A Phase 1/2 interventional study of ATR 1072 in Cardiac Glycogenosis, Cardiomyopathy and Hypertrophic, sponsored by Atrium Therapeutics. Recruiting at 1 site in United States. Open to participants aged 18 Years to 65 Years. Per ClinicalTrials.gov, last updated 2026-09-18.
Sponsored by Atrium Therapeutics · Phase 1/2, Interventional, and Treatment
ATR 1072 is an investigational medicine being studied in adults with PRKAG2 Syndrome. This study will evaluate the safety of ATR 1072 and how the body processes the drug. Researchers will also assess how ATR 1072 affects PRKAG2 activity and measures of heart disease.
ATR 1072 is an antibody-oligonucleotide conjugate (AOC) designed to reduce expression of PRKAG2 through targeted delivery of siRNA to cardiac tissue. This first-in-human, Phase 1/2, open-label, multicenter study will evaluate the safety, tolerability, pharmacokinetics, pharmacodynamics, and exploratory efficacy of multiple doses of ATR 1072 in adults with PRKAG2 Syndrome. The study consists of a multiple ascending dose portion (Part A) followed by a dose-expansion cohort at the dose selected in (Part A). After completion of a 48-week treatment period, participants in Parts A and B enter a 42-week extension period followed by a post-treatment follow-up of up to 18 weeks. Approximately 37 participants will be enrolled globally.
553 studies on the registry are indexed under Cardiomyopathies; 152 are open to participants now.
This study's planned enrollment of 37 is below the median of 51 across 266 interventional studies indexed under Cardiomyopathies.
Browse Cardiomyopathies studies →This is the only study on the registry with Atrium Therapeutics as lead sponsor.
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Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
A biopsy takes a small piece of tissue to examine. “Archival tissue” is a sample already taken, for example at diagnosis, and kept by the hospital.
Whether a stored sample will do depends on when it was taken, how much there is and what the study needs. Ask whether the study accepts your stored sample or needs a new biopsy.
The New York Heart Association’s four classes of how much heart failure limits physical activity.
Studies set their own limit — many outside heart failure leave out class III–IV, while heart failure studies may ask for a particular class. Check the class this study names.
The share of blood the heart’s main pumping chamber (the left ventricle) pushes out with each beat, measured by an echocardiogram (heart ultrasound) or a MUGA scan. About 50–70% is normal.
Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.
A drug or device being studied in a clinical trial.
It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.
A planned gap after a treatment, so that its effects can lessen before the study treatment or a study assessment. Ask the study team and the doctor who prescribed it before changing any medicine.
Biopsy and archival tissue
A biopsy takes a small piece of tissue to examine. “Archival tissue” is a sample already taken, for example at diagnosis, and kept by the hospital.
Whether a stored sample will do depends on when it was taken, how much there is and what the study needs. Ask whether the study accepts your stored sample or needs a new biopsy.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
NYHA class (heart failure)
The New York Heart Association’s four classes of how much heart failure limits physical activity.
Studies set their own limit — many outside heart failure leave out class III–IV, while heart failure studies may ask for a particular class. Check the class this study names.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
LVEF (left ventricular ejection fraction)
The share of blood the heart’s main pumping chamber (the left ventricle) pushes out with each beat, measured by an echocardiogram (heart ultrasound) or a MUGA scan. About 50–70% is normal.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Clinically significant
Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Investigational drug or device
A drug or device being studied in a clinical trial.
It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Washout period
A planned gap after a treatment, so that its effects can lessen before the study treatment or a study assessment. Ask the study team and the doctor who prescribed it before changing any medicine.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Three sequential ascending dose cohorts (Dose Level 1, Dose Level 2 and Dose Level 3) with approximately 4 evaluable participants per cohort. ATR 1072 administered intravenously (IV) every 6 weeks (Q6W) for up to 8 doses (48-week treatment period).
Drug: ATR 1072
Approximately 25 participants enrolled at the recommended phase 2 dose determined in Part A. ATR 1072 administered IV Q6W to further evaluate safety, PK, and pharmacodynamics.
Drug: ATR 1072
ATR 1072 is an investigational therapy that delivers an siRNA to reduce PRKAG2 gene expression. Administered as an intravenous (IV) infusion every 6 weeks (Q6W). Formulated as a sterile liquid for injection.
Incidence of treatment-emergent adverse events (TEAEs)
Incidence and severity of treatment-emergent adverse events (TEAEs).
Time frame: From first dose through end of study (approximately 48 weeks per participant)
Change from baseline in cardiac muscle tissue concentration of ATR 1072 siRNA
siRNA content in endomyocardial biopsy samples measured by quantitative bioanalytical methods to characterize cardiac tissue distribution.
Time frame: Through Week 24
Plasma pharmacokinetic (PK) parameters of ATR 1072
Peak Plasma Concentration (Cmax)
Time frame: Through Week 24
Plasma pharmacokinetic parameters of ATR 1072
Area under the plasma concentration versus time curve (AUC)
Time frame: Through week 48
Plasma pharmacokinetic parameters of ATR 1072
terminal half-life (t1/2)
Time frame: Through week 48
Plan to share: Undecided — No individual participant data (IPD) sharing plan has been finalized at the time of registration. The sponsor is committed to transparent reporting of study results. IPD sharing practices will be determined in accordance with applicable regulations, sponsor policies, and any applicable collaboration agreements.
No publications or documents are linked to this record.
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