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Maridebart Cafraglutide in Heart Failure With Preserved or Mildly Reduced Ejection Fraction and Obesity

A Phase 3 Randomized, Double-blind, Placebo-controlled Study to Evaluate the Efficacy and Safety of Maridebart Cafraglutide on Mortality and Morbidity in Participants Living With Heart Failure With Preserved or Mildly Reduced Ejection Fraction and Obesity (MARITIME-HF)

Status
Recruiting
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07037459
Acronym
MARITIME-HF
Enrollment
5056
Registered
2025-06-25
Start date
2025-06-25
Completion date
2030-09-29
Last updated
2026-04-02

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

Conditions

Heart Failure With Preserved Ejection Fraction, Heart Failure With Mildly Reduced Ejection Fraction, Obesity

Keywords

Heart Failure, Obesity, Maridebart Cafraglutide, AMG 133, MariTide

Brief summary

This trial will examine if maridebart cafraglutide as an adjunct to standard of care will lead to a reduction in heart failure (HF) events such as HF hospitalizations and urgent HF visits, cardiovascular (CV) deaths and improvement in HF symptoms in participants with HF with preserved ejection fraction (HFpEF) and HF with mildly reduced ejection fraction (HFmrEF) who are obese. This is a phase 3, global, multicenter, 2-part trial with a double-blind period and an open-label extension (OLE). The trial is event-driven, and Part 1 will conclude when approximately 850 primary endpoint events have occurred.

Interventions

Maridebart cafraglutide will be administered SC.

DRUGPlacebo

Placebo will be administered SC.

Sponsors

Amgen
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
DOUBLE (Subject, Investigator)

Eligibility

Sex/Gender
ALL
Age
18 Years to 99 Years
Healthy volunteers
No

Inclusion criteria

* Age ≥ 18 years at the time of informed consent. * BMI ≥ 30.0 kg/m\^2 at the time of randomization. * HF diagnosed for at least 30 days with New York Heart Association (NYHA) Class II-IV at the time of informed consent. * Managed with HF standard of care therapies. * Left ventricular ejection fraction (LVEF) of \> 40% within 12 months from the beginning of screening. * Elevated NT-proBNP. * Participants must have at least one of the following: 1. Structural heart disease within 12 months prior to screening OR 2. Documented hospitalization with a primary diagnosis of decompensated HF which required IV loop diuretic treatment \> 30 days and \< 12 months prior to randomization OR 3. Evidence of elevated filling pressures within 12 months before randomization.

Exclusion criteria

* History of any of the following within 60 days prior to or during screening: Type I (spontaneous) MI, valvular replacement or repair, coronary revascularization, coronary artery bypass graft surgery or other major cardiovascular surgery, stroke. * HF due to: hypertrophic cardiomyopathy, infiltrative cardiomyopathy, active myocarditis, constrictive pericarditis, cardiac tamponade, arrhythmogenic right ventricular or left ventricular cardiomyopathy/dysplasia, uncorrected primary valvular heart disease, clinically significant congenital heart disease. * Any lifetime history of LVEF ≤ 40%. * Hospitalized with acute decompensated HF at the time of or during the screening period. * Type 1 diabetes mellitus, or any type of diabetes with the exception of T2DM or history of gestational diabetes. * For participants with a prior diagnosis of T2DM (including those diagnosed during screening): 1. HbA1c \> 10.0% (86 mmol/mol) at screening 2. Uncontrolled diabetes requiring immediate therapy 3. History of diabetic ketoacidosis or hyperosmolar state/coma within 12 months before randomization 4. One or more episodes of severe hypoglycemia within 6 months before randomization and/or history of hypoglycemia unawareness 5. History or presence of either proliferative diabetic retinopathy, or diabetic maculopathy, or severe non-proliferative diabetic retinopathy; or currently receiving or planning to receive treatment for diabetic retinopathy and/or macular edema. * SBP ≥ 180 mmHg during the screening period, or on three or more blood pressure-lowering drugs with a SBP \> 160 mmHg during the screening period. * History of chronic pancreatitis or acute pancreatitis in the 180 days before screening or during the screening period. * Any personal lifetime history of, or family history(first-degree relative\[s\]) of medullary thyroid carcinoma or MEN-2. * eGFR \< 20 mL/min/1.73 m\^2 (CKD-EPI creatinine (Cr)-cystatin C equation) or receiving dialysis at screening. * Calcitonin ≥ 50 ng/L (pg/mL) at screening. * Acute or chronic hepatitis. * Any of the following psychiatric history: 1. History of unstable major depressive disorder or other severe psychiatric disorder within 2 years prior to screening or during the screening period 2. Lifetime history of suicide attempt 3. History of non-suicidal self-injury within 5 years prior to screening or during the screening period. * History of any other condition that, in the opinion of the investigator, may preclude the participant from following the protocol and completing the trial. * Use of any glucagon-like peptide 1 receptor agonist (GLP-1 RA), glucose-dependent insulinotropic polypeptide (GIP) agonists or antagonists, or amylin analogs within 90 days prior to or during the screening period or planned use during the conduct of the trial.

