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CompletedPhase 1Results posted

Study Evaluating The Safety Of AAB-003 (PF-05236812) In Subjects With Alzheimer's Disease

A Phase 1, Multicenter, Randomized, Double-blind, Placebo-controlled, Adaptive, Multiple Ascending Dose Study Of The Safety, Tolerability And Pharmacokinetics Of Aab-003 (Pf-05236812) In Subjects With Mild To Moderate Alzheimer's Disease

Lead sponsor

Pfizer

Asset

AAB-003 (PF-05236812)

Listed sites

29

Recruiting sites

-

Enrollment

88

actual

Study population

Alzheimer’s disease

Key I/E criteria

Alzheimer's diseaseMMSE 16-26MRI contraindications excluded

Primary endpoints

Treatment-Emergent Adverse Events (TEAEs)Laboratory AbnormalitiesVital Signs of Potential Clinical Concern

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

Secondary ID3245K1-1000Alias Study Number
Org study IDB2601001
NCT IDNCT01193608

Timeline

Milestones

Study start2010-09 (month precision)
Study first posted2010-09-02estimated
Primary completion2013-10actual (month precision)
Study completion2013-10actual (month precision)
Last update posted2017-02-23actual
Results first posted2017-02-23actual

Assets

Drug assets

Study populations

Who this study enrolls

Alzheimer’s disease

Eligibility

Who can enroll

Minimum age50 Years
Maximum age89 Years
SexAll
Healthy volunteersNot accepted

Inclusion criteria

Diagnosis of probable Alzheimer's Disease with MMSE score of 16-26, and brain MRI consistent with the diagnosis of Alzheimer's Disease
Concurrent use of cholinesterase inhibitor or memantine allowed, if stable.
Caregiver will participate and be able to attend clinic visits with patient

Exclusion criteria

Significant neurological disease other than Alzheimer's Disease
Major psychiatric disorder
Contraindication to undergo brain MRI (e.g., pacemaker, CSF shunt, or foreign metal objects in the body)
Women of childbearing potential

Endpoints (92)

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

Other (unclassified)
26
Amyloid biomarkers
20
Safety / tolerability / PK
18
Global cognition
6
Fluid / digital biomarkers
6
Behavior / neuropsychiatric
4
Tau biomarkers
4
Neuroimaging
4
Executive function / language
2
Function / daily living
2

Global cognition

6 endpoints
Other/protocol endpoint

Change From Baseline in Alzheimer's Disease Assessment Scale - Cognitive Subscale (ADAS-cog) Score at Weeks 13, 26 and 39

Time frame:Baseline, Weeks 13, 26 and 39

ADAS-Cog

change from baseline, improvement

Other/protocol endpoint

Change From Baseline on the Clinical Dementia Rating (CDR) Sum of Boxes (CDR-SB) and Global CDR Rating at Weeks 26 and 39

Time frame:Baseline, Weeks 26 and 39

Clinical Dementia Rating-Sum of Boxes (CDR-SB)

change from baseline, improvement

Other/protocol endpoint

Change From Baseline on the Mini Mental State Exam (MMSE) Score at Weeks 13, 26, and 39

Time frame:Baseline, Weeks 13, 26 and 39

Mini-Mental State Examination (MMSE)

change from baseline, improvement

Other_pre_specified/registry result

Change From Baseline in Alzheimer's Disease Assessment Scale - Cognitive Subscale (ADAS-cog) Score at Weeks 13, 26 and 39

Time frame:Baseline, Weeks 13, 26 and 39

ADAS-Cog

change from baseline, improvement

Posted result

GroupValue (mean), Units on a scaleStandard deviation
AAB-003 0.5 mg/kgBaseline (n=6,6,16,17,24,19)n=6 Participants12.63.73
Week 13 (n=6,5,15,15,22,19)n=6 Participants1.31.45
Week 26 (n=6,5,14,13,18,19)n=6 Participants0.92.73
Week 39 (n=6,4,14,13,19,17)n=6 Participants0.23.13
AAB-003 1 mg/kgBaseline (n=6,6,16,17,24,19)n=6 Participants20.47.49
Week 13 (n=6,5,15,15,22,19)n=6 Participants3.34.39
Week 26 (n=6,5,14,13,18,19)n=6 Participants0.74.73
Week 39 (n=6,4,14,13,19,17)n=6 Participants1.43.41
AAB-003 2 mg/kgBaseline (n=6,6,16,17,24,19)n=16 Participants21.610.76
Week 13 (n=6,5,15,15,22,19)n=16 Participants-0.45.08
Week 26 (n=6,5,14,13,18,19)n=16 Participants0.55.40
Week 39 (n=6,4,14,13,19,17)n=16 Participants2.66.80
AAB-003 4 mg/kgBaseline (n=6,6,16,17,24,19)n=17 Participants23.011.15
Week 13 (n=6,5,15,15,22,19)n=17 Participants3.24.18
Week 26 (n=6,5,14,13,18,19)n=17 Participants3.35.55
Week 39 (n=6,4,14,13,19,17)n=17 Participants4.19.80
AAB-003 8 mg/kgBaseline (n=6,6,16,17,24,19)n=24 Participants18.07.28
Week 13 (n=6,5,15,15,22,19)n=24 Participants-1.24.20
Week 26 (n=6,5,14,13,18,19)n=24 Participants-0.85.07
Week 39 (n=6,4,14,13,19,17)n=24 Participants-0.55.88
PlaceboBaseline (n=6,6,16,17,24,19)n=19 Participants18.47.54
Week 13 (n=6,5,15,15,22,19)n=19 Participants0.23.40
Week 26 (n=6,5,14,13,18,19)n=19 Participants1.45.85
Week 39 (n=6,4,14,13,19,17)n=19 Participants1.43.95
Other_pre_specified/registry result

Change From Baseline on the Clinical Dementia Rating (CDR) Sum of Boxes (CDR-SB) and Global CDR Rating at Weeks 26 and 39

Time frame:Baseline, Weeks 26 and 39

Clinical Dementia Rating-Sum of Boxes (CDR-SB)

change from baseline, improvement

Posted result

GroupValue (mean), Units on a scaleStandard deviation
AAB-003 0.5 mg/kgCDS-SB - Baseline (n=6,6,16,17,24,19)n=6 Participants8.001.673
Global CDR - Baseline (n=6,6,16,17,24,19)n=6 Participants0.670.258
CDR-SB - Week 26 (n=6,5,14,14,18,19)n=6 Participants1.331.751
Global CDR - Week 26 (n=6,5,14,14,18,19)n=6 Participants0.330.408
CDR-SB - Week 39 (n=6,4,14,14,19,17)n=6 Participants1.003.286
Global CDR - Week 39 (n=6,4,14,14,19,17)n=6 Participants0.330.408
AAB-003 1 mg/kgCDS-SB - Baseline (n=6,6,16,17,24,19)n=6 Participants11.174.070
Global CDR - Baseline (n=6,6,16,17,24,19)n=6 Participants1.080.492
CDR-SB - Week 26 (n=6,5,14,14,18,19)n=6 Participants1.401.517
Global CDR - Week 26 (n=6,5,14,14,18,19)n=6 Participants0.300.447
CDR-SB - Week 39 (n=6,4,14,14,19,17)n=6 Participants1.751.708
Global CDR - Week 39 (n=6,4,14,14,19,17)n=6 Participants0.130.250
AAB-003 2 mg/kgCDS-SB - Baseline (n=6,6,16,17,24,19)n=16 Participants9.504.351
Global CDR - Baseline (n=6,6,16,17,24,19)n=16 Participants1.030.618
CDR-SB - Week 26 (n=6,5,14,14,18,19)n=16 Participants-0.072.056
Global CDR - Week 26 (n=6,5,14,14,18,19)n=16 Participants0.040.414
CDR-SB - Week 39 (n=6,4,14,14,19,17)n=16 Participants1.002.449
Global CDR - Week 39 (n=6,4,14,14,19,17)n=16 Participants0.040.414
AAB-003 4 mg/kgCDS-SB - Baseline (n=6,6,16,17,24,19)n=17 Participants10.943.614
Global CDR - Baseline (n=6,6,16,17,24,19)n=17 Participants1.090.476
CDR-SB - Week 26 (n=6,5,14,14,18,19)n=17 Participants1.292.758
Global CDR - Week 26 (n=6,5,14,14,18,19)n=17 Participants0.250.510
CDR-SB - Week 39 (n=6,4,14,14,19,17)n=17 Participants1.863.371
Global CDR - Week 39 (n=6,4,14,14,19,17)n=17 Participants0.500.679
AAB-003 8 mg/kgCDS-SB - Baseline (n=6,6,16,17,24,19)n=24 Participants8.753.566
Global CDR - Baseline (n=6,6,16,17,24,19)n=24 Participants0.850.429
CDR-SB - Week 26 (n=6,5,14,14,18,19)n=24 Participants0.171.855
Global CDR - Week 26 (n=6,5,14,14,18,19)n=24 Participants0.030.320
CDR-SB - Week 39 (n=6,4,14,14,19,17)n=24 Participants0.792.840
Global CDR - Week 39 (n=6,4,14,14,19,17)n=24 Participants0.130.436
PlaceboCDS-SB - Baseline (n=6,6,16,17,24,19)n=19 Participants8.893.381
Global CDR - Baseline (n=6,6,16,17,24,19)n=19 Participants0.870.467
CDR-SB - Week 26 (n=6,5,14,14,18,19)n=19 Participants0.161.979
Global CDR - Week 26 (n=6,5,14,14,18,19)n=19 Participants-0.030.262
CDR-SB - Week 39 (n=6,4,14,14,19,17)n=19 Participants-0.351.935
Global CDR - Week 39 (n=6,4,14,14,19,17)n=19 Participants-0.060.300
Other_pre_specified/registry result

