Eric Thouvenot

Eric Thouvenot
Centre Hospitalier Régional Universitaire de Nîmes · Department of Neurology

MD PhD

About

230
Publications
51,006
Reads
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4,558
Citations
Introduction
Eric Thouvenot is mainly involved in research of biomarkers of and using proteomics. He has implemented and adapted to CSF samples a powerful immunodepletion method to remove the 20 most abundant plasma proteins from CSF, allowing in-depth characterization of CSF proteome, including low-abundant proteins secreted by CNS cells, especially using SILAC to investigate the neuronal secretome. As a Neurologist, Eric Thouvenot is involved in MS and leads the MS clinic in Nîmes University Hospital. He got several grants from pharmaceutical companies and charities (ARSEP) dedicated to clinical and physiopathological studies in MS. He coordinates a national PHRC aimed at evaluating the clinical efficacy of Vitamin D to reduce conversion to MS after a clinically isolated syndrome in 316 patients.
Additional affiliations
September 2015 - present
Centre Hospitalier Régional Universitaire de Nîmes
Position
  • Professor (Full)
Description
  • Head of Neurology Department Multiple Sclerosis Clinics
May 2011 - present
French National Centre for Scientific Research
Position
  • Professor (Full)
November 2007 - May 2011
Centre Hospitalier Universitaire de Montpellier
Position
  • Professor (Assistant)
Education
November 2005 - October 2009
Institut de Génomique Fonctionnelle,
Field of study
  • Neuroscience
November 2000 - October 2005
Université de Montpellier
Field of study
  • Medecine
September 1996 - August 2000
Sorbonne Université
Field of study
  • Medecine

Publications

Publications (230)
Article
Background and objective Determining whether multiple sclerosis (MS) causes death is challenging. Our objective was to contrast two frameworks to estimate probabilities of death attributed to MS (P MS ) and to other causes (P Other ): the cause-specific framework (CSF) which requires the causes of death and the excess mortality framework (EMF) whic...
Preprint
Vitamin D deficiency is a recognized risk factor for multiple sclerosis (MS) and has been associated with disease activity and progression. Vitamin D treatment has emerged as potentially protective, despite conflicting results from randomized controlled trials. Here, we used single-cell RNA-sequencing (scRNA-seq) combined with barcoded antibodies t...
Article
Importance: Radiologically isolated syndrome (RIS) represents the earliest detectable preclinical phase of multiple sclerosis (MS) punctuated by incidental magnetic resonance imaging (MRI) white matter anomalies within the central nervous system. Objective: To determine the time to onset of symptoms consistent with MS. Design, setting, and part...
Article
Objective: Cerebral vasculitis (CV) is a severe complication of pneumococcal meningitis (PM); whether dexamethasone use can reduce its occurrence remains to be determined. Methods: This is a retrospective observational bicentric study analyzing all adults with proven PM hospitalized between January 2002 and December 2020 in two tertiary hospital...
Article
Objectives: Functional neurological disorders have witnessed intense research activity in the fields of structural and functional neuroimaging for more than twenty years. Thus, we propose a synthesis of recent research findings and etiological hypotheses that have been proposed so far. This work should help clinicians to better understand the natu...
Article
Background: Vaccination in patients with multiple sclerosis (MS) treated with immunosuppressive drugs is highly recommended. Regarding COVID-19 vaccination, no specific concern has been raised. Objectives: We aimed to evaluate if COVID-19 vaccination or infection increased the risk of disease activity, either radiological or clinical, with conve...
Article
Full-text available
Importance: In patients with multiple sclerosis (MS), factors associated with severe COVID-19 include anti-CD20 therapies and neurologic disability, but it is still unclear whether these 2 variables are independently associated with severe COVID-19 or whether the association depends on MS clinical course. Objective: To assess the association bet...
Preprint
Full-text available
Multiple sclerosis (MS) is an inflammatory demyelinating disease often characterized by remission and relapse periods occurring at irregular intervals after an initial attack (clinically isolated syndrome) and followed by a gradual progression of disability. Clinical symptoms, magnetic resonance imaging and abnormalities in cerebrospinal fluid (CSF...
Article
Full-text available
The immune system plays a significant role in multiple sclerosis. While MS was historically thought to be T cell-mediated, multiple pieces of evidence now support the view that B cells are essential players in multiple sclerosis pathogenic processes. High-efficacy disease-modifying therapies that target the immune system have emerged over the past...
