HypertriglyceridemiaPhase 3NCT05610280
A Study of Olezarsen (ISIS 678354) in Participants With Hypertriglyceridemia and Atherosclerotic Cardiovascular Disease, or With Severe Hypertriglyceridemia
A Phase 3 study testing Olezarsen in people with Hypertriglyceridemia and Cardiovascular Diseases, run by Ionis Pharmaceuticals, Inc. at 168 sites in 14 countries.
Trial 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. Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Hypertriglyceridemia, Cardiovascular Diseases, Atherosclerosis
- What is being tested?
- Olezarsen
- Type of treatment
- Injection or infusion
- Could I receive a placebo?
- Yes, some participants may receive a placebo
- How many people
- 1,478 participants
- Where
- 168 sitesin 14 countries
- Study dates
- 21 Nov 2022to 9 Jun 2025
- Phase
- Phase 3
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Participants must fall into 1 of the following groups (a or b):
- 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
- 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.
Who cannot join
- 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/Exclusion criteria may apply.
Trial locations and contacts
168 sites in 14 countries.
168 sites in 14 countries
United States68 sites
Maryland Cardiovascular Specialists
Baltimore, Maryland, 21229
Cardiovascular Research Foundation of Southern California
Beverly Hills, California, 90210
Westside Medical Associates of Los Angeles
Beverly Hills, California, 90211
Alabama Clinical Therapeutics, LLC Alabaster
Birmingham, Alabama, 35235
Excel Clinical Medical Trials
Boca Raton, Florida, 33434
Aultman Hospital Cardiology Clinical Trials
Canton, Ohio, 44710
Medical University of South Carolina (MUSC)
Charleston, North Carolina, 29425
Charleston Area Medical Center (CAMC) Clinical Trials Center
Charleston, West Virginia, 25304
Centricity Research
Columbus, Georgia, 31904
McConnell Heart Health Center
Columbus, Ohio, 43214
West Broadway Clinic
Council Bluffs, Iowa, 51501
Central Oklahoma Early Detection Center
Edmond, Oklahoma, 73034
Evanston Premier Healthcare Research LLC
Evanston, Illinois, 60201
Aa Mrc, Llc
Flint, Michigan, 48504
Finlay Medical Research - West Palm
Greenacres City, Florida, 33467
Moses H. Cone Memorial Hospital
Greensboro, North Carolina, 27401
Clinical Investigation Specialists, Inc
Gurnee, Illinois, 60031
Global Research Associates
Homestead, Florida, 33030
Baylor College of Medicine
Houston, Texas, 77030
Juno Research, LLC
Houston, Texas, 77040
Diabetes/Lipid Management & Research Center
Huntington Beach, California, 92648
Heart Center Research PC
Huntsville, Alabama, 35801
The Jackson Clinic
Jackson, Tennessee, 38301
University of Kansas Medical Center (KUMC)
Kansas City, Kansas, 66160
University of California, San Diego (UCSD)
La Jolla, California, 92037
3Sync Research
Lake Worth, Florida, 33460
Green and Seidner Family Practice Associates
Lansdale, Pennsylvania, 19446
Palm Research Center, Inc.
Las Vegas, Nevada, 49148
Clinical Research of South Nevada
Las Vegas, Nevada, 89104
Palm Research Center, Inc.
Las Vegas, Nevada, 89148
Clinical Trials Research
Lincoln, California, 95648
Main Street Physicians Care Waterway
Little River, South Carolina, 29566
Norton Cardiovascular Associates
Louisville, Kentucky, 40205
Louisville Metabolic and Atherosclerosis Research Center
Louisville, Kentucky, 40213
Carient Heart & Vascular
Manassas, Virginia, 20109
Manassas Clinical Research Center
Manassas, Virginia, 20110
Texas Institute of Cardiology
McKinney, Texas, 75071
Southern Endocrinology Associates
Mesquite, Texas, 75149
Finlay Medical Research
Miami, Florida, 33126
Advanced Medical Research Institute (AMRI)
Miami, Florida, 33174
De La Cruz Research Center, LL
Miami, Florida, 33184
Cardiovascular Research of Northwest Indiana, LLC
Munster, Indiana, 46321
Affinity Health Corp.
Nashville, Tennessee, 37203
Suncoast Clinical Research, Inc. - New Port Richey
New Port Richey, Florida, 34652
Suncoast Clinical Research, Inc. - Palm Harbor
New Port Richey, Florida, 34652
Amicis Research
Northridge, California, 91324
Valley Clinical Trials, Inc.