Change From Baseline on the Mini Mental State Exam (MMSE) Score at Weeks 13, 26, and 39

Time frame:Baseline, Weeks 13, 26 and 39

Mini-Mental State Examination (MMSE)

change from baseline, improvement

Posted result

GroupValue (mean), Units on a scaleStandard deviation
AAB-003 0.5 mg/kgBaseline (n=6,6,16,17,24,19)n=6 Participants22.71.37
Week 13 (n=6,6,15,16,22,19)n=6 Participants1.82.32
Week 26 (n=6,5,14,14,18,19)n=6 Participants1.81.72
Week 39 (n=6,4,14,14,19,17)n=6 Participants1.54.18
AAB-003 1 mg/kgBaseline (n=6,6,16,17,24,19)n=6 Participants22.52.43
Week 13 (n=6,6,15,16,22,19)n=6 Participants-0.52.35
Week 26 (n=6,5,14,14,18,19)n=6 Participants0.21.10
Week 39 (n=6,4,14,14,19,17)n=6 Participants-1.00.82
AAB-003 2 mg/kgBaseline (n=6,6,16,17,24,19)n=16 Participants20.83.71
Week 13 (n=6,6,15,16,22,19)n=16 Participants0.12.45
Week 26 (n=6,5,14,14,18,19)n=16 Participants0.03.51
Week 39 (n=6,4,14,14,19,17)n=16 Participants-0.22.58
AAB-003 4 mg/kgBaseline (n=6,6,16,17,24,19)n=17 Participants20.13.00
Week 13 (n=6,6,15,16,22,19)n=17 Participants-1.42.78
Week 26 (n=6,5,14,14,18,19)n=17 Participants-2.02.96
Week 39 (n=6,4,14,14,19,17)n=17 Participants-2.24.56
AAB-003 8 mg/kgBaseline (n=6,6,16,17,24,19)n=24 Participants21.22.82
Week 13 (n=6,6,15,16,22,19)n=24 Participants0.92.00
Week 26 (n=6,5,14,14,18,19)n=24 Participants1.62.91
Week 39 (n=6,4,14,14,19,17)n=24 Participants1.43.55
PlaceboBaseline (n=6,6,16,17,24,19)n=19 Participants21.23.78
Week 13 (n=6,6,15,16,22,19)n=19 Participants1.01.60
Week 26 (n=6,5,14,14,18,19)n=19 Participants0.72.91
Week 39 (n=6,4,14,14,19,17)n=19 Participants0.53.06

Executive function / language

2 endpoints
Primary/protocol endpoint

Number of Participants With Abnormal Neurological Examination Findings

Time frame:Screening, Day 1 (Baseline) and Weeks 1,6,13,19,26,32, and 39, and at Early Withdrawal

event count, event

Primary/registry result

Number of Participants With Abnormal Neurological Examination Findings

Time frame:Screening, Day 1 (Baseline) and Weeks 1,6,13,19,26,32, and 39, and at Early Withdrawal

event count, event

Posted result

GroupValue (number), ParticipantsReported bounds
AAB-003 0.5 mg/kgDay 1 (n=6,6,16,17,24,19)n=6 Participants1-
Week 1 (n=6,6,16,17,24,19)n=6 Participants1-
Week 6 (n=6,6,16,17,24,19)n=6 Participants1-
Week 13 (n=6,6,15,16,22,19)n=6 Participants1-
Week 19 (n=6,5,14,15,21,19)n=6 Participants1-
Week 26 (n=6,5,14,14,18,19)n=6 Participants2-
Week 32 (n=6,5,14,14,19,18)n=6 Participants1-
Week 39 (n=6,4,14,14,19,17)n=6 Participants1-
AAB-003 1 mg/kgDay 1 (n=6,6,16,17,24,19)n=6 Participants2-
Week 1 (n=6,6,16,17,24,19)n=6 Participants1-
Week 6 (n=6,6,16,17,24,19)n=6 Participants1-
Week 13 (n=6,6,15,16,22,19)n=6 Participants1-
Week 19 (n=6,5,14,15,21,19)n=6 Participants1-
Week 26 (n=6,5,14,14,18,19)n=6 Participants1-
Week 32 (n=6,5,14,14,19,18)n=6 Participants1-
Week 39 (n=6,4,14,14,19,17)n=6 Participants1-
AAB-003 2 mg/kgDay 1 (n=6,6,16,17,24,19)n=16 Participants2-
Week 1 (n=6,6,16,17,24,19)n=16 Participants2-
Week 6 (n=6,6,16,17,24,19)n=16 Participants2-
Week 13 (n=6,6,15,16,22,19)n=16 Participants4-
Week 19 (n=6,5,14,15,21,19)n=16 Participants1-
Week 26 (n=6,5,14,14,18,19)n=16 Participants1-
Week 32 (n=6,5,14,14,19,18)n=16 Participants1-
Week 39 (n=6,4,14,14,19,17)n=16 Participants1-
AAB-003 4 mg/kgDay 1 (n=6,6,16,17,24,19)n=17 Participants3-
Week 1 (n=6,6,16,17,24,19)n=17 Participants3-
Week 6 (n=6,6,16,17,24,19)n=17 Participants3-
Week 13 (n=6,6,15,16,22,19)n=17 Participants3-
Week 19 (n=6,5,14,15,21,19)n=17 Participants4-
Week 26 (n=6,5,14,14,18,19)n=17 Participants2-
Week 32 (n=6,5,14,14,19,18)n=17 Participants2-
Week 39 (n=6,4,14,14,19,17)n=17 Participants4-
AAB-003 8 mg/kgDay 1 (n=6,6,16,17,24,19)n=24 Participants1-
Week 1 (n=6,6,16,17,24,19)n=24 Participants0-
Week 6 (n=6,6,16,17,24,19)n=24 Participants0-
Week 13 (n=6,6,15,16,22,19)n=24 Participants0-
Week 19 (n=6,5,14,15,21,19)n=24 Participants1-
Week 26 (n=6,5,14,14,18,19)n=24 Participants1-
Week 32 (n=6,5,14,14,19,18)n=24 Participants0-
Week 39 (n=6,4,14,14,19,17)n=24 Participants0-
PlaceboDay 1 (n=6,6,16,17,24,19)n=19 Participants6-
Week 1 (n=6,6,16,17,24,19)n=19 Participants5-
Week 6 (n=6,6,16,17,24,19)n=19 Participants5-
Week 13 (n=6,6,15,16,22,19)n=19 Participants4-
Week 19 (n=6,5,14,15,21,19)n=19 Participants4-
Week 26 (n=6,5,14,14,18,19)n=19 Participants7-
Week 32 (n=6,5,14,14,19,18)n=19 Participants6-
Week 39 (n=6,4,14,14,19,17)n=19 Participants6-

Function / daily living

2 endpoints
Other/protocol endpoint

Change From Baseline in Disability Assessment in Dementia (DAD) Score at Weeks 13, 26 and 39

Time frame:Baseline, Weeks 13, 26 and 39

change from baseline, improvement

Other_pre_specified/registry result

Change From Baseline in Disability Assessment in Dementia (DAD) Score at Weeks 13, 26 and 39

Time frame:Baseline, Weeks 13, 26 and 39

change from baseline, improvement

Posted result

GroupValue (mean), Units on a scaleStandard deviation
AAB-003 0.5 mg/kgBaseline (n=6,6,16,17,24,19)n=6 Participants84.511.27
Week 13 (n=6,6,15,16,22,19)n=6 Participants5.78.82
Week 26 (n=6,5,14,14,18,19)n=6 Participants4.39.20
Week 39 (n=6,4,14,14,19,17)n=6 Participants-1.88.40
AAB-003 1 mg/kgBaseline (n=6,6,16,17,24,19)n=6 Participants63.731.89
Week 13 (n=6,6,15,16,22,19)n=6 Participants-1.214.22
Week 26 (n=6,5,14,14,18,19)n=6 Participants-0.812.30
Week 39 (n=6,4,14,14,19,17)n=6 Participants0.512.92
AAB-003 2 mg/kgBaseline (n=6,6,16,17,24,19)n=16 Participants78.620.84
Week 13 (n=6,6,15,16,22,19)n=16 Participants-3.811.61
Week 26 (n=6,5,14,14,18,19)n=16 Participants-3.810.20
Week 39 (n=6,4,14,14,19,17)n=16 Participants-6.911.33
AAB-003 4 mg/kgBaseline (n=6,6,16,17,24,19)n=17 Participants77.917.91
Week 13 (n=6,6,15,16,22,19)n=17 Participants-5.115.57
Week 26 (n=6,5,14,14,18,19)n=17 Participants-10.414.93
Week 39 (n=6,4,14,14,19,17)n=17 Participants-14.619.52
AAB-003 8 mg/kgBaseline (n=6,6,16,17,24,19)n=24 Participants84.815.31
Week 13 (n=6,6,15,16,22,19)n=24 Participants-6.312.71
Week 26 (n=6,5,14,14,18,19)n=24 Participants0.214.32
Week 39 (n=6,4,14,14,19,17)n=24 Participants-1.912.39
PlaceboBaseline (n=6,6,16,17,24,19)n=19 Participants84.912.65
Week 13 (n=6,6,15,16,22,19)n=19 Participants-3.07.56
Week 26 (n=6,5,14,14,18,19)n=19 Participants-2.57.73
Week 39 (n=6,4,14,14,19,17)n=19 Participants-1.811.31

