Primary Mitochondrial MyopathiesNHPMMNCT05653544
Natural History in Primary Mitochondrial Myopathies
An observational study of Primary Mitochondrial Myopathies, run by Cristina Domínguez González at 1 site in Spain.
Trial summary
This is a longitudinal study in a cohort of patients with a genetic diagnosis of Primary Mitochondrial Myopathy to describe the natural history of the disease and identify clinical, biochemical, molecular, and radiological variables that allow evaluation of the severity and progression of the disease and may be useful… Read more about this study
- Who is it for?
- Ages 16 years and older
- Conditions the study is for
- Primary Mitochondrial Myopathies
- How many people
- 150 participants
- Where
- 1 siteSpain
- Study dates
- 1 Jan 2023to 31 Dec 2026
- How long will I take part?
- 3 Years
- Phase
- Observational
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 16 years and older
- All sexes
- No healthy volunteers
- Child, Adult, Older adult
Study population: Patients with Primary Mitochondrial Myopathy with a genetic diagnosis
Who may be able to join
- Muscle symptoms: exercise intolerance and fatigue, myalgia, recurrent rhabdomyolysis, chronic progressive external ophthalmoplegia and/or muscular weakness
- Primary mtDNA mutation or pathogenic mutations in nDNA, especially in genes related to mtDNA maintenance such as TK2, POLG, TWNK and RRM2B, among others.
Who cannot join
- None
Trial locations and contacts
1 site in 1 country. Contact the study team or a site near you to ask about taking part.
Spain1 site, 1 recruiting
- Recruiting
Hospital Universitario 12 Octubre
Madrid, Madrid, 28041
Cristina Domínguez González, PhD, 913 90 80 00 ext. 4582, cdgonzalez@salud.madrid.org
About this study
Official title: Natural History and Longitudinal Clinical Assessments in a Spanish Cohort of Primary Mitochondrial Myopathies
This is a longitudinal study in a cohort of patients with a genetic diagnosis of Primary Mitochondrial Myopathy to describe the natural history of the disease and identify clinical, biochemical, molecular, and radiological variables that allow evaluation of the severity and progression of the disease and may be useful in future clinical trials.
Read the detailed description
Mitochondrial Diseases (MD) are among the most frequent inherited metabolic diseases. Despite their high impact on patients, there are still no authorized drugs capable of modifying their clinical course. MD are clinically and genetically heterogeneous disorders, with muscular symptoms being one of their main manifestations. When muscular symptoms predominate, the disorder is classified as a Primary Mitochondrial Myopathy. In recent years, there have been significant advances in developing potential new treatments in this field. However, the absence of natural history studies makes the design and interpretation of clinical trials difficult and leads to long delays or even failures in the development of new treatments. The investigators propose to characterize in-depth a cohort of patients with Primary Mitochondrial Disorders due to mutations in the mitochondrial DNA (mtDNA) or in genes located in the nuclear genome (nDNA), from a clinical perspective but also a radiological, biochemical, and molecular point of view, and carry out a longitudinal follow-up of these parameters to identify those that are better correlated with severity and that allow measuring changes in the patient's clinical situation. With this objective, the investigators will analyze clinical variables (evaluation of motor function through manual force exploration, functional scales, and timed test, quality of life scales, serum biomarkers (growth differentiation factor 15 (GDF15) and fibroblast growth factor 21 (FGF21)), levels of heteroplasmy for cases harboring mtDNA mutations and mtDNA copy-number, and muscle magnetic resonance image of the lower extremities with quantification of fat replacement. All parameters will be evaluated at the beginning of the study and then annually during two years of follow-up.
- Conditions
- Primary Mitochondrial Myopathies
- Keywords
- mtDNA, TK2, large scale single deletion, multiple deletions, POLG, TWNK
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
| Study group | Role | What they receive |
|---|---|---|
| Mitochondrial myopathy | Mitochondrial myopathy, confirmed genetically |
What is being measured
The primary outcome is the main question the study is designed to answer.
