1
|
de Seze J, Dive D, Ayrignac X, Castelnovo G, Payet M, Rayah A, Gobbi C, Vermersch P, Zecca C. Narrative Review on the Use of Cladribine Tablets as Exit Therapy for Stable Elderly Patients with Multiple Sclerosis. Neurol Ther 2024:10.1007/s40120-024-00603-y. [PMID: 38587749 DOI: 10.1007/s40120-024-00603-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2024] [Accepted: 03/08/2024] [Indexed: 04/09/2024] Open
Abstract
The number of ageing people with relapsing multiple sclerosis (RMS) is increasing. The efficacy of disease-modifying therapies (DMTs) for RMS declines with age. Also, older persons with MS may be more susceptible to infections, hospitalisations and malignancy. Aging people with MS have higher rates of comorbidities versus aged-matched controls, increasing the individual risk of disability. We review the therapeutic properties of cladribine tablets (CladT) in ageing people with RMS, with regard to their utility for allowing these individuals to cease continuous administration of a DMT (i.e. to act as an "exit therapy"). CladT is thought to be an immune reconstitution therapy, in that two short courses of oral treatment 1 year apart provide suppression of MS disease activity in responders that far outlasts the duration of treatment and post-treatment reductions in lymphocyte counts. Post hoc analyses, long-term follow-up of populations with RMS in randomised trials, and real-world evidence suggest that the efficacy of CladT is probably independent of age, although more data in the elderly are still needed. No clear adverse signals for lymphopenia or other adverse safety signals have emerged with increasing age, although immunosenescence in the setting of age-related "inflammaging" may predispose elderly patients to a higher risk of infections. Updating vaccination status is recommended, especially against pneumococci and herpes zoster for older patients, to minimise the risk of these infections. CladT may be a useful alternative treatment for ageing people with MS who often bear a burden of multiple comorbidities and polypharmacy and who are more exposed to the adverse effects of continuous immunosuppressive therapy.
Collapse
Affiliation(s)
- Jerome de Seze
- Department of Neurology, Strasbourg University Hospital, Strasbourg, France.
| | - Dominique Dive
- Department of Neurology, Liège University Hospital, Liège, Belgium
| | - Xavier Ayrignac
- Department of Neurology, University of Montpellier, INM, INSERM, Montpellier University Hospital, Montpellier, France
| | - Giovanni Castelnovo
- Department of Neurology, Nîmes University Hospital, Hopital Caremeau, Nîmes, France
| | - Marianne Payet
- Merck Santé S.A.S., an Affiliate of Merck KGaA, Lyon, France
| | - Amel Rayah
- Merck Santé S.A.S., an Affiliate of Merck KGaA, Lyon, France
| | - Claudio Gobbi
- Multiple Sclerosis Center, Neurocenter of Southern Switzerland, EOC, Lugano, Switzerland
- Faculty of Biomedical Sciences, Università Della Svizzera Italiana, Lugano, Switzerland
| | - Patrick Vermersch
- University of Lille, INSERM U1172 LilNCog, CHU Lille, FHU Precise, Lille, France
| | - Chiara Zecca
- Multiple Sclerosis Center, Neurocenter of Southern Switzerland, EOC, Lugano, Switzerland
- Faculty of Biomedical Sciences, Università Della Svizzera Italiana, Lugano, Switzerland
| |
Collapse
|
2
|
Van Hijfte L, Cambron M, Capron B, Dachy B, Decoo D, Dive D, Dubois B, Sankari SE, London F, Perrotta G, Popescu V, Van Pesch V, Van Wijmeersch B, Willekens B, Laureys G. Multiple Sclerosis Multidisciplinary Care: A National Survey and Lessons for the Global Community. Mult Scler Relat Disord 2024; 85:105540. [PMID: 38489948 DOI: 10.1016/j.msard.2024.105540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 01/31/2024] [Accepted: 03/04/2024] [Indexed: 03/17/2024]