Behavior / neuropsychiatric

4 endpoints
Primary/protocol endpoint

Number of Participants With Categorical Scores on the Columbia Suicide Severity Rating Scale (C-SSRS)

Time frame:Baseline up to Week 39 or Early Withdrawal

event count, event

Primary/registry result

Number of Participants With Categorical Scores on the Columbia Suicide Severity Rating Scale (C-SSRS)

Time frame:Baseline up to Week 39 or Early Withdrawal

event count, event

Posted result

GroupValue (number), ParticipantsReported bounds
AAB-003 0.5 mg/kgn=6 Participants0-
AAB-003 1 mg/kgn=6 Participants0-
AAB-003 2 mg/kgn=16 Participants1-
AAB-003 4 mg/kgn=17 Participants0-
AAB-003 8 mg/kgn=24 Participants1-
Placebon=19 Participants2-
Other/protocol endpoint

Change From Baseline in Behavioral Symtoms as Measured by the Neuropsychiatric Inventory (NPI) at Weeks 13, 26 and 39

Time frame:Baseline, Weeks 13, 26 and 39

Neuropsychiatric Inventory (NPI)

change from baseline, improvement

Other_pre_specified/registry result

Change From Baseline in Behavioral Symtoms as Measured by the Neuropsychiatric Inventory (NPI) at Weeks 13, 26 and 39

Time frame:Baseline, Weeks 13, 26 and 39

Neuropsychiatric Inventory (NPI)

change from baseline, improvement

Posted result

GroupValue (mean), Units on a scaleStandard deviation
AAB-003 0.5 mg/kgBaseline (n=6,6,16,17,23,19)n=6 Participants11.79.67
Week 13 (n=6,6,15,15,21,18)n=6 Participants-2.74.80
Week 26 (n=6,5,14,14,18,19)n=6 Participants-1.75.24
Week 39 (n=6,3,14,13,19,17)n=6 Participants0.55.21
AAB-003 1 mg/kgBaseline (n=6,6,16,17,23,19)n=6 Participants6.39.18
Week 13 (n=6,6,15,15,21,18)n=6 Participants4.86.68
Week 26 (n=6,5,14,14,18,19)n=6 Participants4.84.09
Week 39 (n=6,3,14,13,19,17)n=6 Participants3.32.52
AAB-003 2 mg/kgBaseline (n=6,6,16,17,23,19)n=16 Participants9.18.69
Week 13 (n=6,6,15,15,21,18)n=16 Participants-0.74.27
Week 26 (n=6,5,14,14,18,19)n=16 Participants-1.22.94
Week 39 (n=6,3,14,13,19,17)n=16 Participants0.66.61
AAB-003 4 mg/kgBaseline (n=6,6,16,17,23,19)n=17 Participants10.811.46
Week 13 (n=6,6,15,15,21,18)n=17 Participants0.47.31
Week 26 (n=6,5,14,14,18,19)n=17 Participants4.612.17
Week 39 (n=6,3,14,13,19,17)n=17 Participants4.817.07
AAB-003 8 mg/kgBaseline (n=6,6,16,17,23,19)n=24 Participants7.77.30
Week 13 (n=6,6,15,15,21,18)n=24 Participants0.34.94
Week 26 (n=6,5,14,14,18,19)n=24 Participants0.36.01
Week 39 (n=6,3,14,13,19,17)n=24 Participants0.16.70
PlaceboBaseline (n=6,6,16,17,23,19)n=19 Participants13.812.93
Week 13 (n=6,6,15,15,21,18)n=19 Participants-2.16.81
Week 26 (n=6,5,14,14,18,19)n=19 Participants-3.48.65
Week 39 (n=6,3,14,13,19,17)n=19 Participants-2.610.63

Amyloid biomarkers

20 endpoints
Other/protocol endpoint

Change From Baseline in CSF Amyloid-beta x-40 Concentration at Week 32 for AAB-003 8 mg/kg and Placebo Groups

Time frame:Baseline and Week 32

change from baseline, improvement

Other/protocol endpoint

CSF Amyloid-beta x-40 Concentration at Baseline and Week 32 for AAB-003 2 mg/kg and 4 mg/kg Groups

Time frame:Baseline and Week 32

concentration, descriptive

Other/protocol endpoint

Change From Baseline in CSF Amyloid-beta x-42 Concentration at Week 32 for AAB-003 8 mg/kg and Placebo Groups

Time frame:Baseline and Week 32

change from baseline, improvement

Other/protocol endpoint

CSF Amyloid-beta x-42 Concentration at Baseline and Week 32 for AAB-003 2 mg/kg and 4 mg/kg Groups

Time frame:Baseline and Week 32

concentration, descriptive

Other/protocol endpoint

Maximum Observed Plasma Concentration (Cmax) for Amyloid-Beta x-40

Time frame:Weeks 1, 3, 6, 10, 13 (pre-dose, 1 hour [end of infusion]), Week 26 (pre-dose, 1 hour [end of infusion], 1.5, 2, 4, 6, and 24 hours post start of infusion), and Weeks 32 and 39.

concentration, descriptive

Other/protocol endpoint

Time to Reach Maximum Observed Plasma Concentration (Tmax) for Amyloid-Beta x-40

Time frame:Weeks 1, 3, 6, 10, 13 (pre-dose, 1 hour [end of infusion]), Week 26 (pre-dose, 1 hour [end of infusion], 1.5, 2, 4, 6, and 24 hours post start of infusion), and Weeks 32 and 39.

time to event, event

Other/protocol endpoint

Area Under the Curve From Time Zero to Last Quantifiable Concentration (AUClast) for Amyloid-Beta x-40

Time frame:Baseline; Day 2 (24 hours post start of infusion); Weeks 1, 6, and 13 (pre-dose, 1 hour [end of infusion]), Week 26 (pre-dose, 1 hour [end of infusion], 1.5, 2, 4, 6, and 24 hours post start of infusion), and Weeks 32 and 39.

concentration, descriptive

Other/protocol endpoint

Area Under the Curve From Time Zero to Extrapolated Infinite Time (AUCinf) for Amyloid-Beta x-40

Time frame:Baseline; Day 2 (24 hours post start of infusion); Weeks 1, 6, and 13 (pre-dose, 1 hour [end of infusion]), Week 26 (pre-dose, 1 hour [end of infusion], 1.5, 2, 4, 6, and 24 hours post start of infusion), and Weeks 32 and 39.

descriptive

Other/protocol endpoint

Area Under the Curve From Time Zero to End of Dosing Interval (AUCtau) for Amyloid-Beta x-40

Time frame:Weeks 1, 3, 6, 10, 13 (pre-dose, 1 hour [end of infusion]), Week 26 (pre-dose, 1 hour [end of infusion], 1.5, 2, 4, 6, and 24 hours post start of infusion), and Weeks 32 and 39.

descriptive

Other/protocol endpoint

Plasma Decay Half-Life (t1/2) for Amyloid-Beta x-40

Time frame:Baseline; Day 2 (24 hours post start of infusion); Weeks 1, 6, and 13 (pre-dose, 1 hour [end of infusion]), Week 26 (pre-dose, 1 hour [end of infusion], 1.5, 2, 4, 6, and 24 hours post start of infusion), and Weeks 32 and 39.

concentration, descriptive

Other_pre_specified/registry result

Change From Baseline in CSF Amyloid-beta x-40 Concentration at Week 32 for AAB-003 8 mg/kg and Placebo Groups

Time frame:Baseline and Week 32

change from baseline, improvement

Posted result

GroupValue (mean), picogram/milliliter (pg/mL)Standard deviation
AAB-003 8 mg/kgn=15 Participants113.53817.270
Placebon=5 Participants348.641321.047
Mean change113.5380% CI-170.30 - 397.35p0.599t-test, 2 sided

Change from baseline, within group

Other_pre_specified/registry result

CSF Amyloid-beta x-40 Concentration at Baseline and Week 32 for AAB-003 2 mg/kg and 4 mg/kg Groups

Time frame:Baseline and Week 32

concentration, descriptive

Posted result

GroupValue (mean), picogram/milliliter (pg/mL)Standard deviation
AAB-003 2 mg/kgBaselinen=1 Participants5685.4NA
Week 32n=1 Participants5836.1NA
AAB-003 4 mg/kgBaselinen=1 Participants7413.6NA
Week 32n=1 Participants8883.2NA
Other_pre_specified/registry result

Change From Baseline in CSF Amyloid-beta x-42 Concentration at Week 32 for AAB-003 8 mg/kg and Placebo Groups

