A Study to Investigate the Safety, Tolerability and Pharmacokinetics of MT-6345 in Healthy Subjects

December 12, 2025 updated by: Tanabe Pharma America, Inc.

A Randomised, Double-Blind, Placebo-Controlled Phase I Study to Investigate the Safety, Tolerability and Pharmacokinetics of Single and Multiple Ascending Doses of MT-6345 in Healthy Subjects

The purpose of this study is to Investigate the Safety, Tolerability and Pharmacokinetics of MT-6345 in Healthy Subjects.

Study Overview

Status

Status

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

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 (Actual)

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.
52

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 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 Locations

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

18 years to 55 years (Adult)

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria:

Additional screening criteria check may apply for qualification:

  • Able to provide written informed consent to participate in this study after reading the participant information sheet and Informed Consent Form (ICF), and after having the opportunity to discuss the study with the Investigator or designee.
  • Healthy and free from clinically significant illness or disease as determined by medical history, physical examination, laboratory and other tests at Screening and Day -1.
  • A body weight of ≥60 kg for males and ≥50 kg for females and a body mass index (BMI) (Quetelet index) ranging from 18 to 30.0 kg/m2 inclusive at Screening and Day -1.
  • In the Investigator's opinion, subject is able to understand the nature of the study and any risks involved in participation, and willing to cooperate and comply with the Protocol restrictions and requirements.

Exclusion Criteria:

Additional screening criteria check may apply for qualification:

  • Subjects with clinically significant (in the opinion of the Investigator) endocrine, thyroid, hepatic, respiratory, gastrointestinal, neurological, renal, cardiovascular disease, or history (within the last 5 years) of any significant psychiatric/psychotic illness disorder (including anxiety, depression and reactive depression).
  • Female subjects who are pregnant (positive pregnancy test at Screening or Day -1) or lactating.
  • Having previously received MT-6345 as part of this study.
  • Clinically relevant abnormal medical history, physical findings or laboratory values at Screening or Day -1 that could interfere with the objectives of the study or the safety of the subject, as judged by the Investigator.
  • Subjects who test positive for hepatitis B surface antigen, hepatitis B core antibody, hepatitis C antibody, human immunodeficiency virus (HIV)-1 or HIV-2 antibodies at Screening.

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: Other
  • Allocation: Randomized
  • Interventional Model: Sequential Assignment
  • Masking: Quadruple

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: Single Ascending Dose: MT-6345 & Placebo
Drug: MT-6345
MT-6345
Drug: MT-6345 Placebo
MT-6345 Placebo
Experimental: Multiple Ascending Dose: MT-6345 & Placebo
Drug: MT-6345
MT-6345
Drug: MT-6345 Placebo
MT-6345 Placebo

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
Number of Participants With Mild, Moderate and Severe Adverse Events
Time Frame: Up to 6 weeks

The criteria of Mild, Moderate and Severe are as follows:

Mild: The event is transient and easily tolerated by the subject.

Moderate: The event causes discomfort and interferes with the subject's general condition.

Severe: The event causes considerable interference with the subject's general condition and may be incapacitating.
Up to 6 weeks

