The purpose of the study is to determine the safety and tolerability of escalating doses of ARC-AAT and to evaluate the pharmacokinetics of ARC-AAT and the effect of ARC-AAT on circulating levels of alpha-1 antitrypsin (AAT). The study will consist of two parts, Part A (conducted in healthy volunteers) and Part B (conducted in AATD patients) at up to 9 escalating dose levels with 6 participants per dose level.
Who can participate
Age range
18 Years – 70 Years
Sex
ALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion Criteria:
(Part A - Healthy Volunteers)
* Male or female healthy volunteers 18-50 years of age
* Written informed consent
* Body mass index between 18.0 and 28.0 kg/m2
* 12-lead electrocardiogram (ECG) at Screening and pre-dose assessment with no clinically significant abnormalities
* Non-pregnant/non-nursing females
* Non-smoker for at least one year with current non-smoking status confirmed by urine cotinine
* Normal lung function (or not clinically significant per investigator assessment) based on spirometry and diffusion capacity of lung for carbon monoxide (DLCO) according to American Thoracic Society (ATS) - European Respiratory Society (ERS) criteria
* Highly effective, double barrier contraception (both male and female partners) during the study and for 3 months following the dose of ARC-AAT
* Willing and able to comply with all study assessments and adhere to protocol schedule
* Suitable venous access for blood sampling
* No abnormal finding of clinical relevance at screening
* Normal AAT level
(Part B-Patients) - As for Part A with the following exceptions:
* Male or female patients 18-70 years of age
* Confirmed diagnosis of homozygous alpha 1-protease inhibitor deficiency (PiZZ genotype) not receiving alpha-1 antitrypsin augmentation therapy for more than 4 weeks
* BMI between 18.0 and 35.0 kg/m2
* Non-smoker for at least three years with current non-smoking status confirmed by urine cotinine
Exclusion Criteria:
(Part A-Healthy Volunteers)
* Curre…
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
What they're measuring
1
Number of Participants With Treatment-Emergent Adverse Events (TEAEs), Serious Adverse Events (SAEs), or Discontinuations Due to TEAEs
Timeframe: From the first dose of study treatment through Day 29 ± 1 day
2
Number of Participants With Clinically Significant Treatment-Emergent Abnormalities in Laboratory Values
Timeframe: Day 1 through Day 29 ± 1 day
3
Number of Participants With Clinically Significant Treatment-Emergent Abnormalities in Vital Signs, Electrocardiograms (ECGs), Pulmonary Function, Physical Findings, and Other Observations
Timeframe: Day 1 through Day 29 ± 1 day
4
Pharmacokinetics of ARC-AAT: Maximum Observed Plasma Concentration (Cmax) for the Analytes AD00370 and ARC-Melittin-Like Peptide (MLP; Part A)
Timeframe: Day 1, 2, and 3 at pre-dose and then at 0.08, 0.5, 1, 3, 6, 24 and 48 hours post-dose
5
Pharmacokinetics of ARC-AAT: Time to Maximum Observed Concentration (Tmax) for the Analytes AD00370 and ARC-MLP (Part A)
Timeframe: Day 1, 2, and 3 at pre-dose and then at 0.08, 0.5, 1, 3, 6, 24 and 48 hours post-dose
6
Pharmacokinetics of ARC-AAT: Area Under the Plasma Concentration Versus Time Curve From Time 0 to Time 24 Hours (AUC0-24) for the Analytes AD00370 and ARC-MLP (Part A)
Timeframe: Day 1, 2, and 3 at pre-dose and then at 0.08, 0.5, 1, 3, 6, 24 and 48 hours post-dose
7
Pharmacokinetics of ARC-AAT: Area Under the Plasma Concentration Versus Time Curve From From Zero to Infinity (AUCinf) for the Analytes AD00370 and ARC-MLP (Part A)
Timeframe: Day 1, 2, and 3 at pre-dose and then at 0.08, 0.5, 1, 3, 6, 24 and 48 hours post-dose
8
Pharmacokinetics of ARC-AAT: Terminal Elimination Rate Constant Obtained From the Slope of the Line (Kel) for the Analytes AD00370 and ARC-MLP (Part A)
Timeframe: Day 1, 2, and 3 at pre-dose and then at 0.08, 0.5, 1, 3, 6, 24 and 48 hours post-dose
9
Pharmacokinetics of ARC-AAT: Half-Life (t1/2) for the Analytes AD00370 and ARC-MLP (Part A)
Timeframe: Day 1, 2, and 3 at pre-dose and then at 0.08, 0.5, 1, 3, 6, 24 and 48 hours post-dose
10
Percentage Reduction From Baseline of AAT Up to Day 29