Severe HypertriglyceridemiaPhase 3NCT05079919
A Study of Olezarsen (ISIS 678354) Administered to Participants With Severe Hypertriglyceridemia
A Phase 3 study testing Olezarsen in people with Severe Hypertriglyceridemia, run by Ionis Pharmaceuticals, Inc. at 209 sites in 23 countries.
Trial summary
The purpose of the study is to evaluate the efficacy of olezarsen as compared to placebo on the percent change in fasting triglycerides (TG) from baseline. Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Severe Hypertriglyceridemia
- 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
- 617 participants
- Where
- 209 sitesin 23 countries
- Study dates
- 25 Oct 2021to 8 Jul 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
- Fasting TG ≥ 500 mg/dL (5.65 mmol/L) at Screening and Qualification
- Patients must be on lipid-lowering therapy that should adhere to standard of care (SOC) 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 > upper limit of normal unless due to Gilbert's syndrome
- Estimated GFR < 30 mL/min/1.73 m^2
Trial locations and contacts
209 sites in 23 countries.
209 sites in 23 countries
United States56 sites
University of Michigan Hospital and Health Systems/ Dept. of Pharmacy-Research Pharmacy
Ann Arbor, Michigan, 48109
Accel Research Sites Network
Birmingham, Alabama, 35216
Excel Medical Clinical Trials, LLC
Boca Raton, Florida, 33434
Modern Medicine
Brooklyn, New York, 11235
Velocity Clinical Research
Cedar Park, Texas, 78613
Novant Health Cancer Institute Elizabeth Investigational Drug Services
Charlotte, North Carolina, 28204
Chattanooga Research & Medicine, PLLC
Chattanooga, Tennessee, 37404
IMA Clinical Research Chicago
Chicago, Illinois, 60602
Southeast Clinical Research LLC
Chiefland, Florida, 32626
Velocity Clinical Research
Chula Vista, California, 91911
IACT Health
Columbus, Georgia, 31904
Aventiv Research
Columbus, Ohio, 43213
West Broadway Clinic
Council Bluffs, Iowa, 51501
University of Texas Southwestern
Dallas, Texas, 75390
Aa Mrc, Llc
Flint, Michigan, 48504
Northwell Health
Great Neck, New York, 11021
Cone Medical Center
Greensboro, North Carolina, 27401
Baylor College of Medicine
Houston, Texas, 77030
Diabetes/Lipid Management & Research Center
Huntington Beach, California, 92648
Westside Center for Clinical Research
Jacksonville, Florida, 32205
Kansas University Medical Center
Kansas City, Kansas, 66160
University of California, San Diego (UCSD)
La Jolla, California, 92037
Palm Research Center, INC.
Las Vegas, Nevada, 89148
Bryan Medical Center Clinical Research
Lincoln, Nebraska, 68506
LA Universal Research Center, Inc.
Los Angeles, California, 90057
Manassas Clinical Research Center
Manassas, Virginia, 20110
Velocity Clinical Research
Medford, Oregon, 97504
Finlay Medical Research
Miami, Florida, 33126
Circuit Clinical (Crystal Run Healthcare)
Middletown, New York, 10941
Innovia Research Center, INC
Miramar, Florida, 33027
Clinical Trials of America, LLC
Monroe, Louisiana, 71201
West Virginia University Heart and Vascular Institute
Morgantown, West Virginia, 26506
Clinical Trials of America, LLC
Mount Airy, North Carolina, 27030
Summit Research Group, LLC
Munroe Falls, Ohio, 44262
NYU Langone
New York, New York, 10016
Columbia University
New York, New York, 10032
Circuit Clinical
Niagara Falls, New York, 14304
York Clinical Research LLC
Norfolk, Virginia, 23510
Affinity Health
Oak Brook, Illinois, 60523
Ocala Cardiovascular Research
Ocala, Florida, 34471
Hightower Clinical Trial Services