Abstract
BACKGROUND Access to, standardization and reimbursement of multidisciplinary care for people with MS (PwMS) is lacking in many countries. Therefore, this study aims to describe the current multidisciplinary care for people with MS (PwMS) in Belgium and identify benefits, needs and future perspectives METHODS: A survey for PwMS questioned various aspects of MS and viewpoints on care. For MS nurses (MSN) and neurologists, employment, education, job-content, care organization and perspectives were inquired. Descriptive and univariate statistics were performed RESULTS: The PwMS survey comprised 916 respondents with a mean age of 46±12.7 years and 75,4 % of the respondents being female. The majority of the participants had relapsing remitting MS (60.8 %) and the mean patient determined disease steps (PDDS) was 2.0 (IQR=3). 65.3 % and 60.4 % of the PwMS reported having access to a multidisciplinary team (MDT) or MSN. Access to an MSN was associated with more frequent disease modifying treatment (p=.015), spasticity (p=.042) and gait treatment (p=.035), but also more physiotherapy (p=.004), driver's license adjustment (p<.001) and a higher employment rate (p=.004). MDT access was associated with more frequent symptomatic bladder treatment (p=.047), higher physiotherapy rate (p<.001), higher work- (p=.002), insurance- (p<.001) and home support measures (p=.019). PwMS without an available MDT more often indicated that MS care needs improvement (p<.001). MSN's (n = 22) were mainly funded through various budgets, including hospital and neurology practice budgets. Finally, 69 % and 75 % neurologists (n = 62) working without an MSN or MDT stated a need of such support and 61 % agreed that MDT's should be organized at hospital-network level CONCLUSION: MDT and MSN availability may enhance medical and socio-economic support for PwMS. Guidelines, alignment and reimbursement are needed.
Collapse
Affiliation(s)
- Liesbeth Van Hijfte
- Ghent University Hospital, 4Brain Research Unit, Department of Neurology, Gent, Belgium.
| | - Melissa Cambron
- Sint-Jan Bruges Hospital, Department of Neurology, Brugge, Belgium
| | - Brigitte Capron
- CHU de Charleroi, Department of Neurology, Lodelinsart, Belgium
| | - Bernard Dachy
- Hôpital Brugmann, Université Libre de Bruxelles, Department of Neurology, Brussels, Belgium
| | - Danny Decoo
- AZ Alma, Department of Neurology, Eeklo, Belgium
| | | | - Bénédicte Dubois
- University Hospitals Leuven, Department of Neurology, Leuven, Belgium
| | - Souraya El Sankari
- Cliniques Universitaires Saint-Luc, UCLouvain, Department of Neurology, Brussels, Belgium
| | - Frederic London
- CHU UCL Namur, Université catholique de Louvain, Department of Neurology, Yvoir, Belgium
| | - Gaetano Perrotta
- Hôpital Erasme, Université Libre de Bruxelles, Department of Neurology, Brussels, Belgium
| | - Veronica Popescu
- University MS Centre (UMSC), Hasselt-Pelt, Belgium; Noorderhart Hospitals, Revalidation and MS, Pelt, Belgium
| | - Vincent Van Pesch
- Cliniques Universitaires Saint-Luc, UCLouvain, Department of Neurology, Brussels, Belgium
| | - Bart Van Wijmeersch
- University MS Centre (UMSC), Hasselt-Pelt, Belgium; Noorderhart Hospitals, Revalidation and MS, Pelt, Belgium
| | - Barbara Willekens
- Antwerp University Hospital, Department of Neurology and UNiCA (University Neuroimmunology Center Antwerp), Edegem, Belgium; University of Antwerp, Faculty of Medicine and Health Sciences, Translational Neurosciences Research Group, Wilrijk, Belgium