Time frame:Baseline and Week 32

change from baseline, improvement

Posted result

GroupValue (mean), pg/mLStandard deviation
AAB-003 8 mg/kgn=15 Participants48.85174.589
Placebon=5 Participants24.04173.610
Mean change48.8580% CI-11.79 - 109.48p0.297t-test, 2 sided

Change from baseline, within group

Other_pre_specified/registry result

CSF Amyloid-beta x-42 Concentration at Baseline and Week 32 for AAB-003 2 mg/kg and 4 mg/kg Groups

Time frame:Baseline and Week 32

concentration, descriptive

Posted result

GroupValue (mean), pg/mLStandard deviation
AAB-003 2 mg/kgBaselinen=1 Participants485.6NA
Week 32n=1 Participants343.3NA
AAB-003 4 mg/kgBaselinen=1 Participants217.2NA
Week 32n=1 Participants331NA
Other_pre_specified/registry result

Maximum Observed Plasma Concentration (Cmax) for Amyloid-Beta x-40

Time frame:Weeks 1, 3, 6, 10, 13 (pre-dose, 1 hour [end of infusion]), Week 26 (pre-dose, 1 hour [end of infusion], 1.5, 2, 4, 6, and 24 hours post start of infusion), and Weeks 32 and 39.

concentration, descriptive

Posted result

GroupValue (geometric_mean), ng/mLGeometric coefficient of variation
AAB-003 0.5 mg/kgWeek 1 - Week 13 (n=6,5,14,16,22,19)n=6 Participants3.32150
Week 26 - Week 39 (n=5,4,14,14,17,14)n=6 Participants1.96435
AAB-003 1 mg/kgWeek 1 - Week 13 (n=6,5,14,16,22,19)n=6 Participants6.95929
Week 26 - Week 39 (n=5,4,14,14,17,14)n=6 Participants3.80531
AAB-003 2 mg/kgWeek 1 - Week 13 (n=6,5,14,16,22,19)n=16 Participants8.20219
Week 26 - Week 39 (n=5,4,14,14,17,14)n=16 Participants3.80423
AAB-003 4 mg/kgWeek 1 - Week 13 (n=6,5,14,16,22,19)n=17 Participants11.8910
Week 26 - Week 39 (n=5,4,14,14,17,14)n=17 Participants7.53726
AAB-003 8 mg/kgWeek 1 - Week 13 (n=6,5,14,16,22,19)n=24 Participants18.0319
Week 26 - Week 39 (n=5,4,14,14,17,14)n=24 Participants12.2520
PlaceboWeek 1 - Week 13 (n=6,5,14,16,22,19)n=19 Participants0.351125
Week 26 - Week 39 (n=5,4,14,14,17,14)n=19 Participants0.468984
Other_pre_specified/registry result

Time to Reach Maximum Observed Plasma Concentration (Tmax) for Amyloid-Beta x-40

Time frame:Weeks 1, 3, 6, 10, 13 (pre-dose, 1 hour [end of infusion]), Week 26 (pre-dose, 1 hour [end of infusion], 1.5, 2, 4, 6, and 24 hours post start of infusion), and Weeks 32 and 39.

time to event, event

Posted result

GroupValue (median), HoursReported spread / bounds
AAB-003 0.5 mg/kgWeek 1 - Week 13 (n=6,5,14,16,22,19)n=6 Participants24.25022.3 - 149
Week 26 - Week 39 (n=5,4,14,14,17,14)n=6 Participants2.03352.02 - 596
AAB-003 1 mg/kgWeek 1 - Week 13 (n=6,5,14,16,22,19)n=5 Participants24.02924.0 - 169
Week 26 - Week 39 (n=5,4,14,14,17,14)n=5 Participants2.00312.00 - 2.02
AAB-003 2 mg/kgWeek 1 - Week 13 (n=6,5,14,16,22,19)n=15 Participants24.01924.0 - 170
Week 26 - Week 39 (n=5,4,14,14,17,14)n=15 Participants983232.00 - 1080
AAB-003 4 mg/kgWeek 1 - Week 13 (n=6,5,14,16,22,19)n=16 Participants1661024.0 - 238
Week 26 - Week 39 (n=5,4,14,14,17,14)n=16 Participants101026958 - 1060
AAB-003 8 mg/kgWeek 1 - Week 13 (n=6,5,14,16,22,19)n=22 Participants1641992.2 - 1050
Week 26 - Week 39 (n=5,4,14,14,17,14)n=22 Participants1010201.98 - 1080
PlaceboWeek 1 - Week 13 (n=6,5,14,16,22,19)n=19 Participants168250.000 - 2540
Week 26 - Week 39 (n=5,4,14,14,17,14)n=19 Participants1030840.000 - 2210
Other_pre_specified/registry result

Area Under the Curve From Time Zero to Last Quantifiable Concentration (AUClast) for Amyloid-Beta x-40

Time frame:Baseline; Day 2 (24 hours post start of infusion); Weeks 1, 6, and 13 (pre-dose, 1 hour [end of infusion]), Week 26 (pre-dose, 1 hour [end of infusion], 1.5, 2, 4, 6, and 24 hours post start of infusion), and Weeks 32 and 39.

concentration, descriptive

Posted result

GroupValue (geometric_mean), ng*hr/mLReported spread / bounds
AAB-003 0.5 mg/kgn=6 Participants26643122.3 - 149
AAB-003 1 mg/kgn=5 Participants60414724.0 - 169
AAB-003 2 mg/kgn=14 Participants78361924.0 - 170
AAB-003 4 mg/kgn=16 Participants129701724.0 - 238
AAB-003 8 mg/kgn=22 Participants229102592.2 - 1050
Placebon=19 Participants639.7230.000 - 2540
Other_pre_specified/registry result

Area Under the Curve From Time Zero to Extrapolated Infinite Time (AUCinf) for Amyloid-Beta x-40

Time frame:Baseline; Day 2 (24 hours post start of infusion); Weeks 1, 6, and 13 (pre-dose, 1 hour [end of infusion]), Week 26 (pre-dose, 1 hour [end of infusion], 1.5, 2, 4, 6, and 24 hours post start of infusion), and Weeks 32 and 39.

descriptive

Posted result

GroupValue (geometric_mean), ng*hr/mLGeometric coefficient of variation
AAB-003 0.5 mg/kgn=1 Participants2916NA
AAB-003 1 mg/kgn=1 Participants5463NA
AAB-003 2 mg/kgn=9 Participants896519
AAB-003 4 mg/kgn=2 Participants128001
Other_pre_specified/registry result

Area Under the Curve From Time Zero to End of Dosing Interval (AUCtau) for Amyloid-Beta x-40

Time frame:Weeks 1, 3, 6, 10, 13 (pre-dose, 1 hour [end of infusion]), Week 26 (pre-dose, 1 hour [end of infusion], 1.5, 2, 4, 6, and 24 hours post start of infusion), and Weeks 32 and 39.

descriptive

Posted result

GroupValue (geometric_mean), ng*hr/mLReported spread / bounds
AAB-003 0.5 mg/kgWeek 1 - Week 13 (n=6,5,14,16,22,19)n=6 Participants26473122.3 - 149
Week 26 - Week 39 (n=5,4,14,14,17,14)n=6 Participants2614322.02 - 596
AAB-003 1 mg/kgWeek 1 - Week 13 (n=6,5,14,16,22,19)n=5 Participants60574724.0 - 169
Week 26 - Week 39 (n=5,4,14,14,17,14)n=5 Participants4929372.00 - 2.02
AAB-003 2 mg/kgWeek 1 - Week 13 (n=6,5,14,16,22,19)n=15 Participants78541924.0 - 170
Week 26 - Week 39 (n=5,4,14,14,17,14)n=15 Participants6119312.00 - 1080
AAB-003 4 mg/kgWeek 1 - Week 13 (n=6,5,14,16,22,19)n=16 Participants129401724.0 - 238
Week 26 - Week 39 (n=5,4,14,14,17,14)n=16 Participants1191026958 - 1060
AAB-003 8 mg/kgWeek 1 - Week 13 (n=6,5,14,16,22,19)n=22 Participants228202692.2 - 1050
Week 26 - Week 39 (n=5,4,14,14,17,14)n=22 Participants19740251.98 - 1080
PlaceboWeek 1 - Week 13 (n=6,5,14,16,22,19)n=19 Participants631.6230.000 - 2540
Week 26 - Week 39 (n=5,4,14,14,17,14)n=19 Participants798.8550.000 - 2210
Other_pre_specified/registry result

Plasma Decay Half-Life (t1/2) for Amyloid-Beta x-40

Time frame:Baseline; Day 2 (24 hours post start of infusion); Weeks 1, 6, and 13 (pre-dose, 1 hour [end of infusion]), Week 26 (pre-dose, 1 hour [end of infusion], 1.5, 2, 4, 6, and 24 hours post start of infusion), and Weeks 32 and 39.

concentration, descriptive

Posted result

GroupValue (mean), DayStandard deviation
AAB-003 0.5 mg/kgn=1 Participants26.57NA
AAB-003 1 mg/kgn=1 Participants32.14NA
AAB-003 2 mg/kgn=9 Participants30.713.2303
AAB-003 4 mg/kgn=2 Participants29.415.7374