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) of MT-6345
Time Frame: Part 1 and Part 2: Pre-dose and post-dose at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, 16, 24, 48, 72 (Day 4), 120 (Day 6), 192 (Day 9), and 336 (Day 15 Follow-up Visit) hours. Part 3: Pre-dose and post-dose at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, 16 and 24 hours.
Cmax was measured for MT-6345 for the PK analysis set (PKPOP) subjects in Part 1 and Part 2, and on Day 1 in Part 3.
Part 1 and Part 2: Pre-dose and post-dose at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, 16, 24, 48, 72 (Day 4), 120 (Day 6), 192 (Day 9), and 336 (Day 15 Follow-up Visit) hours. Part 3: Pre-dose and post-dose at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, 16 and 24 hours.
Time to Maximum Plasma Concentration (Tmax) of MT-6345
Time Frame: Part 1 and Part 2: Pre-dose and post-dose at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, 16, 24, 48, 72 (Day 4), 120 (Day 6), 192 (Day 9), and 336 (Day 15 Follow-up Visit) hours. Part 3: Pre-dose and post-dose at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, 16 and 24 hours.
Tmax was measured for MT-6345 for the PKPOP subjects in Part 1 and Part 2, and on Day 1 in Part 3.
Part 1 and Part 2: Pre-dose and post-dose at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, 16, 24, 48, 72 (Day 4), 120 (Day 6), 192 (Day 9), and 336 (Day 15 Follow-up Visit) hours. Part 3: Pre-dose and post-dose at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, 16 and 24 hours.
Plasma Terminal Elimination Half Life (t½) of MT-6345
Time Frame: Part 1 and Part 2: Pre-dose and post-dose at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, 16, 24, 48, 72 (Day 4), 120 (Day 6), 192 (Day 9), and 336 (Day 15 Follow-up Visit) hours. Part 3: Pre-dose and post-dose at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, 16 and 24 hours.
t1/2 was measured for MT-6345 for the PKPOP subjects in Part 1 and Part 2, and on Day 1 in Part 3.
Part 1 and Part 2: Pre-dose and post-dose at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, 16, 24, 48, 72 (Day 4), 120 (Day 6), 192 (Day 9), and 336 (Day 15 Follow-up Visit) hours. Part 3: Pre-dose and post-dose at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, 16 and 24 hours.
Area Under the Plasma Concentration Time Curve From Time Zero to 24 Hours (AUC0-24h) of MT-6345
Time Frame: Part 1 and Part 2: Pre-dose and post-dose at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, 16, 24, 48, 72 (Day 4), 120 (Day 6), 192 (Day 9), and 336 (Day 15 Follow-up Visit) hours. Part 3: Pre-dose and post-dose at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, 16 and 24 hours.
AUC(0-24h) was computed for MT-6345 for the PKPOP subjects in Part 1 and Part 2, and on Day 1 in Part 3.
Part 1 and Part 2: Pre-dose and post-dose at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, 16, 24, 48, 72 (Day 4), 120 (Day 6), 192 (Day 9), and 336 (Day 15 Follow-up Visit) hours. Part 3: Pre-dose and post-dose at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, 16 and 24 hours.
Area Under the Plasma Concentration Time Curve From Time Zero to the Last Measurable Concentration (AUC0-last) of MT-6345
Time Frame: Part 1 and Part 2: Pre-dose and post-dose at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, 16, 24, 48, 72 (Day 4), 120 (Day 6), 192 (Day 9), and 336 (Day 15 Follow-up Visit) hours. Part 3: Pre-dose and post-dose at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, 16 and 24 hours.
AUC(0-last) was computed for MT-6345 for the PKPOP subjects in Part 1 and Part 2, and on Day 1 in Part 3.
Part 1 and Part 2: Pre-dose and post-dose at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, 16, 24, 48, 72 (Day 4), 120 (Day 6), 192 (Day 9), and 336 (Day 15 Follow-up Visit) hours. Part 3: Pre-dose and post-dose at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, 16 and 24 hours.
Area Under the Plasma Concentration-time Curve From Time Zero to Infinity (AUC0-∞) of MT-6345
Time Frame: Part 1 and Part 2: Pre-dose and post-dose at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, 16, 24, 48, 72 (Day 4), 120 (Day 6), 192 (Day 9), and 336 (Day 15 Follow-up Visit) hour. Part 3: Pre-dose and post-dose at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, 16 and 24 hours.
AUC(0-∞) was calculated for the PKPOP subjects in Part 1 and Part 2, and on Day 1 in Part 3.
Part 1 and Part 2: Pre-dose and post-dose at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, 16, 24, 48, 72 (Day 4), 120 (Day 6), 192 (Day 9), and 336 (Day 15 Follow-up Visit) hour. Part 3: Pre-dose and post-dose at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, 16 and 24 hours.
Terminal Elimination Rate Constant (Kel) of MT-6345
Time Frame: Part 1 and Part 2: Pre-dose and post-dose at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, 16, 24, 48, 72 (Day 4), 120 (Day 6), 192 (Day 9), and 336 (Day 15 Follow-up Visit) hours. Part 3: Pre-dose and post-dose at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, 16 and 24 hours.
Kel was estimated for the PKPOP subjects in Part 1 and Part 2, and on Day 1 in Part 3.
Part 1 and Part 2: Pre-dose and post-dose at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, 16, 24, 48, 72 (Day 4), 120 (Day 6), 192 (Day 9), and 336 (Day 15 Follow-up Visit) hours. Part 3: Pre-dose and post-dose at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, 16 and 24 hours.
Mean Residence Time (MRT) of MT-6345