Northridge, California, 91325
Proactive Clinical Research
Oakland Park, Florida, 33309
Ocala Cardiovascular Research
Ocala, Florida, 34471
Affinity Health
Park Ridge, Illinois, 60068
Comprehensive Medical & Research Center
Plantation, Florida, 33317
Progressive Medical Research
Port Orange, Florida, 32127
Monument Health Clinical Research
Rapid City, South Dakota, 57701
Health Concepts
Rapid City, South Dakota, 57702
Reid Hospital and Health Care Services
Richmond, Indiana, 47374
OnSite Clinical Solutions, LLC
Rock Hill, South Carolina, 29732
FMC Science
Round Rock, Texas, 78681
Northern California Research
Sacramento, California, 95821
St. Johns Center for Clinical Research
Saint Augustine, Florida, 32086
Amicis Research Center
Santa Clarita, California, 91344
Summit Research Group, LLC
Stow, Ohio, 44224
JSV Clinical Research Study, Inc
Tampa, Florida, 33634
Metabolic Institute of America
Tarzana, California, 91356
Lundquist Institute for Biomedical Innovation at Harbor UCLA Medical Center
Torrance, California, 90502
Atlanta Heart Specialists
Tucker, Georgia, 30084
Tennessee Center for Clinical Trials
Tullahoma, Tennessee, 37388
Amicis Research Center
Valencia, California, 91355
Mercy One Iowa Heart Center
West Des Moines, Iowa, 50266
Netherlands15 sites
Academic Medical Center - Department of Vascular Medicine
Amsterdam, 1105AZ
Ziekenhuis Rijnstate
Arnhem, 6815 AD
Reinier de Graaf Gasthuis
Delft, 2625 AD
Deventer Ziekenhuis
Deventer, 7416 SE
Het Van Weel-Bethesda Ziekenhuis
Dirksland, 3247 BW
Groene Hart Ziekenhuis
Gouda, 2803 HH
Spaarne Gasthuis
Haarlem, 2035 RC
Zuyderland Medisch Centrum
Heerlen, 6419 PC
Bethesda Diabetes Research Center
Hoogeveen, 7909 AA
Canisius-Wilhelmina Ziekenhuis (CWZ)
Nijmegen, 6532 SZ
D&A Research
Sneek, 8601 ZR
Universitair Medisch Centrum Utrecht
Utrecht, 3584 CX
Maxima Medisch Centrum
Veldhoven, 5504 DB
Albert Schweitzer Ziekenhuis - Location Dordrecht
Zwijndrecht, 3331 LZ
Albert Schweitzer Ziekenhuis
Zwijndrecht, 3331 LZ
Canada13 sites
Centricity Research - Barrie Endocrinology
Barrie, L4N 7L3
Centricity Research - Brampton Endocrinology
Brampton, L6S 6J6
Ecogene-21
Chicoutimi, Quebec, G7H 7K9
Centricity Research - Vaughan Endocrinology
Concord, Ontario, L4K 4M2
Centricity Research - Etobicoke Endocrinology
Etobicoke, Ontario, M9R 4E1
Montreal Heart Institute - Institut de Cardiologie de Montreal
Montreal, Quebec, H1T 1C8
Institute de Recherches Cliniques de Montreal
Montreal, Quebec, H2W 1R7
Centricity Research - Oshawa Multispecialty
Oshawa, Ontario, L1J 2K9
Clinique des Maladies Lipidiques de Quebec Inc.
Québec, Quebec, G1V 4W2
Centre de Recherche Saint-Louis
Québec, G1W 4R4
Bluewater Clinical Research Group Inc
Sarnia, Ontario, N7t 4X3
Centricity Research - Toronto LMC Multispecialty
Toronto, Ontario, M4G 3E8
ARC Biosystems
Vancouver, British Columbia, V6Z 2C7
Poland13 sites
SALVIA Lekston i Madej s.j.
Katowice, 40-772
Jagiellonskie Centrum Innowacji Sp. z o.o.
Krakow, 30-348
Krakowskie Centrum Medyczne Sp. z o.o.
