Study to Evaluate Efficacy, Safety, and Tolerability of MT-7117 in Subjects With Erythropoietic Protoporphyria

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

A Phase II, Multicenter, Randomized, Double-Blind, Placebo-Controlled Study to Evaluate Efficacy, Safety, and Tolerability of MT-7117 in Subjects With Erythropoietic Protoporphyria

The purpose of this study is to investigate the efficacy and safety of MT-7117 on sunlight exposure duration without symptoms and tolerance in subjects with EPP.

Study Overview

Status

Status

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

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.

Detailed Description

This is a Phase 2, randomized, double-blind, placebo controlled study to assess the efficacy, tolerability, and safety of MT-7117 in subjects with EPP. The study consists of a 2 week screening period, a 16 week double-blind treatment period, and a 6 week follow-up period at Week 22. The total participation period is approximately 24 weeks.

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.
102

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

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

  • United States
    • California
      • Los Angeles, California, United States, 90036
        • ACTCA, A Member of the Alliance, Inc.
      • San Francisco, California, United States, 94143
        • University of California at San Francisco
    • Florida
      • Miami, Florida, United States, 33136
        • University of Miami Miller School of Medicine
    • Massachusetts
      • Brighton, Massachusetts, United States, 02135
        • Metro Boston Clinical Partners, LLC
    • New York
      • New York, New York, United States, 10029
        • Ichan School of Medicine at Mount Sinai
    • North Carolina
      • Winston-Salem, North Carolina, United States, 27157
        • Wake Forest Baptist Medical Center
    • Ohio
      • Columbus, Ohio, United States, 43215
        • Remington-Davis, Inc
    • Texas
      • Galveston, Texas, United States, 77555
        • University of Texas Medical Branch Porphyria Center
    • Utah
      • Salt Lake City, Utah, United States, 84108
        • University of Utah

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 75 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Description

Additional screening criteria check may apply for qualification.

Inclusion Criteria:

  • 1. Subjects provided written informed consent to participate.
  • 2. Male and female subjects with a confirmed diagnosis of EPP based on medical history, aged 18 years to 75 years, inclusive, at Screening.
  • 3. Subjects are willing and able to travel to the study sites for all scheduled visits.
  • 4. 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 (including travel).

Exclusion Criteria:

  • 1. History or presence of photodermatoses other than EPP.
  • 2. Subjects who are unwilling or unable to go outside during daylight hours (e.g., between 1 hour post sunrise and 1 hour pre-sunset) during the study.
  • 3. Presence of clinically significant hepatobiliary disease based on LFT values at Screening.
  • 4. Subjects with AST, ALT, ALP ≥3.0 × upper limit of normal (ULN) or total bilirubin >1.5 × ULN at Screening.
  • 5. Subjects with or having a history (in the last 2 years) of excessive alcohol intake in the opinion of the Investigator.
  • 6. History or presence of melanoma and/or atypical nevus at Screening.
  • 7. History of familial melanoma (defined as having 2 or more first-degree relatives, such as parents, sibling and/or child).
  • 8. History or presence of pre-malignant skin lesion squamous cell carcinoma, basal cell carcinoma, or other malignant skin lesions.
  • 9. History or presence of psychiatric disease judged to be clinically significant by the Investigator and which may interfere with the study evaluation and/or safety of the subjects.
  • 10. Presence of clinically significant acute or chronic renal disease based upon the subject's medical records including hemodialysis; and a serum creatinine level of greater than 1.2 mg/dL or a glomerular filtration rate (GFR) <60 ml/min.
  • 11. Presence of any clinically significant disease or laboratory abnormality which, in the opinion of the Investigator, can interfere with the study objectives and/or safety of the subjects.
  • 12. Pregnancy or lactation.
  • 13. Females of child bearing potential and male subjects with partners of child-bearing potential unwilling to use adequate contraception measures as described in the protocol.
  • 14. Treatment with phototherapy within 3 months before Randomization (Visit 2).
  • 15. Treatment with afamelanotide within 3 months before Randomization (Visit 2).
  • 16. Treatment with cimetidine within 4 weeks before Randomization (Visit 2).
  • 17. Treatment with antioxidant agents at doses which, in the opinion of the Investigator, may affect study endpoints (including but not limited to beta-carotene, cysteine, pyridoxine) within 4 weeks before Randomization (Visit 2).
  • 18. Chronic treatment with prescription-based analgesic agents including but not limited to opioids and opioid derivatives such as morphine, hydrocodone, oxycodone or their combination with other analgesics or non-steroidal anti-inflammatory drug (NSAID, as Percocet and Vicodin-like prescription drugs) within 4 weeks before Randomization (Visit 2).
  • 19. Treatment with any drugs or supplements which, in the opinion of the Investigator, can interfere with the objectives of the study or safety of the subjects.
  • 20. Previous exposure to MT 7117.
  • 21. Previous treatment with any investigational agent within 12 weeks before Screening OR 5 half-lives of the investigational product (whichever is longer).