Time Frame: Part 1 and Part 2: Pre-dose and post-dose at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, 16, 24, 48, 72 (Day 4), 120 (Day 6), 192 (Day 9), and 336 (Day 15 Follow-up Visit) hours. Part 3: Pre-dose and post-dose at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, 16 and 24 hours.
MRT was calculated for the PKPOP subjects in Part 1 and Part 2, and on Day 1 in Part 3.
Part 1 and Part 2: Pre-dose and post-dose at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, 16, 24, 48, 72 (Day 4), 120 (Day 6), 192 (Day 9), and 336 (Day 15 Follow-up Visit) hours. Part 3: Pre-dose and post-dose at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, 16 and 24 hours.
Apparent Oral Clearance (CL/F) of MT-6345
Time Frame: Part 1 and Part 2: Pre-dose and post-dose at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, 16, 24, 48, 72 (Day 4), 120 (Day 6), 192 (Day 9), and 336 (Day 15 Follow-up Visit) hours. Part 3: Pre-dose and post-dose at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, 16 and 24 hours.
CL/F was measured for MT-6345 in the PKPOP subjects of Part 1 and Part 2, and on Day 1 in Part 3.
Part 1 and Part 2: Pre-dose and post-dose at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, 16, 24, 48, 72 (Day 4), 120 (Day 6), 192 (Day 9), and 336 (Day 15 Follow-up Visit) hours. Part 3: Pre-dose and post-dose at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, 16 and 24 hours.
Area Under the Plasma Concentration Time Curve Over the Dosing Interval (AUC0-t) of MT-6345.
Time Frame: up to 2 weeks after dosing
up to 2 weeks after dosing
Apparent Volume of Distribution at Steady State (Vss/F) of MT-6345
Time Frame: Part 1 and Part 2: Pre-dose and post-dose at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, 16, 24, 48, 72 (Day 4), 120 (Day 6), 192 (Day 9), and 336 (Day 15 Follow-up Visit) hours. Part 3: Pre-dose and post-dose at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, 16 and 24 hours.
Vss/F was measured for MT-6345 in the PKPOP subjects of Part 1 and Part 2, and on Day 1 in Part 3.
Part 1 and Part 2: Pre-dose and post-dose at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, 16, 24, 48, 72 (Day 4), 120 (Day 6), 192 (Day 9), and 336 (Day 15 Follow-up Visit) hours. Part 3: Pre-dose and post-dose at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, 16 and 24 hours.
Linearity Factor (LF) of MT-6345
Time Frame: up to 2 weeks after dosing
up to 2 weeks after dosing
Accumulation Ratio (RA) of MT-6345
Time Frame: up to 2 weeks after dosing
up to 2 weeks after dosing
Urinary Excreted Amount of Test Compound (Ae) of MT-6345
Time Frame: Day 1 (0 hours to 24 hours) and Day 10 (0 hours to 24 hours)
Ae was measured for MT-6345 for the PKPOP subjects in Part 3.
Day 1 (0 hours to 24 hours) and Day 10 (0 hours to 24 hours)
Urinary Excreted Amount of Test Compound Expressed as a Percentage of the Dose Administered (Ae%) of MT-6345
Time Frame: Day 1 (pre-dose and post-dose at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12 and 16 hours) and Day 2 to Day 10 (pre-dose on each day)
Ae% was measured for MT-6345 for the PKPOP subjects in Part 3.
Day 1 (pre-dose and post-dose at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12 and 16 hours) and Day 2 to Day 10 (pre-dose on each day)
Renal Clearance (CLR) of MT-6345
Time Frame: Day 1 (0 hours to 24 hours) and Day 10 (0 hours to 24 hours)
CLR was measured for MT-6345 for the PKPOP subjects in Part 3. For Day 10, CLR was not calculated because AUC(0-24h) on the last day of dosing was not calculated.
Day 1 (0 hours to 24 hours) and Day 10 (0 hours to 24 hours)

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.
Tanabe Pharma America, Inc.

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Study Director: Head of Medical Science,, Tanabe Pharma America, 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.
January 15, 2019

Primary Completion (Actual)

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.
July 1, 2019

Study Completion (Actual)

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.
July 1, 2020

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).
January 16, 2019

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.
January 16, 2019

First Posted (Actual)

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.
January 18, 2019

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.
December 31, 2025

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.
December 12, 2025

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.
December 1, 2025

More Information

Terms related to this study

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.
  • MT-6345-E01
  • 2018-002478-39 (EudraCT Number)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

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.

Clinical Trials on Healthy

Clinical Trials on MT-6345

Search Similar Trials

Sponsors and Collaborators

Medical Conditions

Drug Interventions

Conditions

Rare Diseases

Drug Interventions

Dietary Supplements

Sponsor/Collaborators

Locations

Cookie Settings

We use cookies to ensure that we give you the best experience on our website. For more details carefully read our Privacy and Cookies Policy. ...>>>You can change your preferences or withdraw your consent at any time by deleting the cookies from your website or computer as described in the policy. Please accept it and choose your preferences by ticking the corresponding boxes in the "Manage Settings" section below. Please carefully read our Terms of Service before you proceed with using any part of this website.
«Manage Settings