OMT-28 in Patients With Primary Mitochondrial Disease (PMD) (PMD-OPTION) (PMD-OPTION)

A Phase 2a Safety, Tolerability, and Pharmacodynamic Study of OMT-28 in PMD Patients With Myopathy and/or Cardiomyopathy and Inflammation (PMD-OPTION)

The goal of this clinical trial is to learn about the treatment effects of the investigational new drug OMT-28 in patients with Primary Mitochondrial Disease.

The main question[s] it aims to answer are:

• Is OMT-28 safe and well tolerated in this patient population?
• Does OMT-28 reduce Growth Differentiation Factor 15 (GDF-15) and other relevant blood markers of mitochondrial dysfunction and inflammation?
• Does OMT-28 improve symptoms of the disease, e.g. fatigue or exercise intolerance?

Participants will be asked to participate in 6 study visits at an experienced clinical center, including physical examinations and exercise tests, and take the study medication regularly once per day according to the protocol.

Researchers will compare for every participant the results after 3 months and 6 months of treatment with a preceding 3 month period of standard care treatment to investigate the effects of OMT-28 on clinical parameters and a number of blood parameters.

Study Overview

• Status: Completed
• Conditions: Primary Mitochondrial Disease
• Intervention / Treatment: Drug: OMT-28

Detailed Description

This is an open label, single-arm, multiple-phase and multicenter Phase 2a study to evaluate the efficacy, safety, and pharmacokinetics of a single OMT-28 dose (24 mg given once daily) in patients with Primary Mitochondrial Disease and clinical manifestation of myopathy and/or cardiomyopathy.

Patients are eligible if they have

• Primary Mitochondrial Disease with a documented mitochondrial transfer ribonucleic acid (tRNA) point mutation, including m3243A>G, m8344A>G, or single mitochondrial DNA (mtDNA) deletions,
• a clinically relevant myopathy and/or cardiomyopathy confirmed following standard guidelines,
• a blood plasma GDF-15 concentration > 1200 ng/L and < 10.000 ng/L at screening

Participation in the study is divided into 3 parts:

• Screening and baseline: 12 weeks
• Treatment: 24 weeks
• Safety follow-up: 4 weeks

Total duration: 40 weeks

Safety will be monitored throughout the study. Blood samples for safety, pharmacodynamics and pharmacokinetics will be collected at every of the 6 study visits. Exercise tests (6/12-minutes walking test, 5xSST), transthoracic echocardiography, patient reported outcomes (e.g. Fatigue Severity Scale and Patients' Global Impression of Change (PGIC) scale) will be assessed at prespecified visits. Patients will be provided with a diary to record timing of drug administration and clinical symptoms while not on site. Diaries will be reviewed and checked for compliance at each non-resident visit to the clinical site.

• Study Type: Interventional
• Enrollment (Actual): 28
• Phase: Phase 2

Contacts and Locations

Study Locations

• Germany
  • Bonn, Germany, 53127
    • Universitätsklinikum Bonn, Sektion Neuromuskuläre Erkrankungen, Klinik und Poliklinik für Neurologie, Venusberg-Campus 1, Gebäude 80, NPP
  • Halle, Germany, 06120
    • Medizinisch Fakultät der Martin-Luther-Universität Halle-Wittenberg Universitätsklinik und Poliklinik für Neurologie Universitätsklinikum , Ernst-Grube-Str. 40
  • Munich, Germany, 80336
    • Friedrich-Baur-Institut an der Neurologischen Klinik und Poliklinik, Klinikum der Universität München, Ludwig-Maximilians-Universität (LMU Klinikum), Ziemssenstr. 1a
• Italy
  • Bologna, Italy, 40139
    • IRCCS Institute of Neurological Science of Bologna, University of Bologna, Department of Biomedical and Neuromotor Science (DIBINEM), Ospedale Bellaria Via Altura, 3
  • Messina, Italy, 98125
    • U.O.C. di Neurologia e Malattie Neuromuscolari
  • Milan, Italy, 20133
    • IRCCS Istituto Neurologico Carlo Besta, SC Servizio Di Medicina Di Laboratorio - Genetica Medica E Neurogenetica, Via Celoria 11
  • Pisa, Italy, 56126
    • Azienda Ospedaliero Universitaria Pisana, P.O. Santa Chiara, U.O. Neurologia, Edificio 13, Via Roma 67
  • Roma, Italy, 8-00168
    • UOC di neurofisiopatologia
• Netherlands
  • Gelderland
    • Nijmegen, Gelderland, Netherlands, 6500 HB
      • Radboud University Nijmegen Medical Centre

