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Obesity DiseasePhase 3MARITIME-3-JNCT06987695

Efficacy and Safety of Maridebart Cafraglutide in Adult Participants in Japan Who Have Obesity Disease

A Phase 3 study testing Maridebart cafraglutide in people with Obesity Disease, run by Amgen at 30 sites in Japan.

Active, not recruiting

Under way, not looking for participants. Everyone needed has enrolled. The study is still running.

Official record
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Trial summary

The primary objective of this study is to demonstrate that maridebart cafraglutide is superior to placebo for percent change in body weight and proportion of participants with ≥ 5% reduction in body weight. Read more about this study

Who is it for?
Ages 18 to 99 years
Conditions the study is for
Obesity Disease
What is being tested?
Maridebart cafraglutide
Type of treatment
Injection or infusion
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
279 participants
Where
30 sitesJapan
Study dates
13 Jun 2025to 21 Jul 2027
Phase
Phase 3
Are there results?
Not yet: the study is under way

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 to 99 years
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Age ≥ 18 years.
  • History of at least 1 self-reported unsuccessful attempt at weight loss by diet and exercise.
  • Body mass index (BMI) ≥ 35 kg/m^2 at screening with a current diagnosis of at least 1 of the weigh-related comorbidities specified in the Japan Society for the Study of Obesity (JASSO) guideline OR BMI ≥ 27 kg/m^2 to < 35 kg/m^2 at screening, with a current diagnosis of at least 2 of the weight-related comorbidities specified in the JASSO guideline.
  • For both BMI categories, at least 1 of the weight-related comorbidities must be hypertension, dyslipidemia, or T2DM according to the definitions below:
  • hypertension: treated, or with SBP ≥ 140 mmHg, or DBP ≥ 90 mmHg at screening.
  • dyslipidemia: treated, or with LDL > 140 mg/dL (3.6 mmol/L), or triglycerides ≥ 150 mg/dL (1.7 mmol/L), or non-HDL cholesterol > 170 mg/dL (4.4 mmol/L) or HDL < 40 mg/dL (1.0 mmol/L) at screening.
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  • T2DM: diagnosed ≥ 180 days before screening, and treated with diet and exercise alone and/or a stable treatment for at least 90 days before screening with up to 3 oral glucose-lowering medications (as per local labeling) (except for glucagon-like peptide-1 receptor agonists [GLP-1RA] and dipeptidyl peptidase-4 [DPP-4] inhibitors), and have a HbA1c ≥ 7% and ≤ 10% (53-86 mmol/mol) at screening.
  • In the opinion of the investigator, well-motivated and willing to:
  • Follow study procedures for the duration of the study, including, but not limited to, follow lifestyle advice, maintain a study log(s)/diary(ies), and complete required study visits and questionnaires.
  • Perform self-monitoring blood glucose (SMBG) per protocol (only for participants with T2DM).

Who cannot join

  • Obesity induced by other endocrinological disorders or monogenetic or syndromic forms of obesity.
  • Self-reported change in body weight > 5 kg within 90 days before screening.
  • Previous or planned (during the study) surgical, endoscopic, or device-based treatment for obesity.
  • For participants without diabetes at screening, type 1 or 2 diabetes mellitus or any other types of diabetes mellitus (except history of gestational diabetes).
  • For participants with T2DM at screening, any other type(s) of diabetes mellitus except T2DM.
  • History of chronic pancreatitis or history of acute pancreatitis within 180 days before screening.
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  • Family (first-degree relative[s]) or personal history of medullary thyroid carcinoma (MTC) or multiple endocrine neoplasia syndrome type 2 (MEN-2).
  • History of unstable major depressive disorder (MDD) or other severe psychiatric disorder within 2 years before screening.
  • Lifetime history of suicide attempt.

Trial locations and contacts

30 sites in 1 country.

