- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT04697407
IL-2 Signaling and Polarization of Regulatory LBs: Involvement in Multiple Sclerosis (BREGS)
BREGS - IL-2 Signaling and Polarization of Regulatory LBs: Involvement in Multiple Sclerosis
Multiple sclerosis (MS) has long been considered a disease mediated primarily by CD4+ T cells. However, recent clinical trials demonstrating significant efficacy of B-lymphocyte depletive therapies have highlighted the major role of this cell population in the development of MS. Among B-Ls, regulatory ("anti-inflammatory") B-Ls (Bregs) have protective functions in autoimmune diseases including MS, however the mechanisms that regulate the development and function of Bregs are poorly characterized. In our research laboratory (INSERM UMR1236), one of the lines of research focuses on the role of interleukin-2 (IL-2) signaling in the fate of the B lymphocyte. Numerous studies conducted in both human and mouse models of MS demonstrate the major role of this IL-2/IL2R signaling pathway in the pathogenesis of autoimmune diseases.
The hypothesis is that IL-2/IL2R pathway could contribute, by a mechanism intrinsic to B lymphocytes, to the development of autoimmune diseases such as MS.
While a defect in IL-2 signaling plays a critical role in the pathogenesis of MS, the impact of this defective signaling on regulatory B lymphocyte populations, which has been shown to play a protective role in the development of the disease, has never been studied. This study could help establish a new mechanism predisposing patients to develop the disease.
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Multiple sclerosis (MS) is an autoimmune disease of the central nervous system (CNS) that is the leading cause of non-traumatic disability in young adults. Pathophysiopathologically, MS has long been considered a disease mediated primarily by CD4+ T cells. However, recent clinical trials demonstrating significant efficacy of B-lymphocyte (B-lymphocyte) depletive therapies have highlighted the major role of this cell population in the development of MS. Thus, it has been shown that these cells, in addition to their ability to secrete pathogenic antibodies, produce pro-inflammatory cytokines in this disease, and an imbalance between these potentially pathogenic pro-inflammatory B-Ls and regulatory ("anti-inflammatory") B-Ls (Bregs) has been suggested.
Bregs have protective functions in autoimmune diseases including MS, however the mechanisms that regulate the development and function of Bregs are poorly characterized. In our research laboratory (INSERM UMR1236), one of the lines of research focuses on the role of interleukin-2 (IL-2) signaling in the fate of the B lymphocyte. Our team has thus demonstrated that this cytokine, essentially produced by CD4+ T lymphocytes, triggers the differentiation of naïve human B cells in vitro into plasma cells. And, more recently, the analysis of the early response of BLs in mice disabled for the IL-2 receptor specifically in mature BLs (Il2rbfl/flCD19cre/+) suggests a role of IL-2 in the acquisition of suppressive/regulatory functions. In addition, numerous studies conducted in both human and mouse models of MS demonstrate the major role of this IL-2/IL2R signaling pathway in the pathogenesis of autoimmune diseases.
The hypothesis is that IL-2 signaling induces the polarization and/or regulatory function of Bregs in vivo and that deregulation of this IL-2/IL2R pathway could contribute, by a mechanism intrinsic to B lymphocytes, to the development of autoimmune diseases such as MS.
While a defect in IL-2 signaling plays a critical role in the pathogenesis of MS, the impact of this defective signaling on regulatory B lymphocyte populations, which has been shown to play a protective role in the development of the disease, has never been studied. This study could help establish a new mechanism predisposing patients to develop the disease.
The objective of this study is the analysis of the Bregs population in the blood of MS patients (at the diagnostic stage and in different forms) who are untreated compared to controls who are healthy in various aspects.