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: Randomized
  • Interventional Model: Parallel 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.
Placebo Comparator: Placebo
Drug: Placebo
Placebo QD, oral, 16 weeks
Experimental: MT-7117 low dose
Drug: MT-7117 low dose
MT-7117 low dose QD, oral, 16 weeks
Experimental: MT-7117 high dose
Drug: MT-7117 high dose
MT-7117 high dose QD, oral, 16 weeks

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
Change From Baseline in Average Daily Time (Minutes) to First Prodromal Symptom Associated With Sunlight Exposure Between Hour Post Sunrise and 1 Hour Pre-Sunset at Week 16.
Time Frame: Baseline (Week 0) and Week 16
Duration in minutes, of sunlight exposure between 1 hour post sunrise and 1 hour pre-sunset. The average Duration in minutes, of sunlight exposure before the first prodromal symptom between 1 hour post sunrise and 1 hour pre-sunset. The average duration means that average of daily durations in 14-day windows before Day 1 (or week 16 Day) applied.
Baseline (Week 0) and Week 16
Change From Baseline in Average Daily Duration (Minutes) of Sunlight Exposure Between 1 Hour Post Sunrise and 1 Hour Pre-Sunset Without Prodromal Symptoms at Week 16
Time Frame: Baseline (Week 0), and Week 16
Change from baseline to week 16 in Average Daily Duration (Minutes) of Sunlight Exposure sums any sunlight exposure time excluding any overlapped time with prodromal symptoms, including if the patients go out multiple times on the same day after the prodromal symptom had previously ended.
Baseline (Week 0), and Week 16
Change From Baseline in Average Daily Mean Duration (Minutes) of Sunlight Exposure Between 1 Hour Post Sunrise and 1 Hour Pre-Sunset Without Prodromal Symptoms at Week 16
Time Frame: Baseline (Week 0), and Week 16
Change from baseline to week 16 in Average Daily Mean Duration (Minutes) of Sunlight Exposure without prodromal symptoms divided by the number of sunlight exposures periods applicable that day.
Baseline (Week 0), and Week 16

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
Total Number of Sunlight Exposure Episodes With Prodromal Symptoms During 16-Week Double-Blind Treatment Period
Time Frame: Week 16
Week 16
Change From Baseline in Average Daily Mean Intensity of Prodromal Symptoms During 16-week Double-blind Treatment Period in 11-point Likert Scale
Time Frame: Baseline (Week 0), and Week 16
The Intensity of Prodromal Symptoms is measured by 11-point Likert scale ranges from 0 (no symptom) to 10 (greatest severity of symptom).
Baseline (Week 0), and Week 16
Change From Baseline in Average Daily Duration (Minutes) of Prodromal Symptoms at 16-Week Double-Blind Treatment Period
Time Frame: Baseline (Week 0), and Week 16
Baseline (Week 0), and Week 16
Change From Baseline in Pigmentation as Measured by Melanin Density for Average of 6 Skin Segments at Week 8 and Week 16.
Time Frame: Baseline (Week 0), Week 8, and Week 16
Pigmentation will be assessed in melanin density which are numeric scores measured by spectrophotometer on 6 skin segments (forehead, left cheek, right inside upper arm, left medial forearm, right-hand side of abdomen, and left-hand side of buttock).
Baseline (Week 0), Week 8, and Week 16
Percent Change From Baseline in Pigmentation as Measured by Melanin Density for Average of 6 Skin Segments at Week 8 and Week 16.
Time Frame: Baseline (Week 0), Week 8, and Week 16
Baseline (Week 0), Week 8, and Week 16
Total Number of Pain Events During 16-Week Double-Blind Treatment Period
Time Frame: Week 16
Week 16

Other Outcome Measures

Other Outcome Measures

For clinical trials, a planned measurement described in the protocol that is used to determine the effect of an intervention/treatment on participants. For observational studies, a measurement or observation that is used to describe patterns of diseases or traits, or associations with exposures, risk factors, or treatment. Types of outcome measures include primary outcome measure and secondary outcome measure.
Outcome Measure
Time Frame
Total Number of Sunlight Exposure Episodes
Time Frame: Baseline (Week 0) and Week 16
Baseline (Week 0) and Week 16
Change in Pigmentation as Measured by Melanin Density
Time Frame: Baseline (Week 0) and Week 16
Baseline (Week 0) and Week 16
The Quality of Life as Measured by the Patient Reported Outcomes Measurement Information System (PROMIS) 57
Time Frame: Baseline (Week 0) and Week 16
Baseline (Week 0) and Week 16

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.

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

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.
July 5, 2018

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.
September 28, 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.
September 28, 2019

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).
April 23, 2018

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.
May 8, 2018

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.
May 9, 2018

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

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.
  • MT-7117-A01

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

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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