30 sites in 1 country

Japan30 sites
  • Adachi Kyosai Hospital

    Adachi-ku, Tokyo, 120-0022

  • Aira Diabetes Thyroid Internal Medicine Clinic

    Aira-shi, Kagoshima-ken, 899-5421

  • Yamasaki Family Clinic

    Amagasaki-shi, Hyōgo, 660-0861

  • Nihonbashi Sakura Clinic

    Chuo-ku, Tokyo, 103-0025

  • Medical Corporation Chiseikai Tokyo Center Clinic

    Chuo-ku, Tokyo, 103-0027

  • Wellness Tenjin Clinic

    Fukuoka, Fukuoka, 810-0001

  • Medical Corporation Boocs Boocs Clinic Fukuoka

    Fukuoka, Fukuoka, 812-0025

  • Kyushu University Hospital

    Fukuoka, Fukuoka, 812-8582

  • Tashiro Endocrinology Clinic

    Fukuoka, Fukuoka, 814-0153

  • Medical Corporation Kenshinkai Minamino Cardiovascular Hospital

    Hachioji-shi, Tokyo, 192-0918

  • Matsunami Health Promotion Clinic

    Hashima-gun, Gifu, 501-6061

  • Matsuba Clinic

    Kawasaki-shi, Kanagawa, 212-0024

  • Kobe University Hospital

    Kobe, Hyōgo, 650-0017

  • Deguchi Clinic

    Kobe, Hyōgo, 652-0803

  • Medical Corporation Keiseikai Kajiyama Clinic

    Kyoto, Kyoto, 600-8898

  • Kyoto University Hospital

    Kyoto, Kyoto, 606-8507

  • Tokyo Saiseikai Central Hospital

    Minato-ku, Tokyo, 108-0073

  • Midori Clinic

    Nagasaki, Nagasaki, 852-8034

  • Meitetsu Hospital

    Nagoya, Aichi-ken, 451-8511

  • Hosokawa Surgical Clinic

    Nagoya, Aichi-ken, 453-0812

  • Social Medical Corporation Kojunkai Daido Clinic

    Nagoya, Aichi-ken, 457-8511

  • Nishiyamado Keiwa Hospital

    Naka, Ibaraki, 311-0133

  • Shimamura Memorial Hospital

    Nerima-ku, Tokyo, 177-0051

  • Fukuoka Shinmizumaki Hospital

    Onga-gun, Fukuoka, 807-0051

  • Joh Medical Clinic

    Osaka, Osaka, 530-0002

  • Manda Memorial Hospital

    Sapporo, Hokkaido, 060-0062

  • MIH Clinic Yoyogi

    Shibuya-ku, Tokyo, 151-0051

  • Shinjuku Southern Clinic

    Shinjuku-ku, Tokyo, 160-0023

  • Ikebukuro Metropolitan Clinic

    Toshima-ku, Tokyo, 171-0021

  • Urasoe General Hospital

    Urasoe-shi, Okinawa, 901-2102

Other trials in Japan

About this study

Official title: A Phase 3 Randomized, Double-blind, Placebo-controlled Study to Evaluate the Efficacy, Safety, and Tolerability of Maridebart Cafraglutide in Adult Participants in Japan Who Have Obesity Disease (MARITIME 3-J)

The primary objective of this study is to demonstrate that maridebart cafraglutide is superior to placebo for percent change in body weight and proportion of participants with ≥ 5% reduction in body weight.

Conditions
Obesity Disease
Being tested
Maridebart cafraglutide, Placebo
Keywords
Overweight, BMI, Body weight, Maridebart cafraglutide, Chronic weight management, MariTide, Type 2 Diabetes Mellitus, T2DM
Medical subject headings
Overweight, Body Weight, Diabetes Mellitus, Type 2

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Maridebart cafraglutideDrug

    Also called AMG 133, MariTide

    Maridebart cafraglutide will be administered SC.

  • PlaceboDrug

    Placebo will be administered SC.

Study groups in NCT06987695
Study groupRoleWhat they receive
Maridebart Cafraglutide High DoseExperimentalParticipants will receive maridebart cafraglutide high dose subcutaneously (SC) for 72 weeks.
Receives: Drug: Maridebart cafraglutide
Maridebart Cafraglutide Medium DoseExperimentalParticipants will receive maridebart cafraglutide medium dose SC for 72 weeks.
Receives: Drug: Maridebart cafraglutide
Maridebart Cafraglutide Low DoseExperimentalParticipants will receive maridebart cafraglutide low dose SC for 72 weeks.
Receives: Drug: Maridebart cafraglutide
PlaceboPlacebo comparatorParticipants will receive placebo SC for 72 weeks.
Receives: Drug: Placebo

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Percent Change From Baseline in Body Weight at Week 72

    Measured: Baseline and Week 72

  2. Participants Achieving ≥ 5% Reduction in Body Weight From Baseline at Week 72

    Measured: Baseline and Week 72

Secondary outcomes (30)
  1. Change From Baseline in Waist Circumference at Week 72

