Combination of Multiparametric MRI and Electrophysiology for the Development of New Biomarkers in Spinal Cord Diseases

Not Applicable

Completed

• Conditions: Spinal Cord Disease
• Interventions: Procedure: Combination of multiparametric MRI and electrophysiology

• Registration Number: NCT02885870
• Lead Sponsor: Institut de Recherche sur la Moelle épinière et l'Encéphale

Brief Summary

The spinal cord is a common site for the development of several neurodegenerative neurological disorders (spinal muscular atrophy or SMA, amyotrophic lateral sclerosis or ALS, X-linked spinal bulbar muscular atrophy or SBMA). In different proportions, these diseases involve axonal loss in large funiculi of the spinal white matter, their demyelination, and loss of ventral horn motor neurons or motoneurones of the spinal gray matter. The lack of specific biomarkers of these macro and microscopic spinal damages, makes it difficult the differential diagnosis and monitoring of these diseases.

Techniques to explore non-invasively the human central nervous system, such as magnetic resonance imaging (MRI) and electrophysiology, are potential tools to extract specific biomarkers of spinal damages. However, imaging techniques are still poorly developed at spinal level for technical (specific antennas), anatomical (size of the spinal cord, vertebrae) and physiological reasons (cardio-respiratory movements). However, recent advances in the field of spinal cord imaging allowed to extract quantitative data on neuron loss, axonal degeneration and demyelination in different spinal pathologies whether degenerative (ALS or SMA) or traumatic (SCI). Correlations were found with clinical data, and in ALS patients, the changes in MRI metrics over time paralleled the functional deterioration. The electrophysiological techniques are used since a long time, leading to a good knowledge of the neurophysiology of human spinal cord. In addition, electrophysiology indirectly provides data at a microscopic scale, providing information on the excitability of spinal neural networks and giving an estimate of the amount of functional neurons.

By combining these techniques for the investigation of human spinal cord in vivo, the goal is to extract new biomarkers using as study models, diseases of the spinal cord affecting differentially the white and the gray matter (SMA, SBMA and ALS).

At first, new methods of diffusion MRI and modelling will be performed in healthy subjects to assess the axonal density and diameter of the fibers in the white matter. The anatomical imaging T2 will measure the geometrical parameters of the spinal cord such as its surface and/or volume at a given vertebral level. Thanks to imaging, we will construct via methods of segmentation and image processing, an atlas of the spinal cord that will allow to locate spatially spinal atrophy in patients. After this phase of validation, A study of patients will be conducted using these new MRI techniques, in addition to those already developed in the laboratory. The contribution of electrophysiology will be to assess more accurately the microscopic damage. Quantitative data from imaging and electrophysiology will be correlated with clinical data in order to extract the most relevant biomarkers.

This project has thus a methodological interest by proposing the development of new methods to assess the human spinal cord, at both macro and microscopic levels. These methods are based on the development of the techniques developed at spinal level and which are already applicable to human pathologies. The original combination of imaging and electrophysiology will also enable us to further analyze the human spinal cord, both anatomically and functionally. This project has an important clinical value for the extraction of biomarkers in diseases where there is an unmet need for diagnosis, monitoring, prognosis and evaluation of new therapies.

Detailed Description

Not available

Study Timeline

• Study Start: 2016-04-18
• Study First Submitted: 2016-08-22
• Study First Submitted QC: 2016-08-31
• Study First Posted: 2016-09-01
• Primary Completion: 2019-02-27
• Study Completion: 2019-02-27
• Status Verified: 2021-01
• Last Update Submitted: 2021-01-10
• Last Update Posted: 2021-01-12

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 25

Inclusion Criteria

Not provided

Exclusion Criteria

Not provided

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Healthy subject	Combination of multiparametric MRI and electrophysiology	Subject without any neurologic or spine affection Subject matched for sex and age with patient arm
Patient	Combination of multiparametric MRI and electrophysiology	Patient with : * Spinal muscular atrophy (n=25) * X-linked spinobulbar muscular atrophy (n=25) * Amyotrophic lateral sclerosis (n=25)

Primary Outcome Measures

Name	Time	Method
Change in MRI from baseline to follow-up visit	Baseline, 6 months (amyotrophic lateral sclerosis patients) or 18 months (Spinal muscular atrophy and X-linked spinobulbar muscular atrophy patients)	Assessment of the human spinal cord, at both macro and microscopic levels. Specific biomarkers of white and grey matter degeneration.

Trial Locations

Locations (1)

La Pitie Salpetrieres; 🇫🇷 Paris, France