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

First-in-human test of ARO-033 in adults

Official title: A First-In-Human Dose-Escalating Study to Evaluate the Safety, Tolerability, Pharmacokinetics, and Pharmacodynamics of Single and Multiple Doses of ARO-033 in Adult Participants

Run by Arrowhead Pharmaceuticals · NCT07662096 · Data updated 2026-11-12

This study tests whether ARO-033 is safe and tolerable, and how it behaves in the body, in healthy adults and in adults with age-related macular degeneration.

Quick facts

PhasePhase 1
Study typeInterventional
Ages18 Years to 65 Years
SexAll
Enrollment84 (estimated)
SponsorArrowhead Pharmaceuticals
Industry-sponsored
Locations1 site (Auckland)
StatusRecruiting
StartedJune 25, 2026
Main results expectedJuly 1, 2028
Study endsJuly 1, 2028
Registry record updatedSeptember 15, 2026
Trial IDNCT07662096 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are adults 50 years or older with diagnosed AMD (both eyes) for the AMD cohorts and healthy adults 18–65 for the NHV cohorts, with BMI 18.0–35.0 and no pregnancy or breastfeeding plans.

Probably not a fit

Patients with conditions outside the eligibility criteria or those who do not respond to the study drug may not experience benefit.

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 first-in-human, Phase 1 trial evaluating ARO-033. It includes single and multiple dose parts in healthy volunteers to characterize safety, tolerability, pharmacokinetics and pharmacodynamics, and a multiple-dose AMD cohort to assess safety, PK/PD and preliminary efficacy. The study compares ARO-033 to placebo across the different cohorts. Eligibility requires adults 18-65 for NHVs and 50+ for AMD participants, with BMI 18.0–35.0, and no significant safety concerns at screening. Exclusion includes HIV infection and other standard safety exclusions.

Why it matters

Potential benefit: If successful, participants with AMD could gain insight into a potential future treatment option.

How similar studies have gone: Previous early-phase studies with similar approaches show safety and PK signals; this is an initial human study for this specific agent.

Who can join: the full rules

Show full inclusion / exclusion criteria
Key Inclusion Criteria:

* NHV cohorts only: Adults 18 to 65 years of age who are not pregnant, not breastfeeding, and do not plan to become pregnant (or impregnate their partners) during the study and for at least 90 days following the end of the study.
* AMD cohorts only: Adults ≥50 years of age who are not pregnant, not breastfeeding, and do not plan to become pregnant (or impregnate their partners) during the study and for at least 90 days following the end of the study.
* Body mass index (BMI) between 18.0 and 35.0 kilograms (kg)/square meter (m\^2), inclusive.
* No abnormal finding of clinical relevance at the Screening evaluation that in the opinion of the Investigator could adversely impact participant's safety during the study or adversely impact study results.
* AMD cohorts only: A clinical diagnosis of AMD in both eyes as determined by the Investigator and confirmed by the central reading center.

Key Exclusion Criteria:

All Cohorts:

* Human immunodeficiency virus (HIV) infection, as shown by the presence of anti-HIV antibody (seropositive).
* Seropositive for hepatitis B virus (HBV) (hepatitis B surface antigen positive at screening) or hepatitis C virus (HCV) (HCV antibody positive with reflex confirmation using HCV RNA amplification at Screening). Cured HCV (positive antibody test without detectable HCV RNA) is permitted if HCV RNA has been negative for at least 2 years.
* Uncontrolled hypertension (resting systolic blood pressure ≥160 millimeters of mercury \[mmHg\] or diastolic blood pressure ≥95 mmHg, confirmed by repeat measurement, at Screening).
* Evidence of clinically significant immunocompromising condition (for example, primary immunodeficiency syndrome, aplastic anemia, known or suspected complement factor deficiency, or any other condition resulting in significantly impaired immune response as evidenced by recurrent infections), or recent/ongoing treatment with immunosuppressive agents.
* History of major surgery within 90 days of Screening.
* Use of an investigational agent or device within 30 days or 5 half-lives (whichever is longer) prior to dosing or current participation in an investigational study. Participants recently participating in studies involving investigational agents with prolonged therapeutic effect (such as ribonucleic acid interference \[RNAi\] therapeutics, cell or gene therapies) and whose last dose was less than 12 months prior to the first dose of study intervention, should be discussed with the Medical Monitor.
* Any medical condition or clinically significant laboratory abnormality at Screening that in the opinion of the Investigator should exclude the participant from participation, preclude safe and successful completion of the study, or confound study results.

AMD Cohorts Only:

* Any ocular condition in the study eye that may be expected to progress and that may affect central vision or otherwise be a confounding factor during the study, as determined by the Investigator.
* Atrophic retinal disease due to causes other than AMD (for example, drug-induced, Stargardt disease, cone rod dystrophy) in either eye.

Note: Other protocol-defined inclusion and exclusion criteria may apply.

Where it's running

  • Research Site 1
    Auckland, New Zealand
    Recruiting

Study contacts

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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.