Oklahoma City, Oklahoma, 73102
The Miriam Hospital
Providence, Rhode Island, 02906
Health Concepts
Rapid City, South Dakota, 57702
Wake Forest University Health Sciences
Salem, North Carolina, 27157
Mayo Clinic
Scottsdale, Arizona, 85259
Washington University School of Medicine
St Louis, Missouri, 63110
IMA Clinical Research
St Louis, Missouri, 63117
IMA Clinical Research
St. Petersburg, Florida, 33709
Medicus Alliance Clinical Research
Sugar Land, Texas, 77478
Modern Medical
Syosset, New York, 11791
VICIS Clinical Research
Tampa, Florida, 33614
America Clinical Trials
Tarzana, California, 91356
Continental Clinical Solutions
Towson, Maryland, 21204
Bayside Clinical Research
Trinity, Florida, 34655
Hudson County Clinical Trials Research Center
Union City, New Jersey, 07087
Velocity Clinical
West Jordan, Utah, 84088
Bulgaria17 sites
MHAT Blagoevgrad AD
Blagoevgrad, 2700
Medical Center Doctor Staykov EOOD
Burgas, 8008
Medical Center Diamedical 2013 OOD
Dimitrovgrad, 6400
MHAT "Dr. Tota Venkova" AD
Gabrovo, 5300
Medical Center "Hera" EOOD
Montana, 3400
SHAT "Special Medic" Ltd
Plovdiv, 4000
Medical Center Rusemed EOOD
Rousse, 7000
DCC 1 Sliven
Sliven, 8800
Gabriela Zhelyazkova
Sliven, 8800
Medical Center Smolyan Clinical Research OOD
Smolyan, 4700
Medical Center Endomedical EOOD
Sofia, 1606
Medical Centar "KALIMAT"
Sofia, 1680
MC Doctor Kalchev OOD
Sofia, 1700
UMHAT Sofiamed OOD
Sofia, 1797
New Rehabilitation Center
Stara Zagora, 6000
UMHAT Prof. Dr. Stoyan Kirkovich AD, Clinic of Cardiology
Stara Zagora, 6000
Medical Centre Nevromedics EOOD
Veliko Tarnovo, 5006
United Kingdom16 sites
Waterloo Medical Centre
Blackpool, FY4 3AD
Lakeside Healthcare at Corby
Corby, Northamptonshire, NN172UR
Mounts Bay Medical Hub
Cornwell, TR27 5DT
Panthera
Glasgow, G51 4TY
Hull Royal Infirmary
Hull, HU3 2JZ
Huddersfield Royal Infirmary
Lindley, Huddersfield, HD3 3EA
Oak Tree Surgery and Pensilva Health Centre
Liskeard, Cornwall, PL14 3XA
Panthera
London, EN3 4GS
Sandwell General Hospital
Lyne, West Bromwich, B71 4HJ
Manchester University NHS Foundation Trust (MFT)
Manchester, M13 9WL
Newquay Health Centre
Newquay, Cornwall, TR7 1RU
Upton Surgery
Poole, Dorset, BH16 5PW
Panthera
Preston, PR2 9QB
Panthera Biopartners
Rochdale, England, OL11 4AU
Panthera Biopartners
Sheffield, England, S2 5FX
Primary Care Sheffield
Sheffield, S94EU
Hungary11 sites
CRU Hungary Kft
Borsod, 3860
Észak-Pesti Centrumkórház - Honvédkórház; II. Belgyógyászati Osztály
Budapest, H-1062
Semmelweis Egyetem Kardiológiai Rehabilitacio
Budapest, H-1085
Belinus BT
Debrecen, 4025
Debreceni Egyetem Klinikai Kozpont Belgyogyaszat A epulet
Debrecen, 4032
BKS Research Kft
Hatvan, Heves County, 3000
IPR Hungary Kft.
Miskolc, H-3530
Medifarma 98 Kft
Nyíregyháza, Szabolcs-Szatmár-Bereg, 4400
Borbanya Praxis Eü KFT
Nyíregyháza, 4405
Fejer Megyei Szent Gyorgy Egyetemi Oktato Korhaz
Székesfehérvár, 8000
DRC Gyogyszervizsgalo Kozpont Kft
Veszprém, 8230
Spain10 sites
Hospital Abente y Lago
A Coruña, 15001
Hospital de la Santa Creu i de Sant Pau
Barcelona, 08041
Hospital Clinic Barcelona
Barcelona, 8063
Institut d'Investigació i Innovació Parc Taulí (I3PT) Departament Medicina Universitat
Barcelona, 8208
Hospital Universitari de Bellvitge
Barcelona, 8907
Hospital Universitario Reina Sofia
Córdoba, 14004
Clinica Universidad de Navarra
Madrid, 28027
Hospital Universitario
Madrid, 28041
Hospital Virgen del Rocio Edificio Centro de Diagnostico y Tratamiento (CDT)
Seville, 41013
Hospital Universitari Sant Joan de Reus.
