Clinical trial Recruiting at 1 site Phase 1 Interventional Ages 18 to 65

ALN-4285 single ascending doses in healthy adults

Official title: A Phase 1, Randomized, Double-blind, Placebo-controlled, Single Ascending Dose Study to Evaluate the Safety, Tolerability, Pharmacokinetics, and Pharmacodynamics of Subcutaneously Administered ALN-4285 in Adult Healthy Volunteers

Run by Alnylam Pharmaceuticals · NCT07295717 · Data updated 2026-11-12

This test will give single ascending doses of ALN-4285 or placebo to healthy adult volunteers to see if the drug is safe and how it behaves in the body.

Quick facts

PhasePhase 1
Study typeInterventional
Ages18 Years to 65 Years
SexAll
Enrollment76 (estimated)
SponsorAlnylam Pharmaceuticals
Industry-sponsored
Locations1 site (London)
StatusRecruiting
StartedDecember 12, 2025
Main results expectedDecember 29, 2026
Study endsMarch 23, 2027
Registry record updatedOctober 20, 2026
Trial IDNCT07295717 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Healthy adults with BMI 18.0–30 kg/m^2, normal or nonclinically significant ECG, normal liver tests and eGFR ≥90 mL/min/1.73 m^2, controlled blood pressure, and no recent investigational drug exposure are the intended participants.

Probably not a fit

People with elevated liver enzymes or bilirubin, reduced kidney function, uncontrolled hypertension, or recent participation in other investigational drug studies are unlikely to benefit from joining this trial.

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

What this trial studies

This Phase 1, randomized, placebo-controlled study enrolls healthy adult volunteers to receive single ascending doses of ALN-4285 or placebo. The trial's primary objectives are to characterize safety, tolerability, and single-dose pharmacokinetics. Participants must meet criteria for BMI, ECG, liver and kidney function, and blood pressure and must not have recent exposure to other investigational agents. The study is sponsored by Alnylam Pharmaceuticals and conducted at a clinical site in London.

Why it matters

Potential benefit: If successful, the results could enable further development of ALN-4285 and support a new RNAi-based treatment option for future patients.

How similar studies have gone: Other RNAi therapeutics from Alnylam and competitors have reached approval and early-phase studies of similar agents have shown predictable PK and manageable safety, but ALN-4285 itself is a novel candidate in humans.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Has a body mass index (BMI) of ≥18.0 kg/m\^2 and ≤30 kg/m\^2
* Has 12-lead ECG within normal limits or with no clinically significant abnormalities in the opinion of the Investigator

Exclusion Criteria:

* Has alanine aminotransferase (ALT) or aspartate aminotransferase (AST) \>upper limit of normal (ULN)
* Has total bilirubin \>ULN
* Has systolic blood pressure \>140 mmHg and/or a diastolic blood pressure \>90 mmHg
* Has an estimated glomerular filtration (eGFR) of \<90 mL/min/1.73m\^2 at screening
* Has received an investigational agent within the last 30 days or 5 half-lives

Where it's running

  • Clinical Trial Site
    London, United Kingdom
    Recruiting

Study contacts

Similar studies

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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.