| | - Guy Laureys
- Ghent University Hospital, 4Brain Research Unit, Department of Neurology, Gent, Belgium
| |
Collapse
|
3
|
Denissen S, Engemann DA, De Cock A, Costers L, Baijot J, Laton J, Penner IK, Grothe M, Kirsch M, D'hooghe MB, D'Haeseleer M, Dive D, De Mey J, Van Schependom J, Sima DM, Nagels G. Brain age as a surrogate marker for cognitive performance in multiple sclerosis. Eur J Neurol 2022; 29:3039-3049. [PMID: 35737867 PMCID: PMC9541923 DOI: 10.1111/ene.15473] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 06/04/2022] [Accepted: 06/15/2022] [Indexed: 11/28/2022]
Abstract
Background and purpose Data from neuro‐imaging techniques allow us to estimate a brain's age. Brain age is easily interpretable as ‘how old the brain looks’ and could therefore be an attractive communication tool for brain health in clinical practice. This study aimed to investigate its clinical utility by investigating the relationship between brain age and cognitive performance in multiple sclerosis (MS). Methods A linear regression model was trained to predict age from brain magnetic resonance imaging volumetric features and sex in a healthy control dataset (HC_train, n = 1673). This model was used to predict brain age in two test sets: HC_test (n = 50) and MS_test (n = 201). Brain‐predicted age difference (BPAD) was calculated as BPAD = brain age minus chronological age. Cognitive performance was assessed by the Symbol Digit Modalities Test (SDMT). Results Brain age was significantly related to SDMT scores in the MS_test dataset (r = −0.46, p < 0.001) and contributed uniquely to variance in SDMT beyond chronological age, reflected by a significant correlation between BPAD and SDMT (r = −0.24, p < 0.001) and a significant weight (−0.25, p = 0.002) in a multivariate regression equation with age. Conclusions Brain age is a candidate biomarker for cognitive dysfunction in MS and an easy to grasp metric for brain health.
Collapse
Affiliation(s)
- S Denissen
- AIMS lab, Center for Neurosciences, UZ Brussel, Vrije Universiteit Brussel, Pleinlaan 2, 1050, Brussels, Belgium.,Kolonel Begaultlaan 1b, 3012, Belgium
| | - D A Engemann
- Université Paris-Saclay, CEA, 1 Rue Honoré d'Estienne d'Orves, 91120, Palaiseau, France.,Department of Neurology, Max Planck Institute for Human Cognitive and Brain Sciences, Stephanstraße 1A, D-04103, Leipzig, Germany
| | - A De Cock
- AIMS lab, Center for Neurosciences, UZ Brussel, Vrije Universiteit Brussel, Pleinlaan 2, 1050, Brussels, Belgium
| | - L Costers
- AIMS lab, Center for Neurosciences, UZ Brussel, Vrije Universiteit Brussel, Pleinlaan 2, 1050, Brussels, Belgium.,Kolonel Begaultlaan 1b, 3012, Belgium
| | - J Baijot
- AIMS lab, Center for Neurosciences, UZ Brussel, Vrije Universiteit Brussel, Pleinlaan 2, 1050, Brussels, Belgium
| | - J Laton
- AIMS lab, Center for Neurosciences, UZ Brussel, Vrije Universiteit Brussel, Pleinlaan 2, 1050, Brussels, Belgium.,Nuffield Department of Clinical Neurosciences, University of Oxford, Headley Way, Headington, Oxford, OX3 9DU, United Kingdom
| | - I K Penner
- Cogito Center for Applied Neurocognition and Neuropsychological Research, Merowingerplatz 1, 40225, Düsseldorf, Germany.,Department of Neurology, Medical Faculty, Heinrich Heine University Düsseldorf, Universitätsstr. 1, 40225, Düsseldorf, Germany
| | - M Grothe
- Department of Neurology, University Medicine Greifswald, Ferdinand-Sauerbruchstraße, 17475, Greifswald, Germany
| | - M Kirsch