Design outcomes

Primary

MeasureTime frameDescription
Time to First Occurrence of a Composite Endpoint Consisting of: CV Death or HF EventsUp to approximately 35 monthsHeart Failure events include: hospitalization for HF or urgent HF visits.

Secondary

MeasureTime frameDescription
Change From Baseline in Kansas City Cardiomyopathy Questionnaire (KCCQ) Clinical Summary Score (CSS) for Participants with Baseline KCCQ-CSS Score ≤ 80Baseline and Week 48The KCCQ is a 23-item disease-specific measure for participants with HF, measuring the participant's perception of their health status. The KCCQ-CSS assesses symptoms and physical limitations, ranging from 0 to 100, with higher scores indicating better functioning and quality of life.
Change from Baseline in the KCCQ Total Symptom Score (TSS) for Participants with Baseline KCCQ-CSS Score ≤ 80Baseline and Week 48The KCCQ is a 23-item disease-specific measure for participants with HF, measuring the participant's perception of their health status. The KCCQ-TSS assesses symptom frequency and burden, ranging from 0 to 100, with higher scores indicating better functioning and quality of life.
Total Number of HF Events Including First and Recurrent HF EventsUp to approximately 35 months
Time to First Occurrence of a Composite Endpoint Consisting of: Myocardial Infarction (MI), Ischemic Stroke, CV Death (Major Adverse Cardiac Events [MACE]), or HF EventsUp to approximately 35 months
Time to First Event of a Composite Nephropathy EndpointUp to approximately 35 monthsThe composite nephropathy endpoint consists of: persistent macroalbuminuria, persistent ≥ 40% reduction in estimated glomerular filtration rate (eGFR), onset of persistent eGFR \< 15 mL/min/1.73 m\^2, initiation of chronic renal replacement therapy (dialysis or transplantation), CV or renal death.
Change in eGFR Slope (Total)Baseline up to approximately 35 months
Change in eGFR Slope (Chronic)From 4 months up to approximately 35 months
Time to Onset of Type 2 Diabetes Mellitus (T2DM) in Participants with PrediabetesUp to approximately 35 months
Time to the First HF EventUp to approximately 35 months
Change from Baseline in the Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)Baseline and Week 72
Change from Baseline in Body Mass Index (BMI) (kg/m^2)Baseline and Week 72
Change from Baseline in the Waist Circumference (cm)Baseline and Week 72
Change from Baseline in the Urine Albumin-to-creatinine Ratio (uACR)Baseline and Week 72
Change from Baseline in the Hemoglobin A1c (HbA1c [%, mmol/mol]) in Participants with T2DMBaseline and Week 72
Percent Change from Baseline in the High-sensitivity C Reactive Protein (hs-CRP)Baseline and Week 72
Percent Change from Baseline in the Body Weight (kg)Baseline and Week 72
Percent Change from Baseline in Total CholesterolBaseline and Week 72
Percent Change from Baseline in Non-high-density Lipoprotein Cholesterol (non-HDL-C)Baseline and Week 72
Percent Change from Baseline in Low-density Lipoprotein Cholesterol (LDL-C), HDL-C, Triglycerides (TG), Very Low-density Lipoprotein Cholesterol (VLDL-C)Baseline and Week 72
Total All-cause Hospitalizations (First and Recurrent Time to Event)Up to approximately 35 months
Number of Participants Achieving ≥ 5-point Change in KCCQ-CSS Score from Baseline for Participants with Baseline KCCQ-CSS Score ≤ 80Baseline and Week 48The KCCQ is a 23-item disease-specific measure for participants with HF, measuring the participant's perception of their health status. The KCCQ-CSS assesses symptoms and physical limitations, ranging from 0 to 100, with higher scores indicating better functioning and quality of life.