Article
Background: Cerebellar superficial siderosis (SS) has been recently reported to be present in about 10% of both hereditary and sporadic cerebral amyloid angiopathy (CAA) on 3T MRI using primarily susceptibility-weighted imaging. Objectives: Our aim was to assess cerebellar SS in sporadic CAA patients using 1.5T T2*-weighted MRI and to evaluate p...
Article
The radiologically isolated syndrome (RIS) was defined in 2009 as the presence of asymptomatic, incidentally identified demyelinating-appearing white matter lesions in the central nervous system within individuals lacking symptoms typical of multiple sclerosis. The RIS criteria have been validated and predict the transition to symptomatic MS reliab...
Article
Full-text available
Background and objectives: Ocrelizumab (OCR), a humanized anti-CD20 monoclonal antibody, is highly efficient in patients with relapsing-remitting multiple sclerosis (RR-MS). We assessed early cellular immune profiles and their association with disease activity at treatment start and under therapy, which may provide new clues on the mechanisms of a...
Article
Background and objectives In stroke patients treated with intravenous thrombolysis (IVT), presence and high number of strictly lobar cerebral microbleeds (compatible with cerebral amyloid angiopathy, CAA) seems to be associated with increased risk of hemorrhagic transformation, symptomatic hemorrhagic transformation, remote hemorrhage, and poor fun...
Article
Full-text available
Background and aimsMultiple sclerosis (MS) is associated with osteoporosis, possibly due to neurological disability and decreased calcium intake. The objective of this study was to evaluate the efficacy of a personalized nutritional advice program by a dietitian compared to the delivery of a standard advice form to optimize dietary calcium intake i...
Article
Full-text available
Background and Objectives Kappa free light chains (KFLC) seem to efficiently diagnose MS. However, extensive cohort studies are lacking to establish consensus cut-offs, notably to rule out non-MS autoimmune CNS disorders. Our objectives were to (1) determine diagnostic performances of CSF KFLC, KFLC index, and KFLC intrathecal fraction (IF) thresho...
Article
Full-text available
Background The effects of socio-economic status on mortality in patients with multiple sclerosis is not well known. The objective was to examine mortality due to multiple sclerosis according to socio-economic status. Methods A retrospective observational cohort design was used with recruitment from 18 French multiple sclerosis expert centers parti...
Article
Background and objectives The question of the long-term safety of pregnancy is a major concern in multiple sclerosis (MS) patients, but its study is biased by reverse causation (women with higher disability are less likely to experience pregnancy). Using a causal inference approach, we aimed to estimate the unbiased long-term effects of pregnancy o...
Article
Background In relapsing-remitting multiple sclerosis (RRMS), early identification of suboptimal responders can prevent disability progression. Objective We aimed to develop and validate a dynamic score to guide the early decision to switch from first- to second-line therapy. Methods Using time-dependent propensity scores (PS) from a French cohort...
Article
Full-text available
Background and objectives: To evaluate the predictive value of serum neurofilament light chain (sNfL) and CSF NfL (cNfL) in patients with radiologically isolated syndrome (RIS) for evidence of disease activity (EDA) and clinical conversion (CC). Methods: sNfL and cNfL were measured at RIS diagnosis by single-molecule array (Simoa). The risk of E...
Article
Objectives: We aimed to investigate the one-month humoral response to two or three doses as primary vaccination in specific populations compared to healthy adults. Methods: ANRS0001S-COV-POPART (NCT04824651) is a French nationwide multicenter prospective observational cohort study assessing the immune response to Covid-19 vaccines routinely admi...
Article
Objectives: Primary acute convexity subarachnoid hemorrhage (cSAH) in older patients can be observed in cerebral amyloid angiopathy (CAA) or idiopathic (with cSAH as potential initial manifestation of suspected CAA). We aimed to analyze baseline, clinical and MRI (including quantitative cSAH surface analysis and topographical probabilistic cSAH ma...
Article
Objectives To evaluate the rate of return of disease activity after cessation of multiple sclerosis (MS) disease-modifying therapy. Methods This was a retrospective cohort study from two large observational MS registries: MSBase and OFSEP. Patients with relapsing-remitting MS who had ceased a disease-modifying therapy and were followed up for the...