- Institute for Diagnostic Radiology and Neuroradiology, University Medicine of Greifswald, Ferdinand-Sauerbruch-Straße, 17489, Greifswald, Germany
| | - M B D'hooghe
- National Multiple Sclerosis Center Melsbroek, Vereeckenstraat 44, 1820, Melsbroek, Belgium.,Center for Neurosciences, Vrije Universiteit Brussel, Laarbeeklaan 103, 1090, Brussels, Belgium
| | - M D'Haeseleer
- National Multiple Sclerosis Center Melsbroek, Vereeckenstraat 44, 1820, Melsbroek, Belgium
| | - D Dive
- Department of Neurology, University Hospital of Liege, Rue Grandfosse 31/33, 4130, Esneux, Belgium
| | - J De Mey
- Department of Radiology, UZ Brussel, Laarbeeklaan 101, 1090, Brussels, Belgium
| | - J Van Schependom
- AIMS lab, Center for Neurosciences, UZ Brussel, Vrije Universiteit Brussel, Pleinlaan 2, 1050, Brussels, Belgium.,Department of Electronics and Informatics (ETRO), Vrije Universiteit Brussel, Pleinlaan 2, 1050, Brussels, Belgium
| | - D M Sima
- AIMS lab, Center for Neurosciences, UZ Brussel, Vrije Universiteit Brussel, Pleinlaan 2, 1050, Brussels, Belgium.,Kolonel Begaultlaan 1b, 3012, Belgium
| | - G Nagels
- AIMS lab, Center for Neurosciences, UZ Brussel, Vrije Universiteit Brussel, Pleinlaan 2, 1050, Brussels, Belgium.,Kolonel Begaultlaan 1b, 3012, Belgium.,St Edmund Hall, University of Oxford, Queen's Lane, Oxford, OX1 4AR, UK
| |
Collapse
|
4
|
Dive D, Dauby S, Lommers E, Hansen I, Groenendyck D, Ernon C, Maquet P. [Multiple sclerosis : a neurological dysimmune inflammatory disease]. Rev Med Liege 2022; 77:384-391. [PMID: 35657198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Multiple sclerosis is a central nervous system autoimmune disease of the white and grey matters. Its pathophysiology is much better well known. It results from the interaction between genetic and environmental susceptibility factors. The role of EBV virus has recently been highlighted. Imaging techniques and neuropathology knowledge allow to distinguish several distinct processes responsible for focal and more diffuse inflammation. Therapeutic advances in recent years have been considerable. Different molecules and treatment sequences can be proposed to the patient with a demonstrated positive impact on the risk of disability secondary progression. Precise follow-up is a key. It requires optimal and early use of various treatments. The therapeutic choice must be guided by obtaining stabilization of the disease, both clinically and in terms of imaging, without exposing the patient to an excessive risk of side effects. Continuous and sequential treatments are available.
Collapse
Affiliation(s)
- D Dive
- Service de Neurologie, CHU Liège, Belgique
| | - S Dauby
- Service de Neurologie, CHU Liège, Belgique
| | - E Lommers
- Service de Neurologie, CHU Liège, Belgique
| | - I Hansen
- Service de Neurologie, CHU Liège, Belgique
| | | | - C Ernon
- Service de Neurologie, CHU Liège, Belgique
| | - P Maquet
- Service de Neurologie, CHU Liège, Belgique
| |
Collapse
|
5
|
Dauby S, Dive D, Lutteri L, Andris C, Hansen I, Maquet P, Lommers E. Comparative study of AQP4-NMOSD, MOGAD and seronegative NMOSD: a single-center Belgian cohort. Acta Neurol Belg 2022; 122:135-144. [PMID: 34097296 PMCID: PMC8894224 DOI: 10.1007/s13760-021-01712-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Accepted: 05/13/2021] [Indexed: 12/11/2022]
Abstract
Purpose To emphasize physio-pathological, clinical and prognosis differences between conditions causing serious and sometimes very similar clinical manifestations: anti-aquaporin-4 (AQP4) and anti-myelin oligodendrocyte glycoprotein (MOG) antibodies related diseases, and seronegative NMOSD (neuromyelitis optica spectrum disorders).