Motor Function (endurance)
6 minute walking test (6MWT)
Measured: 36 months
Secondary outcomes (4)
Motor Function (functional scale)
North Star Ambulatory Assessment (NSAA)
Measured: 36 months
Biomarkers
Analysis of levels of GDF15 y FGF21 annually
Measured: 36 months
Levels of heteroplasmy
Analysis of levels of heteroplasmy annually
Measured: 36 months
Muscle magenitc resonance image (MRI)
Quantification of the fat fraction in muscle MRI, annually
Measured: 36 months
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted16 Dec 2022
- Study start1 Jan 2023
- Primary completion1 Jun 2026 (estimated)
- Study completion31 Dec 2026 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (4)Papers the sponsor has linked to this study.
- Other trials for Primary Mitochondrial MyopathiesStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Cohort
- Time perspective
- Prospective
- Enrolment
- 150 participants (estimated)
- Target duration
- 3 Years
Sponsor and investigators
- Lead sponsor
- Cristina Domínguez González
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor-investigator, Cristina Domínguez González, Hospital Universitario 12 de Octubre
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT05653544
- Sponsor's protocol ID
- 22/493
- Acronym
- NHPMM
- Status last verified
- Sep 2025
- First submitted
- 29 Nov 2022
- Last updated
- 16 Sep 2025
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Publications
Dominguez-Gonzalez C, Hernandez-Voth A, de Fuenmayor-Fernandez de la Hoz CP, Guerrero LB, Moris G, Garcia-Garcia J, Muelas N, Leon Hernandez JC, Rabasa M, Lora D, Blazquez A, Arenas J, Martin MA. Metrics of progression and prognosis in untreated adults with thymidine kinase 2 deficiency: An observational study. Neuromuscul Disord. 2022 Sep;32(9):728-735. doi: 10.1016/j.nmd.2022.07.399. Epub 2022 Jul 16.
PubMed 35907766Dominguez-Gonzalez C, Fernandez-Torron R, Moore U, de Fuenmayor-Fernandez de la Hoz CP, Velez-Gomez B, Cabezas JA, Alonso-Perez J, Gonzalez-Mera L, Olive M, Garcia-Garcia J, Moris G, Leon Hernandez JC, Muelas N, Servian-Morilla E, Martin MA, Diaz-Manera J, Paradas C. Muscle MRI characteristic pattern for late-onset TK2 deficiency diagnosis. J Neurol. 2022 Jul;269(7):3550-3562. doi: 10.1007/s00415-021-10957-0. Epub 2022 Mar 14.
PubMed 35286480Bermejo-Guerrero L, de Fuenmayor-Fernandez de la Hoz CP, Serrano-Lorenzo P, Blazquez-Encinar A, Gutierrez-Gutierrez G, Martinez-Vicente L, Galan-Davila L, Garcia-Garcia J, Arenas J, Muelas N, Hernandez-Lain A, Dominguez-Gonzalez C, Martin MA. Clinical, Histological, and Genetic Features of 25 Patients with Autosomal Dominant Progressive External Ophthalmoplegia (ad-PEO)/PEO-Plus Due to TWNK Mutations. J Clin Med. 2021 Dec 22;11(1):22. doi: 10.3390/jcm11010022.
PubMed 35011763Rodriguez-Lopez C, Garcia-Cardaba LM, Blazquez A, Serrano-Lorenzo P, Gutierrez-Gutierrez G, San Millan-Tejado B, Muelas N, Hernandez-Lain A, Vilchez JJ, Gutierrez-Rivas E, Arenas J, Martin MA, Dominguez-Gonzalez C. Clinical, pathological and genetic spectrum in 89 cases of mitochondrial progressive external ophthalmoplegia. J Med Genet. 2020 Sep;57(9):643-646. doi: 10.1136/jmedgenet-2019-106649. Epub 2020 Mar 11.