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

1. Documented mutation resulting in mitochondrial disease: mitochondrial tRNA point mutations, including m3243A>G, m8344A>G, and single mtDNA deletions
2. Diagnosis of Cardiomyopathy defined as LV hypertrophy and/or LVEF<50% and/or late gadolinium enhancement on cardiac MRI and/or Myopathy as defined by the International Workshop: Outcome measures and clinical trial readiness in primary mitochondrial myopathies in children and adult (Mancuso et al. 2017[8])
3. GDF-15 between 1,200 ng/L and 10,000 ng/L at screening
4. Ability to perform the exercise tests

6. Willing and able to provide a signed Informed Consent, as well as written documentation in accordance with country and local privacy requirements, e.g., written data protection consent 7. Able and willing to comply with the requirements of this study protocol 8. Both female patients, as well as, female partners of male patients who are of child-bearing potential must be willing to not become pregnant for the complete duration of the study (30 days after the last dose of study medication).

Exclusion Criteria:

1. Pregnant, breastfeeding, or unwilling to practice birth control during participation in the study
2. Presence of a condition or abnormality that in the opinion of the Investigator would compromise the safety of the patient or the quality of the data
3. Subjects with a history of cancer in the last 5 years
4. Hypertension defined as systolic BP >160 mmHg or diastolic BP >100 mmHg at screening
5. Uncontrolled Diabetes mellitus according to investigator's assessment
6. Stroke-like episodes or seizures occurred within last 6 months
7. Motoric abnormalities other than related to the mitochondrial disease interfering with the outcome parameters
8. History or evidence of active tuberculosis (TB) infection, any co-disease with inflammatory condition (e.g., Inflammatory Bowel Disease (IBD) etc.)
9. Patients with a positive hepatitis panel and/or positive immunodeficiency virus test at screening
10. Regular use of steroid, non-steroidal anti-inflammatory drug (NSAID), or colchicine within 30 days before screening
11. Chronic use of Metformin
12. Use of fish oil / omega-3 fatty acid supplements within two weeks before screening
13. Drinking more than 9 standard cups of alcohol per week and/or more than 3 standard cups of alcohol per occasion
14. Positive drug and alcohol screen (including opiates, methadone, cocaine, amphetamines [including ecstasy], cannabinoids, barbiturates, benzodiazepines)
15. Any significant hepatic disease
16. Receiving any investigational therapy or any approved therapy for investigational use within 30 days or 5 half-lives prior to screening (whichever is longer)
17. Received any vaccines (including the booster vaccination for COVID-19) within two weeks prior to Visit 1
18. Females of childbearing potential (those who are not surgically sterilized or post-menopausal for at least 1 year) are excluded from participation in the study unless they agree to use adequate contraception as described in Appendix 11.4
19. Males (including sterilized subjects) and whose female partners have child-bearing potential, must agree to use male contraception (condoms) during the period from the time of signing the informed consent form (ICF) through 30 days after the last dose of study drug. They must agree to immediately inform the investigator if his partner becomes pregnant during the study
20. Subjects who have previously been exposed to OMT-28, whether responder or non-responder.
21. Any use of statins (HMG-CoA reductase inhibitors)
22. Use of quinine, tacrolimus, mycophenolate mofetil, ciclosporin, serotine receptor-type 1 agonist, penicillin G, penicillamine (d-penicillamine), nicotinic acid (niacin), colchicine, isotretinoin, and amiodarone, peroxisome proliferator-activated receptor (PPAR) activators, AMP-activated protein kinase (AMPK) activators, sirtuin activators, steroids, cyclooxygenase inhibitors.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Treatment with OMT-28; 24mg OMT-28, oral capsule, for 12 weeks	Drug: OMT-28; once daily