Tau biomarkers

4 endpoints
Other/protocol endpoint

Change From Baseline in CSF P-tau Concentration at Week 32 for AAB-003 8 mg/kg and Placebo Groups

Time frame:Baseline and Week 32

change from baseline, improvement

Other/protocol endpoint

CSF P-tau Concentration at Baseline and Week 32 for AAB-003 2 mg/kg and 4 mg/kg Groups

Time frame:Baseline and Week 32

concentration, descriptive

Other_pre_specified/registry result

Change From Baseline in CSF P-tau Concentration at Week 32 for AAB-003 8 mg/kg and Placebo Groups

Time frame:Baseline and Week 32

change from baseline, improvement

Posted result

GroupValue (mean), pg/mLStandard deviation
AAB-003 8 mg/kgn=15 Participants1.238.986
Placebon=5 Participants1.927.755
Mean change1.2380% CI-1.89 - 4.35p0.603t-test, 2 sided

Change from baseline, within group

Other_pre_specified/registry result

CSF P-tau Concentration at Baseline and Week 32 for AAB-003 2 mg/kg and 4 mg/kg Groups

Time frame:Baseline and Week 32

concentration, descriptive

Posted result

GroupValue (mean), pg/mLStandard deviation
AAB-003 2 mg/kgBaselinen=1 Participants89NA
Week 32n=1 Participants100.3NA
AAB-003 4 mg/kgBaselinen=1 Participants122.7NA
Week 32n=1 Participants140.5NA

Neuroimaging

4 endpoints
Primary/protocol endpoint

Number of Participants With New Occurrence of Brain Magnetic Resonance Imaging (MRI) Finding

Time frame:Baseline up to Week 32.

event count, event

Primary/protocol endpoint

Number of Participants With Vasogenic Edema of All Severity After Each Infusion Visit

Time frame:Day 1, Week 13, and Week 26

event count, event

Primary/registry result

Number of Participants With New Occurrence of Brain Magnetic Resonance Imaging (MRI) Finding

Time frame:Baseline up to Week 32.

event count, event

Posted result

GroupValue (number), ParticipantsReported bounds
AAB-003 0.5 mg/kgn=6 Participants0-
AAB-003 1 mg/kgn=6 Participants0-
AAB-003 2 mg/kgn=16 Participants0-
AAB-003 4 mg/kgn=17 Participants0-
AAB-003 8 mg/kgn=24 Participants5-
Placebon=19 Participants0-
Primary/registry result

Number of Participants With Vasogenic Edema of All Severity After Each Infusion Visit

Time frame:Day 1, Week 13, and Week 26

event count, event

Posted result

GroupValue (number), ParticipantsReported bounds
AAB-003 0.5 mg/kgDay 1 (n=6,6,16,17,24,19)n=6 Participants0-
Week 13 (n=6,5,15,16,21,17)n=6 Participants0-
Week 26 (n=6,5,14,14,17,16)n=6 Participants0-
AAB-003 1 mg/kgDay 1 (n=6,6,16,17,24,19)n=6 Participants0-
Week 13 (n=6,5,15,16,21,17)n=6 Participants0-
Week 26 (n=6,5,14,14,17,16)n=6 Participants0-
AAB-003 2 mg/kgDay 1 (n=6,6,16,17,24,19)n=16 Participants0-
Week 13 (n=6,5,15,16,21,17)n=16 Participants0-
Week 26 (n=6,5,14,14,17,16)n=16 Participants0-
AAB-003 4 mg/kgDay 1 (n=6,6,16,17,24,19)n=17 Participants0-
Week 13 (n=6,5,15,16,21,17)n=17 Participants0-
Week 26 (n=6,5,14,14,17,16)n=17 Participants0-
AAB-003 8 mg/kgDay 1 (n=6,6,16,17,24,19)n=24 Participants1-
Week 13 (n=6,5,15,16,21,17)n=24 Participants1-
Week 26 (n=6,5,14,14,17,16)n=24 Participants0-
PlaceboDay 1 (n=6,6,16,17,24,19)n=19 Participants0-
Week 13 (n=6,5,15,16,21,17)n=19 Participants0-
Week 26 (n=6,5,14,14,17,16)n=19 Participants0-

Fluid / digital biomarkers

6 endpoints
Other/protocol endpoint

Cerebrospinal Fluid (CSF) Concentration of AAB-003 at Week 32

Time frame:Week 32 or Early Withdrawal

concentration, descriptive

Other/protocol endpoint

Change From Baseline in CSF Tau Concentration at Week 32 for AAB-003 8 mg/kg and Placebo Groups

Time frame:Baseline and Week 32

change from baseline, improvement

Other/protocol endpoint

CSF Tau Concentration at Baseline and Week 32 for AAB-003 2 mg/kg and 4 mg/kg Groups

Time frame:Baseline and Week 32

concentration, descriptive

Other_pre_specified/registry result

Cerebrospinal Fluid (CSF) Concentration of AAB-003 at Week 32

Time frame:Week 32 or Early Withdrawal

concentration, descriptive

Posted result

GroupValue (mean), nanogram/millliter (ng/mL)Standard deviation
AAB-003 2 mg/kgn=1 Participants15.220NA
AAB-003 4 mg/kgn=1 Participants45.020NA
AAB-003 8 mg/kgn=15 Participants79.16053.0486
Other_pre_specified/registry result

Change From Baseline in CSF Tau Concentration at Week 32 for AAB-003 8 mg/kg and Placebo Groups

Time frame:Baseline and Week 32

change from baseline, improvement

Posted result

GroupValue (mean), pg/mLStandard deviation
AAB-003 8 mg/kgn=15 Participants-15.26110.229
Placebon=5 Participants67.9463.514
Mean change-15.2680% CI-53.54 - 23.02p0.600t-test, 2 sided

Change from baseline, within group

Other_pre_specified/registry result

CSF Tau Concentration at Baseline and Week 32 for AAB-003 2 mg/kg and 4 mg/kg Groups

Time frame:Baseline and Week 32

concentration, descriptive

Posted result

GroupValue (mean), pg/mLStandard deviation
AAB-003 2 mg/kgBaselinen=1 Participants659.6NA
Week 32n=1 Participants739.4NA
AAB-003 4 mg/kgBaselinen=1 Participants856.1NA
Week 32n=1 Participants1115.6NA

Safety / tolerability / PK

18 endpoints
Primary/protocol endpoint

Number of Participants With Treatment-Emergent Adverse Events (TEAEs)

Time frame:Baseline up to 39 Weeks and at Early Withdrawal

event count, event

Primary/protocol endpoint

Number of Participants With Vital Signs of Potential Clinical Concern

Time frame:Baseline up to 39 Weeks and at Early Withdrawal

change from baseline, event

Primary/protocol endpoint

Maximum Observed Serum Concentration (Cmax) for AAB-003 at Day 1

Time frame:Pre-dose, 1 hour (end of infusion), 1.5, 2, 4 and 6 hours post start of infusion.

concentration, descriptive

Primary/protocol endpoint

Maximum Observed Serum Concentration (Cmax) for AAB-003 at at Week 26

Time frame:Pre-dose, 1 hour (end of infusion), 1.5, 2, 4, 6, and 24 hours post start of infusion.

concentration, descriptive

Primary/protocol endpoint

Time to Reach Maximum Observed Serum Concentration (Tmax) for AAB-003 at Day 1

Time frame:Pre-dose, 1 hour (end of infusion), 1.5, 2, 4 and 6 hours post start of infusion.

time to event, event

Primary/protocol endpoint

Time to Reach Maximum Observed Serum Concentration (Tmax) for AAB-003 at Week 26

Time frame:Pre-dose, 1 hour (end of infusion), 1.5, 2, 4, 6, and 24 hours post start of infusion.

time to event, event

Primary/registry result

Number of Participants With Treatment-Emergent Adverse Events (TEAEs)

Time frame:Baseline up to 39 Weeks and at Early Withdrawal

event count, event

Posted result

GroupValue (number), ParticipantsReported bounds
AAB-003 0.5 mg/kgParticipants with Adverse Events (AEs)n=6 Participants5-
Participants with Serious Adverse Events (SAEs)n=6 Participants1-
Participants Discontinued due to AEsn=6 Participants0-
AAB-003 1 mg/kgParticipants with Adverse Events (AEs)n=6 Participants3-
Participants with Serious Adverse Events (SAEs)n=6 Participants1-
Participants Discontinued due to AEsn=6 Participants0-
AAB-003 2 mg/kgParticipants with Adverse Events (AEs)n=16 Participants10-
Participants with Serious Adverse Events (SAEs)n=16 Participants1-
Participants Discontinued due to AEsn=16 Participants0-
AAB-003 4 mg/kgParticipants with Adverse Events (AEs)n=17 Participants8-
Participants with Serious Adverse Events (SAEs)n=17 Participants0-
Participants Discontinued due to AEsn=17 Participants0-
AAB-003 8 mg/kgParticipants with Adverse Events (AEs)n=24 Participants16-
Participants with Serious Adverse Events (SAEs)n=24 Participants5-
Participants Discontinued due to AEsn=24 Participants3-
PlaceboParticipants with Adverse Events (AEs)n=19 Participants12-
Participants with Serious Adverse Events (SAEs)n=19 Participants0-
Participants Discontinued due to AEsn=19 Participants1-
Primary/registry result

