Severe HypertriglyceridemiaPhase 3NCT05552326
A Study of Olezarsen Administered Subcutaneously to Participants With Severe Hypertriglyceridemia
A Phase 3 study testing Olezarsen in people with Severe Hypertriglyceridemia, run by Ionis Pharmaceuticals, Inc. at 205 sites in 23 countries.
Trial summary
The purpose of this 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
- 446 participants
- Where
- 205 sitesin 23 countries
- Study dates
- 31 Aug 2022to 12 Sep 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
- Participants 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.
- Participants must be willing to comply with diet and lifestyle recommendations as able.
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 ULN unless due to Gilbert's syndrome
- Estimated GFR < 30 mL/min/1.73 m^2
Trial locations and contacts
205 sites in 23 countries.
205 sites in 23 countries
United States63 sites
Emory University
Atlanta, Georgia, 30322
University of Maryland School of Medicine
Baltimore, Maryland, 21201
Maryland Cardiovascular Specialists
Baltimore, Maryland, 21229
Central Research Associates, Inc.
Birmingham, Alabama, 35205
Alabama Clinical Therapeutics, LLC Alabaster
Birmingham, Alabama, 35235
Grace Research, LLC
Bossier City, Louisiana, 71111
Massachusetts General Hospital
Boston, Massachusetts, 02114
St. Vincent Medical Group
Carmel, Indiana, 46290
Medical University of South Carolina (MUSC)
Charleston, South Carolina, 29425
The Ohio State University (OSU)
Columbus, Ohio, 43203
Accel Research Sites
DeLand, Florida, 32720
Accel Clinical Research
Eatonton, Georgia, 31024
Onyx Clinical Research
Flint, Michigan, 48532
Texas Health Family Care
Fort Worth, Texas, 76107
Northeast Georgia Medical Center
Gainesville, Georgia, 30501
Finlay Medical Research
Greenacres City, Florida, 33467
Vilo Research Group
Houston, Texas, 77017
Juno Research
Houston, Texas, 77040
Juno Research
Houston, Texas, 77054
Clinical Trial Network
Houston, Texas, 77074
Pioneer Research Solutions, Inc
Houston, Texas, 77099
The Jackson Clinic
Jackson, Tennessee, 38305
University of Florida Jacksonville
Jacksonville, Florida, 32209
University of Kansas Medical Center (KUMC)
Kansas City, Kansas, 66160
Clinical Investigation Specialists Inc.
Kenosha, Wisconsin, 53144
Sante Clinical Research, LLC
Kerrville, Texas, 78028
FMC Science
Lampasas, Texas, 76550
Clinical Trials of America, LLC
Lenoir, North Carolina, 28645
The Research Group of Lexington, LLC
Lexington, Kentucky, 40503
Main Street Physicians Care Waterway
Little River, South Carolina, 29566
NRC Research Institute
Los Angeles, California, 90015
University of Louisville
Louisville, Kentucky, 40202
Louisville Metabolic and Atherosclerosis Research Center (L-MARC)
Louisville, Kentucky, 40213
Meridien Research
Maitland, Florida, 32751
SV Research LLC
Marion, Ohio, 43302
DCT - McAllen Primary Care, LLC
McAllen, Texas, 78503
Texas Institute of Cardiology
McKinney, Texas, 75071
SMS Clinical Research, LLC
Mesquite, Texas, 75149
Southern Endocrinology Associates
Mesquite, Texas, 75149
Columbus Clinical Services
Miami, Florida, 33125
NYU Langone Hospital - Long Island
Mineola, New York, 11501
Clinical Trials of America LA, LLC
Monroe, Louisiana, 71201
Diabetes and Endocrinology Consultants, P.C.
Morehead City, North Carolina, 28557
Randomize Now
Newnan, Georgia, 30265
Harmony Clinical Research, Inc
North Miami Beach, Florida, 33162
Permian Research Foundation
Odessa, Texas, 79761
Orchard Park Family Practice
Orchard Park, New York, 14127
Aspen Clinical Research
Orem, Utah, 84058
Combined Research Orlando Phase I-IV
Orlando, Florida, 32807
Onyx Clinical Research
Peoria, Arizona, 85381
University of Pennsylvania
Philadelphia, Pennsylvania, 19104
Monument Health Clinical Research
Rapid City, South Dakota, 57701
Onyx Clinical Research
Rochester Hills, Michigan, 48307
Ogden Clinic Grandview
Roy, Utah, 84401
OnSite Clinical Solutions, LLC
Salisbury, North Carolina, 28144
Diabetes & Glandular Disease Clinic, P.A.