Methods Based on Wingerchuk et al. (Neurology 85:177–189, 2015) criteria for NMOSD and on those more recently proposed by Jarius et al. (J Neuroinflammation 15:134, 2018) for MOGAD (MOG associated disorders), we retrospectively surveyed 10 AQP4-NMOSD, 8 MOGAD and 2 seronegative NMOSD, followed at the specialized neuroimmunology unit of the CHU Liège.
Results Female predominance was only observed in AQP4 group. Age at onset was 37.8 and 27.7 years old for AQP4-NMOSD and MOGAD respectively. In both groups, the first clinical event most often consisted of optic neuritis (ON), followed by isolated myelitis. Fifteen of our 20 patients encountered a relapsing course with 90% relapses in AQP4-NMOSD, 62.5% in MOGAD and 50% in seronegative group, and a mean period between first and second clinical event of 7.1 and 4.8 months for AQP4-NMOSD and MOGAD, respectively. In total we counted 54 ON, with more ON per patient in MOGAD. MOG-associated ON mainly affected the anterior part of the optic nerve with a papilledema in 79.2% of cases. Despite a fairly good visual outcome after MOG-associated ON, retinal nerve fibre layer (RNFL) thickness decreased, suggesting a fragility of the optic nerve toward further attacks.
Conclusion As observed in larger cohorts, our MOGAD and AQP4-NMOSD cases differ by clinical and prognostic features. A better understanding of these diseases should encourage prompt biological screening and hasten proper diagnosis and treatment.
Supplementary Information The online version contains supplementary material available at 10.1007/s13760-021-01712-3.
Collapse
|
6
|
Abstract
Atezolizumab successfully reinvigorated JC virus immunity in a patient in Belgium with progressive multifocal leukoencephalopathy, as demonstrated by clinical, virologic, and radiologic response to treatment. However, the treatment also resulted in immune reconstitution inflammatory syndrome and life-threatening immune-related adverse events. These conditions were treated with corticosteroids, leading to treatment resistance.
Collapse
|
7
|
Hunter SF, Aburashed RA, Alroughani R, Chan A, Dive D, Eichau S, Kantor D, Kim HJ, Lycke J, Macdonell RAL, Pozzilli C, Scott T, Sharrack B, Wiendl H, Chung L, Daizadeh N, Baker DP, Vermersch P. Confirmed 6-Month Disability Improvement and Worsening Correlate with Long-term Disability Outcomes in Alemtuzumab-Treated Patients with Multiple Sclerosis: Post Hoc Analysis of the CARE-MS Studies. Neurol Ther 2021; 10:803-818. [PMID: 34165694 PMCID: PMC8571457 DOI: 10.1007/s40120-021-00262-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Accepted: 06/03/2021] [Indexed: 11/28/2022] Open
Abstract
Introduction In the 2-year CARE-MS trials (NCT00530348; NCT00548405) in patients with relapsing–remitting multiple sclerosis, alemtuzumab showed superior efficacy versus subcutaneous interferon beta-1a. Efficacy was maintained in two consecutive extensions (NCT00930553; NCT02255656). This post hoc analysis compared disability outcomes over 9 years among alemtuzumab-treated patients according to whether they experienced confirmed disability improvement (CDI) or worsening (CDW) or neither CDI nor CDW. Methods CARE-MS patients were randomized to receive two alemtuzumab courses (12 mg/day; 5 days at baseline; 3 days at 12 months), with additional as-needed 3-day courses in the extensions. CDI or CDW were defined as ≥ 1.0-point decrease or increase, respectively, in Expanded Disability Status Scale (EDSS) score from core study baseline confirmed over 6 months, assessed in patients with baseline EDSS score ≥ 2.0. Improved or stable EDSS scores were defined as ≥ 1-point decrease or ≤ 0.5-point change (either direction), respectively, from core study baseline. Functional systems (FS) scores were also assessed. Results Of 511 eligible patients, 43% experienced CDI and 34% experienced CDW at any time through year 9 (patients experiencing both CDI and CDW were counted in each individual group); 29% experienced neither CDI nor CDW. At year 9, patients with CDI had a −0.58-point mean EDSS score change from baseline; 88% had stable or improved EDSS scores. Improvements occurred across all FS, primarily in sensory, pyramidal, and cerebellar domains. Patients with CDW had a +1.71-point mean EDSS score change; 16% had stable or improved EDSS scores. Patients with neither CDI nor CDW had a −0.10-point mean EDSS score change; 98% had stable or improved EDSS scores. Conclusion CDI achievement at any point during the CARE-MS studies was associated with improved disability at year 9, highlighting the potential of alemtuzumab to change the multiple sclerosis course. Conversely, CDW at any point was associated with worsened disability at year 9. Supplementary Information The online version contains supplementary material available at 10.1007/s40120-021-00262-3.