Article
Full-text available
Background Chronic Inflammatory Demyelinating Polyradiculoneuropathy (CIDP), a rare disorder affecting young adults, causes gradual weakness of the limbs, areflexia and impaired sensory function. New CIDP phenotypes without pathogenic antibodies but with modified cell profiles have been described. Treatments include corticotherapy, intravenous immu...
Article
Full-text available
Vitamin D deficiency has been associated with the risk of multiple sclerosis, disease activity and progression. Results from in vitro experiments, animal models and analysis of human samples from randomized controlled trials provide comprehensive data illustrating the pleiotropic actions of Vitamin D on the immune system. They globally result in im...
Article
Full-text available
Background Natalizumab and fingolimod are used as high-efficacy treatments in relapsing–remitting multiple sclerosis. Several observational studies comparing these two drugs have shown variable results, using different methods to control treatment indication bias and manage censoring. The objective of this empirical study was to elucidate the impac...
Article
Full-text available
Background: Therapeutic management of relapsing-remitting multiple sclerosis (RRMS) has evolved towards early treatment. The objective was to assess the impact of early treatment initiation on disability progression among RRMS first-line treated patients. Methods: This study included all incident RRMS cases starting interferon or glatiramer acet...
Article
Features of resting brain metabolism in motor functional neurological disorder are poorly characterized. This study aimed to investigate the alterations of resting brain metabolism in a cohort of patients experiencing a first episode of motor functional neurological disorder with recent symptom onset, and their association with persistent disabilit...
Article
MRI signal changes in the brainstem are observed in a multitude of disorders including vascular diseases, neoplastic lesions, degenerative diseases, inflammatory disorders, metabolic diseases, infections, and trauma. In some diseases, brainstem involvement is typical and sometimes isolated, while in other diseases, brainstem lesions are only observ...
Article
Depuis la première vague début 2020, l’épidémie de COVID-19 a bouleversé le fonctionnement de hôpitaux et la prise en charge de nombreux patients atteints de maladies chroniques, dont la sclérose en plaques (SEP). De grandes questions ont été soulevées par l’épidémie concernant les risques des traitements immunosuppresseurs. Les données observation...
Article
Full-text available
Radiologically Isolated Syndrome (RIS) is characterized by MRI-typical brain lesions fulfilling the 2009 Okuda criteria, detected in patients without clinical conditions suggestive of MS. Half of all RIS patients convert to MS within 10 years. The individual course of the disease, however, is highly variable with 12% of RIS converting directly to p...
Article
We present a native-Moroccan 39 year-old man with left hemiparesis, fever, weight loss, aphthous stomatitis, elbow arthritis and biological inflammatory syndrome for 3 weeks. He had no previous personal or familial antecedent. Cerebral MRI showed an infiltrative lesion from external capsule to diencephalon, with heterogeneous restriction and gadoli...
Article
Context: Posterior spinal cord lesions are found in patients with ganglionopathy. These are normally found in later stages of the neuronopathy as a consequence of dorsal root ganglia degeneration. Cerebellar Ataxia, Neuropathy, Vestibular Areflexia Syndrome (CANVAS) is an emerging neurological disorder. Myelitis lesions have been described in conf...
Article
In France, two therapeutic strategies can be offered after fingolimod (FNG) withdrawal to highly active relapsing–remitting multiple sclerosis (RRMS) patients: natalizumab (NTZ) or anti-CD20. We compared the effectiveness of these two strategies as a switch for FNG within the OFSEP database. The primary endpoint was the time to first relapse. Other...
Article
Full-text available
Multiple paraneoplastic syndromes are a rare clinical manifestation. We describe the case of an 82-year-old woman who presented with neurological (rapidly progressive cerebellar syndrome and combined sensory-motor neuronopathy) and rheumatological (palmar fasciitis and polyarthritis syndrome) paraneoplastic syndromes associated with two onconeural...
Article
Background and Purpose Intraplaque hemorrhage (IPH) is a key feature of vulnerable carotid atherosclerotic plaque (CAP), associated with low densities (<25 Hounsfield unit, HU) on CTA. This study aimed to analyze CAP on routine CTA performed in patients with symptomatic and asymptomatic carotid stenosis undergoing carotid endarterectomy (CEA) by as...
Article
Dissociative disorders (DD) and conversion disorders (CD) are frequent in general and psychiatric populations. Some evidence suggest that the hypothalamic-pituitary axis (HPA) and autonomic nervous system (ANS) are dysregulated in both disorders. We carried out a systematic review of the literature to summarize the existing knowledge on the stress...