Number of Participants Achieving ≥ 10-point Change in KCCQ-CSS Score from Baseline for Participants with Baseline KCCQ-CSS Score ≤ 80Baseline and Week 48The KCCQ is a 23-item disease-specific measure for participants with HF, measuring the participant's perception of their health status. The KCCQ-CSS assesses symptoms and physical limitations, ranging from 0 to 100, with higher scores indicating better functioning and quality of life.
Number of Participants Achieving an Anchor-based Change in KCCQ-CSS Score From Baseline for Participants with Baseline KCCQ-CSS Score ≤ 80Baseline and Week 48The KCCQ is a 23-item disease-specific measure for participants with HF, measuring the participant's perception of their health status. The KCCQ-CSS assesses symptoms and physical limitations, ranging from 0 to 100, with higher scores indicating better functioning and quality of life. The Patient Global Impression of Severity (PGI-S) and Patient Global Impression of Change (PGI-C) can be used as anchors to estimate within-patient change in the KCCQ-CSS score.
Number of Participants Achieving ≥ 5-point Change in KCCQ-TSS Score from Baseline for Participants with Baseline KCCQ-CSS Score ≤ 80Baseline and Week 48The KCCQ is a 23-item disease-specific measure for participants with HF, measuring the participant's perception of their health status. The KCCQ-TSS assesses symptom frequency and burden, ranging from 0 to 100, with higher scores indicating better functioning and quality of life. The KCCQ-CSS assesses symptoms and physical limitations, ranging from 0 to 100, with higher scores indicating better functioning and quality of life.
Number of Participants Achieving ≥ 10-point Change in KCCQ-TSS Score from Baseline for Participants with Baseline KCCQ-CSS Score ≤ 80Baseline and Week 48The KCCQ is a 23-item disease-specific measure for participants with HF, measuring the participant's perception of their health status. The KCCQ-TSS assesses symptom frequency and burden, ranging from 0 to 100, with higher scores indicating better functioning and quality of life. The KCCQ-CSS assesses symptoms and physical limitations, ranging from 0 to 100, with higher scores indicating better functioning and quality of life.
Number of Participants Achieving an Anchor-based Change in KCCQ-TSS Score from Baseline for Participants with Baseline KCCQ-CSS Score ≤ 80Baseline and Week 48The KCCQ is a 23-item disease-specific measure for participants with HF, measuring the participant's perception of their health status. The KCCQ-TSS assesses symptom frequency and burden, ranging from 0 to 100, with higher scores indicating better functioning and quality of life. The KCCQ-CSS assesses symptoms and physical limitations, ranging from 0 to 100, with higher scores indicating better functioning and quality of life. The PGI-S and PGI-C can be used as anchors to estimate within-patient change in the KCCQ-CSS score.
Time to All-cause DeathUp to approximately 35 months
Time to CV DeathUp to Approximately 35 Months
Number of Participants with Treatment-emergent Adverse Events and Serious Adverse EventsUp to approximately 35 months
Plasma Concentration of Maridebart CafraglutideWeek 72
Change from Baseline in N-terminal Pro B Type Natriuretic Peptide (NT-proBNP)Baseline and Week 72
Time to New Onset of Atrial Fibrillation (AF) or Atrial Flutter (AFL) in Participants Without a History of AF or AFL at BaselineBaseline and up to approximately 35 months

Countries

Argentina, Australia, Austria, Belgium, Brazil, Bulgaria, Canada, Chile, China, Czechia, Denmark, Finland, France, Germany, Greece, Hong Kong, Hungary, Italy, Japan, Mexico, Netherlands, Poland, Portugal, Romania, Slovakia, South Korea, Spain, Sweden, Switzerland, Taiwan, Turkey (Türkiye), United Kingdom, United States

Contacts

CONTACTAmgen Call Center
medinfo@amgen.com866-572-6436
STUDY_DIRECTORMD

Amgen

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Apr 3, 2026