Tarragona, 43204
Germany9 sites
Stoffwechselcentrum Charite Campus Virchow
Berlin, 13353
Uniklinik Köln
Cologne, 50937
Universitaetsklinikum Carl Gustav Carus an der TU Dresden
Dresden, 1307
Klinische Forschung Hamburg GmbH
Hamburg, 20253
Klinische Forschung Hannover-Mitte GmbH
Hanover, 30159
St. Josefskrankenhaus,
Heidelberg, 69115
Praxis Dr. med. Taggeselle
Markkleeberg, 04416
Kardiologische Praxis in Papenburg
Papenburg, 26871
Evangelisches Krankenhaus Witten
Witten, 58455
Israel9 sites
SOROKA Medical Center
Beersheba, 8410101
Bnai Zion Medical Center
Haifa, 3339416
Lady Davis Carmel Medical Center
Haifa, 3436212
Shaare Zedek Medical Center
Jerusalem, 9103102
Hadassah Hebrew University Ein Kerm MC
Jerusalem, 91120
Rabin Medical Center
Petah Tikva, 4941492
Kaplan Medical Center
Rehovot, 7661041
Sourasky Medical Center
Tel Aviv, 6423909
Sheba Medical Center
Tel HaShomer, 5265601
Czechia8 sites
MEDICUS SERVICES s.r.o.
Brandýs nad Labem, 250 01
EDUMED s.r.o.
Hradec Králové, 500 02
Fakultní nemocnice Hradec Králové
Hradec Králové, 500-05
EDUMED s.r.o.
Náchod, 547 01
Fakultni nemocnice Ostrava
Ostrava, 70852
Vseobecna fakultni nemocnice
Prague, 128 08
Lekarna Poliklinika Hurka
Prague, 15800
Interni Ambulance
Uherské Hradiště, 686 01
Denmark7 sites
Aalborg University Hospital
Aalborg, 9000
Aarhus University Hospital
Aarhus, 8200
Esbjerg Hospital
Esbjerg, 6700
Bispebjerg Hospital
Frederiksberg, 2000
Herlev Hospital
Herlev, 2730
Godstrup Regional Hospital
Herning, 7400
Regionshospitalet Viborg
Viborg, 8800
Italy7 sites
IRCCS Azienda Ospedaliero Universitaria di Bologna Policlinico di SantOrsola
Bologna, 40138
Ospdale E. Bassini
Milan, 20092
ASST Grande Ospedale Metropolitano Niguarda
Milan, 20162
Azienda Ospedaliera Universitaria Federico II
Naples, 80131
A.O. Policlinico Universitario P. Giaccone
Palermo, 90127
Policlinico Umberto
Roma, 00161
Fondazione Policlinico Universitario A. Gemelli IRCCS - Universita Cattolica del Sacro Cuore
Roma, 00168
Netherlands7 sites
Academic Medical Center - Department of Vascular Medicine
Amsterdam, 1105 AZ
Rijnstate Arnhem
Arnhem, 6815 AD
Albert Schweitzer ziekenhuis
Dordrecht, 3318 AT
Ziekenhuis Gelderse Vallei
Ede, 6716 RP
Radboud UMC
Nijmegen, 6525 GA
Erasmus MC
Rotterdam, 3015 GD
Universitair Medisch Centrum Utrecht
Utrecht, 3584 CX
Australia6 sites
Royal Adelaide Hospital
Adelaide, 5000
Royal Prince Alfred Hospital
Camperdown, New South Wales, 2050
Monash Medical Centre
Clayton S., Victoria, 3168
The Alfred Hospital
Melbourne, Victoria, 3004
Royal North Shoe Hospital
Saint Leonards, New South Wales, 2065
Dr. Heart Pty Ltd at Cholesterol Care Australia
Woolloongabba, Queensland, 4102
France6 sites
Hôpital Louis Pradel
Bron, 69677
CHU Dijon Bourgogne
Dijon, 21079
Hopital de la Conception
Marseille, 13005
CHU Montpellier - Hôpital Lapeyronie
Montpellier, 34295
Hopital Pitie Salpetriere APHP
Paris, 75013
CHU Nantes - Hopital Nord Laennec
Saint-Herblain, 44093
Poland6 sites
Salvia
Katowice, 40-772
Instytut Centrum Zdrowia Matki Polki Klinika
Łódz, 93-338
Praktyka Lekarska Ewa Krzyzagorska
Poznan, 61-655
ClinMedica Research Sp.z o.o.
