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NCT Number: NCT07037459

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

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.

Recruiting

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Key information

Age range

18 year–99 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 3

Primary location

Cemedic Centro de Especialidades Medicas, CABA, Buenos Aires, Argentina

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Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Age ≥ 18 years at the time of informed consent.
  • BMI ≥ 30.0 kg/m^2 at 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 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 or chronic myocarditis, constrictive pericarditis, cardiac tamponade, arrhythmogenic right ventricular or left ventricular cardiomyopathy/dysplasia, uncorrected primary valvular heart disease, clinically significant congenital heart disease.
  • 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):
  • HbA1c > 10.0% (86 mmol/mol) at screening
  • Uncontrolled diabetes requiring immediate therapy
  • History of diabetic ketoacidosis or hyperosmolar state/coma within 12 months before randomization
  • One or more episodes of severe hypoglycemia within 6 months before randomization and/or history of hypoglycemia unawareness
  • 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 (including day 1 prior to randomization).
  • 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:
  • History of unstable major depressive disorder or other severe psychiatric disorder within 2 years prior to screening or during the screening period
  • Lifetime history of suicide attempt
  • 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.

Treatment and study plan

Maridebart cafraglutide

Drug

Maridebart cafraglutide will be administered SC.

Other names: AMG 133, MariTide

Placebo

Drug

Placebo will be administered SC.

Primary outcomes

  1. Time to First Occurrence of a Composite Endpoint Consisting of: CV Death or HF Events

    Time frame: Up to approximately 35 months

    Heart Failure events include: hospitalization for HF or urgent HF visits.

Secondary outcomes

  1. Change From Baseline in Kansas City Cardiomyopathy Questionnaire (KCCQ) Clinical Summary Score (CSS) for Participants with Baseline KCCQ-CSS Score ≤ 80

    Time frame: Baseline and Week 48

    The 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.

  2. Change from Baseline in the KCCQ Total Symptom Score (TSS) for Participants with Baseline KCCQ-CSS Score ≤ 80

    Time frame: Baseline and Week 48

    The 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.

  3. Total Number of HF Events Including First and Recurrent HF Events

    Time frame: Up to approximately 35 months

  4. Time to First Occurrence of a Composite Endpoint Consisting of: Myocardial Infarction (MI), Ischemic Stroke, CV Death (Major Adverse Cardiac Events [MACE]), or HF Events

    Time frame: Up to approximately 35 months

  5. Time to First Event of a Composite Nephropathy Endpoint

    Time frame: Up to approximately 35 months

    The 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.

  6. Change in eGFR Slope (Total)

    Time frame: Baseline up to approximately 35 months

  7. Change in eGFR Slope (Chronic)

    Time frame: From 4 months up to approximately 35 months

  8. Time to Onset of Type 2 Diabetes Mellitus (T2DM) in Participants with Prediabetes

    Time frame: Up to approximately 35 months

  9. Time to the First HF Event

    Time frame: Up to approximately 35 months

  10. Change from Baseline in the Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)

    Time frame: Baseline and Week 72

  11. Change from Baseline in Body Mass Index (BMI) (kg/m^2)

    Time frame: Baseline and Week 72

  12. Change from Baseline in the Waist Circumference (cm)

    Time frame: Baseline and Week 72

  13. Change from Baseline in the Urine Albumin-to-creatinine Ratio (uACR)

    Time frame: Baseline and Week 72

  14. Change from Baseline in the Hemoglobin A1c (HbA1c [%, mmol/mol]) and fasting plasma glucose (mg/dL)

    Time frame: Baseline and Week 72

  15. Percent Change from Baseline in the High-sensitivity C Reactive Protein (hs-CRP)

    Time frame: Baseline and Week 72

  16. Percent Change from Baseline in the Body Weight (kg)

    Time frame: Baseline and Week 72

  17. Percent Change from Baseline in Total Cholesterol

    Time frame: Baseline and Week 72

  18. Percent Change from Baseline in Non-high-density Lipoprotein Cholesterol (non-HDL-C)

    Time frame: Baseline and Week 72

  19. Percent Change from Baseline in Low-density Lipoprotein Cholesterol (LDL-C), HDL-C, Triglycerides (TG), Very Low-density Lipoprotein Cholesterol (VLDL-C)

    Time frame: Baseline and Week 72

  20. Total All-cause Hospitalizations (First and Recurrent Time to Event)

    Time frame: Up to approximately 35 months

  21. Number of Participants Achieving ≥ 5-point Change in KCCQ-CSS Score from Baseline for Participants with Baseline KCCQ-CSS Score ≤ 80

    Time frame: Baseline and Week 48

    The 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.

  22. Number of Participants Achieving ≥ 10-point Change in KCCQ-CSS Score from Baseline for Participants with Baseline KCCQ-CSS Score ≤ 80

    Time frame: Baseline and Week 48

    The 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.

  23. Number of Participants Achieving an Anchor-based Change in KCCQ-CSS Score From Baseline for Participants with Baseline KCCQ-CSS Score ≤ 80

    Time frame: Baseline and Week 48

    The 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.

  24. Number of Participants Achieving ≥ 5-point Change in KCCQ-TSS Score from Baseline for Participants with Baseline KCCQ-CSS Score ≤ 80

    Time frame: Baseline and Week 48

    The 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.

  25. Number of Participants Achieving ≥ 10-point Change in KCCQ-TSS Score from Baseline for Participants with Baseline KCCQ-CSS Score ≤ 80

    Time frame: Baseline and Week 48

    The 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.

  26. Number of Participants Achieving an Anchor-based Change in KCCQ-TSS Score from Baseline for Participants with Baseline KCCQ-CSS Score ≤ 80

    Time frame: Baseline and Week 48

    The 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.

  27. Time to All-cause Death

    Time frame: Up to approximately 35 months

  28. Time to CV Death

    Time frame: Up to Approximately 35 Months

  29. Number of Participants with Treatment-emergent Adverse Events and Serious Adverse Events

    Time frame: Up to approximately 35 months

  30. Plasma Concentration of Maridebart Cafraglutide

    Time frame: Week 72

  31. Change from Baseline in N-terminal Pro B Type Natriuretic Peptide (NT-proBNP)

    Time frame: Baseline and Week 72

  32. Time to New Onset of Atrial Fibrillation (AF) or Atrial Flutter (AFL) in Participants Without a History of AF or AFL at Baseline

    Time frame: Baseline and up to approximately 35 months

  33. Time to First Event of a Composite Nephropathy Endpoint

    Time frame: Up to approximately 35 months

    The composite nephropathy endpoint consisting of 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), or CV death.

Study contacts

Contact information is provided by the study sponsor or research team.

Amgen Call Center

CONTACT

[email protected]

866-572-6436

Sponsors and collaborators

Lead sponsor

Amgen

Industry

Registry information

Official study title

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)

Acronym: MARITIME-HF

Important dates

Study start
2025
Primary completion
2028
Study completion
2030
First posted
Jun 25, 2025
Registry last updated
Jul 2, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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