Krakow, 31-501
FutureMeds
Lodz, 91-363
INSTYTUT CENTRUM ZDROWIA MATKI POLKI - Klinika Kardiologii i Wad Wrodzonych Doroslych
Lodz, 93-338
Praktyka Lekarska Ewa Krzyzagorska
Poznan, 61-655
FutureMeds Warszawa Centrum
Warsaw, 00-215
Clinical Best Solutions Sp. z.o.o Spolka Komandytowa
Warsaw, 00-710
FutureMeds - Centrum Medyczne AMED Warszawa Targowek
Warsaw, 03-291
Narodowy Instytut Kardiologii Stefana kardynala Wyszynskiego - Panstwowy Instytut Badawczy, Klinika Kardiologii i Angiologii Interwencyjnej
Warsaw, 04-628
FutureMeds Sp. z o.o
Wroclaw, 50-088
Slaski Park Technologii Medycznych Kardio-Med Silesia Sp. z o. o
Zabrze, 48-100
ETG Zamosc - Pro Life Medica Sp. z o.o
Zamość, 22-400
Bulgaria11 sites
MHAT Sv. Ivan Rilski - 2003 OOD
Dupnitsa, 2600
University Multiprofile Hospital for Active Treatment Pulmed OOD
Plovdiv, 4000
SHATC Medica Cor EAD
Rousse, 7013
Medical Center for Specialized Medical Help in Cardiovascular Diseases OOD
Sofia, 1000
MBAL National Cardiology Hospital
Sofia, 1309
University Multiprofile Hospital for Active Treatment Alexandrovska
Sofia, 1431
University Multiprofile Hospital for Active Treatment
Sofia, 1431
Medico Dental Center ISUL Tsaritsa Yoanna EOOD
Sofia, 1527
UMHAT Prof. Dr. Stoyan Kirkovich
Stara Zagora, 6003
Diagnostic Consultative Center Equita (DCC Equita)
Varna, 9000
Specialized Hospital for Active Treatment of Cardiology
Varna, 9020
Spain10 sites
Hospital Abente y Lago
A Coruña, 15001
Hospital Germans Trias i Pujol
Badalona, 8916
Hospital de la Santa Creu i Sant Pau
Barcelona, 8025
Calle Villarroel 170
Barcelona, 8036
Hospital Universitario Reina Sofia
Córdoba, 14004
Hospital Clinico Universitario Virgen de la Arrixaca
El Palmar, 30120
Hospital Clinico San Carlos
Madrid, 28040
Hospital Universitario Virgen de la Victoria
Málaga, 29010
Hospital Universitario Virgen Macarena
Seville, 41009
Hospital Universitario Virgen del Rocio
Seville, 41013
Czechia8 sites
UNIVMED s.r.o. - Kardiologicka Ambulance
Brno, 60300
Cevni ambulance - MATMED s.r.o.
Hodonín, 695 01
Edumed s.r.o., Kardiologicka, endokrinologicka, diabetologicka a interni ambulance Nachod
Jaroměř, 551 01
Affidea Praha s.r.o.
Prague, 148 00
Diabetologicka a endokrinologicka ambulance Milan Kvapil s.r.o
Prague, 149 00
Endokrinologie Cerny Most s.r.o.
Prague, 19800
AeskuLab k.s
Teplice, 415 01
MUDr. Nina Zemkova s.r.o. Interni Ambulance
Uherské Hradiště, 686 68
Italy7 sites
IRCCS Azienda Ospedaliero-Universitaria di Bologna - Policlinico di Sant'Orsola
Bologna, 40138
ASST NORD MILANO-Ospedale Edoardo Bassini
Cinisello Balsamo, 20092
Azienda Ospedaliero-Universitaria di Ferrara-Arcispedale Sant'Anna
Cona, 44124
Centro Cardiologico Monzino
Milan, 20138
ASST Grande Ospedale Metropolitano Niguarda
Milan, 20162
Azienda Ospedaliera Universitaria Policlinico Paolo Giaccone
Palermo, 90127
Fondazione Policlinico Universitario A. Gemelli IRCCS - Universita Cattolica del Sacro Cuore
Rome, 168
Denmark6 sites
Aarhus University Hospital
Aarhus, 8000
Sydvestjysk Hospital
Esbjerg, 6700
Gentofte Hospital
Hellerup, 2900
Godstrup Regional Hospital (Gødstrup)
Herning, 7400
OUH Svendborg Hospital
Svendborg, 5700
Viborg Regional Hospital
Viborg, 8800
France5 sites
HCL Hopital Louis Pradel
Bron, 69677
CHU Dijon Bourgogne - Hopital Francois Mitterrand
Dijon, 21000
AP-HP Hopital Pitie-Salpetriere
Paris, 75013
Groupement de Cooperation Sanitaire (GCS) ELSAN - Polyclinique Vauban
Valenciennes, 59300
GHM les Portes du Sud
Vénissieux, 69200
Portugal4 sites
Centro Hospitalar de Lisboa Ocidental. E.P.E, - Hospital Santa Cruz
Carnaxide, 2790-134
Centro Hospitalar de Lisboa Ocidental, EPE - Hospital Egas Moniz
Lisbon, 1349-019
Centro Hospitalar Universitario de Lisboa Norte - Hospital de Santa Maria
Lisbon, 1649-036
Centro Hospitalar de Vila Nova de Gaia/Espinho EPE
Vila Nova de Gaia, 4434-502
Slovakia4 sites
Alian, s.r.o., Kardiologicka ambulancia
Bardejov, 085 01
Cardio D&R, S.R.O. Kosice
Košice, 040 22
Diab sro
Rožňava, 048 01
Interna SK, s.r.o., Kardiologicka a interna ambulancia
Svidník, 8901
Hungary3 sites
Clinexpert Kft.
