Clinical Trial of Solanezumab for Older Individuals Who May be at Risk for Memory Loss
A4
Anti-Amyloid Treatment in Asymptomatic Alzheimer's Disease (A4 Study)
2 other identifiers
interventional
1,169
4 countries
68
Brief Summary
The purpose of this study is to test whether an investigational drug called solanezumab can slow the progression of memory problems associated with brain amyloid (protein that forms plaques in the brains of people with Alzheimer Disease \[AD\]).
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at P75+ for phase_3
Started Feb 2014
Longer than P75 for phase_3
68 active sites
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
Click on a node to explore related trials.
Study Timeline
Key milestones and dates
First Submitted
Initial submission to the registry
December 6, 2013
CompletedFirst Posted
Study publicly available on registry
December 11, 2013
CompletedStudy Start
First participant enrolled
February 28, 2014
CompletedPrimary Completion
Last participant's last visit for primary outcome
December 27, 2022
CompletedStudy Completion
Last participant's last visit for all outcomes
June 8, 2023
CompletedResults Posted
Study results publicly available
December 28, 2023
CompletedDecember 28, 2023
December 1, 2023
8.8 years
December 6, 2013
December 14, 2023
December 14, 2023
Conditions
Keywords
Outcome Measures
Primary Outcomes (2)
Change From Baseline of the Preclinical Alzheimer Cognitive Composite (PACC) Score
PACC has 4 components: Free and Cued Selective Reminding Test (0 (worst)-96 (best recall); Delayed Paragraph Recall test (Range 0 (worst)-25 (best recall); Wechsler Adult Intelligence scale: Digit Symbol Substitution Test (DSST): (ranges 0 \[none\]-91 \[best performance\]) and Mini Mental State Examination (Range 0 \[worst\] - 30 \[best performance\]). Component scores are transformed using an established normalization method into z-scores. Each of 4 component change scores is divided by baseline sample standard deviation (SD) of that component. These z scores are summed to form the composite score. Thus, a change of 1 baseline standard deviation on each component would correspond to a 4-point change on the composite. A z-score of 0 is equal to the mean and implies how many SD higher or lower score as compared with baseline score, with increase signifying improvement.
Baseline, Week approximately 240
Change From Baseline of the Preclinical Alzheimer Cognitive Composite (PACC) Score
PACC has 4 components: Free and Cued Selective Reminding Test (0 (worst)-96 (best recall); Delayed Paragraph Recall test (Range 0 (worst)-25 (best recall); Wechsler Adult Intelligence scale: Digit Symbol Substitution Test (DSST): (ranges 0 \[none\]-91 \[best performance\]) and Mini Mental State Examination (Range 0 \[worst\] - 30 \[best performance\]). Component scores are transformed using an established normalization method into z-scores. Each of 4 component change scores is divided by baseline sample standard deviation (SD) of that component. These z scores are summed to form the composite score. Thus, a change of 1 baseline standard deviation on each component would correspond to a 4-point change on the composite. A z-score of 0 is equal to the mean and implies how many SD higher or lower score as compared with baseline score, with increase signifying improvement.
Baseline, Week 336
Secondary Outcomes (10)
Change From Baseline in Cognitive Function Index (CFI)
Baseline, Week approximately 240
Change From Baseline in Cognitive Function Index (CFI)
Baseline, Week 336
Change From Baseline in Alzheimer's Disease Cooperative Study-Activities Daily Living-Prevention Questionnaire (ADCS-ADL-Prevention Questionnaire) Score
Baseline, Week approximately 240
Change From Baseline in Alzheimer's Disease Cooperative Study-Activities Daily Living-Prevention Questionnaire (ADCS-ADL-Prevention Questionnaire) Score
Baseline, Week 336
Change From Baseline in Mean Composite Standardized Uptake Value Ratio (SUVr)
Baseline, Week approximately 240
- +5 more secondary outcomes
Study Arms (2)
Solanezumab/Solanezumab
EXPERIMENTALParticipants received 400 milligram (mg) solanezumab followed by 800 mg solanezumab and then 1600 milligram solanezumab administered intravenously (IV) every 4 weeks (Q4W) for approximately 240 weeks in double-blind placebo-controlled period. Participants begin open label extension and received 1600 mg solanezumab Q4W for 204 weeks (from week 240 to week 444).
Placebo/Solanezumab
PLACEBO COMPARATORParticipants received placebo administered IV Q4W for approximately 240 weeks in double-blind period. Participants begin open label extension period and received 1600 mg solanezumab Q4W for 204 weeks (from week 240 to week 444).
