COVID-19 is an emerging, rapidly evolving situation.
Get the latest public health information from CDC:

Get the latest research information from NIH: Menu

First in Human Study for Safety and Tolerability of AL003.

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. Read our disclaimer for details. Identifier: NCT03822208
Recruitment Status : Recruiting
First Posted : January 30, 2019
Last Update Posted : April 19, 2019
Information provided by (Responsible Party):
Alector Inc.

Brief Summary:
This is a multi-center, randomized, double-blind, placebo-controlled, dose escalation first in human (FIH) study in healthy adults and in patients with mild to moderate Alzheimer's disease. The study is designed to systematically assess the safety (including immunogenicity) and tolerability, pharmacokinetics (PK) and pharmacodynamics (PD) of AL003.

Condition or disease Intervention/treatment Phase
Healthy Alzheimer Disease Biological: AL003 Other: Saline Solution Phase 1

Detailed Description:

The study will be conducted in 2 phases:

In the single ascending dose (SAD) phase, up to approximately 42 healthy adult participants will be sequentially enrolled into up to approximately 7 cohorts. In the multiple-dose (MD) phase, approximately 12 patients with mild to moderate Alzheimer's disease will be enrolled in one cohort.

Layout table for study information
Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 54 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Triple (Participant, Care Provider, Investigator)
Primary Purpose: Treatment
Official Title: A Phase I Study Evaluating the Safety, Tolerability, Pharmacokinetics, Pharmacodynamics, and Immunogenicity of Single and Multiple Doses of AL003 in Healthy Participants and in Participants With Mild to Moderate Alzheimer's Disease.
Actual Study Start Date : March 29, 2019
Estimated Primary Completion Date : April 2020
Estimated Study Completion Date : July 2020

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
Active Comparator: AL003 by intravenous (IV) infusion
single-doses of AL003 in dose-escalating cohorts
Biological: AL003
Single-doses of AL003 in up to 7 dose-escalating cohorts

Placebo Comparator: Placebo by intravenous (IV) infusion
Saline solution will be administered as a single infusion for each cohort for placebo subjects
Other: Saline Solution
Saline Solution will be administered as a single infusion for each cohort in a ration of 6 active and 2 placebo subjects for healthy adults and 10 active and 2 placebo for patients

Primary Outcome Measures :
  1. Evaluation of safety and tolerability of AL003 measured by number of subjects with adverse events and dose limiting adverse events (DLAE) [ Time Frame: 134 days ]
    Incidence of adverse events during the treatment and follow up periods through out the study.

Secondary Outcome Measures :
  1. Pharmacokinetics (PK) of AL003 [ Time Frame: 85 days ]
    Serum and CSF concentration of AL003 at specific time points

  2. Maximum concentration (Cmax) for AL003 [ Time Frame: 85 days ]
    Evaluate Cmax for serum and CSF concentration of AL003 at specified time points

  3. Area under the curve concentration (AUC) for AL003 [ Time Frame: 85 days ]
    Evaluate AUC for serum and CSF concentration of AL003 at specified time points

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

Layout table for eligibility information
Ages Eligible for Study:   18 Years to 85 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  1. Total body weight between 50 and 120 kg, inclusive
  2. Clinical laboratory evaluations (including chemistry panel fasted [at least 8 hours], complete blood count (CBC), and urine analysis) within the reference range for the test laboratory, unless deemed not clinically significant by the Investigator. A count of the segmented neutrophils and bands should be performed when results from the white blood cells (WBCs) are not within the reference range.
  3. Negative test for selected drugs of abuse at screening (dose not include alcohol) and at admission (does include alcohol breath test). A positive result may be verified by re-testing (up to one false positive result permitted) and may be followed up at the discretion of the Investigator.
  4. Females must be non-pregnant and non-lactating, and either surgically sterile, using double barrier method or abstinence.
  5. In good health, determined by no clinically significant findings from medical history, physical examination, 12-lead electrocardiogram (ECG), laboratory tests, and vital signs.

For MD cohort

  1. Ages 50-85 years, inclusive.
  2. The participant should be capable of completing assessments either alone or with the help of the study partner (where appropriate), per local guidelines.
  3. Availability of a person ("study partner") 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, which require partner input for scale completion, and signs the necessary consent form, per local guidelines.
  4. Clinical diagnosis of probable Alzheimer's disease dementia based on National Institute on Aging Alzheimer's Association criteria.

Exclusion Criteria:

  1. Pregnant or lactating, or intending to become pregnant within 16 weeks after last dose of study drug.
  2. Participation in a clinical trial within 30 days before randomization; use of any experimental oral therapy within 30 days or 5 half-lives prior to Day 1, whichever is greater; or use of any biologic therapy within 12 weeks or 5 half-lives prior to Day 1, whichever is greater. Participants who have received an experimental therapy that has no half-life, like a vaccine, should have completed that therapy at least 12 weeks prior to Day 1. Participants who have received an experimental vaccine against a central nervous system (CNS) target, such as beta-amyloid or tau, are not eligible for this study.
  3. Any non-experimental vaccine within 2 weeks of randomization, until 2 weeks after the last dose. It is advised that prospective participants receive their annual influenza vaccine as early as possible in advance of the flu season, and then wait 2 weeks prior to randomization. It is permitted to receive the annual influenza vaccine during the screening period.
  4. Surgery or hospitalization during the 4 weeks prior to screening.
  5. Planned procedure or surgery during the study.
  6. Systemically, clinically significantly immunocompromised patients, owing to continuing effects of immune suppressing medication.
  7. Known history of severe allergic, anaphylactic, or other hypersensitivity reactions to chimeric, human, or humanized antibodies or fusion proteins.
  8. Past history of seizures, with the exception of childhood febrile seizures.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT03822208

Layout table for location contacts
Contact: Study Lead 415-231-5660 ext 329

Layout table for location information
Nucleus Network Recruiting
Melbourne, Australia
Contact: Study Coordinator         
Principal Investigator: Ben Snyder         
Sponsors and Collaborators
Alector Inc.
Layout table for investigator information
Principal Investigator: Ben Snyder, MD Nucleus Network

Layout table for additonal information
Responsible Party: Alector Inc. Identifier: NCT03822208    
Other Study ID Numbers: AL003-1
First Posted: January 30, 2019    Key Record Dates
Last Update Posted: April 19, 2019
Last Verified: January 2019
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: Undecided

Layout table for additional information
Studies a U.S. FDA-regulated Drug Product: Yes
Studies a U.S. FDA-regulated Device Product: No
Additional relevant MeSH terms:
Layout table for MeSH terms
Alzheimer Disease
Brain Diseases
Central Nervous System Diseases
Nervous System Diseases
Neurodegenerative Diseases
Neurocognitive Disorders
Mental Disorders