NCT06943521 · Mitsubishi Tanabe Pharma America Inc.
A Study of MT-4561 in Patients With Various Advanced Solid Tumors
What this study is about
This is a First In Human (FIH), conducted at multiple hospitals, where both patients and doctors know the treatment given, Phase I/II study to evaluate safety, tolerability, how the drug moves through the body (PK), how the drug affects the body, and effectiveness of MT-4561 in patients with advanced solid tumors. This study will be conducted in 3 parts.
View original scientific description
This is a First In Human (FIH), multicenter, open-label, Phase I/II study to evaluate safety, tolerability, Pharmacokinetics (PK), pharmacodynamics, and efficacy of MT-4561 in patients with advanced solid tumors. This study will be conducted in 3 parts. Part 1 is aimed at evaluating safety, tolerability, PK and pharmacodynamics of MT-4561 and determining the Maximum Tolerated Dose (MTD) using the Bayesian Optimal Interval (BOIN) design.
Interventions
DRUG
MT-4561
i.v.
Primary outcome measures
Incidence of Adverse Event, Dose limiting toxicities (DLTs)
Time frame: a 28-day cycle
Part 1 Frequency, duration, and severity (Common Terminology Criteria for Adverse Events \[CTCAE\] v5.0) of adverse events, dose limiting toxicity (DLT), physical examinations, changes in clinical laboratory values (e.g., hematology, chemistry, and urinalysis), vital signs (e.g., heart rate, blood pressure, respiratory rate), electrocardiogram DLTs are defined as any event meeting the DLT criteria at least possibly related to MT-4561 for Cycle 1 (i.e., DLT monitoring window is approximately 28 days). Events with a clear alternative explanation will not be considered DLTs.
Number of Patients with Adverse events (AEs)
Time frame: Screening through 30 days after last dose
Part 1 Frequency, duration, and severity (Common Terminology Criteria for Adverse Events \[CTCAE\] v5.0) of adverse events, dose limiting toxicity (DLT), physical examinations, changes in clinical laboratory values (e.g., hematology, chemistry, and urinalysis), vital signs (e.g., heart rate, blood pressure, respiratory rate), electrocardiogram Adverse event: An AE is defined as any untoward medical occurrence in a clinical study patient administered a pharmaceutical product, and which does not necessarily have a causal relationship with this treatment. An AE can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding, for example), symptom, or disease temporally associated with the use of an IMP, whether it is considered related to the IMP.
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- Patients who have failed at least 1 prior therapy and, who have no standard treatment options demonstrated to provide clinical benefit or who are intolerable to or refuse further standard therapies will be enrolled.
- Male or female patient aged 18 years or older at the time of signing the informed consent form
- ≥ 1 measurable lesion by the RECIST v1.1
- Eastern Cooperative Oncology Group (ECOG) performance status: 0 to 1
- Life expectancy of at least 3 months
- Adequate bone marrow function
- Adequate hepatic function
- Adequate renal function estimated creatinine clearance ≥ 60 mL/min calculated using the Cockcroft and Gault equation or by institutional method
- Part 1: Patients must have a confirmed histologic or cytologic diagnosis of one of the following solid tumors for participation in the study: head and neck squamous cell carcinoma (HNSCC), non-small cell lung cancer (NSCLC), esophageal cancer, gastric cancer, biliary tract cancer, pancreatic ductal
Where
- Los Angeles, California
- Grand Rapids, Michigan
- Columbus, Ohio
- Houston, Texas
Related conditions & keywords
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced Dec 11, 2025 · Source of record for eligibility and locations