Interventions
Eligibility Criteria
You may qualify if:
- Has a Mini-Mental State Examination (MMSE) score at screening of 25 to 30
- Has a global Clinical Dementia Rating (CDR) scale score at screening of 0
- Has a Logical Memory II score at screening of 6 to 18
- Has a florbetapir positron emission tomography (PET) scan that shows evidence of brain amyloid pathology at screening
- Has a study partner that is willing to participate as a source of information and has at least weekly contact with the participant (contact can be in-person, via telephone or electronic communication)
You may not qualify if:
- Is receiving a prescription acetylcholinesterase inhibitor (AChEI) and/or memantine at screening or baseline
- Lacks good venous access, such that intravenous drug delivery or multiple blood draws would be precluded
- Has current serious or unstable illness including cardiovascular, hepatic, renal, gastroenterologic, respiratory, endocrinologic, neurologic, psychiatric, immunologic, or hematologic disease or other conditions that, in the investigator's opinion, could interfere with the analyses of safety and efficacy in this study
- Has had a history within the last 5 years of a serious infectious disease affecting the brain (including neurosyphilis, meningitis, or encephalitis) or head trauma resulting in protracted loss of consciousness
- Has had a history within the last 5 years of a primary or recurrent malignant disease with the exception of any in situ cancer that was appropriately treated and is being appropriately monitored, such as resected cutaneous squamous cell carcinoma in situ or in situ prostate cancer with normal prostate-specific antigen post-treatment
- Has a known history of human immunodeficiency virus (HIV), clinically significant multiple or severe drug allergies, or severe post-treatment hypersensitivity reactions (including, but not limited to, erythema multiforme major, linear immunoglobulin A dermatosis, toxic epidermal necrolysis, or exfoliative dermatitis)
- Is clinically judged by the investigator to be at serious risk for suicide
- Has a history within the past 2 years of major depression or bipolar disorder as defined by the most current version of the Diagnostic and Statistical Manual of Mental Disorders (DSM)
- Has a history within the past 5 years of chronic alcohol or drug abuse/dependence as defined by the most current version of the DSM
- All participants who complete the placebo-controlled period will be allowed to continue into the open-label period
Contact the study team to confirm eligibility.
Sponsors & Collaborators
- Eli Lilly and Companylead
- Alzheimer's Therapeutic Research Institutecollaborator
Study Sites (68)
University of Alabama at Birmingham
Birmingham, Alabama, 35294, United States
Banner Health Research Institute
Phoenix, Arizona, 85006, United States
Barrow Neurological Institute
Phoenix, Arizona, 85013, United States
Banner Sun Health Research Institute
Sun City, Arizona, 85351, United States
Institute for Memory Impairment & Neurological Disorders
Irvine, California, 92697, United States
University of California - San Diego
La Jolla, California, 92037, United States
University of Southern California School of Medicine
Los Angeles, California, 90033, United States
University of California - Los Angeles
Los Angeles, California, 90095, United States
Univ of California Irvine College of Medicine
Orange, California, 92868, United States
Veterans Affairs Medical Center Palo Alto
Palo Alto, California, 94304, United States
Sutter Medical Group
Sacramento, California, 95816, United States
Univ of California San Francisco
San Francisco, California, 94158, United States
Syrentis Clinical Research
Santa Ana, California, 92705, United States
University of California, Davis - Health Systems
Walnut Creek, California, 94598, United States
Yale University School of Medicine
New Haven, Connecticut, 06510, United States
Georgetown University Hospital
Washington D.C., District of Columbia, 20057, United States
Howard University Hospital
Washington D.C., District of Columbia, 20060, United States
Brain Matters Research
Delray Beach, Florida, 33445, United States
Mayo Clinic-Jacksonville
Jacksonville, Florida, 32224, United States
Wien Center for Clinical Research
Miami Beach, Florida, 33140, United States
Compass Research - Orlando
Orlando, Florida, 32806, United States
University of South Florida
Tampa, Florida, 33613, United States
Compass Research -The Villages
The Villages, Florida, 32162, United States
Premiere Research Institute at Palm Beach Neurology
