Mivelsiran for Alzheimer's Disease
What You Need to Know Before You Apply
What is the purpose of this trial?
This trial examines the effectiveness of a new treatment, mivelsiran, for individuals with early-stage Alzheimer's linked to Down syndrome. Researchers aim to determine the safety of mivelsiran and its effects on the body. Participants will receive either low or high doses of mivelsiran or a placebo (a substance with no active drug) for comparison. Individuals with Down syndrome, well-controlled seizures, and a positive amyloid PET scan (indicating certain protein build-ups in the brain) might be suitable candidates. The study spans up to 39 months, including screening and follow-up. As a Phase 2 trial, this research focuses on assessing the treatment's effectiveness in an initial, smaller group of participants.
Will I have to stop taking my current medications?
The trial information does not specify if you need to stop taking your current medications. It's best to discuss this with the trial team or your doctor.
Is there any evidence suggesting that mivelsiran is likely to be safe for humans?
Previous studies have shown that mivelsiran is generally well tolerated. Research involving both single and multiple doses found no major safety issues among participants. For instance, important health markers, such as protein levels or white cell counts in the fluid around the brain and spine, remained stable. Additionally, no new safety concerns emerged, and brain scans did not reveal any increased risk of problems. These findings suggest that mivelsiran is safe for humans, but ongoing studies will continue to monitor its effects.12345
Why do researchers think this study treatment might be promising for Alzheimer's?
Most treatments for Alzheimer's disease focus on managing symptoms with medications like cholinesterase inhibitors and memantine. However, Mivelsiran is different because it targets the underlying disease process. Mivelsiran works by interfering with the production of a specific protein that contributes to the progression of Alzheimer's, which could potentially slow or even halt the disease. Researchers are excited about Mivelsiran because it offers a new approach by directly targeting the biological mechanisms behind Alzheimer's rather than just alleviating symptoms. This could mean a significant advancement in how we treat this challenging condition.
What evidence suggests that mivelsiran might be an effective treatment for Alzheimer's?
Research has shown that mivelsiran holds promise for treating Alzheimer's disease. In this trial, participants will receive either multiple low doses, multiple high doses of mivelsiran, or a placebo. Studies have found that mivelsiran, whether in single or multiple doses, significantly reduces certain brain proteins linked to Alzheimer's. These reductions depend on the dose, with higher doses having a stronger effect. Importantly, these effects last for several months. Early results also suggest that the treatment is generally well tolerated, with most participants not experiencing serious side effects. These findings offer hope that mivelsiran could help manage Alzheimer's disease symptoms.13678
Who Is on the Research Team?
Medical Director
Principal Investigator
Alnylam Pharmaceuticals
Are You a Good Fit for This Trial?
This trial is for adults with Down syndrome (trisomy 21) who have early-stage Alzheimer's disease. Participants must show amyloid buildup on a brain scan, be cognitively stable, and have had no seizures in the past 6 months.Inclusion Criteria
Exclusion Criteria
Timeline for a Trial Participant
Screening
Participants are screened for eligibility to participate in the trial
Double-blind Treatment
Participants receive either mivelsiran or placebo for 24 months to evaluate efficacy, safety, tolerability, and pharmacodynamics
Follow-up
Participants are monitored for safety and effectiveness after treatment
Open-label Extension (optional)
Participants may opt into continuation of mivelsiran treatment for an additional 12 months
What Are the Treatments Tested in This Trial?
Interventions
- Mivelsiran
Trial Overview
The study compares mivelsiran, an investigational drug, to a placebo in people with early-stage Down syndrome-associated Alzheimer's. Treatment lasts up to 24 months, with an optional extra year where all can receive mivelsiran.
How Is the Trial Designed?
3
Treatment groups
Experimental Treatment
Placebo Group
Participants will be administered multiple high doses of mivelsiran.
Participants will be administered multiple low doses of mivelsiran.
Participants will be administered multiple doses of placebo.
Find a Clinic Near You
Who Is Running the Clinical Trial?
Alnylam Pharmaceuticals
Lead Sponsor
Dr. Yvonne Greenstreet
Alnylam Pharmaceuticals
Chief Executive Officer since 2021
MD from the University of Leeds, MBA from INSEAD
Dr. Pushkal Garg
Alnylam Pharmaceuticals
Chief Medical Officer since 2016
MD from Columbia University
Citations
Multiple‐Dose Results from an Ongoing Phase 1 Study of ...
single and multiple doses of mivelsiran were generally well tolerated and continued to demonstrate robust, durable, dose‐dependent CSF sAPPβ reductions.
2.
capella.alnylam.com
capella.alnylam.com/wp-content/uploads/2025/07/AAIC-Phase-1_OP_SUBMITTED28Jul.pdfMultiple-Dose Results from an Ongoing Phase 1 ... - Capella
Alzheimers Dement 2011;7:367–85. Here, we present original multiple-dose data on mivelsiran from an ongoing Phase 1 study in early-onset AD.
Mivelsiran
The reductions persisted for two to three months, and gradually recovered to normal after about nine months. Patients who received 50 mg six ...
A Study to Evaluate Mivelsiran in Adult Participants With ...
The purpose of the study is to evaluate the effect of mivelsiran in adult participants with early-stage DS-AD and to characterize the safety, tolerability, and ...
5.
neurologylive.com
neurologylive.com/view/overviewing-encouraging-early-stage-data-mivelsiran-rna-therapeutic-alzheimers-sharon-cohenOverviewing Encouraging Early-Stage Data on Mivelsiran, ...
An in-depth overview of results from an ongoing phase 1 study assessing mivelsiran as a treatment for patients with early-stage Alzheimer disease.
6.
capella.alnylam.com
capella.alnylam.com/wp-content/uploads/2024/07/AAIC-2024_Mivelsiran-Phase-1-Part-A-Poster_FINAL.pdfSingle Ascending Dose Results From an Ongoing Phase 1 ...
Baseline characteristics and safety data are reported in pooled cohorts of mivelsiran and placebo, to preserve blinding in this ongoing ...
7.
alz-journals.onlinelibrary.wiley.com
alz-journals.onlinelibrary.wiley.com/doi/abs/10.1002/alz.084521Single ascending dose results from an ongoing Phase 1 study ...
mivelsiran 50mg and 75mg were well tolerated and produced robust, durable reductions in CSF levels of soluble APP and downstream Aβ42 and Aβ40, ...
A Study to Evaluate the Safety and Tolerability of ALN-APP ...
The purpose of this study is to evaluate the safety, tolerability, pharmacodynamics (PD) and pharmacokinetics (PK) Alzheimer's Disease (EOAD).
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