Phase I/II Clinical Study of JMT108 Injection for the Treatment of Advanced Malignant Melanoma

January 6, 2026 updated by: Shanghai JMT-Bio Inc.

Open-Label, Multicenter Phase I/II Study to Evaluate the Safety, Tolerability, Pharmacokinetics, and Efficacy of JMT108 Injection in Participants With Unresectable or Metastatic Melanoma

This is an open-label, multicenter Phase I/II clinical study conducted in participants with unresectable locally advanced or metastatic melanoma, aiming to evaluate the safety, tolerability, pharmacokinetic characteristics, and efficacy of JMT108 Injection in this population. The study consists of Phase I and Phase II (including Phase IIa and Phase IIb), where Phase I is the dose-escalation stage, Phase IIa is the dose-expansion stage, and Phase IIb is the cohort-expansion stage.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
188

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 2
  • Phase 1

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.
  • Name: Clinical Trials Information Group officer
  • Phone Number: 86-0311-69085587
  • Email: ctr-contact@cspc.cn

Study Locations

  • China
    • Beijing Municipality
      • Beijing, Beijing Municipality, China

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  1. Age≥18 years old.
  2. Histologically or cytologically confirmed unresectable locally advanced or metastatic melanoma.
  3. Participants with unresectable locally advanced or metastatic melanoma who have failed prior standard treatment or have no available standard treatment will be enrolled in Phase I and Phase IIa; those who have received or not received prior standard treatment will be enrolled in Phase IIb.
  4. According to the response evaluation criteria for solid tumors (RECIST 1.1), having at least one measurable lesion.
  5. ECOG PS of 0-1.
  6. Expected survival ≥ 3 months.
  7. Participants with adequate organ functions.
  8. Female and male patients of childbearing age agree to take adequate contraceptive measures during and upon completion of the study for 6 months after the last dose. Female participants of childbearing age must have a negative blood pregnancy test within 7 days before the first dose or randomization.
  9. Voluntarily agree to participate in the study and sign the informed consent.

Exclusion Criteria:

  1. Received chemotherapy, radiotherapy, biotherapy, endocrine therapy, targeted therapy, immunotherapy, or other unapproved clinical trial drugs or treatments within 4 weeks prior to the first administration of the study drug.
  2. Prior use of IL-2/IL-15 cytokine therapy.
  3. Received major organ surgery (excluding needle biopsy) or experienced severe trauma within 4 weeks prior to the first administration of the study drug, or requires elective surgery during the study period.
  4. Received systemic glucocorticoids or other immunosuppressive therapy within 14 days prior to the first use of the study drug. Exceptions include the following situations: receiving physiological replacement doses of hydrocortisone or other equivalent doses of hormonal therapy (i.e., prednisone ≤ 10 mg/day or other equivalent doses of hormones); receiving topical, ophthalmic, intra-articular, intranasal, and inhaled glucocorticoid therapy; receiving short-course glucocorticoids for preventive treatment (e.g., prevention of contrast agent allergy).
  5. Known active central nervous system (CNS) metastases and/or leptomeningeal metastases. Patients with stable brain metastases who do not require local treatment for brain metastases are eligible for inclusion.
  6. Patients with active infections requiring intravenous anti-infective therapy within 14 days prior to the first administration.
  7. Has a history of severe cardiovascular and cerebrovascular diseases.
  8. Has active or recurrent autoimmune diseases.
  9. Has a known history of receiving immunotherapy with the occurrence of grade ≥3 immune-related adverse events (irAEs) (excluding immune-related endocrine abnormalities that have been stabilized) or grade ≥2 immune-related myocarditis.
  10. Has a history of arterial or venous thrombosis within 6 months prior to the first administration.
  11. Has a history of serous effusions such as ascites or pleural effusion requiring drainage within 14 days prior to the first administration.
  12. Has a history of other malignant tumors within 5 years prior to the first administration or concurrent other malignant tumors.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Non-Randomized
  • Interventional Model: Sequential Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Phase I: Dose Escalation Stage
JMT108 intravenous (IV) administration, use as specified in the clinical study protocol.
Drug: JMT108
Intravenous (IV) administration
Experimental: Phase IIa: Dose Expansion Stage
The administered dose of JMT108 selected by the SMC.
Drug: JMT108
Intravenous (IV) administration
Experimental: Phase IIb: Cohort 1
RP2D of JMT108 selected by the SMC.
Drug: JMT108
Intravenous (IV) administration
Experimental: Phase IIb: Cohort 2
RP2D of JMT108 selected by the SMC.
Drug: JMT108
Intravenous (IV) administration

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Dose-Limiting Toxicity (DLT) (Phase I)
Time Frame: Approximately 28 days.
To evaluate the safery of JMT108 in subjects.
Approximately 28 days.
Adverse Events (AEs) (Phase I)
Time Frame: Through study completion, an average of 1 year
To evaluate the safery of JMT108 in subjects.
Through study completion, an average of 1 year
Overall Response Rate (ORR) (Phase II)
Time Frame: To evaluate the efficacy of JMT108 in subjects.
Through study completion, an average of 1 year.
To evaluate the efficacy of JMT108 in subjects.

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Maximum plasma concentration (Cmax)
Time Frame: Through study completion, an average of 1 year.
To evaluate the systemic pharmacokinetics of JMT108 in subjects.
Through study completion, an average of 1 year.

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Shanghai JMT-Bio Inc.

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
December 17, 2025

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
November 30, 2026

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
May 30, 2027

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
November 28, 2025

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
December 10, 2025

First Posted (Estimated)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
December 12, 2025

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
January 7, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
January 6, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
November 1, 2025

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • JMT108-003

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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