Study Type
Enrollment (Actual)
Phase
- Not Applicable
Contacts and Locations
Study Contact
- Name: Laure Michel, Md
- Phone Number: +33 2.99.28.43.21
- Email: laure.michel@chu-rennes.fr
Study Contact Backup
- Name: Marie-Laure Gervais, PhD
- Phone Number: +33 2.99.28.25.91
- Email: marie-laure.gervais@chu-rennes.fr
Study Locations
-
-
-
Rennes, France
- CHU Rennes
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Description
About the patients,Inclusion Criteria :
- Patients at the onset of illness :
- With a strong suspicion of MS requiring an LP to confirm the diagnosis (suggestive neurological symptoms AND more than two typical lesions on MRI) ; OR
- MS patients (untreated RR, SP or PP) :
- With MS that meets the MacDonald 2017 criteria;
- With relapsing-remitting (RR), secondary-progressive (SP) or primary-progressive (PP) MS; OR
- Non-MS patients :
- Presenting a non MS neurological inflammatory disease (meningitis, neurolupus, neurosarcoidosis, autoimmune encephalitis, acute polyradiculoneuritis);
- Benefiting from an LP for diagnostic or monitoring purposes;
AND
- At least 18 years old;
- Without immunomodulating or immunosuppressive background treatment for at least 3 months;
- Without systemic corticosteroid treatment for at least 3 months;
- Having signed a free, informed and written consent.
- Affiliated with a social security system
About healthy volunteers, inclusion criteria :
- At least 18 years old;
- Having signed a free, informed and written consent.
- Affiliated with a social security system
Exclusion Criteria:
For all groups
- Pregnancy ;
- Breastfeeding ;
- Persons of full age subject to legal protection (safeguard of justice, curatorship, guardianship), persons deprived of liberty.
Healthy volunteers :
- Absence of autoimmune pathologies
- Without immunomodulating or immunosuppressive background treatment for at least 3 months;
- Without systemic corticosteroid treatment for at least 3 months.
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Basic Science
- Allocation: Non-Randomized
- Interventional Model: Parallel Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Active Comparator: Healthy volunteers
|
In all groups, 80 ml of blood will be collected.
For patients, this will be done during routine cares.
|
Experimental: MS Patients
Patients with MS at any stage and for any type of MS : MS at the onset of the disease, Clinically isolated syndrome (CIS), Relapsing-remitting MS (RRMS), Primary progressive MS (PPMS), Secondary progressive MS (SPMS)
|
In all groups, 80 ml of blood will be collected.
For patients, this will be done during routine cares.
Only in both patients groups whom will have a CSF sampling in routine care, some CSF will be collected for the study in addition, with a limit of 5 ml for routine care and study.
|
Active Comparator: non MS Patients
Patients with a neurological and immunological disease except MS.
|
In all groups, 80 ml of blood will be collected.
For patients, this will be done during routine cares.
Only in both patients groups whom will have a CSF sampling in routine care, some CSF will be collected for the study in addition, with a limit of 5 ml for routine care and study.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Frequency of Bregs in blood of MS patients
Time Frame: 1 month
|
Comparison of the frequency of Bregs in the blood of untreated MS patients (at the diagnostic stage and in different forms of MS: Relapsing-remitting (RR), Primary Progressive (PP) and Secondary Progressive (SP)) compared to healthy controls matched for age and gender.
|
1 month
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Frequency of Bregs in the CSF of MS patients
Time Frame: 1 month
|
Comparison of the frequency of Bregs in the CSF of early MS patients to the frequency of Bregs in the CSF of patients with other non-MS inflammatory neurological diseases.
|
1 month
|
Comparison of IL-2, soluble IL2RA, IL-10, IL-21 and IL-5 protein concentrations
Time Frame: 1 month
|
Comparison of IL-2, soluble IL2RA, IL-10, IL-21 and IL-5 protein concentrations in blood and/or CSF of MS patients to protein concentration of patients with inflammatory neurological non MS disease and to protein concentration in blood of healthy volunteers
|
1 month
|
Comparison of the concentrations in Igs
Time Frame: 1 month
|
Comparison of the concentrations in immunoglobulins in blood and/or CSF of MS patients to protein concentration of patients with inflammatory neurological non MS disease and to immunoglobulin concentration in blood of healthy volunteers
|
1 month
|
Collaborators and Investigators
Sponsor
Investigators
- Principal Investigator: Laure Michel, Md, Rennes University Hospital
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- 35RC20_9867_BREGS
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
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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