San Antonio, Texas, 78229
Stern Cardiovascular
Southaven, Mississippi, 38671
3Sync Research
Sunrise, Florida, 33325
R & B Medical Center LLC
Tampa, Florida, 33614
JSV Clinical Research Study, Inc.
Tampa, Florida, 33634
Oklahoma Heart Institute
Tulsa, Oklahoma, 74133
Tranquil Research
Webster, Texas, 77598
Metabolic Research Institute
West Palm Beach, Florida, 33401
Bulgaria16 sites
Medical Center Diamedical EOOD
Dimitrovgrad, 6400
MHAT Haskovo AD
Haskovo, 6304
MHAT Pazardzhik AD
Pazardzhik, 4400
UMHAT - Kaspela EOOD
Plovdiv, 4000
University Multiprofile Hospital for Active Treatment Pulmed OOD
Plovdiv, 4000
UMHAT Kanev AD
Rousse, 7002
MHAT Sliven to MMA Sofia
Sliven, 8800
Medical Center Smolyan Clinical Research OOD
Smolyan, 4700
Medical Center for Specialized Medical Help in Cardiovascular Diseases OOD
Sofia, 1000
Acibadem City Clinic Tokuda University Hospital
Sofia, 1407
Medico Dental Center ISUL Tsaritsa Yoanna EOOD
Sofia, 1527
Medical Centre Synexus Sofia EOOD
Sofia, 1784
Medical Center Zara - Med
Stara Zagora, 6000
DCC Equita
Varna, 9000
Specialized Hospital for Active Treatment of Cardiology
Varna, 9000
Medical Centre "Nevromedics" EOOD
Veliko Tarnovo, 5006
Poland11 sites
UCK, I Klinika Kardiologii
Gdansk, 80-214
Biokinetica
Józefów, 05-410
Centrum Medyczne Pratia
Katowice, 40-081
Centra Medyczne Medyceusz
Lodz, 91-053
Clinical Best Solutions
Lublin, 20-078
Etg Lublin
Lublin, 20-412
Centrum Zdrowia Metabolicznego
Poznan, 60-589
Clinical Best Solutions Sp. Z.o.o Spolka Komandytowa
Warsaw, 00-710
Centrum Medycnze AMED
Warsaw, 03-291
Narodowy Instytut Kardiologii im. S. Wyszyńskiego - PIB
Warsaw, 04-628
ETG Zamosc / Pro Life Medica Sp. z o.o.
Zamość, 22-400
Spain11 sites
Hospital Germans Trias i Pujol
Badalona, 8916
Hospital Vall d'Hebron
Barcelona, 8035
Hospital Comarcal Infanta Elena
Huelva, 21007
Hospital Universitario de Jaen
Jaén, 23007
Hospital Universitario 12 de Octubre
Madrid, 28041
Hospital Regional de Malaga
Málaga, 29009
Unidad de Ensayos Clinicos
Málaga, 29010
Hospital Provincial de Conxo
Santiago de Compostela, 15706
Hospital Universitario Virgen Macarena
Seville, 41009
Hospital Clinico Universitario de Valencia
Valencia, 46010
Hospital Universitario Miguel Servet
Zaragoza, 50009
India10 sites
Sri Jayadeva Institute of Cardiovascular Sciences and Research
Bengaluru, 560069
Sir Ganga Ram Hospital
Delhi, 110060
Eternal Hospital
Jaipur, 302017
B. M. Birla Heart Research Centre A Unit of the Calcutta Medical Research Institute
Kolkata, West Bengal, 700027
IPGMER
Kolkata, 700020
Vinaya Hospital and Research Centre (A Unit of Karnataka Institute of Medical Sciences)
Mangaluru, 575003
KEM Hospital
Mumbai, 4000012
Bhatia Hospital
Mumbai, 400007
Manipal Hospital Mysore
Mysore, 570015
Max Super Specialty Hospital
New Delhi, National Capital Territory of Delhi, 110017
Brazil9 sites
NUPEC - Nucleo de Pesquisa Clinica
Belo Horizonte, 30220-140
Núcleo de Pesquisa Clínica
Curitiba, 80730-150
Hospital Universitario Walter Cantidio - UFC
Fortaleza, 60430-270
Nucleo de Pesquisa em Cirurgia Vascular
Porto Alegre, 90035-903
IBPClin Pesquisa Clinica
Rio de Janeiro, 20241-180
CPQuali Pesquisa Clinica
São Paulo, 01228-000
Instituto do Coração - HCFMUSP
São Paulo, 05403-000
Hospital das Clinicas da Faculdade de Medicina da Universidade de Sao Paulo - FMUSP
São Paulo, 05403-900
i9 Pesquisas Clínicas/Loema - Instituto de Pesquisas Clínica & Consultores