Collapse
Affiliation(s)
- Samuel F Hunter
- Advanced Neurosciences Institute, 101 Forrest Crossing Blvd., Franklin, TN, 37064, USA.
| | - Rany A Aburashed
- Institute for Neurosciences and Multiple Sclerosis, Owosso, MI, USA
| | - Raed Alroughani
- Division of Neurology, Department of Medicine, Amiri Hospital, Sharq, Kuwait
| | - Andrew Chan
- Department of Neurology, Inselspital Bern, Bern University Hospital, University of Bern, Bern, Switzerland
| | | | - Sara Eichau
- Hospital Universitario Virgen Macarena, Seville, Spain
| | - Daniel Kantor
- Florida Atlantic University, Boca Raton, FL, USA.,Nova Southeastern University, Fort Lauderdale, FL, USA.,Penn Center for Global Health, Philadelphia, PA, USA
| | - Ho Jin Kim
- Research Institute and Hospital of National Cancer Center, Goyang, Korea
| | - Jan Lycke
- Department of Clinical Neuroscience, Institute of Neuroscience and Physiology at Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Richard A L Macdonell
- Austin Health and Florey Institute of Neuroscience and Mental Health, Melbourne, VIC, Australia
| | - Carlo Pozzilli
- Department of Human Neuroscience, Sapienza University, Rome, Italy
| | - Thomas Scott
- Allegheny General Hospital, Drexel University College of Medicine, Pittsburgh, PA, USA
| | - Basil Sharrack
- Sheffield NIHR Neuroscience BRC and Sheffield Teaching Hospitals, Sheffield, UK
| | | | | | | | | | - Patrick Vermersch
- Univ. Lille, INSERM U1172 LilNCog, CHU Lille, FHU Precise, Lille, France
| | | |
Collapse
|
8
|
Hardy C, Dive D, Leloup G, Leprince J, Randolf L. Understanding the Effect of Thermal Treatment on the Physico-Mechanical Properties of Light-Cured Composites for use in Indirect Restorations. Eur J Prosthodont Restor Dent 2021; 29:35-45. [PMID: 33026723 DOI: 10.1922/ejprd_2143hardy11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVES To study the potential benefits of a post-cure thermal treatment on key physico-mechanical properties of light-cured resin-based composites for use in indirect restorations, a CAD/CAM composite block being used as control. MATERIAL AND METHODS Six commercial composites were light-cured before being thermally treated in a furnace at 90°C during 15 minutes (CAD/CAM composite used as a control). The properties measured with or without thermal treatment were: degree of conversion, flexural strength, elastic modulus, Vickers microHardness, organic mass content and eluted and absorbed mass before and after storage in ethanol. The data were analysed using one-way ANOVA, and Weibull distributions. RESULTS A general increase in the properties measured was observed for all materials after thermal treatment, except a general decrease in mass elution and absorption (most statistically significant: p⟨0.05). Weibull analysis showed a tendency (p⟩0.05) of increased reliability of the flexural strength after thermal treatment for all materials. CONCLUSION The present data revealed clear physico-mechanical improvements after thermal treatment of light-cured composites. Such method could hence be beneficially used to produce indirect restorations as compared to stratifying and light-curing the same composites in situ. However, most properties of the control CAD/CAM composite were higher, but CAD/CAM technologies aren't available everywhere.