West Palm Beach, Florida, 33407, United States
Emory University
Atlanta, Georgia, 30322, United States
Northwestern University
Chicago, Illinois, 60611, United States
Rush Alzheimer's Disease Center
Chicago, Illinois, 60612, United States
Great Lakes Clinical Trials
Chicago, Illinois, 60640, United States
Indiana University School of Medicine
Indianapolis, Indiana, 46202, United States
University of Iowa
Iowa City, Iowa, 52242, United States
University of Kansas Hospital
Fairway, Kansas, 66205, United States
University of Kentucky
Lexington, Kentucky, 40504, United States
Pennington Biomedical Research Center
Baton Rouge, Louisiana, 70808-4124, United States
Johns Hopkins University School of Medicine
Baltimore, Maryland, 21093, United States
Brigham and Womens Hospital
Boston, Massachusetts, 02115, United States
Boston University Medical Center
Boston, Massachusetts, 02118, United States
University of Michigan
Ann Arbor, Michigan, 48105, United States
Mayo Clinic
Rochester, Minnesota, 55905, United States
Washington University School of Medicine
St Louis, Missouri, 63110, United States
Univ of Nebraska Med Center
Omaha, Nebraska, 68198, United States
Cleveland Clinic of Las Vegas
Las Vegas, Nevada, 89106, United States
Dent Neurological Institute
Amherst, New York, 14226, United States
New York University Medical Center
New York, New York, 10016, United States
Weill Cornell Medical College
New York, New York, 10021, United States
Mount Sinai School of Medicine
New York, New York, 10029, United States
Columbia University Medical Center
New York, New York, 10032, United States
University of Rochester
Rochester, New York, 14620, United States
Wake Forest University School of Medicine
Winston-Salem, North Carolina, 27157, United States
Case Western Reserve University
Beachwood, Ohio, 44122, United States
Tulsa Clinical Research LLC
Tulsa, Oklahoma, 74104, United States
Oregon Health and Science University
Portland, Oregon, 97239, United States
Drexel University College of Medicine at EPPI
Philadelphia, Pennsylvania, 19102, United States
University of Pennsylvania Hospital
Philadelphia, Pennsylvania, 19104, United States
University of Pittsburgh Medical Center
Pittsburgh, Pennsylvania, 15213, United States
Butler Hospital
Providence, Rhode Island, 02906, United States
Rhode Island Hospital
Providence, Rhode Island, 02906, United States
Roper Hospital
Charleston, South Carolina, 29401, United States
University of Texas Southwestern Medical Center at Dallas
Dallas, Texas, 75235, United States
Baylor College of Medicine
Houston, Texas, 77030, United States
Houston Methodist
Houston, Texas, 77030, United States
University of Washington School of Medicine
Seattle, Washington, 98108, United States
University of Wisconsin-Madison Hospital and Health Clinic
Madison, Wisconsin, 53705, United States
For additional information regarding investigative sites for this trial, contact 1-877-CTLILLY (1-877-285-4559, 1-317-615-4559) Mon - Fri from 9 AM to 5 PM Eastern Time (UTC/GMT - 5 hours, EST), or speak with your personal physician.
Parkville, Victoria, 3010, Australia
For additional information regarding investigative sites for this trial, contact 1-888-545-5972 Mon - Fri, 9 AM to 4 PM or 1-877-CTLILLY (1-877-285-4559, 1-317-615-4559) Mon - Fri, 9 AM to 5 PM Eastern Time or speak with your personal physician.
London, N6C 0A7, Canada
For additional information regarding investigative sites for this trial, contact 1-888-545-5972 Mon - Fri, 9 AM to 4 PM or 1-877-CTLILLY (1-877-285-4559, 1-317-615-4559) Mon - Fri, 9 AM to 5 PM Eastern Time or speak with your personal physician.
Toronto, M3B2S7, Canada
Sunnybrook Health Sciences Centre
Toronto, M4N 3M5, Canada
For additional information regarding investigative sites for this trial, contact 1-888-545-5972 Mon - Fri, 9 AM to 4 PM or 1-877-CTLILLY (1-877-285-4559, 1-317-615-4559) Mon - Fri, 9 AM to 5 PM Eastern Time or speak with your personal physician.
Vancouver, V6T 2B5, Canada
For additional information regarding investigative sites for this trial, contact 1-877-CTLILLY (1-877-285-4559, 1-317-615-4559) Mon - Fri from 9 AM to 5 PM Eastern Time (UTC/GMT - 5 hours, EST), or speak with your personal physician.
Bunkyō City, 113-8655, Japan
Related Publications (8)
Hibar DP, Bauer A, Rabe C, Borlinghaus N, Jethwa A, Kollmorgen G, Di Domenico A, Zetterberg H, Blennow K, Masters CL, Sperling RA, Bittner T. Elecsys pTau217 plasma immunoassay detection of amyloid pathology in clinical cohorts. Alzheimers Dement. 2026 Jan;22(1):e71009. doi: 10.1002/alz.71009.