Skierniewice, 96-100
Osrodek Badan Klinicznych Metabolica
Tarnów, 33-100
Futuremeds sp. z o.o
Wroclaw, 50-088
Slovakia6 sites
Medispektrum s.r.o., diabetologicka a metabolicka ambulancia
Bratislava, 851 01
Nemocnica s poliklinikou Brezno
Brezno, 97701
Human-Care s.r.o.
Košice, 040 01
Vychodoslovensky Ustav srdcovych a cievnych chorob a.s.
Košice, 040 11
Cardio D&R
Košice, 040 22
Nemocnica arm. generala L. Svobodu Svidnik,
Svidník, 089 01
South Africa6 sites
Iatros International
Bloemfontein, Free State, 9301
Dr Jan Engelbrecht and Ass. Inc
Cape Town, Western Cape, 7130
University of Cape town - Lipid Factory
Cape Town, 7925
Unitas Hospital
Centurion, Gauteng, 157
Chatsmed Garden Hospital
Chatsworth, 4092
TREAD Research - Department of Cardiology
Parow, Western Cape, 7500
Canada5 sites
Ecogene-21
Chicoutimi, Quebec, G7H 7K9
Institut de recherches cliniques de Montréal (IRCM)
Montreal, Quebec, H2W 1R7
Clinique des Maladies Lipidiques de Quebec Inc.
Québec, Quebec, G1V 4W2
Canadian Phase Onward Inc
Toronto, Ontario, M3J 0K2
Arc Biosystems
Vancouver, British Columbia, V6Z 2C7
Portugal5 sites
Centro Hospitalar do Baixo Vouga Hospital Infante D. Pedro
Aveiro, 3814-501
Centro Hospitalar e Universitário de Coimbra, EPE
Coimbra, 3004-561
Hospital Egas Moniz - Centro Hospitalar de Lisboa Ocidental
Lisbon, 1349-019
Centro Hospitalar Universitário de São João Consultas Externas de Endocrinologia K13
Porto, 4200-319
Centro Hospitalar
Vila Nova de Gaia, 4434-502
Turkey (Türkiye)4 sites
Hacettepe University Medical Faculty
Ankara, 06230
Ege University School of Medicine, Department of Cardiology
Izmir, 35100
Kocaeli University Faculty of Medicine
Kocaeli, 41380
Necmettin Erbakan University Meram Medical Faculty
Konya, 42280
New Zealand3 sites
New Zealand Clinical Research
Christchurch, 8011
Auckland City Hospital
Grafton, Auckland, 1010
Wellington Regional Hospital
Newtown, 6021
Finland2 sites
Turku University Hospital
Turku, 20520
Ylitornio Health Care Center
Ylitornio, 95600
Sweden2 sites
Sahlgrenska, University Hospital
Gothenburg, Västra Götaland County, 413 45
Karolinska University Hospital Huddinge
Stockholm, 14186
About this study
Official title: A Randomized, Double-Blind, Placebo-Controlled, Phase 3 Study of ISIS 678354 Administered Subcutaneously to Patients With Severe Hypertriglyceridemia
The purpose of the study is to evaluate the efficacy of olezarsen as compared to placebo on the percent change in fasting triglycerides (TG) from baseline.
Read the detailed description
This is a multi-center, randomized, double-blind, placebo-controlled study in 617 participants. Participants will be randomized to receive olezarsen or placebo in a 53-week treatment period. The length of participation in the study will be approximately 78 weeks, which includes an up to 12-week screening period, a 53-week treatment period, and a 13-week post-treatment evaluation period or transition to open-label extension (OLE) study with up to 1-year treatment.