Collapse
Affiliation(s)
- C Hardy
- School of Dental Medicine and Stomatology, at Cliniques Universitaires Saint-Luc, UCLouvain, Brussels, Belgium.,DRIM research group, Advanced Drug Delivery and Biomaterials (ADDB), Louvain Drug Research Institute (LDRI), UCLouvain, Brussels, Belgium
| | - D Dive
- School of Dental Medicine and Stomatology, at Cliniques Universitaires Saint-Luc, UCLouvain, Brussels, Belgium
| | - G Leloup
- School of Dental Medicine and Stomatology, at Cliniques Universitaires Saint-Luc, UCLouvain, Brussels, Belgium.,DRIM research group, Advanced Drug Delivery and Biomaterials (ADDB), Louvain Drug Research Institute (LDRI), UCLouvain, Brussels, Belgium
| | - J Leprince
- School of Dental Medicine and Stomatology, at Cliniques Universitaires Saint-Luc, UCLouvain, Brussels, Belgium.,DRIM research group, Advanced Drug Delivery and Biomaterials (ADDB), Louvain Drug Research Institute (LDRI), UCLouvain, Brussels, Belgium
| | - L Randolf
- DRIM research group, Advanced Drug Delivery and Biomaterials (ADDB), Louvain Drug Research Institute (LDRI), UCLouvain, Brussels, Belgium
| |
Collapse
|
9
|
Yperman J, Becker T, Valkenborg D, Hellings N, Cambron M, Dive D, Laureys G, Popescu V, Van Wijmeersch B, Peeters LM. Deciphering the Morphology of Motor Evoked Potentials. Front Neuroinform 2020; 14:28. [PMID: 32765249 PMCID: PMC7381179 DOI: 10.3389/fninf.2020.00028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Accepted: 05/26/2020] [Indexed: 11/13/2022] Open
Abstract
Motor Evoked Potentials (MEPs) are used to monitor disability progression in multiple sclerosis (MS). Their morphology plays an important role in this process. Currently, however, there is no clear definition of what constitutes a normal or abnormal morphology. To address this, five experts independently labeled the morphology (normal or abnormal) of the same set of 1,000 MEPs. The intra- and inter-rater agreement between the experts indicates they agree on the concept of morphology, but differ in their choice of threshold between normal and abnormal morphology. We subsequently performed an automated extraction of 5,943 time series features from the MEPs to identify a valid proxy for morphology, based on the provided labels. To do this, we compared the cross-validation performances of one-dimensional logistic regression models fitted to each of the features individually. We find that the approximate entropy (ApEn) feature can accurately reproduce the majority-vote labels. The performance of this feature is evaluated on an independent test set by comparing to the majority vote of the neurologists, obtaining an AUC score of 0.92. The model slightly outperforms the average neurologist at reproducing the neurologists consensus-vote labels. We can conclude that MEP morphology can be consistently defined by pooling the interpretations from multiple neurologists and that ApEn is a valid continuous score for this. Having an objective and reproducible MEP morphological abnormality score will allow researchers to include this feature in their models, without manual annotation becoming a bottleneck. This is crucial for large-scale, multi-center datasets. An exploratory analysis on a large single-center dataset shows that ApEn is potentially clinically useful. Introducing an automated, objective, and reproducible definition of morphology could help overcome some of the barriers that are currently obstructing broad adoption of evoked potentials in daily care and patient follow-up, such as standardization of measurements between different centers, and formulating guidelines for clinical use.
