprint

Where this trial recruits

Site locations as reported to ClinicalTrials.gov. Site count is not enrollment count; per-site enrollment is not available from source.

Identifiers

Registered as

Org study IDDNLI-D-0002
NCT IDNCT03757325

Timeline

Milestones

Study first posted2018-11-28actual
Study start2019-02-13actual
Primary completion2019-12-05actual
Study completion2019-12-05actual
Last update posted2020-02-26actual

Assets

Drug assets

Study populations

Who this study enrolls

Alzheimer’s disease

Eligibility

Who can enroll

Minimum age55 Years
Maximum age85 Years
SexAll
Healthy volunteersNot accepted

Inclusion criteria

Key Inclusion Criteria:

Women of non-childbearing potential and men, aged 55-85 years
AD diagnosis based on the 2011 National Institute on Aging-Alzheimer's Association Guidelines
Supportive evidence for diagnosis of AD based upon positive CSF Aβ42 test, or documented history of positive amyloid-specific PET scan
Screening MMSE score of 16-26 points
Screening CDR Global Score of 0.5-1.0
Availability of a person ("caregiver") who, in the investigator's judgment, has frequent and sufficient contact with the participant and is able to provide accurate information regarding the participant's cognitive and functional abilities, agrees to provide information at clinic visits that require input for scale completion, assists the participant with compliance for at-home study treatment administration, and signs the necessary consent form (note: the caregiver is not required to stay in the unit)
Approved AD treatments (acetylcholinesterase inhibitors ± memantine) and other prescription medications must be stable for ≥1 month prior to screening and anticipated to be stable over the duration of the study

Exclusion criteria

Clinical history within 2 years of the screening visit or current evidence of any neurological or neurodegenerative disorder other than AD that is associated with transient or sustained alterations in cognition
Magnetic resonance imaging (MRI) at screening (or within 1 year of screening visit) consistent with any neurological or neurodegenerative disorder other than AD that is associated with transient or sustained alterations in cognition

Endpoints (9)

What's being measured

Protocol endpoints and posted registry outcome measures, grouped into outcome categories. Composite endpoints show their component event types. Standard codes (LOINC, SNOMED CT) are shown where available.

Coverage by outcome category

Safety / tolerability / PK
5
Other (unclassified)
3
Fluid / digital biomarkers
1

Fluid / digital biomarkers

1 endpoint
Secondary/protocol endpoint

Pharmacokinetic measure of CSF concentrations of DNL747

Time frame:Randomization - Day 86

concentration, descriptive

Safety / tolerability / PK

5 endpoints
Primary/protocol endpoint

Number of Subjects with Treatment-Emergent Adverse Events (AEs) and Serious Adverse Events (SAEs)

Time frame:Randomization - Day 86

event count, event

Secondary/protocol endpoint

Pharmacokinetic measure of maximum observed plasma concentration (Cmax) of DNL747

Time frame:Randomization - Day 86

concentration, descriptive

Secondary/protocol endpoint

Pharmacokinetic measure of time to reach maximum observed plasma concentration (Tmax) of DNL747

Time frame:Randomization - Day 86

time to event, event

Secondary/protocol endpoint

Pharmacokinetic measure of area under the plasma drug concentration-time curve (AUC) of DNL747

Time frame:Randomization - Day 86

concentration, descriptive

Secondary/protocol endpoint

Pharmacokinetic terminal disposition rate constant (λz) with the respective t1/2 of DNL747

Time frame:Randomization - Day 86

descriptive

Other (unclassified)

3 endpoints
Primary/protocol endpoint/low confidence

Number of Subjects with clinically significant neurological examination abnormalities

Time frame:Randomization - Day 86

event count, event

Primary/protocol endpoint/low confidence

Number of Subjects with laboratory test abnormalities

Time frame:Randomization - Day 86

event count, event

Secondary/protocol endpoint/low confidence

Pharmacodynamic measure of pS166 in PBMCs

Time frame:Randomization - Day 86

descriptive

Publications (1)

Bibliography

Records linked to this trial through ClinicalTrials.gov references, PubMed NCT search, and curated study seeds. 'Canonical' marks design/result papers; others are registry references or candidates.

Provenance

Sources

Trial identity, design, statusClinicalTrials.gov API v2
Snapshot dateJuly 21, 2026
Endpoint classificationDelfa ADRD endpoint taxonomy
Results tableno registry results posted yet

Trial facts come from public ClinicalTrials.gov records. Endpoint categories are Delfa's classification of those records, not a ClinicalTrials.gov field. All figures reflect the July 21, 2026 snapshot.