- Conditions
- Severe Hypertriglyceridemia
- Being tested
- Olezarsen, Placebo
- Keywords
- ISIS 678354, Fasting Triglycerides, Apolipoprotein C-III, Very Low-Density Lipoprotein Cholesterol, High-Density Lipoprotein-Cholesterol, Non-High-Density Lipoprotein-Cholesterol, Olezarsen
- Medical subject headings
- Hypertriglyceridemia
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
OlezarsenDrug
Also called AKCEA-APOCIII-LRx, ISIS 678354
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 | Olezarsen will be administered once every 4 weeks by subcutaneous (SC) injection from Week 1 through Week 49. Receives: Drug: Olezarsen |
| Placebo | Placebo comparator | Olezarsen-matching placebo will be administered once every 4 weeks by SC injection from Week 1 through 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 in Fasting TG Compared to Placebo
Measured: Baseline and Month 6
Secondary outcomes (6)
Percent Change from Baseline in Fasting TG Compared to Placebo
Measured: Baseline and Month 12
Percent Change from Baseline in Fasting Apolipoprotein C-III (ApoC-III), Remnant Cholesterol and Fasting Non-High-Density Lipoprotein-Cholesterol (Non-HDL-C) Compared to Placebo
Measured: Baseline, Month 6 and 12
Proportion of Patients Who Achieve Fasting TG <500 mg/dL (5.65 mmol/L) Compared to Placebo
Measured: Month 12
Proportion of Participants Who Achieve Fasting TG < 880 mg/dL (10 mmol/L) Compared to Placebo in the Subgroup of Participants with Baseline TG ≥ 880 mg/dL
Measured: Month 12
Adjudicated Acute Pancreatitis Event Rate During the Treatment Period Compared to Placebo
Measured: Week 1 through Week 53
Absolute Change in Hepatic Fat Fraction (HFF) Between Olezarsen Treatment Group and Pooled Placebo
Measured: Baseline through Month 12
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted15 Oct 2021
- Study start25 Oct 2021
- Primary completion22 Oct 2024
- Study completion8 Jul 2025
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (2)Papers the sponsor has linked to this study.
- Other trials for Severe 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
- Triple blind
- Who is masked
- Participant, Care provider, Investigator
- Enrolment
- 617 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
- NCT05079919
- Sponsor's protocol ID
- ISIS 678354-CS5
- Other IDs
- 2021-002192-19, 2024-510696-38-00
- Status last verified
- Feb 2026
- First submitted
- 4 Oct 2021
- Last updated
- 10 Feb 2026
- Results posted
- No
- Data monitoring committee
- No
- 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, Alexander VJ, Prohaska TA, Kang YM, Moura FA, Zimerman A, Waldman E, Weinland J, Murphy SA, Goodrich EL, Zhang S, Xia S, Li D, Goldberg AC, Goudev A, Badimon L, Kiss RG, Vrablik M, Gaudet D, Moulin P, Stroes ESG, Banach M, Cohen H, Blom D, Charng MJ, Nordestgaard BG, Nicholls SJ, Tsimikas S, Giugliano RP, Sabatine MS; CORE-TIMI 72a and CORE2-TIMI 72b Investigators. Olezarsen for Managing Severe Hypertriglyceridemia and Pancreatitis Risk. N Engl J Med. 2026 Jan 29;394(5):429-441. doi: 10.1056/NEJMoa2512761. Epub 2025 Nov 8.
PubMed 41211918Marston NA, Bergmark BA, Alexander VJ, Karwatowska-Prokopczuk E, Kang YM, Moura FA, Prohaska TA, Zimerman A, Zhang S, Murphy SA, Tsimikas S, Giugliano RP, Sabatine MS. Design and rationale of the CORE-TIMI 72a and CORE2-TIMI 72b trials of olezarsen in patients with severe hypertriglyceridemia. Am Heart J. 2025 Aug;286:125-135. doi: 10.1016/j.ahj.2025.03.003. Epub 2025 Mar 9.
PubMed 40064331
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 ISIS 678354 Administered Subcutaneously to Patients With Severe Hypertriglyceridemia
- ClinicalTrials.gov ID
- NCT05079919
- Acronym / sponsor ID
- ISIS 678354-CS5
- Conditions
- Severe Hypertriglyceridemia
- Keywords
- ISIS 678354, Fasting Triglycerides, Apolipoprotein C-III, Very Low-Density Lipoprotein Cholesterol, High-Density Lipoprotein-Cholesterol, Non-High-Density Lipoprotein-Cholesterol, Olezarsen
- Phase
- Phase 3
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 617 participants (actual)
- Lead sponsor
- Ionis Pharmaceuticals, Inc.Industry (pharma, biotech, devices)
- Study start
- 25 Oct 2021 (actual)
- Primary completion
- 22 Oct 2024 (actual)
- Study completion
- 8 Jul 2025 (actual)
- First posted
- 15 Oct 2021 (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 efficacy of olezarsen as compared to placebo on the percent change in fasting triglycerides (TG) from baseline.