PubMed 32161153
Study at a glance
From the registry record, last updated by the sponsor on 16 Sep 2025. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Natural History and Longitudinal Clinical Assessments in a Spanish Cohort of Primary Mitochondrial Myopathies
- ClinicalTrials.gov ID
- NCT05653544
- Acronym / sponsor ID
- NHPMM / 22/493
- Conditions
- Primary Mitochondrial Myopathies
- Keywords
- mtDNA, TK2, large scale single deletion, multiple deletions, POLG, TWNK
- Study type
- Observational
- Recruitment status
- Recruiting
- Enrolment
- 150 participants (estimated)
- Lead sponsor
- Cristina Domínguez GonzálezUniversity, hospital or other
- Study start
- 1 Jan 2023 (actual)
- Primary completion
- 1 Jun 2026 (estimated)
- Study completion
- 31 Dec 2026 (estimated)
- First posted
- 16 Dec 2022 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This is a longitudinal study in a cohort of patients with a genetic diagnosis of Primary Mitochondrial Myopathy to describe the natural history of the disease and identify clinical, biochemical, molecular, and radiological variables that allow evaluation of the severity and progression of the disease and may be useful in future clinical trials.
Detailed description
Mitochondrial Diseases (MD) are among the most frequent inherited metabolic diseases. Despite their high impact on patients, there are still no authorized drugs capable of modifying their clinical course. MD are clinically and genetically heterogeneous disorders, with muscular symptoms being one of their main manifestations. When muscular symptoms predominate, the disorder is classified as a Primary Mitochondrial Myopathy. In recent years, there have been significant advances in developing potential new treatments in this field. However, the absence of natural history studies makes the design and interpretation of clinical trials difficult and leads to long delays or even failures in the development of new treatments. The investigators propose to characterize in-depth a cohort of patients with Primary Mitochondrial Disorders due to mutations in the mitochondrial DNA (mtDNA) or in genes located in the nuclear genome (nDNA), from a clinical perspective but also a radiological, biochemical, and molecular point of view, and carry out a longitudinal follow-up of these parameters to identify those that are better correlated with severity and that allow measuring changes in the patient's clinical situation. With this objective, the investigators will analyze clinical variables (evaluation of motor function through manual force exploration, functional scales, and timed test, quality of life scales, serum biomarkers (growth differentiation factor 15 (GDF15) and fibroblast growth factor 21 (FGF21)), levels of heteroplasmy for cases harboring mtDNA mutations and mtDNA copy-number, and muscle magnetic resonance image of the lower extremities with quantification of fat replacement. All parameters will be evaluated at the beginning of the study and then annually during two years of follow-up.
Study design
- Observational model
- Cohort
- Time perspective
- Prospective
- Target follow-up
- 3 Years
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Mitochondrial myopathy | – | –Mitochondrial myopathy, confirmed genetically |
Who may qualify
- Ages
- 16 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Child, Adult, Older adult
- Study population
- Patients with Primary Mitochondrial Myopathy with a genetic diagnosis
Key inclusion criteria (2 listed)
- Muscle symptoms: exercise intolerance and fatigue, myalgia, recurrent rhabdomyolysis, chronic progressive external ophthalmoplegia and/or muscular weakness
- Primary mtDNA mutation or pathogenic mutations in nDNA, especially in genes related to mtDNA maintenance such as TK2, POLG, TWNK and RRM2B, among others.
Key exclusion criteria (1 listed)
- None
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Primary outcome
Motor Function (endurance)
Time frame: 36 months
6 minute walking test (6MWT)
4 secondary outcomes
Motor Function (functional scale)
Time frame: 36 months
Biomarkers
Time frame: 36 months
Levels of heteroplasmy
Time frame: 36 months
Muscle magenitc resonance image (MRI)
Time frame: 36 months
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 16 Sep 2025.
- Background: PubMed 35907766Dominguez-Gonzalez C, Hernandez-Voth A, de Fuenmayor-Fernandez de la Hoz CP, Guerrero LB, Moris G, Garcia-Garcia J, Muelas N, Leon Hernandez JC, Rabasa M, Lora D, Blazquez A, Arenas J, Martin MA. Metrics of progression and prognosis in untreated adults with thymidine kinase 2 deficiency: An observational study. Neuromuscul Disord. 2022 Sep;32(9):728-735. doi: 10.1016/j.nmd.2022.07.399. Epub 2022 Jul 16.