Number of Participants With Vital Signs of Potential Clinical Concern

Time frame:Baseline up to 39 Weeks and at Early Withdrawal

change from baseline, event

Posted result

GroupValue (number), ParticipantsReported bounds
AAB-003 0.5 mg/kgSupine SBP <90 mm Hgn=6 Participants0-
Maximum increase in supine SBP >=30 mm Hgn=6 Participants3-
Maximum decrease in supine SBP >=30 mm Hgn=6 Participants0-
Sitting SBP <90 mm Hgn=6 ParticipantsNA-
Supine DBP <50 mm Hgn=6 Participants0-
Maximum increase in supine DBP >=20 mm Hgn=6 Participants2-
Maximum decrease in supine DBP >=20 mm Hgn=6 Participants1-
Sitting DBP <50 mm Hgn=6 ParticipantsNA-
Supine pulse rate <40 or >120 bpmn=6 Participants0-
Sitting pulse rate <40 or >120 bpmn=6 ParticipantsNA-
AAB-003 1 mg/kgSupine SBP <90 mm Hgn=6 Participants0-
Maximum increase in supine SBP >=30 mm Hgn=6 Participants0-
Maximum decrease in supine SBP >=30 mm Hgn=6 Participants0-
Sitting SBP <90 mm Hgn=6 ParticipantsNA-
Supine DBP <50 mm Hgn=6 Participants0-
Maximum increase in supine DBP >=20 mm Hgn=6 Participants3-
Maximum decrease in supine DBP >=20 mm Hgn=6 Participants0-
Sitting DBP <50 mm Hgn=6 ParticipantsNA-
Supine pulse rate <40 or >120 bpmn=6 Participants0-
Sitting pulse rate <40 or >120 bpmn=6 ParticipantsNA-
AAB-003 2 mg/kgSupine SBP <90 mm Hgn=16 Participants1-
Maximum increase in supine SBP >=30 mm Hgn=16 Participants3-
Maximum decrease in supine SBP >=30 mm Hgn=16 Participants5-
Sitting SBP <90 mm Hgn=16 ParticipantsNA-
Supine DBP <50 mm Hgn=16 Participants0-
Maximum increase in supine DBP >=20 mm Hgn=16 Participants4-
Maximum decrease in supine DBP >=20 mm Hgn=16 Participants4-
Sitting DBP <50 mm Hgn=16 ParticipantsNA-
Supine pulse rate <40 or >120 bpmn=16 Participants0-
Sitting pulse rate <40 or >120 bpmn=16 ParticipantsNA-
AAB-003 4 mg/kgSupine SBP <90 mm Hgn=17 Participants0-
Maximum increase in supine SBP >=30 mm Hgn=17 Participants7-
Maximum decrease in supine SBP >=30 mm Hgn=17 Participants0-
Sitting SBP <90 mm Hgn=17 ParticipantsNA-
Supine DBP <50 mm Hgn=17 Participants0-
Maximum increase in supine DBP >=20 mm Hgn=17 Participants2-
Maximum decrease in supine DBP >=20 mm Hgn=17 Participants1-
Sitting DBP <50 mm Hgn=17 ParticipantsNA-
Supine pulse rate <40 or >120 bpmn=17 Participants0-
Sitting pulse rate <40 or >120 bpmn=17 ParticipantsNA-
AAB-003 8 mg/kgSupine SBP <90 mm Hgn=24 Participants1-
Maximum increase in supine SBP >=30 mm Hgn=24 Participants2-
Maximum decrease in supine SBP >=30 mm Hgn=24 Participants4-
Sitting SBP <90 mm Hgn=24 Participants0-
Supine DBP <50 mm Hgn=24 Participants0-
Maximum increase in supine DBP >=20 mm Hgn=24 Participants5-
Maximum decrease in supine DBP >=20 mm Hgn=24 Participants4-
Sitting DBP <50 mm Hgn=24 Participants0-
Supine pulse rate <40 or >120 bpmn=24 Participants0-
Sitting pulse rate <40 or >120 bpmn=24 Participants0-
PlaceboSupine SBP <90 mm Hgn=19 Participants0-
Maximum increase in supine SBP >=30 mm Hgn=19 Participants6-
Maximum decrease in supine SBP >=30 mm Hgn=19 Participants8-
Sitting SBP <90 mm Hgn=19 Participants0-
Supine DBP <50 mm Hgn=19 Participants1-
Maximum increase in supine DBP >=20 mm Hgn=19 Participants8-
Maximum decrease in supine DBP >=20 mm Hgn=19 Participants8-
Sitting DBP <50 mm Hgn=19 Participants0-
Supine pulse rate <40 or >120 bpmn=19 Participants0-
Sitting pulse rate <40 or >120 bpmn=19 Participants0-
Primary/registry result

Maximum Observed Serum Concentration (Cmax) for AAB-003 at Day 1

Time frame:Pre-dose, 1 hour (end of infusion), 1.5, 2, 4 and 6 hours post start of infusion.

concentration, descriptive

Posted result

GroupValue (geometric_mean), microgram per milliliter (mcg/mL)Geometric coefficient of variation
AAB-003 0.5 mg/kgn=6 Participants13.7948
AAB-003 1 mg/kgn=6 Participants32.0533
AAB-003 2 mg/kgn=16 Participants58.7421
AAB-003 4 mg/kgn=17 Participants122.414
AAB-003 8 mg/kgn=24 Participants223.728
Primary/protocol endpoint

Serum Decay Half-Life (t1/2) for AAB-003 at Day 1

Time frame:Pre-dose, 1 hour (end of infusion), 1.5, 2, 4 and 6 hours post start of infusion.

concentration, descriptive

Primary/registry result

Maximum Observed Serum Concentration (Cmax) for AAB-003 at at Week 26

Time frame:Pre-dose, 1 hour (end of infusion), 1.5, 2, 4, 6, and 24 hours post start of infusion.

concentration, descriptive

Posted result

GroupValue (geometric_mean), mcg/mLGeometric coefficient of variation
AAB-003 0.5 mg/kgn=6 Participants14.5333
AAB-003 1 mg/kgn=5 Participants38.5125
AAB-003 2 mg/kgn=14 Participants60.1738
AAB-003 4 mg/kgn=14 Participants108.541
AAB-003 8 mg/kgn=17 Participants228.930
Primary/protocol endpoint

Serum Decay Half-Life (t1/2) for AAB-003 at Week 26

Time frame:Pre-dose, 1 hour (end of infusion), 1.5, 2, 4, 6, and 24 hours post start of infusion.

concentration, descriptive

Primary/registry result

Time to Reach Maximum Observed Serum Concentration (Tmax) for AAB-003 at Day 1

Time frame:Pre-dose, 1 hour (end of infusion), 1.5, 2, 4 and 6 hours post start of infusion.

time to event, event

Posted result

GroupValue (median), Hours (hr)Reported spread / bounds
AAB-003 0.5 mg/kgn=6 Participants1.92301.50 - 6.05
AAB-003 1 mg/kgn=6 Participants4.00332.17 - 6.02
AAB-003 2 mg/kgn=16 Participants1.54161.20 - 2.12
AAB-003 4 mg/kgn=17 Participants1.50201.00 - 24.0
AAB-003 8 mg/kgn=24 Participants3.02241.07 - 6.00
Primary/registry result

Time to Reach Maximum Observed Serum Concentration (Tmax) for AAB-003 at Week 26

Time frame:Pre-dose, 1 hour (end of infusion), 1.5, 2, 4, 6, and 24 hours post start of infusion.

time to event, event

Posted result

GroupValue (median), Hours (hr)Reported spread / bounds
AAB-003 0.5 mg/kgn=6 Participants1.56221.30 - 4.05
AAB-003 1 mg/kgn=5 Participants2.0091.25 - 5.95
AAB-003 2 mg/kgn=14 Participants1.64281.05 - 6.03
AAB-003 4 mg/kgn=14 Participants2.00291.03 - 6.03
AAB-003 8 mg/kgn=17 Participants1.50341.07 - 23.9
Primary/protocol endpoint

Number of Participants With Change From Baseline and Absolute Values in Electrocardiogram (ECG) Meeting Categorical Summarization Criteria

Time frame:Baseline, Weeks 1,13,16,26,39 or Early Withdrawal

change from baseline, event

Primary/registry result

Serum Decay Half-Life (t1/2) for AAB-003 at Day 1

Time frame:Pre-dose, 1 hour (end of infusion), 1.5, 2, 4 and 6 hours post start of infusion.

concentration, descriptive

Posted result

GroupValue (mean), DaysStandard deviation
AAB-003 0.5 mg/kgn=4 Participants27.776.9880
AAB-003 1 mg/kgn=3 Participants20.048.9210
AAB-003 2 mg/kgn=14 Participants24.454.8686
AAB-003 4 mg/kgn=14 Participants21.105.2000
AAB-003 8 mg/kgn=19 Participants22.894.5086
Primary/registry result

Serum Decay Half-Life (t1/2) for AAB-003 at Week 26

Time frame:Pre-dose, 1 hour (end of infusion), 1.5, 2, 4, 6, and 24 hours post start of infusion.