Detailed description
This is a multi-center, randomized, double-blind, placebo-controlled study in 617 participants. Participants will be randomized to receive olezarsen or placebo in a 53-week treatment period. The length of participation in the study will be approximately 78 weeks, which includes an up to 12-week screening period, a 53-week treatment period, and a 13-week post-treatment evaluation period or transition to open-label extension (OLE) study with up to 1-year treatment.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Triple blind (participant, care provider, investigator)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Olezarsen | Experimental | Drug: OlezarsenOlezarsen will be administered once every 4 weeks by subcutaneous (SC) injection from Week 1 through Week 49. |
| Placebo | Placebo comparator | Drug: PlaceboOlezarsen-matching placebo will be administered once every 4 weeks by SC injection from Week 1 through Week 49. |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (2 listed)
- Fasting TG ≥ 500 mg/dL (5.65 mmol/L) at Screening and Qualification
- Patients must be on lipid-lowering therapy that should adhere to standard of care (SOC) 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 (4 listed)
- Hemoglobin A1c (HbA1c) ≥ 9.5% at Screening
- Alanine aminotransferase or aspartate aminotransferase > 3.0 × upper limit of normal
- Total bilirubin > upper limit of normal unless due to Gilbert's syndrome
- Estimated GFR < 30 mL/min/1.73 m^2
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: AKCEA-APOCIII-LRx, ISIS 678354Olezarsen 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 in Fasting TG Compared to Placebo
Time frame: Baseline and Month 6
6 secondary outcomes
Percent Change from Baseline in Fasting TG Compared to Placebo
Time frame: Baseline and Month 12
Percent Change from Baseline in Fasting Apolipoprotein C-III (ApoC-III), Remnant Cholesterol and Fasting Non-High-Density Lipoprotein-Cholesterol (Non-HDL-C) Compared to Placebo
Time frame: Baseline, Month 6 and 12
Proportion of Patients Who Achieve Fasting TG <500 mg/dL (5.65 mmol/L) Compared to Placebo
Time frame: Month 12
Proportion of Participants Who Achieve Fasting TG < 880 mg/dL (10 mmol/L) Compared to Placebo in the Subgroup of Participants with Baseline TG ≥ 880 mg/dL
Time frame: Month 12
Adjudicated Acute Pancreatitis Event Rate During the Treatment Period Compared to Placebo
Time frame: Week 1 through Week 53
Absolute Change in Hepatic Fat Fraction (HFF) Between Olezarsen Treatment Group and Pooled Placebo
Time frame: Baseline through Month 12
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 41211918Marston NA, Bergmark BA, Alexander VJ, Prohaska TA, Kang YM, Moura FA, Zimerman A, Waldman E, Weinland J, Murphy SA, Goodrich EL, Zhang S, Xia S, Li D, Goldberg AC, Goudev A, Badimon L, Kiss RG, Vrablik M, Gaudet D, Moulin P, Stroes ESG, Banach M, Cohen H, Blom D, Charng MJ, Nordestgaard BG, Nicholls SJ, Tsimikas S, Giugliano RP, Sabatine MS; CORE-TIMI 72a and CORE2-TIMI 72b Investigators. Olezarsen for Managing Severe Hypertriglyceridemia and Pancreatitis Risk. N Engl J Med. 2026 Jan 29;394(5):429-441. doi: 10.1056/NEJMoa2512761. Epub 2025 Nov 8.
- Derived from this study: PubMed 40064331Marston NA, Bergmark BA, Alexander VJ, Karwatowska-Prokopczuk E, Kang YM, Moura FA, Prohaska TA, Zimerman A, Zhang S, Murphy SA, Tsimikas S, Giugliano RP, Sabatine MS. Design and rationale of the CORE-TIMI 72a and CORE2-TIMI 72b trials of olezarsen in patients with severe hypertriglyceridemia. Am Heart J. 2025 Aug;286:125-135. doi: 10.1016/j.ahj.2025.03.003. Epub 2025 Mar 9.
- 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.
209 sites in 23 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 Severe Hypertriglyceridemia, run by Ionis Pharmaceuticals, Inc. at 209 sites in 23 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 2 inclusion and 4 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 209 sites in United States, Bulgaria, United Kingdom, Hungary, Spain and 18 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 in Fasting TG Compared to Placebo (time frame: Baseline and Month 6). 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 NCT05079919, which also lists 2 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.