    Measured: Baseline and Week 72

  2. Participants Achieving ≥ 10% Reduction in Body Weight from Baseline at Week 72

    Measured: Baseline and Week 72

  3. Participants Achieving ≥ 15% Reduction in Body Weight from Baseline at Week 72

    Measured: Baseline and Week 72

  4. Change From Baseline in Body Weight at Week 72

    Measured: Baseline and Week 72

  5. Percent Change From Baseline in Body Weight in Participants Without Type 2 Diabetes Mellitus (T2DM) at Week 72

    Measured: Baseline and Week 72

  6. Percent Change From Baseline in Body Weight in Participants With T2DM at Week 72

    Measured: Baseline and Week 72

  7. Change From Baseline in Body Mass Index (BMI) at Week 72

    Measured: Baseline and Week 72

  8. Participants Achieving ≥ 20% Reduction in Body Weight from Baseline at Week 72

    Measured: Baseline and Week 72

  9. Change From Baseline in Visceral Fat Area (VFA) at Week 72

    Measured: Baseline and Week 72

  10. Participants Achieving VFA < 100 cm^2 in VFA at Week 72

    Measured: Week 72

  11. Percent Change From Baseline in Fasting Total Cholesterol at Week 72

    Measured: Baseline and Week 72

  12. Percent Change From Baseline in Fasting Non-high-density Lipoprotein Cholesterol (non-HDL-C) at Week 72

    Measured: Baseline and Week 72

  13. Percent Change From Baseline in Fasting Low-density Lipoprotein Cholesterol (LDL-C) at Week 72

    Measured: Baseline and Week 72

  14. Percent Change From Baseline in Fasting Triglycerides at Week 72

    Measured: Baseline and Week 72

  15. Percent Change From Baseline in Fasting Very Low-density Lipoprotein Cholesterol (VLDL-C) at Week 72

    Measured: Baseline and Week 72

  16. Percent Change From Baseline in Fasting High-density Lipoprotein Cholesterol (HDL-C) at Week 72

    Measured: Baseline and Week 72

  17. Change From Baseline in Systolic Blood Pressure (SBP) at Week 72

    Measured: Baseline and Week 72

  18. Change From Baseline in Diastolic Blood Pressure (DBP) at Week 72

    Measured: Baseline and Week 72

  19. Change From Baseline in Fasting Plasma Glucose at Week 72

    Measured: Baseline and Week 72

  20. Percent Change From Baseline in Fasting Insulin at Week 72

    Measured: Baseline and Week 72

  21. Change from Baseline in Hemoglobin A1c (HbA1c) at Week 72

    Measured: Baseline and Week 72

  22. Percentage of Participants with a Change from Baseline in Glycemic Status at Week 72 for Participants Without T2DM at Baseline

    Glycemic status was categorized as:

    • normoglycemic (fasting plasma glucose < 100 mg/dL and HbA1c < 5.7%, in absence of T2DM diagnosis),
    • prediabetes (fasting plasma glucose 100 - 125 mg/dL or HbA1c 5.7% - 6.4% in the absence of a T2DM diagnosis),
    • or, T2DM (fasting plasma glucose ≥ 126 mg/dL and HbA1c ≥6.5%).

    Measured: Baseline and Week 72

  23. Participants With T2DM Achieving HbA1c < 7% at Week 72

    Measured: Week 72

  24. Participants With T2DM Achieving HbA1c ≤ 6.5% at Week 72

    Measured: Week 72

  25. Participants With T2DM Achieving HbA1c < 5.7% at Week 72

    Measured: Week 72

  26. Change From Baseline in Short Form 36 Health Survey Version 2 (SF-36v2) Acute Physical Function Domain Score at Week 72

    The SF-36v2 Acute Physical Function domain score measures an individual's ability to perform daily physical activities, such as walking and climbing stairs, over the past week. It includes 10 items scored on a 3-point Likert scale, with raw scores transformed to a 0-100 scale. Higher scores indicate better physical functioning and fewer limitations due to physical health.

    Measured: Baseline and Week 72

  27. Change from Baseline in the Impact of Weight on Quality of Life-Lite Clinical Trials Version (IWQOL-Lite-CT) Physical Function Composite Score at Week 72

    The IWQOL-Lite-CT is a 20-item questionnaire designed to assess the impact of weight on quality of life in clinical trials. Items are scored on a 5-point Likert scale, with raw scores transformed to a 0-100 scale, where higher scores indicate better quality of life and less weight-related impact.

    Measured: Baseline and Week 72

  28. Number of Participants Experiencing Treatment-emergent Adverse Events (TEAEs)

    Measured: Up to Week 84

  29. Number of Participants Experiencing Serious Adverse Events

    Measured: Up to Week 84

  30. Plasma Concentration of Maridebart Cafraglutide at Week 72

    Measured: Week 72

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted23 May 2025
  2. Study start13 Jun 2025
  3. Primary completion27 Apr 2027 (estimated)
  4. Study completion21 Jul 2027 (estimated)

Resources

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
Double blind
Who is masked
Participant, Investigator
Enrolment
279 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT06987695
Sponsor's protocol ID
20230144
Acronym
MARITIME-3-J
Status last verified
Dec 2025
First submitted
2 May 2025
Last updated
17 Dec 2025
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No
Individual data sharing
Yes: De-identified individual patient data for variables necessary to address the specific research question in an approved data sharing request.

Questions about this trial

What is this clinical trial studying?

A Phase 3 study testing Maridebart cafraglutide in people with Obesity Disease, run by Amgen at 30 sites in Japan.

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 10 inclusion and 9 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: under way, not looking for participants, as of the sponsor's last update on 17 Dec 2025. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 30 sites in Japan. 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?

This study is still under way. Results are not available in the source record yet.

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 Body Weight at Week 72 (time frame: Baseline and Week 72). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?
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 17 Dec 2025.

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