PMID: 41537338DERIVEDShirzadi Z, Schultz AP, Loghmani N, Yang HS, Ford J, Yaari R, Properzi M, Yau WW, Liu L, Rafii MS, Donohue MC, Brickman AM, Jack CR Jr, Greenberg SM, Aisen P, Sperling RA, Chhatwal JP; A4 Study Team. Independent effects of white matter lesion volume and APOE varepsilon4 on ARIA-H in A4 Study. Alzheimers Dement. 2025 Oct;21(10):e70751. doi: 10.1002/alz.70751.
PMID: 41085172DERIVEDDigma LA, Young CB, Winer JR, Cody KA, Younes K, Sheng J, Insel PS, Rissman RA, Sperling R, Mormino EC. Continuum of Core 1 Biomarkers in Preclinical Alzheimer's Disease. medRxiv [Preprint]. 2025 Sep 19:2025.09.17.25336007. doi: 10.1101/2025.09.17.25336007.
PMID: 41001450DERIVEDFarina FR, Bennett M, Grill JD, Sperling R, Lawlor B, Griffith JW. Association of Alzheimer's disease concerns with amyloid burden and lifestyle behaviors in cognitively unimpaired older adults. Alzheimers Dement. 2025 Jun;21(6):e70225. doi: 10.1002/alz.70225.
PMID: 40476544DERIVEDDubbelman MA, Liu A, Donohue MC, Langford O, Raman R, Rentz DM, Amariglio R, Sperling RA, Aisen PS, Marshall GA; as the A4 Study team. Changes in Daily Functioning in Association With Tau and Amyloid Among Unimpaired Older Adults With and Without Elevated Amyloid. Neurology. 2025 Jun 24;104(12):e213775. doi: 10.1212/WNL.0000000000213775. Epub 2025 May 29.
PMID: 40440591DERIVEDSperling RA, Donohue MC, Raman R, Rafii MS, Johnson K, Masters CL, van Dyck CH, Iwatsubo T, Marshall GA, Yaari R, Mancini M, Holdridge KC, Case M, Sims JR, Aisen PS; A4 Study Team. Trial of Solanezumab in Preclinical Alzheimer's Disease. N Engl J Med. 2023 Sep 21;389(12):1096-1107. doi: 10.1056/NEJMoa2305032. Epub 2023 Jul 17.
PMID: 37458272DERIVEDLewis CK, Bernstein OM, Grill JD, Gillen DL, Sultzer DL. Anxiety and Depressive Symptoms and Cortical Amyloid-beta Burden in Cognitively Unimpaired Older Adults. J Prev Alzheimers Dis. 2022;9(2):286-296. doi: 10.14283/jpad.2022.13.
PMID: 35543002DERIVEDGrober E, Lipton RB, Sperling RA, Papp KV, Johnson KA, Rentz DM, Veroff AE, Aisen PS, Ezzati A. Associations of Stages of Objective Memory Impairment With Amyloid PET and Structural MRI: The A4 Study. Neurology. 2022 Mar 29;98(13):e1327-e1336. doi: 10.1212/WNL.0000000000200046. Epub 2022 Feb 23.
PMID: 35197359DERIVED
Related Links
MeSH Terms
Conditions
Interventions
Condition Hierarchy (Ancestors)
Limitations and Caveats
Per protocol and SAP, delayed-start analyses were not conducted because no treatment difference was observed at the end of the double-blind (placebo-controlled) period. Hence, data were not evaluated for outcome measure analyses (week 336), but safety data were analyzed for open-label extension period.
Results Point of Contact
- Title
- Chief Medical Officer
- Organization
- Eli Lilly and Company
Study Officials
- STUDY DIRECTOR
Call 1-877-CTLILLY (1-877-285-4559) or 1-317-615-4559 Mon - Fri 9 AM - 5 PM Eastern time (UTC/GMT - 5 hours, EST)
Eli Lilly and Company
Publication Agreements
- PI is Sponsor Employee
- No
- Restriction Type
- GT60
- Restrictive Agreement
- Yes
Study Design
- Study Type
- interventional
- Phase
- phase 3
- Allocation
- RANDOMIZED
- Masking
- QUADRUPLE
- Who Masked
- PARTICIPANT, CARE PROVIDER, INVESTIGATOR, OUTCOMES ASSESSOR
- Purpose
- TREATMENT
- Intervention Model
- PARALLEL
- Sponsor Type
- INDUSTRY
- Responsible Party
- SPONSOR
Study Record Dates
First Submitted
December 6, 2013
First Posted
December 11, 2013
Study Start
February 28, 2014
Primary Completion
December 27, 2022
Study Completion
June 8, 2023
Last Updated
December 28, 2023
Results First Posted
December 28, 2023
Record last verified: 2023-12