Clinical trial Recruiting at 10 sites Phase 1 Interventional Ages 40 to 80

ALN-5288 injected into the spinal fluid for Alzheimer's disease

Official title: A Phase 1, Randomized, Placebo-controlled Study With a Double Blind Period With Open-label Extension Period to Evaluate the Safety, Tolerability, Pharmacokinetics and Pharmacodynamics of Intrathecally Administered ALN-5288 in Adult Patients With Alzheimer's Disease

Run by Alnylam Pharmaceuticals · NCT07214727 · Data updated 2026-11-12

This will test whether giving ALN-5288 into the spinal fluid is safe and how the medicine moves through and affects the body in people with mild cognitive impairment or dementia from Alzheimer's disease.

More Alzheimer's Disease trials

Quick facts

PhasePhase 1
Study typeInterventional
Ages40 Years to 80 Years
SexAll
Enrollment50 (estimated)
SponsorAlnylam Pharmaceuticals
Industry-sponsored
Locations13 sites (Montreal and 12 other locations)
StatusRecruiting
StartedOctober 15, 2025
Main results expectedMarch 6, 2030
Study endsMarch 6, 2030
Registry record updatedOctober 8, 2026
Trial IDNCT07214727 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are people with a clinical diagnosis of Alzheimer's disease (MCI or dementia due to AD) confirmed by CSF biomarkers or positive amyloid PET within seven years who can undergo intrathecal dosing and attend visits at the listed Canadian sites.

Probably not a fit

Patients with non‑AD dementia, significant liver or kidney dysfunction, uncontrolled blood pressure, active hepatitis or HIV infection, or clinically significant ECG abnormalities are unlikely to qualify or benefit from this early safety-focused trial.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This is a Phase 1 interventional study that delivers ALN-5288 into the cerebrospinal fluid (intrathecal) and compares it with placebo to characterize safety and tolerability. The trial will measure pharmacokinetic and pharmacodynamic effects in blood and CSF after dosing. Eligible participants must have AD confirmed by CSF biomarkers or a positive amyloid PET within seven years and have mild cognitive impairment or dementia due to AD. Study visits are conducted at clinical sites in Montreal, Ottawa, and Toronto.

Why it matters

Potential benefit: If safe and biologically active, ALN-5288 could offer a new way to target disease processes in the brain and potentially lead to future treatments for Alzheimer's disease.

How similar studies have gone: Intrathecal delivery of genetic or antisense therapies has shown success in other neurological diseases, but using this approach for Alzheimer's is relatively novel and clinical benefit in AD remains unproven.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Is able and willing to meet all study requirements in the opinion of the Investigator
* Has a diagnosis of Alzheimer's disease (AD) based on clinical findings supported by cerebrospinal fluid (CSF) biomarkers or positive positron emission tomography (PET) amyloid imaging within 7 years prior to screening
* Has mild cognitive impairment (MCI) or dementia due to AD

Exclusion Criteria:

* Has non-AD dementia
* Has alanine aminotransferase (ALT) or aspartate aminotransferase (AST) \>2× upper limit of normal (ULN)
* Has total bilirubin \>1.5×ULN
* Has known human immunodeficiency virus infection
* Has history of hepatitis C virus or current hepatitis B virus infection
* Has systolic blood pressure \>160 mmHg and/or a diastolic blood pressure \>100 mmHg after 10 minutes of rest at screening
* Has an estimated glomerular filtration (eGFR) of \<45 mL/min/1.73 m\^2 at screening
* Has clinically significant ECG abnormalities at screening
* Has uncontrolled psychiatric disease, including patients deemed by the Investigator to be at significant risk of suicide, major depressive episode, psychosis, confusional state, or violent behavior
* Has history of bleeding diathesis or coagulopathy due to chronic conditions
* Has a medical history of brain or spinal disease that would interfere with the IT injection and LP procedures
* Has history of uncontrolled seizures within the last 6 months prior to Screening

Where it's running

  • Clinical Trial Site
    Montreal, Canada
    Recruiting
  • Clinical Trial Site
    Ottawa, Canada
    Recruiting
  • Clinical Trial Site
    Toronto, Canada
    Recruiting
  • Clinical Trial Site
    's-Hertogenbosch, Netherlands
    Recruiting
  • Clinical Trial Site
    Amsterdam, Netherlands
    Recruiting
  • Clinical Trial Site
    Madrid, Spain
    Recruiting
Show 7 more locations
  • Clinical Trial Site
    Glasgow, United Kingdom
    Recruiting
  • Clinical Trial Site
    London, United Kingdom
    Recruiting
  • Clinical Trial Site
    Sheffield, United Kingdom
    Recruiting
  • Clinical Trial Site
    Southampton, United Kingdom
    Recruiting
  • Clinical Trial Site
    Toronto, Canada
    Not yet recruiting
  • Clinical Trial Site
    Barcelona, Spain
    Not yet recruiting
  • Clinical Trial Site
    Sant Cugat del Vallès, Spain
    Not yet recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

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.