Budapest, 1033
Obudai Egeszsegugyi Centrum
Budapest, H-1036
CRU Hungary Kft.
Encs, H-3860
About this study
Official title: 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
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.
Read the 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.
- Being tested
- Olezarsen, Placebo
- Keywords
- ISIS 678354, Olezarsen
- Medical subject headings
- Hypertriglyceridemia, Cardiovascular Diseases, Atherosclerosis
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
OlezarsenDrug
Also called ISIS 678354, AKCEA-APOCIII-LRx
Olezarsen will be administered by SC injection.
PlaceboDrug
Olezarsen-matching placebo will be administered by SC injection.
| Study group | Role | What they receive |
|---|---|---|
| Olezarsen | Experimental | Participants will be randomized to receive multiple doses of olezarsen, once every 4 weeks by subcutaneous (SC) injection up to Week 49. Receives: Drug: Olezarsen |
| Placebo | Placebo comparator | Participants will be randomized to receive olezarsen-matching placebo, once every 4 weeks by SC injection up to Week 49. Receives: Drug: Placebo |
What is being measured
The primary outcome is the main question the study is designed to answer.
Percent Change From Baseline to Week 25 in Fasting Triglycerides (TG) Compared to Placebo
Measured: Baseline to Week 25
Secondary outcomes (9)
Percent Change From Baseline to Week 53 in Fasting TG Compared to Placebo
Measured: Baseline to Week 53
Proportion of Participants who Achieve Fasting TG <150 Milligrams per Deciliter (mg/dL) at Weeks 25 and 53 Compared to Placebo
Measured: Baseline, Weeks 25 and 53
Percent Change From Baseline to Weeks 25 and 53 in Fasting Apolipoprotein C-III (apoC-III) Compared to Placebo
Measured: Baseline 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 Placebo
Measured: Baseline to Weeks 25 and 53
Percent Change From Baseline to Weeks 25 and 53 in Fasting Remnant Cholesterol Compared to Placebo
Measured: Baseline 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 Placebo
Measured: Baseline to Weeks 25 and 53
Percent Change From Baseline to Weeks 25 and 53 in Fasting High-Density Lipoprotein-Cholesterol (HDL)-C Compared to Placebo
Measured: Baseline to Weeks 25 and 53
Percent Change From Baseline to Weeks 25 and 53 in Fasting Apolipoprotein B (apoB) Compared to Placebo
Measured: Baseline to Weeks 25 and 53
Percent Change From Baseline to Weeks 25 and 53 in Fasting Low-Density Lipoprotein-Cholesterol (LDL)-C Compared to Placebo
Measured: Baseline to Weeks 25 and 53
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted9 Nov 2022
- Study start21 Nov 2022
- Primary completion8 Aug 2024
- Study completion9 Jun 2025
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (3)Papers the sponsor has linked to this study.
- Other trials for HypertriglyceridemiaStudies of the same condition, open and under way.
- More trials run by Ionis Pharmaceuticals, Inc.The sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 3
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Quadruple blind
- Who is masked
- Participant, Care provider, Investigator, Outcomes assessor
- Enrolment
- 1,478 participants (actual)
Sponsor and investigators
- Lead sponsor
- Ionis Pharmaceuticals, Inc.
