Circulating microRNAs as Biomarkers of RESPIratory Dysfunction in Patients With Refractory epilePSY (MIRESPILEPSY)

September 19, 2025 updated by: Hospices Civils de Lyon

Sudden and unexpected death in epilepsy (SUDEP) has become a major issue for patients with epilepsy and their physicians. SUDEP is a nontraumatic and non-drowning death in patients with epilepsy, unrelated to a documented status epilepticus, in which postmortem examination does not reveal a toxicologic or anatomic cause of death. It primarily affects young adults with drug-resistant epilepsy, with an incidence of about 0.5%/year. A recent study reported that up to 20% of patients with childhood onset drug resistant epilepsy will die of a SUDEP by the age of 45. Apart from optimizing antiepileptic drugs, no preventive treatment is available to prevent SUDEP. As underscored by the World Health Organization (WHO), there is an urgent need to develop specific therapeutic approaches to tackle this issue.

The primary objective of the proposal is to evaluate the diagnostic value of a set of circulating microRNAs pre-selected because of their implication in the regulation of molecular pathways involved in the respiratory regulation to identify patients with seizure-related respiratory dysfunction, as defined by occurrence ictal/peri-ictal pulse oxymetry < 90%.

A total of 50 patients will be included over a period of one year. Patients undergoing long-term video-EEG/SEEG monitoring will be recruited in the epilepsy monitoring unit of the Department of Functional Neurology and Epileptology, Hospices Civils de Lyon, Lyon, France.

It will be a case-control study in a cohort of patients with drug-resistant focal epilepsy undergoing long-term video-EEG monitoring, in which patients who demonstrate ictal/post-ictal hypoxemia (cases) will be compared with those without seizure-related respiratory dysfunction (controls).

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.

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.
75

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.
  • Not Applicable

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

  • France
      • Bron, France, 69500
        • Hospices Civils de Lyon
      • Marseille, France, 13005
        • Service de Neurophysiologie Clinique Hôpital La Timone

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 and older (Adult, Older Adult)

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria:

For the patients :

  • Adult patient (≥ 18 years) suffering from drug-resistant focal epilepsy or from drug-resistant generalized epilepsy according to ILAE classification
  • Patient undergoing long-term video-EEG monitoring in Epilepsy unit of Lyon to record and characterize her/his seizure
  • Patient who gave her/his written informed consent to participate to the study
  • Patient affiliated to the French health care system

For the healthy volunteers :

  • Adult (≥ 18 years)
  • Without history of neurological disorders and/or psychiatric disorders, and/or general medical disorders
  • Subject who gave her/his written informed consent to participate to the study
  • Subject affiliated to the French health care system

Exclusion Criteria:

For the patients :

  • Ongoing major depressive episode as defined by a score ≥ 15 at the French version of the NDDI-E scale*
  • Current panic disorder as defined by a score ≥ 7 at the French version of the GAD-7 scale*
  • Ongoing treatment with selective serotonin reuptake inhibitor
  • Patient who benefit from a protective measure

For the healthy volunteers :

  • Presence of the symptoms of anxiety and/or depression as defined by a score ≥ 11 at the French version of the Hospital Anxiety and Depression Scale (HADS)
  • Ongoing treatment with selective serotonin reuptake inhibitor
  • Subjects with these psychiatric comorbidities and/or treatment will be excluded in order to limit risk that the relation previously reported between miR-135a, miR-16, miR-1202 and depression and/or panic disorder and/or response to selective serotonin

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: Diagnostic
  • Allocation: Non-Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

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: Patient
Patients suffering from drug-resistant focal epilepsy or from drug-resistant generalized epilepsy according to ILAE classification and undergoing long-term video-EEG monitoring in Epilepsy unit of Lyon to record and characterize her/his seizure
Genetic: blood sample
Seven blood samples (4 ml each on 5 EDTA and 2 dry tubes) will be collected in each patient/ healthy volunteers subject to determine the expression profile of miRNAs in the plasma as well as in the exosomes
Active Comparator: healthy volunteers
Adult (≥ 18 years) Without history of neurological disorders and/or psychiatric disorders, and/or general medical disorders
Genetic: blood sample
Seven blood samples (4 ml each on 5 EDTA and 2 dry tubes) will be collected in each patient/ healthy volunteers subject to determine the expression profile of miRNAs in the plasma as well as in the exosomes

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
Relation between the expression level of circulating microRNAs and the occurrence of SpO2 <90% during at least 5 seconds within the course of the seizure and/or within the five minutes following the end of the seizure
Time Frame: Day 0
The primary objective of the proposal is to evaluate the diagnostic value of a set of circulating microRNAs pre-selected because of their implication in the regulation of molecular pathways involved in the respiratory regulation to identify patients with seizure-related respiratory dysfunction, as defined by occurrence ictal/peri-ictal pulse oxymetry < 90%
Day 0

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
Relation between the expression level of circulating microRNAs and the desaturation nadir
Time Frame: Day 0
Evaluating the relation between a set of circulating microRNAs and the severity of the seizure-related respiratory dysfunction, as defined by the desaturation nadir
Day 0
Relation between the expression level of circulating microRNAs and the patient's age
Time Frame: Day 0
Day 0
Relation between the expression level of circulating microRNAs and the epilepsy duration
Time Frame: Day 0
Day 0
Relation between the expression level of circulating microRNAs and the total number of seizures (ie focal seizures and GTCS) over the past three months
Time Frame: Day 0
Day 0
Relation between the expression level of circulating microRNAs and the Number of GTCS over the past three months
Time Frame: Day 0
Day 0

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.
Hospices Civils de Lyon

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.
  • Principal Investigator: Sylvain RHEIMS, Hospices Civils de Lyon

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.
March 16, 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.
March 31, 2022

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.
March 31, 2022

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 26, 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.
January 26, 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.
February 1, 2018

Study Record Updates

Last Update Posted (Estimated)

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.
September 24, 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.
September 19, 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.
April 1, 2022

More Information

Terms related to this study

Keywords

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.
  • 69HCL17_0666
  • 2017-A03307-46 (Other Identifier: ID-RCB)

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

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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