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NCT Number: NCT07624071

A Study to Evaluate ALN-6222 in Participants With Obesity

This is a first in human, randomized, double-blind (DB), placebo-controlled, single ascending dose (SAD), Phase 1 study to evaluate the safety, tolerability, pharmacokinetics (PK), pharmacodynamics (PD), and efficacy of ALN-6222 administered subcutaneously (SC) in adult participants with obesity.

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Key information

Conditions

Obesity Body Weight Nutrition Disorders Nutritional and Metabolic Diseases Overnutrition Overweight Pathological Conditions, Signs and Symptoms Signs and Symptoms

Age range

18 year–65 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 1

Primary location

Clinical Trial Site

Mount Royal, H3P 3P1, Canada

Location status: Recruiting

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

-

  • Is an adult patient with a body mass index ≥30 kg/m^2 to <40 kg/m^2
  • Has a hemoglobin A1c <6.5%

Exclusion criteria

-

  • Has alanine aminotransferase (ALT) or aspartate aminotransferase (AST) >1.5 times the upper limit of normal (ULN)
  • Has known human immunodeficiency virus (HIV) infection; or known current or chronic hepatitis C virus or hepatitis B virus infection
  • Has an estimated glomerular filtration (eGFR) of <60 mL/min/1.73m^2 at screening

Note: other protocol defined inclusion / exclusion criteria apply

Treatment and study plan

ALN-6222

Drug

ALN-6222 will be administered subcutaneously (SC).

Placebo

Drug

Placebo will be administered SC.

Primary outcomes

  1. Frequency of Adverse Events

    Time frame: Up to 12 months

Secondary outcomes

  1. Concentrations of ALN-6222 in Plasma

    Time frame: Predose and up to 3 days postdose

  2. Change from Baseline Protein Markers in Plasma

    Time frame: Predose and up to 12 months postdose

Study contacts

Contact information is provided by the study sponsor or research team.

Alnylam Clinical Trial Information Line

CONTACT

[email protected]

1-877-ALNYLAM

Alnylam Clinical Trial Information Line

CONTACT

[email protected]

1-877-256-9526

Sponsors and collaborators

Lead sponsor

Alnylam Pharmaceuticals

Industry

Registry information

Official study title

A Phase 1, Randomized, Double-blind, Placebo-controlled Study of the Safety, Tolerability, Pharmacokinetics, Pharmacodynamics, and Efficacy of ALN-6222 in Adult Participants With Obesity

Important dates

Study start
2026
Primary completion
2027
Study completion
2027
First posted
Jun 3, 2026
Registry last updated
Aug 12, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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