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Purpose

This study will evaluate the efficacy and safety of plozasiran in approximately 288 adult participants with severe hypertriglyceridemia (SHTG) and history of at least two prior acute pancreatitis (AP) events not attributed to other etiologies, with at least one occurring within the last 12 months prior to screening. Eligible participants will be randomly assigned in a double-blind manner to either receive plozasiran 25 mg by subcutaneous (SC) injection every three months (Q3M) or matching placebo. Enrolled participants will be counseled to remain on the specified low-fat diet and background medications throughout the study. Following completion of the double-blind treatment period, or if the participant has a positively adjudicated AP event (whichever occurs first), participants will transition to the 12-month Open-Label Extension (OLE) treatment period receiving plozasiran 25 mg by SC injection Q3M.

Condition

Eligibility

Eligible Ages
Over 18 Years
Eligible Sex
All
Accepts Healthy Volunteers
No

Inclusion Criteria

  • Males, or nonpregnant (who do not plan to become pregnant) nonlactating females - Established diagnosis of SHTG and prior documented evidence of fasting TG levels of ≥ 880 mg/dL (≥ 10 mmol/L) - Documented evidence of at least 1 prior AP event not attributed to other etiologies occurring within the last 60 months prior to Screening. - Fasting low-density lipoprotein cholesterol (LDL-C) ≤ 130 mg/dL (≤ 3.37 mmol/L) at Screening - Screening hemoglobin A1c (HbA1c) ≤ 9.5% - Willing to follow diet counseling and maintain a stable low-fat diet - Must be on standard of care lipid and TG-lowering medications per local guidelines (unless documented as intolerant, or a treatment failure as determined by the Investigator)

Exclusion Criteria

  • Use of any hepatocyte-targeted small interfering ribonucleic acid (siRNA) that targets lipids and/or triglycerides within 365 days before Day 1, except inclisiran. - Use of any other hepatocyte targeted siRNA or antisense oligonucleotide molecule within 60 days or within 5 half-lives lives before day 1. Whichever is longer. - AP ≤ 4 weeks prior to Randomization/Day 1 - Body mass index (BMI) > 45 kg/m^2 - Any planned bariatric surgery or similar procedures to induce weight lost starting at consent through End of Study (EOS) - Planned coronary intervention (e.g. stent placement or heart bypass) during the study - History of arterial revascularization within 16 weeks of Screening - History of acute coronary syndrome event within 24 weeks of Screening - Recent atherosclerotic cardiovascular disease (ASCVD) event within 24 weeks of Screening - Recent unstable or symptomatic cardiac arrhythmia (including any associated medication changes) within 90 days of Screening. Individuals with stable well-controlled atrial arrhythmia will be allowed to participate in the study - History of pacemaker or automatic implantable cardioverter defibrillators implant within 30 days before Screening - New York Heart Association Class III-IV heart failure or last known ejection fraction of < 30% - Current diagnosis of nephrotic syndrome - Chronic kidney disease, defined by an estimated glomerular filtration rate (eGFR) < 20 mL/min/1.73 m^2 - Liver disease defined as cirrhosis or Child-Pugh Class B and C, or alanine aminotransferase (ALT) or aspartate aminotransferase (AST) >2.5× Upper Limit of Normal (ULN) at Screening Note: Additional Inclusion/Exclusion Criteria may apply per protocol

Study Design

Phase
Phase 3
Study Type
Interventional
Allocation
Randomized
Intervention Model
Parallel Assignment
Primary Purpose
Treatment
Masking
Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)

Arm Groups

ArmDescriptionAssigned Intervention
Experimental
Plozasiran Injection 		Plozasiran by SC injection every 3 months (Q3M) through completion of the randomized period Plozasiran by SC injection Q3M through completion of the OLE period
  • Drug: Plozasiran
    ARO-APOC3 injection
    Other names:
    • ARO-APOC3
Experimental
Placebo 		calculated volume to match active treatment by SC injection (randomized period)
  • Drug: Placebo
    sterile normal saline (0.9% NaCl)

Recruiting Locations

Research Site
Los Angeles, California 90027

Clinical Research Site 4
Santa Clarita, California 91321

Research Site
New Haven, Connecticut 06519

Clinical Research Site 6
Springfield, Illinois 62702

Research Site
Indianapolis, Indiana 46202

Research Site
Kansas City, Kansas 66160

Research Site
Ann Arbor, Michigan 48109

Research Site
St Louis, Missouri 63110

Clinical Research Site 5
North Platte, Nebraska 69101

Research Site
New York, New York 10029

Clinical Research Site 3
Greensboro, North Carolina 27401

Research Site
Wilmington, North Carolina 28412

Clinical Research Site 7
Philadelphia, Pennsylvania 19107

Research Site
Pittsburgh, Pennsylvania 15213

Clinical Research Site 1
Mesquite, Texas 75149

Clinical Research Site 2
San Antonio, Texas 78233

Research Site
Seattle, Washington 98109

More Details

Status
Recruiting
Sponsor
Arrowhead Pharmaceuticals

Study Contact

Medical Monitor
626-304-3400
plozasiran@arrowheadpharma.com

Notice

Study information shown on this site is derived from ClinicalTrials.gov (a public registry operated by the National Institutes of Health). The listing of studies provided is not certain to be all studies for which you might be eligible. Furthermore, study eligibility requirements can be difficult to understand and may change over time, so it is wise to speak with your medical care provider and individual research study teams when making decisions related to participation.