Poster
Full-text available
Introduction: Younger age, oligoclonal bands, infratentorial, and presence of spinal cord lesions are factors associated with an increased 10-year risk of clinical conversion from radiologically isolated syndrome (RIS). Whether disease-modifying therapy is beneficial in RIS remains currently unknown. Objectives: To evaluate the 2-year risk of a cli...
Article
Full-text available
Importance: Younger age, oligoclonal bands, and infratentorial and spinal cord lesions are factors associated with an increased 10-year risk of clinical conversion from radiologically isolated syndrome (RIS) to multiple sclerosis (MS). Whether disease-modifying therapy is beneficial for individuals with RIS is currently unknown. Objectives: To e...
Article
IntroductionNatalizumab has proved to be more effective than fingolimod in reducing disease activity in relapsing-remitting multiple sclerosis (RRMS). Whether this association is universal for all patient groups remains to be determined.Objective The aim of this study was to compare the relative effectiveness of natalizumab and fingolimod in RRMS s...
Article
Full-text available
We evaluated the effect of DMTs on Covid‐19 severity in patients with MS, with a pooled‐analysis of two large cohorts from Italy and France. The association of baseline characteristics and DMTs with Covid‐19 severity was assessed by multivariate ordinal‐logistic models and pooled by a fixed‐effect meta‐analysis. 1066 patients with MS from Italy and...
Article
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Diagnosis of inherited ataxia and related diseases represents a real challenge given the tremendous heterogeneity and clinical overlap of the various causes. We evaluated the efficacy of molecular diagnosis of these diseases by sequencing a large cohort of undiagnosed families. We analyzed 366 unrelated consecutive patients with undiagnosed ataxia...
Article
Background: Acute infarction patterns have been described in cardioembolic stroke, mainly with atrial fibrillation (AF) or patent foramen ovale. We aimed to analyse acute infarction magnetic resonance imaging (MRI) characteristics in stroke patients with intracardiac thrombus (ICT) compared with stroke patients with AF. Methods: We performed a r...
Article
Full-text available
Multiple sclerosis (MS) is an immune-driven demyelinating disease of the central nervous system. Immune cell features are particularly promising as predictive biomarkers due to their central role in the pathogenesis but also as drug targets, even if nowadays, they have no impact in clinical practice. Recently, high-resolution approaches, such as ma...
Article
Full-text available
Objective To determine whether adult cases of Chronic Lymphocytic Inflammation with Pontine Perivascular Enhancement Responsive to Steroids (CLIPPERS) may be related to familial hemophagocytic lymphohistiocytosis (HLH) causes, we have screened patients with adult-onset CLIPPERS for mutations in primary HLH-associated genes. Methods In our cohort o...
Article
Background Natalizumab and fingolimod were the first preparations recommended for disease breakthrough in priorly treated relapsing-remitting multiple sclerosis. Of three published head-to-head studies two showed that natalizumab is the more effective to prevent relapses and EDSS worsening. Methods By re-analyzing original published results from M...
Article
Full-text available
We compared SimoaTM and EllaTM immunoassays to assess serum neurofilament‐light chain levels in 203 multiple sclerosis patients from the OFSEP HD study. There was a strong correlation (ρ = 0.86, p < 0.0001) between both platforms. The EllaTM instrument overestimated values by 17%, but as the data were linear (p = 0.57), it was possible to apply a c...
Article
Full-text available
Introduction 3,4-Dihydroxy-6-[¹⁸F]-fluoro-l-phenylalanine (FDOPA) positron emission tomography (PET) is sensitive for identifying primary brain tumors. However, increased FDOPA uptake has been reported in pseudotumoral brain lesions. Our aim was to analyse FDOPA-PET in patients with pseudotumoral brain lesions and to compare them with patients with...
Article
Introduction Le syndrome d’ataxie cérébelleuse avec neuropathie et aréflexie vestibulaire (CANVAS) est une pathologie héréditaire autosomique récessive dont la mutation a été publiée en 2019. Observation Un homme de 55 ans d’origine portugaise a consulté pour troubles de l’équilibre évoluant depuis trois ans, associant des paresthésies des quatre...