concentration, descriptive

Posted result

GroupValue (mean), DaysStandard deviation
AAB-003 0.5 mg/kgn=5 Participants23.416.8638
AAB-003 1 mg/kgn=4 Participants22.323.1454
AAB-003 2 mg/kgn=13 Participants22.834.1356
AAB-003 4 mg/kgn=11 Participants22.273.2448
AAB-003 8 mg/kgn=16 Participants22.814.3455
Primary/registry result

Number of Participants With Change From Baseline and Absolute Values in Electrocardiogram (ECG) Meeting Categorical Summarization Criteria

Time frame:Baseline, Weeks 1,13,16,26,39 or Early Withdrawal

change from baseline, event

Posted result

GroupValue (number), ParticipantsReported bounds
AAB-003 0.5 mg/kgMaximum PR Interval >=300 msecn=6 Participants0-
Maximum QRS Complex >=200 msecn=6 Participants0-
Maximum QTcF Interval 450 to <480 msecn=6 Participants0-
Maximum QTcF Interval 480 to <500 msecn=6 Participants0-
Maximum QTcF Interval >=500 msecn=6 Participants0-
PR Interval >=25/50% increasen=6 Participants0-
QRS Complex >=25/50% increasen=6 Participants0-
Maximum QTcF Increase from Baseline 30 to <60 msecn=6 Participants2-
Maximum QTcF Interval Increase >=60 msecn=6 Participants0-
AAB-003 1 mg/kgMaximum PR Interval >=300 msecn=6 Participants0-
Maximum QRS Complex >=200 msecn=6 Participants0-
Maximum QTcF Interval 450 to <480 msecn=6 Participants2-
Maximum QTcF Interval 480 to <500 msecn=6 Participants0-
Maximum QTcF Interval >=500 msecn=6 Participants0-
PR Interval >=25/50% increasen=6 Participants0-
QRS Complex >=25/50% increasen=6 Participants0-
Maximum QTcF Increase from Baseline 30 to <60 msecn=6 Participants1-
Maximum QTcF Interval Increase >=60 msecn=6 Participants0-
AAB-003 2 mg/kgMaximum PR Interval >=300 msecn=16 Participants0-
Maximum QRS Complex >=200 msecn=16 Participants0-
Maximum QTcF Interval 450 to <480 msecn=16 Participants5-
Maximum QTcF Interval 480 to <500 msecn=16 Participants1-
Maximum QTcF Interval >=500 msecn=16 Participants0-
PR Interval >=25/50% increasen=16 Participants0-
QRS Complex >=25/50% increasen=16 Participants0-
Maximum QTcF Increase from Baseline 30 to <60 msecn=16 Participants2-
Maximum QTcF Interval Increase >=60 msecn=16 Participants0-
AAB-003 4 mg/kgMaximum PR Interval >=300 msecn=17 Participants0-
Maximum QRS Complex >=200 msecn=17 Participants0-
Maximum QTcF Interval 450 to <480 msecn=17 Participants4-
Maximum QTcF Interval 480 to <500 msecn=17 Participants0-
Maximum QTcF Interval >=500 msecn=17 Participants0-
PR Interval >=25/50% increasen=17 Participants0-
QRS Complex >=25/50% increasen=17 Participants0-
Maximum QTcF Increase from Baseline 30 to <60 msecn=17 Participants1-
Maximum QTcF Interval Increase >=60 msecn=17 Participants0-
AAB-003 8 mg/kgMaximum PR Interval >=300 msecn=24 Participants0-
Maximum QRS Complex >=200 msecn=24 Participants0-
Maximum QTcF Interval 450 to <480 msecn=24 Participants4-
Maximum QTcF Interval 480 to <500 msecn=24 Participants1-
Maximum QTcF Interval >=500 msecn=24 Participants0-
PR Interval >=25/50% increasen=24 Participants0-
QRS Complex >=25/50% increasen=24 Participants0-
Maximum QTcF Increase from Baseline 30 to <60 msecn=24 Participants2-
Maximum QTcF Interval Increase >=60 msecn=24 Participants0-
PlaceboMaximum PR Interval >=300 msecn=19 Participants0-
Maximum QRS Complex >=200 msecn=19 Participants0-
Maximum QTcF Interval 450 to <480 msecn=19 Participants3-
Maximum QTcF Interval 480 to <500 msecn=19 Participants0-
Maximum QTcF Interval >=500 msecn=19 Participants0-
PR Interval >=25/50% increasen=19 Participants0-
QRS Complex >=25/50% increasen=19 Participants1-
Maximum QTcF Increase from Baseline 30 to <60 msecn=19 Participants3-
Maximum QTcF Interval Increase >=60 msecn=19 Participants0-

Other (unclassified)

26 endpoints
Primary/protocol endpoint/low confidence

Number of Participants With Laboratory Abnormalities

Time frame:Baseline up to 39 Weeks and at Early Withdrawal

event count, event

Primary/protocol endpoint/low confidence

Number of Participants With Abnormal Physical Examination Findings

Time frame:Baseline up to 39 Weeks and at Early Withdrawal

event count, event

Primary/protocol endpoint/low confidence

Average Concentration (Cavg) for AAB-003 in Serum at Day 1

Time frame:Pre-dose, 1 hour (end of infusion), 1.5, 2, 4 and 6 hours post start of infusion.

concentration, descriptive

Primary/protocol endpoint/low confidence

Average Concentration (Cavg) for AAB-003 in Serum at Week 26

Time frame:Pre-dose, 1 hour (end of infusion), 1.5, 2, 4, 6, and 24 hours post start of infusion.

concentration, descriptive

Primary/protocol endpoint/low confidence

Area Under the Curve From Time Zero to Last Quantifiable Concentration (AUClast) for AAB-003 in Serum at Day 1

Time frame:Pre-dose, 1 hour (end of infusion), 1.5, 2, 4 and 6 hours post start of infusion.

concentration, descriptive

Primary/protocol endpoint/low confidence

Area Under the Curve From Time Zero to Extrapolated Infinite Time (AUCinf) for AAB-003 in Serum at Day 1

Time frame:Pre-dose, 1 hour (end of infusion), 1.5, 2, 4 and 6 hours post start of infusion.

descriptive

Primary/protocol endpoint/low confidence

Area Under the Curve From Time Zero to End of Dosing Interval (AUCtau) for AAB-003 in Serum at Day 1

Time frame:Pre-dose, 1 hour (end of infusion), 1.5, 2, 4 and 6 hours post start of infusion.

descriptive

Primary/protocol endpoint/low confidence

Area Under the Curve From Time Zero to End of Dosing Interval (AUCtau) for AAB-003 in Serum at Week 26

Time frame:Pre-dose, 1 hour (end of infusion), 1.5, 2, 4, 6, and 24 hours post start of infusion.

descriptive

Primary/registry result/low confidence

Number of Participants With Laboratory Abnormalities

Time frame:Baseline up to 39 Weeks and at Early Withdrawal

event count, event

Posted result

GroupValue (number), ParticipantsReported bounds
AAB-003 0.5 mg/kgn=6 Participants3-
AAB-003 1 mg/kgn=6 Participants3-
AAB-003 2 mg/kgn=16 Participants11-
AAB-003 4 mg/kgn=17 Participants10-
AAB-003 8 mg/kgn=24 Participants12-
Placebon=19 Participants13-
Primary/protocol endpoint/low confidence

Systemic Clearance (CL) for AAB-003 in Serum at Day 1

Time frame:Pre-dose, 1 hour (end of infusion), 1.5, 2, 4 and 6 hours post start of infusion.

descriptive

Primary/protocol endpoint/low confidence

Systemic Clearance (CL) for AAB-003 in Serum at Week 26

Time frame:Pre-dose, 1 hour (end of infusion), 1.5, 2, 4, 6, and 24 hours post start of infusion.

descriptive

Primary/registry result/low confidence

Number of Participants With Abnormal Physical Examination Findings

Time frame:Baseline up to 39 Weeks and at Early Withdrawal

event count, event

Posted result

GroupValue (number), ParticipantsReported bounds
AAB-003 0.5 mg/kgn=6 Participants2-
AAB-003 1 mg/kgn=6 Participants4-
AAB-003 2 mg/kgn=16 Participants1-
AAB-003 4 mg/kgn=17 Participants5-
AAB-003 8 mg/kgn=24 Participants9-
Placebon=19 Participants9-
Primary/protocol endpoint/low confidence

Volume of Distribution at Steady State (Vss) for AAB-003 in Serum at Day 1

Time frame:Pre-dose, 1 hour (end of infusion), 1.5, 2, 4 and 6 hours post start of infusion.

descriptive

Primary/protocol endpoint/low confidence

Volume of Distribution at Steady State (Vss) for AAB-003 in Serum at Week 26

Time frame:Pre-dose, 1 hour (end of infusion), 1.5, 2, 4, 6, and 24 hours post start of infusion.

descriptive

Primary/registry result/low confidence

Average Concentration (Cavg) for AAB-003 in Serum at Day 1

Time frame:Pre-dose, 1 hour (end of infusion), 1.5, 2, 4 and 6 hours post start of infusion.