- Sponsor type
- Industry (pharma, biotech, devices)
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT05610280
- Sponsor's protocol ID
- ISIS 678354-CS9
- Other IDs
- 2022-501486-53
- Status last verified
- Feb 2026
- First submitted
- 2 Nov 2022
- Last updated
- 10 Feb 2026
- Results posted
- No
- Data monitoring committee
- Yes
- FDA-regulated drug
- Yes
- FDA-regulated device
- No
- Individual data sharing
- Yes: Ionis may share anonymized individual participant data, aggregated clinical data, and other types of data that support the results in this study. Data requests from qualified researchers will be considered once all three of the following criteria are met: (1) 12 months from marketing approval of the study drug in both the United States and European Union; (2) 18 months from conclusion of the study; and (3) 6 months from publication of study article. Access would be via a secure environment and is contingent upon approval of a research proposal and entry into an appropriate data use agreement. Requests to access data can be submitted via the website https://vivli.org/ourmember/ionis/.
- Expanded access
- Available
Publications
Marston NA, Bergmark BA, Prohaska TA, Moura FA, Zimerman A, Alexander VJ, Kang YM, Weinland J, Ran X, Murphy SA, Zhang S, Li D, Banach M, Stroes ESG, Kiss R, Gaudet D, Vrablik M, Goudev A, Bax JJ, Budoff MJ, Foldyna B, Lu MT, Tsimikas S, Giugliano RP, Sabatine MS. Effect of APOC3 Inhibition With Olezarsen on Coronary Atherosclerosis: Essence-TIMI 73b Imaging Study. Circulation. 2026 May 19;153(20):1539-1548. doi: 10.1161/CIRCULATIONAHA.126.080012. Epub 2026 Mar 30.
PubMed 41910513Bergmark BA, Marston NA, Prohaska TA, Alexander VJ, Zimerman A, Moura FA, Kang YM, Weinland J, Murphy SA, Goodrich EL, Zhang S, Li D, Banach M, Stroes E, Lu MT, Tsimikas S, Giugliano RP, Sabatine MS; Essence-TIMI 73b Investigators. Targeting APOC3 with Olezarsen in Moderate Hypertriglyceridemia. N Engl J Med. 2025 Oct 2;393(13):1279-1291. doi: 10.1056/NEJMoa2507227. Epub 2025 Aug 30.
PubMed 40888739Bergmark BA, Marston NA, Prohaska TA, Alexander VJ, Zimerman A, Moura FA, Kang YM, Murphy SA, Zhang S, Lu MT, Karwatowska-Prokopczuk E, Tsimikas S, Giugliano RP, Sabatine MS. Olezarsen in patients with hypertriglyceridemia at high cardiovascular risk: Rationale and design of the Essence-TIMI 73b trial. Am Heart J. 2025 Aug;286:116-124. doi: 10.1016/j.ahj.2025.02.022. Epub 2025 Mar 11.
PubMed 40081744
Study at a glance
From the registry record, last updated by the sponsor on 10 Feb 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- 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
- ClinicalTrials.gov ID
- NCT05610280
- Acronym / sponsor ID
- ISIS 678354-CS9
- Keywords
- ISIS 678354, Olezarsen
- Phase
- Phase 3
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 1,478 participants (actual)
- Lead sponsor
- Ionis Pharmaceuticals, Inc.Industry (pharma, biotech, devices)
- Study start
- 21 Nov 2022 (actual)
- Primary completion
- 8 Aug 2024 (actual)
- Study completion
- 9 Jun 2025 (actual)
- First posted
- 9 Nov 2022 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
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.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Quadruple blind (participant, care provider, investigator, outcomes assessor)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Olezarsen | Experimental | Drug: OlezarsenParticipants will be randomized to receive multiple doses of olezarsen, once every 4 weeks by subcutaneous (SC) injection up to Week 49. |
| Placebo | Placebo comparator | Drug: PlaceboParticipants will be randomized to receive olezarsen-matching placebo, once every 4 weeks by SC injection up to Week 49. |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (6 listed)
- Participants must fall into 1 of the following groups (a or b):
- Clinical diagnosis of atherosclerotic cardiovascular disease (ASCVD) or
- At increased risk for ASCVD
- 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.
