Clinical trial Phase 3 Interventional Ages 60 to 85

A Study of Remternetug (LY3372993) in Participants With Alzheimer's Disease (TRAILRUNNER-ALZ 1)

Run by Eli Lilly and Company · NCT05463731 · Data updated 2026-11-12

Completed. This study is not taking new participants. Data collection ended 2024-04-24.

The reason for this study is to collect safety and efficacy information regarding the study drug remternetug in participants with early symptomatic Alzheimer's disease (AD).

Quick facts

PhasePhase 3
Study typeInterventional
Ages60 Years to 85 Years
SexAll
Enrollment1667 (actual)
SponsorEli Lilly and Company
Industry-sponsored
Drugs / interventionsRemternetug (IV), Remternetug (SC), Placebo
Locations76 sites (Japan, United States)
Trial IDNCT05463731 on ClinicalTrials.gov

What this trial studies

TRAILRUNNER-ALZ 1 is a Phase 3, randomized, double-blind, placebo-controlled study to evaluate the safety and efficacy of remternetug in participants with early symptomatic AD. Initially, 600 participants will enroll in the double-blind treatment period. Participants in the double-blind treatment period will receive remternetug or placebo administered via subcutaneous injection or intravenous infusion. Following the 52-week main study period, participants will continue participation for up to an additional 76 weeks in an extension period. Participants who previously received remternetug will receive placebo and participants who previously received placebo will receive remternetug. Thus, all participants will receive remternetug if they complete the study. An additional 974 participants with early Alzheimer's disease will be enrolled to an addendum safety cohort. The participants will be administered open label remternetug via subcutaneous injection or intravenous infusion. Participants enrolled into the addendum safety cohort are not eligible for the extension period.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Gradual and progressive change in cognitive function ≥6 months prior to screening.
* A Mini-Mental (MMSE) score of 20 to 30 (inclusive) at screening.
* Has an amyloid PET scan result consistent with the eligibility criteria.
* Have a reliable study partner who will provide written informed consent to participate and is in frequent contact with the participant.
* Have adequate literacy, vision, and hearing for the neuropsychological testing in the opinion of the investigator at the time of screening.
* Are reliable and willing to make themselves available for the duration of the study and are willing to follow study procedures.
* Males and females will be eligible for this study.
* Women not of childbearing potential (WNOCBP) may participate in this trial.

Exclusion Criteria:

* Current serious or unstable illnesses that, in the investigator's opinion, could interfere with the analyses in this study; or has a life expectancy of \<24 months.
* History of cancer with high risk of recurrence and preventing completion of the trial.
* Participants with any current primary psychiatric diagnosis other than AD that in the investigator's opinion, is likely to confound interpretation of the drug effect, affect cognitive assessment, or affect the participant's ability to complete the study.
* History of clinically significant multiple or severe drug allergies.
* Have any clinically important abnormality at screening, as determined by investigator that could be detrimental to the participant, could compromise the study, or show evidence of other etiologies for dementia.
* Screening magnetic resonance imaging (MRI) which shows evidence of significant abnormality that would suggest another potential etiology for progressive dementia or a clinically significant finding that may impact the participant's ability to safely participate in the study.
* Have any contraindications for MRI or positron emission tomography (PET).
* Have had prior treatment with a passive anti-amyloid immunotherapy.
* Have received active immunization against Aβ in any other study.
* Have known allergies to remternetug related compounds, or any components of the formulation.

Where it's running

  • MD First Research - Chandler
    Chandler, Arizona, United States
  • Hope Clinical Research, Inc.
    Canoga Park, California, United States
  • North County Neurology Associates
    Carlsbad, California, United States
  • Wr- Pri, Llc
    Encino, California, United States
  • Neuro-Pain Medical Center
    Fresno, California, United States
  • Irvine Clinical Research
    Irvine, California, United States
Show 44 more locations
  • Kaizen Brain Center
    La Jolla, California, United States
  • Anderson Clinical Research
    Redlands, California, United States
  • Mountain Neurological Research Center
    Basalt, Colorado, United States
  • Alpine Clinical Research Center
    Boulder, Colorado, United States
  • Colorado Springs Neurological Associates
    Colorado Springs, Colorado, United States
  • Institute for Neurodegenerative Disorders
    New Haven, Connecticut, United States
  • Ki Health Partners, LLc, dba New England Institute for Clinical Research
    Stamford, Connecticut, United States
  • JEM Research Institute
    Atlantis, Florida, United States
  • VIN-Julie Schwartzbard
    Aventura, Florida, United States
  • Brain Matters Research
    Delray Beach, Florida, United States
  • Neuropsychiatric Research Center of Southwest Florida
    Fort Myers, Florida, United States
  • Finlay Medical Research
    Greenacres City, Florida, United States
  • Encore Research Group- Jacksonville Center for Clinical Research
    Jacksonville, Florida, United States
  • ClinCloud - Maitland
    Maitland, Florida, United States
  • K2 Medical Research
    Maitland, Florida, United States
  • ClinCloud - Viera
    Melbourne, Florida, United States
  • Merritt Island Medical Research, LLC
    Merritt Island, Florida, United States
  • VIN-Andrew Lerman
    Miami, Florida, United States
  • Optimus U Corporation
    Miami, Florida, United States
  • Suncoast Clinical Research, Inc.
    New Port Richey, Florida, United States
  • Renstar Medical Research
    Ocala, Florida, United States
  • Charter Research - Winter Park
    Orlando, Florida, United States
  • Emerald Coast Neurology - Airport Boulevard
    Pensacola, Florida, United States
  • Progressive Medical Research
    Port Orange, Florida, United States
  • Alzheimer's Research and Treatment Center
    Stuart, Florida, United States
  • Brain Matters Research
    Stuart, Florida, United States
  • Tallahassee Neurological Clinic
    Tallahassee, Florida, United States
  • Charter Research - Lady Lake
    The Villages, Florida, United States
  • Alzheimer's Research and Treatment Center
    Wellington, Florida, United States
  • Palm Beach Neurology
    West Palm Beach, Florida, United States
  • Conquest Research
    Winter Park, Florida, United States
  • Columbus Memory Center, PC
    Columbus, Georgia, United States
  • iResearch Atlanta
    Decatur, Georgia, United States
  • Great Lakes Clinical Trials - Andersonville
    Chicago, Illinois, United States
  • AMITA Health - Alexian Brothers Neurosciences Institute Clinical Research
    Elk Grove Village, Illinois, United States
  • Covenant Medical Center
    Waterloo, Iowa, United States
  • Cotton O'Neil Clinical Research Center - Central Office
    Topeka, Kansas, United States
  • Care Access - Lake Charles
    Lake Charles, Louisiana, United States
  • MedVadis Research Corporation
    Waltham, Massachusetts, United States
  • Adams Clinical
    Watertown, Massachusetts, United States
  • Citizens Memorial Hospital District
    Bolivar, Missouri, United States
  • Clinical Research Professionals
    Chesterfield, Missouri, United States
  • Las Vegas Medical Research
    Las Vegas, Nevada, United States
  • The Cognitive and Research Center of New Jersey
    Springfield, New Jersey, United States

+26 more sites. See ClinicalTrials.gov for the full list.

Study contacts

  • Principal investigator: 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

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How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.