São Paulo, 13092-133
Argentina8 sites
CIPREC - Centro de Investigación y Prevención Cardiovascular
Buenos Aires, C1061AAG
Fundacion Favaloro
Buenos Aires, C1093AAS
Centro Médico Dra. Laura Maffei
Buenos Aires, C1425AGC
Glenny Corp SA
Buenos Aires, C1430
Instituto Médico DAMIC
Córdoba, X5003DCE
Instituto de Cardiología Corrientes
Corrientes, W3400CDS
Centro Medico San Luis
San Luis, D5700
Clínica FUSAVIM Privada
Villa María, X5900JKA
Netherlands7 sites
Vumc Amsterdam Medical Center
Amsterdam, 1081BT
Gelre Ziekenhuizen Apeldoorn
Apeldoorn, 7334 DZ
Reinier de Graaf Ziekenhuis
Delft, 2625 AD
Het Van Weel Bethesda ziekenhuis
Dirksland, 3247BW
Albert Schweitzer Ziekenhuis
Dordrecht, 3318 AT
Bethesda Diabetes Research Center
Hoogeveen, 7909 AA
Canisius-Wilhelmina Ziekenhuis (CWZ)
Nijmegen, 6532 SZ
Romania7 sites
Cabinet Medical Individual SC DIANA BARBONTA SRL
Alba, 510053
Cardioplus Center SRL
Baia Mare, 430123
Centrul Medical de Diagnostic si Tratament Ambulatoriu Neomed S.R.L
Brasov, 500283
Centrul Medical Medicover Victoria
Bucharest, 10626
S.C. SAL MED S.R.L., Cardiologie
Piteşti, 10437
Cardio Med SRL
Târgu Mureş, 540124
S.C. Mediab Srl
Târgu Mureş, 540142
Canada6 sites
Aggarwal and Associates Ltd.
Brampton, Ontario, L6T 0G1
Joanne F. Liutkus Medicine Professional Corporation
Cambridge, Ontario, N3H 4L5
Unite de Recherche Clinique
Saint-Jérôme, Quebec, J7Z 2V4
Bluewater Clinical Research Group
Sarnia, Ontario, N7t 4X3
NL Health Services
St. John's, Newfoundland and Labrador, A1B 3V6
Toronto General Hospital
Toronto, Ontario, M5G2C4
Czechia6 sites
CTC Hodonin s.r.o.
Hodonín, 695 01
KardioBusak s.r.o.
Louny, 440 01
Fakultni nemocnice v Motole
Prague, 150 06
Endokrinologie Cerny Most s.r.o.
Prague, 198 00
Diabetologická a endokrinologická ambulance Milan Kvapil
Příbram, 267 01
AeskuLab k.s
Teplice, 415 01
Hungary6 sites
Lausmed Kft.
Baja, H-6500
DRC Gyogyszervizsgalo Kozpont Kft
Balatonfüred, H-8230
Obudai Egeszsegugyi Centrum
Budapest, H-1036
Clinexpert Kft.
Budapest, H1033
Pharma4 Trial Kft.
Gyöngyös, H-3200
Somogy Varmegyei Kaposi Mor Oktato Korhaz Diabetologiai szakrendeles
Kaposvár, H-7400
Slovakia6 sites
Alian s.r.o.
Bardejov, 08501
Ambulancia diabetologicka a poruch latkovej premeny a vyzivy
Bratislava, 83106
Interna a diabetologicka ambulancia - IN-DIA s.r.o.
Lučenec, 98401
Diab sro
Rožňava, 04801
Interna SK, s.r.o.
Svidník, 08901
Areteus s.r.o
Trebišov, 07501
Taiwan6 sites
Kaohsiung Medical University Chung-Ho Memorial Hospital (KMUH)
Kaohsiung City, 80756
Mackay Memorial Hospital
New Taipei City, 251404
Taichung Veterans General Hospital
Taichung, 40705
National Cheng Kung University Hospital
Tainan, 704017
Shin Kong Wu Ho-Su Memorial Hospital
Taipei, 111045
Chang Gung Medical Foundation - Linkou Branch
Taoyuan, 33305
Greece5 sites
University General Hospital of Alexandroupoli
Alexandroupoli, 68100
AHEPA Building of Evaggelismos
Athens, 10676
University General Hospital ATTIKON
Athens, 12462
Hygeia Hospital
Athens, 15123
AHEPA University General Hospital of Thessaloniki
Thessaloniki, 54636
Lithuania5 sites
Saules seimons medicinos centras
Kaunas, 49449
Klinikiniai sprendimai
Kaunas, LT-49387
Clinic of Cardiology and Rehabilitation
Klaipėda, LT-91131
Republican Panevezys Hospital
Panevezys, LT-35144
Pirmoji viltis
Šiauliai, LT-76206
Mexico5 sites
Centro de Investigación Cardiométabolica de Aguascalientes S.A. de C.V.