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Responder rate	Number of patients (responder rate) with a between phase difference in GDF-15 of at least 20% decrease	12 weeks treatment vs. 12 weeks baseline
Number of Treatment Emergent Adverse Events (TEAE)	Compare the number of TEAEs during and between evaluation phases	up to 28 weeks

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Change in plasma concentration of GDF-15 [ng/L]	GDF-15 plasma concentration during evaluation phases, change in GDF-15 concentration during evaluations phases and comparison of GDF-15 concentration between evaluation phases	12 weeks treatment vs. 12 weeks baseline
Pharmacokinetics: Ctrough [ng/ml]	Trough plasma concentrations (Ctrough) of OMT-28	weeks 12, 16, 24 and 28
Pharmacokinetics: Cmax [ng/ml]	Plasma concentration of OMT-28 approximately at Cmax and one further timepoint after single dose	week 12 and week 24
Responder rate	Number of patients (responder rate) with a between phase difference in GDF-15 of at least 20%	24 weeks treatment vs. 12 weeks baseline

Collaborators and Investigators

• Sponsor: Omeicos Therapeutics GmbH
• Investigators: Study Director: Robert Fischer, MD, Omeicos Therapeutics GmbH

Study record dates

Study Major Dates

• Study Start (Actual): May 22, 2023
• Primary Completion (Actual): May 14, 2025
• Study Completion (Actual): July 30, 2025

Study Registration Dates

• First Submitted: June 27, 2023
• First Submitted That Met QC Criteria: July 25, 2023
• First Posted (Actual): August 2, 2023

Study Record Updates

• Last Update Posted (Actual): January 22, 2026
• Last Update Submitted That Met QC Criteria: January 20, 2026
• Last Verified: June 1, 2025

More Information

Terms related to this study

• Keywords: Cardiomyopathy; Myopathy; GDF-15; Mitochondrial encephalopathy, lactic acidosis and stroke-like episodes (MELAS) syndrome; Myoclonic epilepsy with ragged red fibers (MERRF); Maternally inherited diabetes and deafness (MIDD) syndrome
• Additional Relevant MeSH Terms: Epileptic Syndromes; Neurologic Manifestations; Musculoskeletal Diseases; Cerebrovascular Disorders; Brain Diseases; Central Nervous System Diseases; Nervous System Diseases; Vascular Diseases; Cardiovascular Diseases; Pathologic Processes; Heart Diseases; Neuromuscular Diseases; Metabolism, Inborn Errors; Genetic Diseases, Inborn; Metabolic Diseases; Disease; Otorhinolaryngologic Diseases; Sensation Disorders; Myoclonic Epilepsies, Progressive; Epilepsies, Myoclonic; Epilepsy, Generalized; Epilepsy; Ear Diseases; Brain Diseases, Metabolic, Inborn; Brain Diseases, Metabolic; Hearing Loss; Hearing Disorders; Mitochondrial Diseases; Acid-Base Imbalance; Cerebral Small Vessel Diseases; Acidosis; Mitochondrial Encephalomyopathies; Mitochondrial Myopathies; Congenital, Hereditary, and Neonatal Diseases and Abnormalities; Pathological Conditions, Signs and Symptoms; Nutritional and Metabolic Diseases; Signs and Symptoms; Syndrome; Cardiomyopathies; Muscular Diseases; Deafness; MELAS Syndrome; Acidosis, Lactic; MERRF Syndrome; Mitochondrial encephalopathy; Noninsulin-dependent diabetes mellitus with deafness
• Other Study ID Numbers: OMT28-C0203

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No