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A Study of Olezarsen (ISIS 678354) in Participants With Hypertriglyceridemia and Atherosclerotic Cardiovascular Disease, or With Severe Hypertriglyceridemia

A Randomized, Double-blind, Placebo-Controlled, Phase 3 Study of Olezarsen (ISIS 678354) in Patients With Hypertriglyceridemia and Atherosclerotic Cardiovascular Disease (Established or at Increased Risk for), or With Severe Hypertriglyceridemia

Status
Completed
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05610280
Enrollment
1478
Registered
2022-11-09
Start date
2022-11-21
Completion date
2025-06-09
Last updated
2026-02-10

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Atherosclerosis, Cardiovascular Diseases, Hypertriglyceridemia

Keywords

ISIS 678354, Olezarsen

Brief summary

The purpose of the study is to evaluate the effect of olezarsen on percent change in fasting triglyceride (TG) levels compared to placebo in participants with hypertriglyceridemia and atherosclerotic cardiovascular disease, or with severe hypertriglyceridemia.

Detailed description

This is a Phase 3, multi-center, placebo-controlled study in approximately 1475 participants with hypertriglyceridemia and atherosclerotic cardiovascular disease. The study consists of 3 periods: 1) Screening Period: Week -12 to Week -1 (up to 12 weeks); 2) Treatment Period up to Week 53; and 3) Post-Treatment Follow-up Period: Week 54 to Week 66 (13 weeks). Participants enrolled will receive olezarsen or placebo once every 4 weeks during the 53-week Treatment Period. The Screening Period was extended with no impact to overall study timelines. A coronary computed tomographic angiography (CTA) sub study will be performed to assess whether triglyceride lowering through inhibition of apoC-III protein synthesis may reduce coronary plaque progression.

Interventions

Olezarsen will be administered by SC injection.

DRUGPlacebo

Olezarsen-matching placebo will be administered by SC injection.

Sponsors

Ionis Pharmaceuticals, Inc.
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Participants must fall into 1 of the following groups (a or b): a. Hypertriglyceridemia with fasting TG ≥200 mg/dL (2.26 millimoles per liter \[mmol/L\]) and \<500 mg/dL (5.65 mmol/L) with either * Clinical diagnosis of atherosclerotic cardiovascular disease (ASCVD) or * At increased risk for ASCVD b. Severe hypertriglyceridemia with fasting TG ≥500 mg/dL (5.65 mmol/L) * Participants should be on standard of care (SOC) lipid-lowering medications per local guidelines. Lipid-lowering medications should be optimized and stabilized for at least 4 weeks prior to Screening to minimize changes in these medications during the study.

Exclusion criteria

* Hemoglobin A1c (HbA1c) ≥ 9.5% at Screening * Alanine aminotransferase or aspartate aminotransferase \> 3.0 × upper limit of normal * Total bilirubin \> 1.5 upper limit of normal unless due to Gilbert's syndrome * Estimated GFR \< 30 mL/min/1.73 m\^2 NOTE: Other Inclusion/

Design outcomes

Primary

MeasureTime frame
Percent Change From Baseline to Week 25 in Fasting Triglycerides (TG) Compared to PlaceboBaseline to Week 25

Secondary

MeasureTime frame
Percent Change From Baseline to Week 53 in Fasting TG Compared to PlaceboBaseline to Week 53
Proportion of Participants who Achieve Fasting TG <150 Milligrams per Deciliter (mg/dL) at Weeks 25 and 53 Compared to PlaceboBaseline, Weeks 25 and 53
Percent Change From Baseline to Weeks 25 and 53 in Fasting Apolipoprotein C-III (apoC-III) Compared to PlaceboBaseline to Weeks 25 and 53
Percent Change From Baseline to Weeks 25 and 53 in Fasting Very Low-Density Lipoprotein-Cholesterol (VLDL)-C Compared to PlaceboBaseline to Weeks 25 and 53
Percent Change From Baseline to Weeks 25 and 53 in Fasting Remnant Cholesterol Compared to PlaceboBaseline to Weeks 25 and 53
Percent Change From Baseline to Weeks 25 and 53 in Fasting non-High Density Lipoprotein-Cholesterol (HDL)-C Compared to PlaceboBaseline to Weeks 25 and 53
Percent Change From Baseline to Weeks 25 and 53 in Fasting High-Density Lipoprotein-Cholesterol (HDL)-C Compared to PlaceboBaseline to Weeks 25 and 53
Percent Change From Baseline to Weeks 25 and 53 in Fasting Apolipoprotein B (apoB) Compared to PlaceboBaseline to Weeks 25 and 53
Percent Change From Baseline to Weeks 25 and 53 in Fasting Low-Density Lipoprotein-Cholesterol (LDL)-C Compared to PlaceboBaseline to Weeks 25 and 53

Countries

Bulgaria, Canada, Czechia, Denmark, France, Hungary, Italy, Netherlands, Norway, Poland, Portugal, Slovakia, Spain, United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 11, 2026