Aguascalientes, 20230
Cientia Investigacion Clinica Sc
Chihuahua City, 32103
Medical Care and Research S.A de C.V.
Mérida, Yucatán, 97070
Clinstile, S.A. de C.V.
Mexico City, 06700
Clinical Research Institute S.C.
Tlanepantla, 54055
Belgium4 sites
AZ Sint-Jan Brugge
Bruges, 8000
Hôpital Erasme
Brussels, 1070
Virga Jessa Hospital
Hasselt, 3500
UZ Leuven
Leuven, 3000
Italy4 sites
Azienda Socio Sanitaria Territoriale Papa Giovanni XXIII
Bergamo, 24127
AORN S. Anna e S. Sebastiano UOC FARMACIA
Caserta, 81100
Azienda Ospedaliero-Universitaria di Ferrara-Arcispedale Sant'Anna
Cona, 44124
Fondazione I.R.C.C.S. Policlinico "San Matteo" c/o C.U.R.M.
Pavia, 27100
Malaysia4 sites
Sultanah Bahiyah Hospital
Alor Star, Kedah, 05460
Pulau Pinang Hospital
George Town, Pulau Pinang, 10450
University Malaya Medical Centre (UMMC)
Kuala Lumpur, 59100
Hospital Taiping
Taiping, Perak, 34000
France3 sites
Hopital de Hautepierre
Strasbourg, 67098
ELSAN - Polyclinique Vauban
Valenciennes, 59300
GHM les Portes du Sud
Vénissieux, 69200
Portugal2 sites
Hospital CUF Tejo
Lisbon, 1350-352
Centro Hospitalar de Entre Douro e Vouga
Santa Maria da Feira, 4520-211
About this study
Official title: A Randomized, Double-Blind, Placebo-Controlled, Phase 3 Study of Olezarsen (ISIS 678354) Administered Subcutaneously to Patients With Severe Hypertriglyceridemia
The purpose of this 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 Phase 3, multi-center, randomized, double-blind, placebo-controlled study in 446 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
- Hypertriglyceridemia, Hyperlipidemias, Metabolic Diseases
- Medical subject headings
- Hypertriglyceridemia, Hyperlipidemias, Metabolic Diseases
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 | 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 subcutaneous (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 posted23 Sep 2022
- Study start31 Aug 2022
- Primary completion17 Dec 2024
- Study completion12 Sep 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
- 446 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
- NCT05552326
- Sponsor's protocol ID
- ISIS 678354-CS6
- Other IDs
- 2022-501420-20
- Status last verified
- Oct 2025
- First submitted
- 20 Sep 2022
- Last updated
- 22 Oct 2025
- 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, 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 22 Oct 2025. 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) Administered Subcutaneously to Patients With Severe Hypertriglyceridemia
- ClinicalTrials.gov ID
- NCT05552326
- Acronym / sponsor ID
- ISIS 678354-CS6
- Conditions
- Severe Hypertriglyceridemia
- Keywords
- Hypertriglyceridemia, Hyperlipidemias, Metabolic Diseases
- Phase
- Phase 3
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 446 participants (actual)
- Lead sponsor
- Ionis Pharmaceuticals, Inc.Industry (pharma, biotech, devices)
- Study start
- 31 Aug 2022 (actual)
- Primary completion
- 17 Dec 2024 (actual)
- Study completion
- 12 Sep 2025 (actual)
- First posted
- 23 Sep 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 this 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 Phase 3, multi-center, randomized, double-blind, placebo-controlled study in 446 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 subcutaneous (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 (3 listed)
- Fasting TG ≥ 500 mg/dL (5.65 mmol/L) at Screening and Qualification
- Participants 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.
- Participants must be willing to comply with diet and lifestyle recommendations as able.
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 > 1.5 ULN 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: 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 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 22 Oct 2025.
- 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.
205 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 205 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 3 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 22 Oct 2025. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 205 sites in United States, Bulgaria, Poland, Spain, India 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 NCT05552326, 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 22 Oct 2025.