Key exclusion criteria (5 listed)
- 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/Exclusion criteria may apply.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| OlezarsenAlso: ISIS 678354, AKCEA-APOCIII-LRxOlezarsen will be administered by SC injection. | Drug | Olezarsen |
| PlaceboOlezarsen-matching placebo will be administered by SC injection. | Drug | Placebo |
Primary outcome
Percent Change From Baseline to Week 25 in Fasting Triglycerides (TG) Compared to Placebo
Time frame: Baseline to Week 25
9 secondary outcomes
Percent Change From Baseline to Week 53 in Fasting TG Compared to Placebo
Time frame: Baseline to Week 53
Proportion of Participants who Achieve Fasting TG <150 Milligrams per Deciliter (mg/dL) at Weeks 25 and 53 Compared to Placebo
Time frame: Baseline, Weeks 25 and 53
Percent Change From Baseline to Weeks 25 and 53 in Fasting Apolipoprotein C-III (apoC-III) Compared to Placebo
Time frame: Baseline 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 Placebo
Time frame: Baseline to Weeks 25 and 53
Percent Change From Baseline to Weeks 25 and 53 in Fasting Remnant Cholesterol Compared to Placebo
Time frame: Baseline 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 Placebo
Time frame: Baseline to Weeks 25 and 53
Percent Change From Baseline to Weeks 25 and 53 in Fasting High-Density Lipoprotein-Cholesterol (HDL)-C Compared to Placebo
Time frame: Baseline to Weeks 25 and 53
Percent Change From Baseline to Weeks 25 and 53 in Fasting Apolipoprotein B (apoB) Compared to Placebo
Time frame: Baseline to Weeks 25 and 53
Percent Change From Baseline to Weeks 25 and 53 in Fasting Low-Density Lipoprotein-Cholesterol (LDL)-C Compared to Placebo
Time frame: Baseline to Weeks 25 and 53
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 10 Feb 2026.
- Derived from this study: PubMed 41910513Marston NA, Bergmark BA, Prohaska TA, Moura FA, Zimerman A, Alexander VJ, Kang YM, Weinland J, Ran X, Murphy SA, Zhang S, Li D, Banach M, Stroes ESG, Kiss R, Gaudet D, Vrablik M, Goudev A, Bax JJ, Budoff MJ, Foldyna B, Lu MT, Tsimikas S, Giugliano RP, Sabatine MS. Effect of APOC3 Inhibition With Olezarsen on Coronary Atherosclerosis: Essence-TIMI 73b Imaging Study. Circulation. 2026 May 19;153(20):1539-1548. doi: 10.1161/CIRCULATIONAHA.126.080012. Epub 2026 Mar 30.
- Derived from this study: PubMed 40888739Bergmark BA, Marston NA, Prohaska TA, Alexander VJ, Zimerman A, Moura FA, Kang YM, Weinland J, Murphy SA, Goodrich EL, Zhang S, Li D, Banach M, Stroes E, Lu MT, Tsimikas S, Giugliano RP, Sabatine MS; Essence-TIMI 73b Investigators. Targeting APOC3 with Olezarsen in Moderate Hypertriglyceridemia. N Engl J Med. 2025 Oct 2;393(13):1279-1291. doi: 10.1056/NEJMoa2507227. Epub 2025 Aug 30.
- Derived from this study: PubMed 40081744Bergmark BA, Marston NA, Prohaska TA, Alexander VJ, Zimerman A, Moura FA, Kang YM, Murphy SA, Zhang S, Lu MT, Karwatowska-Prokopczuk E, Tsimikas S, Giugliano RP, Sabatine MS. Olezarsen in patients with hypertriglyceridemia at high cardiovascular risk: Rationale and design of the Essence-TIMI 73b trial. Am Heart J. 2025 Aug;286:116-124. doi: 10.1016/j.ahj.2025.02.022. Epub 2025 Mar 11.
- Individual participant dataSharing planned: Yes. Ionis may share anonymized individual participant data, aggregated clinical data, and other types of data that support the results in this study. Data requests from qualified researchers will be considered once all three of the following criteria are met: (1) 12 months from marketing approval of the study drug in both the United States and European Union; (2) 18 months from conclusion of the study; and (3) 6 months from publication of study article. Access would be via a secure environment and is contingent upon approval of a research proposal and entry into an appropriate data use agreement. Requests to access data can be submitted via the website https://vivli.org/ourmember/ionis/.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
168 sites in 14 countries: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 3 study testing Olezarsen in people with Hypertriglyceridemia and Cardiovascular Diseases, run by Ionis Pharmaceuticals, Inc. at 168 sites in 14 countries.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 6 inclusion and 5 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 10 Feb 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 168 sites in United States, Netherlands, Canada, Poland, Bulgaria and 9 more countries. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 3 studies compare the treatment with the current standard treatment or a placebo in a large group, to confirm how well it works and watch for side effects.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Percent Change From Baseline to Week 25 in Fasting Triglycerides (TG) Compared to Placebo (time frame: Baseline to Week 25). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT05610280, which also lists 3 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 10 Feb 2026.