- Background: PubMed 35286480Dominguez-Gonzalez C, Fernandez-Torron R, Moore U, de Fuenmayor-Fernandez de la Hoz CP, Velez-Gomez B, Cabezas JA, Alonso-Perez J, Gonzalez-Mera L, Olive M, Garcia-Garcia J, Moris G, Leon Hernandez JC, Muelas N, Servian-Morilla E, Martin MA, Diaz-Manera J, Paradas C. Muscle MRI characteristic pattern for late-onset TK2 deficiency diagnosis. J Neurol. 2022 Jul;269(7):3550-3562. doi: 10.1007/s00415-021-10957-0. Epub 2022 Mar 14.
- Background: PubMed 35011763Bermejo-Guerrero L, de Fuenmayor-Fernandez de la Hoz CP, Serrano-Lorenzo P, Blazquez-Encinar A, Gutierrez-Gutierrez G, Martinez-Vicente L, Galan-Davila L, Garcia-Garcia J, Arenas J, Muelas N, Hernandez-Lain A, Dominguez-Gonzalez C, Martin MA. Clinical, Histological, and Genetic Features of 25 Patients with Autosomal Dominant Progressive External Ophthalmoplegia (ad-PEO)/PEO-Plus Due to TWNK Mutations. J Clin Med. 2021 Dec 22;11(1):22. doi: 10.3390/jcm11010022.
- Background: PubMed 32161153Rodriguez-Lopez C, Garcia-Cardaba LM, Blazquez A, Serrano-Lorenzo P, Gutierrez-Gutierrez G, San Millan-Tejado B, Muelas N, Hernandez-Lain A, Vilchez JJ, Gutierrez-Rivas E, Arenas J, Martin MA, Dominguez-Gonzalez C. Clinical, pathological and genetic spectrum in 89 cases of mitochondrial progressive external ophthalmoplegia. J Med Genet. 2020 Sep;57(9):643-646. doi: 10.1136/jmedgenet-2019-106649. Epub 2020 Mar 11.
- Individual participant dataSharing planned: No
Related trials for Primary Mitochondrial Myopathies
Active, not recruiting
Effects of Whole-body Electrical Muscle Stimulation Exercise on Adults With Neuromuscular Disease
Neuromuscular Diseases (NMD), Amyotrophic Lateral Sclerosis
RecruitingObservational study
Rare Disease Patient Registry & Natural History Study - Coordination of Rare Diseases at Sanford
Rare Disorders, Undiagnosed Disorders
RecruitingPhase 3
KHENERFIN Study: A Trial to Evaluate the Efficacy and Safety of Sonlicromanol in Primary Mitochondrial Diseases
Mitochondrial Diseases, Maternally Inherited Diabetes and Deafness (MIDD)
Not yet recruitingPhase 1/2
A Basket Clinical Study to Assess Glycerol Tributyrate in Patients With Mitochondrial Encephalopathy, Lactic Acidosis, Stroke-like Episodes (MELAS) or Leber's Hereditary Optic Neuropathy-Plus (LHON-Plus)
MELAS Syndrome, Lebers Hereditory Optic Neuropathy With Extra Ocular Symptoms (LHON-Plus)
Not yet recruitingObservational study
The Precision Mito- Mito Map COMPASS Study
Mitochondrial Diseases, Myalgic Encephalomyelitis Chronic Fatigue Syndrome
Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Primary Mitochondrial Myopathies, run by Cristina Domínguez González at 1 site in Spain.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 2 inclusion and 1 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: looking for participants now, as of the sponsor's last update on 16 Sep 2025. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Spain. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Contact Cristina Domínguez González, MD, PhD (+34917792582, Neuromuscular.hdoc@salud.madrid.org), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Motor Function (endurance) (time frame: 36 months). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT05653544, which also lists 4 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 16 Sep 2025.