Study of MT-4561 for Advanced Solid Tumors

This study is testing a new drug called MT-4561 for people with advanced solid tumors, including head and neck, lung, esophageal, gastric, and biliary tract cancers. You might be able to join if you are 18 or older, have tried at least one other treatment, and have no other standard options or cannot tolerate them. The main goals are to see how safe MT-4561 is, what side effects it causes, and to find the right dose. This is a "First In Human" study, meaning it's one of the first times this drug is being tested in people. The study plans to enroll 27 participants.

Study design
This is a Phase I/II, open-label study, meaning both you and your doctors will know you are receiving MT-4561. It is designed to evaluate the drug in approximately 27 participants.
What's involved
The study will track side effects from screening through 30 days after your last dose of MT-4561, which is given intravenously (i.v.).
Compensation
Not stated in the trial record.
Follow-up
You will be followed for adverse events (side effects) from screening through 30 days after your last dose of MT-4561.

AI-generated from the public study record. Only the study team can confirm whether you're eligible — confirm details with them before making decisions.

NCT06943521

A Study of MT-4561 in Patients With Various Advanced Solid Tumors

Recruiting
PHASE1Ages 18+InterventionalTreatment
Tanabe Pharma America, Inc.
~27 participants
Updated 2025-12-11 on ClinicalTrials.gov
What's tested:MT-4561

At a glance

Recruiting sites
6 of 6 listed sites are recruiting right now
RecruitingSuspended, closed, or not yet open
What they're measuring
Incidence of Adverse Event, Dose limiting toxicities (DLTs)
Measured over a 28-day cycle
+1 more outcome measured
Head and Neck Squamous Cell Carcinoma (HNSCC)
Non-small Cell Lung Cancer (NSCLC)
Esophageal Cancer
Gastric Cancer
Biliary Tract Cancer
Pancreatic Ductal Adenocarcinoma (PDAC)
Breast Cancer
Ovarian Cancer
Cervical Cancer
Endometrial Cancer
Prostate Cancer
Urothelial Carcinoma
Neuroendocrine Tumor (NET)
Neuroendocrine Carcinoma (NEC)
Soft Tissue Sarcoma
Nuclear Protein in Testis (NUT) Carcinoma
6 sites across 6 states
California1
Michigan1
Ohio1
Texas1
Tokyo1
Japan1
  • Head of Medical Science · STUDY_DIRECTOR · Tanabe Pharma America, Inc.
Clinical Trials Information Desk, to prevent miscommunication,
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Eligibility criteria

Inclusion

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 adenocarcinoma (PDAC), breast cancer, ovarian cancer, cervical cancer, endometrial cancer, prostate cancer, urothelial carcinoma, neuroendocrine tumor (NET) or neuroendocrine carcinoma (NEC), soft tissue sarcoma, and NUT carcinoma.

Exclusion

Patients with active brain or leptomeningeal metastases
Any unresolved toxicity ≥ Grade 2 from previous anticancer therapy except for alopecia
Prior systemic anticancer therapy within 4 weeks before first dose of investigational medicinal product (IMP) or 5 half-lives, whichever is shorter, and prior radiotherapy within 2 weeks before first dose of IMP
History of congenital long QT syndrome or clinically significant ventricular arrhythmias (such as ventricular tachycardia, ventricular fibrillation or Torsades de pointes)
Patients who received drugs with a known risk of QT interval prolongation or Torsades de pointes within 14 days or 5 half-lives, whichever is shorter, before the start of IMP administration
QT interval corrected for heart rate using Fridericia's correction (QTcF) \> 470 msec at screening
  • Incidence of Adverse Event, Dose limiting toxicities (DLTs)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)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.