Mitochondrial Disease-associated ImmunoDeficiencies

NCT ID: NCT06213103

Last Updated: 2024-02-05

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

RECRUITING

Total Enrollment

60 participants

Study Classification

OBSERVATIONAL

Study Start Date

2024-01-30

Study Completion Date

2025-01-31

Brief Summary

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The study aims at characterizing the immune dysfunctions in patients with mitochondrial diseases. This has prognostic and diagnostic interest as well as potential for the discovery of new therapeutic strategies to alleviate disease burden.

Detailed Description

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Mitochondrial pathologies are rare genetic diseases, and affect about 1 in 4300 people. These pathologies are characterized by an energetic deficit that can affect all organs, and can manifest from birth to adulthood. The clinical expression is very heterogeneous, the symptoms can include encephalopathies, myopathies, cardiomyopathies, among others, with frequently "an illegitimate association of symptoms" that add up in a progressive way. These pathologies are related to the presence of pathogenic mutations in the genes of the nuclear genome involved in mitochondrial metabolism, or directly in the genes of the mitochondrial DNA (mtDNA).

The immune system dysfunctions associated with mitochondrial diseases remain unknown to date despite the presence of the deleterious variant in leukocytes. Recent studies by group of the investigators and others in animal models clearly show the importance of mitochondrial functions in the regulation of inflammatory and antimicrobial processes. These experimental data are particularly relevant in light of recent clinical studies indicating that patients with mitochondriopathies have a higher rate of bacterial infections compared to control individuals.

The investigators hypothesized that immunological parameters assessment in patients will reveal new dysfunctions associated with these pathologies and that some of these parameters will be a prognostic factor in these "step-like" progression of these diseases.

This study will recruit 30 patients with mitochondrial disorders followed in Bordeaux University Hospital and Toulouse University Hospital for who the mutation of mitochondrial DNA has been previously identified. Among classical disease activity information, blood samples will be collected to study immunological parameters. Translational research will be realized on patient' samples to assess immune cell subsets and innate immune cells functions.

Conditions

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Mitochondrial Disorders

Study Design

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Observational Model Type

COHORT

Study Time Perspective

PROSPECTIVE

Study Groups

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o Patient cohort

Patient with moleculary proven mitochondrial disorder

Patient cohort

Intervention Type PROCEDURE

Collection of 6 blood tubes at the inclusion visit.

o Control cohort

People without moleculary proven mitochondrial disorder

Control cohort

Intervention Type PROCEDURE

Collection of 6 blood tubes at the inclusion visit.

Interventions

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Patient cohort

Collection of 6 blood tubes at the inclusion visit.

Intervention Type PROCEDURE

Control cohort

Collection of 6 blood tubes at the inclusion visit.

Intervention Type PROCEDURE

Eligibility Criteria

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Inclusion Criteria

* Patient weighing more than 30kg
* Person affiliated with or receiving a social security plan;

* Patient with molecularly proven primary mitochondrial disease
* Free, informed, written consent signed by parental authority holders for minor patients and the investigator prior to any examination required by the research and oral and/or written assent by the participant (depending on age).
* Free, informed consent signed by the patient's representative for adult patients under guardianship and the investigator prior to any examination required by the research.
* Free, informed consent signed by the patient of legal age and the investigator prior to any examination required by the research

* Person who has been informed of the purpose of the study and person matched in age (+/- 5 years) and sex to a patient with primary mitochondrial disease at the time of sampling
* Free, informed, and signed consent
* Person with no known mitochondrial disease

Exclusion Criteria

* Pregnant or breastfeeding women
* Refusal to consent to participate in research,
* Patients for whom molecular causes have not been formally identified (genetic analyses not performed, or no variant or variant of unknown significance after analysis).
Minimum Eligible Age

6 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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University Hospital, Bordeaux

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Aurélien TRIMOUILLE, MD

Role: PRINCIPAL_INVESTIGATOR

University Hospital, Bordeaux

Locations

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Chu Bordeaux

Bordeaux, , France

Site Status RECRUITING

Hopital Toulouse

Toulouse, , France

Site Status NOT_YET_RECRUITING

Countries

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France

Central Contacts

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Aurélien TRIMOUILLE, MD

Role: CONTACT

+335 57 82 10 49

Johan Garaude, MD

Role: CONTACT

Facility Contacts

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Aurélien TRIMOUILLE, MD

Role: primary

Olivier PATAT, MD

Role: primary

Other Identifiers

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CHUBX 2022/36

Identifier Type: -

Identifier Source: org_study_id

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