concentration, descriptive

Posted result

GroupValue (geometric_mean), mcg/mLGeometric coefficient of variation
AAB-003 0.5 mg/kgn=6 Participants2.46530
AAB-003 1 mg/kgn=5 Participants6.54533
AAB-003 2 mg/kgn=15 Participants10.8316
AAB-003 4 mg/kgn=16 Participants20.3720
AAB-003 8 mg/kgn=22 Participants36.7824
Primary/registry result/low confidence

Average Concentration (Cavg) for AAB-003 in Serum at Week 26

Time frame:Pre-dose, 1 hour (end of infusion), 1.5, 2, 4, 6, and 24 hours post start of infusion.

concentration, descriptive

Posted result

GroupValue (geometric_mean), mcg/mLGeometric coefficient of variation
AAB-003 0.5 mg/kgn=6 Participants3.43522
AAB-003 1 mg/kgn=4 Participants7.1719
AAB-003 2 mg/kgn=14 Participants12.5628
AAB-003 4 mg/kgn=14 Participants22.5229
AAB-003 8 mg/kgn=17 Participants46.1234
Primary/registry result/low confidence

Area Under the Curve From Time Zero to Last Quantifiable Concentration (AUClast) for AAB-003 in Serum at Day 1

Time frame:Pre-dose, 1 hour (end of infusion), 1.5, 2, 4 and 6 hours post start of infusion.

concentration, descriptive

Posted result

GroupValue (geometric_mean), mcg*hr/mLGeometric coefficient of variation
AAB-003 0.5 mg/kgn=6 Participants539730
AAB-003 1 mg/kgn=6 Participants1347033
AAB-003 2 mg/kgn=16 Participants2296019
AAB-003 4 mg/kgn=17 Participants4400020
AAB-003 8 mg/kgn=24 Participants7913023
Primary/registry result/low confidence

Area Under the Curve From Time Zero to Extrapolated Infinite Time (AUCinf) for AAB-003 in Serum at Day 1

Time frame:Pre-dose, 1 hour (end of infusion), 1.5, 2, 4 and 6 hours post start of infusion.

descriptive

Posted result

GroupValue (geometric_mean), mcg*hr/mLGeometric coefficient of variation
AAB-003 0.5 mg/kgn=4 Participants559739
AAB-003 1 mg/kgn=3 Participants1306018
AAB-003 2 mg/kgn=14 Participants2527017
AAB-003 4 mg/kgn=14 Participants4643021
AAB-003 8 mg/kgn=19 Participants8214023
Primary/registry result/low confidence

Area Under the Curve From Time Zero to End of Dosing Interval (AUCtau) for AAB-003 in Serum at Day 1

Time frame:Pre-dose, 1 hour (end of infusion), 1.5, 2, 4 and 6 hours post start of infusion.

descriptive

Posted result

GroupValue (geometric_mean), mcg*hr/mLReported spread / bounds
AAB-003 0.5 mg/kgn=6 Participants5384301.50 - 6.05
AAB-003 1 mg/kgn=5 Participants14300332.17 - 6.02
AAB-003 2 mg/kgn=15 Participants23660161.20 - 2.12
AAB-003 4 mg/kgn=16 Participants44490201.00 - 24.0
AAB-003 8 mg/kgn=22 Participants80320241.07 - 6.00
Primary/registry result/low confidence

Area Under the Curve From Time Zero to End of Dosing Interval (AUCtau) for AAB-003 in Serum at Week 26

Time frame:Pre-dose, 1 hour (end of infusion), 1.5, 2, 4, 6, and 24 hours post start of infusion.

descriptive

Posted result

GroupValue (geometric_mean), mcg*hr/mLReported spread / bounds
AAB-003 0.5 mg/kgn=6 Participants7502221.30 - 4.05
AAB-003 1 mg/kgn=4 Participants1566091.25 - 5.95
AAB-003 2 mg/kgn=14 Participants27440281.05 - 6.03
AAB-003 4 mg/kgn=14 Participants49180291.03 - 6.03
AAB-003 8 mg/kgn=17 Participants100700341.07 - 23.9
Primary/registry result/low confidence

Systemic Clearance (CL) for AAB-003 in Serum at Day 1

Time frame:Pre-dose, 1 hour (end of infusion), 1.5, 2, 4 and 6 hours post start of infusion.

descriptive

Posted result

GroupValue (geometric_mean), milliliter/hour/kilogram (mL/hr/kg)Geometric coefficient of variation
AAB-003 0.5 mg/kgn=4 Participants0.0893439
AAB-003 1 mg/kgn=3 Participants0.0765718
AAB-003 2 mg/kgn=14 Participants0.0791417
AAB-003 4 mg/kgn=14 Participants0.0861521
AAB-003 8 mg/kgn=19 Participants0.0973923
Primary/registry result/low confidence

Systemic Clearance (CL) for AAB-003 in Serum at Week 26

Time frame:Pre-dose, 1 hour (end of infusion), 1.5, 2, 4, 6, and 24 hours post start of infusion.

descriptive

Posted result

GroupValue (geometric_mean), mL/hr/kgGeometric coefficient of variation
AAB-003 0.5 mg/kgn=6 Participants0.0666522
AAB-003 1 mg/kgn=4 Participants0.063859
AAB-003 2 mg/kgn=14 Participants0.0728928
AAB-003 4 mg/kgn=14 Participants0.0813329
AAB-003 8 mg/kgn=17 Participants0.0794334
Primary/registry result/low confidence

Volume of Distribution at Steady State (Vss) for AAB-003 in Serum at Day 1

Time frame:Pre-dose, 1 hour (end of infusion), 1.5, 2, 4 and 6 hours post start of infusion.

descriptive

Posted result

GroupValue (geometric_mean), mL/kgGeometric coefficient of variation
AAB-003 0.5 mg/kgn=4 Participants78.4438
AAB-003 1 mg/kgn=3 Participants59.7437
AAB-003 2 mg/kgn=14 Participants61.6721
AAB-003 4 mg/kgn=14 Participants60.4426
AAB-003 8 mg/kgn=19 Participants75.1227
Primary/registry result/low confidence

Volume of Distribution at Steady State (Vss) for AAB-003 in Serum at Week 26

Time frame:Pre-dose, 1 hour (end of infusion), 1.5, 2, 4, 6, and 24 hours post start of infusion.

descriptive

Posted result

GroupValue (geometric_mean), mL/kgGeometric coefficient of variation
AAB-003 0.5 mg/kgn=5 Participants54.6618
AAB-003 1 mg/kgn=4 Participants48.279
AAB-003 2 mg/kgn=13 Participants56.9037
AAB-003 4 mg/kgn=11 Participants65.1123
AAB-003 8 mg/kgn=16 Participants61.2446
Other/protocol endpoint/low confidence

Number of Participants With Positive Anti-product Antibody Response to AAB-003 in Serum

Time frame:Day 1 (predose), Week 13 (predose), Week 26 (predose) and Week 39 or Early Withdrawal

event count, event

Other_pre_specified/registry result/low confidence

Number of Participants With Positive Anti-product Antibody Response to AAB-003 in Serum

Time frame:Day 1 (predose), Week 13 (predose), Week 26 (predose) and Week 39 or Early Withdrawal

event count, event

Posted result

GroupValue (number), ParticipantsReported bounds
AAB-003 0.5 mg/kgDay 1 (n=6,6,16,17,24,19)n=6 Participants0-
Week 13 (n=6,5,15,16,22,19)n=6 Participants0-
Week 26 (n=6,5,14,14,17,18)n=6 Participants0-
Week 39 (n=6,4,14,14,19,16)n=6 Participants0-
AAB-003 1 mg/kgDay 1 (n=6,6,16,17,24,19)n=6 Participants0-
Week 13 (n=6,5,15,16,22,19)n=6 Participants0-
Week 26 (n=6,5,14,14,17,18)n=6 Participants0-
Week 39 (n=6,4,14,14,19,16)n=6 Participants0-
AAB-003 2 mg/kgDay 1 (n=6,6,16,17,24,19)n=16 Participants0-
Week 13 (n=6,5,15,16,22,19)n=16 Participants0-
Week 26 (n=6,5,14,14,17,18)n=16 Participants0-
Week 39 (n=6,4,14,14,19,16)n=16 Participants0-
AAB-003 4 mg/kgDay 1 (n=6,6,16,17,24,19)n=17 Participants0-
Week 13 (n=6,5,15,16,22,19)n=17 Participants0-
Week 26 (n=6,5,14,14,17,18)n=17 Participants0-
Week 39 (n=6,4,14,14,19,16)n=17 Participants0-
AAB-003 8 mg/kgDay 1 (n=6,6,16,17,24,19)n=24 Participants0-
Week 13 (n=6,5,15,16,22,19)n=24 Participants0-
Week 26 (n=6,5,14,14,17,18)n=24 Participants0-
Week 39 (n=6,4,14,14,19,16)n=24 Participants0-
PlaceboDay 1 (n=6,6,16,17,24,19)n=19 Participants0-
Week 13 (n=6,5,15,16,22,19)n=19 Participants0-
Week 26 (n=6,5,14,14,17,18)n=19 Participants0-
Week 39 (n=6,4,14,14,19,16)n=19 Participants0-

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 tableClinicalTrials.gov results section

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.