Article
Introduction La diplégie faciale révélant un syndrome de Guillain–Barré (SGB) est une manifestation neurologique qui émerge comme associée à l’infection virale émergente SARS-CoV-2. Observation Nous rapportons deux cas consécutifs de diplégie faciale en lien avec un SGB. Les patients remplissaient les critères cliniques (diplégie faciale, parésie,...
Article
Introduction L’usage de protoxyde d’azote (PA) à but récréatif est fréquent parmi les jeunes. Une consommation intense et prolongée peut entraîner des effets neurotoxiques. Plusieurs tableaux neuropsychiatriques différents ont été décrits. Observation Nous rapportons trois tableaux neurologiques consécutifs après consommation de PA. Le premier pat...
Article
Background: Disease modifying therapies (DMTs), have an impact on relapses and disease progression. Nonetheless, many patients with multiple sclerosis (pwMS) remain untreated. The objective of the present study was to determine the proportion of untreated patients with multiple sclerosis (pwMS) followed in expert centers in France and determine th...
Article
Background: The prognosis in Myelin oligodendrocyte glycoprotein antibody (MOG-IgG) associated disease (MOGAD) is a matter of debate. Our aim was to assess long-term outcomes of patients with MOGAD. Methods: We retrospectively analysed clinical and paraclinical data of patients who tested positive for MOG-IgG and had clinical follow-up of at lea...
Article
Background A delayed onset of treatment effect, termed therapeutic lag, may influence the assessment of treatment response in some patient subgroups. Objectives The objective of this study is to explore the associations of patient and disease characteristics with therapeutic lag on relapses and disability accumulation. Methods Data from MSBase, a...
Article
Full-text available
Background Amyloid pathology, which is one of the characteristics of Alzheimer’s disease (AD), results from altered metabolism of the beta-amyloid (Aβ) peptide in terms of synthesis, clearance, or aggregation. A decrease in cerebrospinal fluid (CSF) level Aβ1–42 is evident in AD, and the CSF ratio Aβ42/Aβ40 has recently been identified as one of th...
Article
Objectives: The main objective was to compare clinical features, disease course, myelin oligodendrocyte glycoprotein (MOG)-antibody (Ab) dynamics, between children and adults with MOG-Ab-associated disease (MOGAD). Methods: Retrospective multicentric, national study including 98 children and 268 adults with MOGAD between January 2014, and Septem...
Article
Objectives: Establish recommendations for the management of UTIs in MS patients. Background: Urinary tract infections (UTIs) are common during multiple sclerosis (MS) and are one of the most common comorbidities potentially responsible for deaths from urinary sepsis. Methods: The recommendations attempt to answer three main questions about UTI...
Article
Introduction Les atteintes cognitives sévères dans la sclérose en plaques (SEP) sont rarement inaugurales et les amnésies sont exceptionnelles. Observation Une patiente de 26 ans, droitière, sans antécédent, a été hospitalisée pour des troubles mnésiques s’aggravant en une semaine. L’examen clinique retrouvait une amnésie antérograde et rétrograde...
Article
L’incidence de la maladie de Basedow (MB) est plus élevée en cas de Sclérose en plaque (SEP) que dans la population générale (3,1 % vs 0,4 %). Le traitement par Anticorps Monoclonaux anti CD52 (Alentuzumab) prescrit dans la SEP a pour principal effet indésirable l’apparition d’une maladie de Basedow lors de la restauration de l’immunité, nécessitan...
Article
Purpose The purpose of this study was to create an algorithm that combines multiple machine-learning techniques to predict the expanded disability status scale (EDSS) score of patients with multiple sclerosis at two years solely based on age, sex and fluid attenuated inversion recovery (FLAIR) MRI data. Materials and methods Our algorithm combined...
Preprint
Full-text available
Background: Amyloid pathology, which is one of the characteristics of Alzheimer's disease (AD), results from altered metabolism of the beta-amyloid peptide (Aβ) in terms of synthesis, clearance or aggregation. A decrease in cerebrospinal fluid (CSF) level Aβ1-42 is evident in AD, and the CSF ratio Aβ40 /Aβ40 has recently been identified as one of t...
Article
Objective To assess the effect of anti-CD20 B-cell depletion with rituximab (RTX) on relapse rates in myelin oligodendrocyte glycoprotein antibody-associated disorder (MOGAD). Methods Retrospective review of RTX-treated MOGAD patients from 29 centres in 13 countries. The primary outcome measure was change in relapse rate after starting rituximab (...