Collapse
Affiliation(s)
- Jan Yperman
- Theoretical Physics, Hasselt University, Diepenbeek, Belgium.,I-Biostat, Data Science Institute, Hasselt University, Diepenbeek, Belgium.,BIOMED, Hasselt University, Diepenbeek, Belgium
| | - Thijs Becker
- Theoretical Physics, Hasselt University, Diepenbeek, Belgium.,I-Biostat, Data Science Institute, Hasselt University, Diepenbeek, Belgium
| | - Dirk Valkenborg
- I-Biostat, Data Science Institute, Hasselt University, Diepenbeek, Belgium
| | | | - Melissa Cambron
- Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel (VUB), Brussels, Belgium.,Department of Neurology, AZ Sint-Jan, Brugge, Belgium
| | | | - Guy Laureys
- Department of Neurology, University Hospital Ghent, Ghent, Belgium
| | - Veronica Popescu
- BIOMED, Hasselt University, Diepenbeek, Belgium.,Revalidation and MS Center Pelt, Pelt, Belgium
| | - Bart Van Wijmeersch
- BIOMED, Hasselt University, Diepenbeek, Belgium.,Revalidation and MS Center Pelt, Pelt, Belgium
| | - Liesbet M Peeters
- I-Biostat, Data Science Institute, Hasselt University, Diepenbeek, Belgium.,BIOMED, Hasselt University, Diepenbeek, Belgium
| |
Collapse
|
10
|
Dive D, Dauby S, Lommers E, Hansen I, Maquet P. [Multiple sclerosis : therapy update]. Rev Med Liege 2020; 75:382-385. [PMID: 32496684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Multiple sclerosis is still a severe disease potentially associated with a short- or long-term disability in young adults. Since a few years therapeutic progresses are considerable. New drugs and new therapy rationale considerably improved our knowledge and patient's care. Early treatment is a key within dedicated specialized and multidisciplinary units. Clinical and neuroradiological no evidence of disease activity (NEDA) is a goal, which is more often reached. Patient's evolution and follow-up is completely changed in recent years with more efficacy.
Collapse
Affiliation(s)
- D Dive
- Unité de Neuroimmunologie, CHU Liège, Belgique
| | - S Dauby
- Unité de Neuroimmunologie, CHU Liège, Belgique
| | - E Lommers
- Unité de Neuroimmunologie, CHU Liège, Belgique
| | - I Hansen
- Unité de Neuroimmunologie, CHU Liège, Belgique
| | - P Maquet
- Unité de Neuroimmunologie, CHU Liège, Belgique
| |
Collapse
|
11
|
Alroughani R, Vermersch P, Aburashed RA, Chan A, Dive D, Izquierdo G, Kantor D, Kim HJ, Lycke J, Macdonell RA. Improvements Across Functional Systems Are Maintained Regardless of Early VS Late Confirmed Disability Improvement: CARE-MS 6-Year Follow-Up. Mult Scler Relat Disord 2020. [DOI: 10.1016/j.msard.2019.11.062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
12
|
Lommers E, Simon J, Reuter G, Delrue G, Dive D, Degueldre C, Balteau E, Phillips C, Maquet P. Multiparameter MRI quantification of microstructural tissue alterations in multiple sclerosis. Neuroimage Clin 2019; 23:101879. [PMID: 31176293 PMCID: PMC6555891 DOI: 10.1016/j.nicl.2019.101879] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 04/23/2019] [Accepted: 05/25/2019] [Indexed: 01/25/2023]
Abstract
Objectives Conventional MRI is not sensitive to many pathological processes underpinning multiple sclerosis (MS) ongoing in normal appearing brain tissue (NABT). Quantitative MRI (qMRI) and a multiparameter mapping (MPM) protocol are used to simultaneously quantify magnetization transfer (MT) saturation, transverse relaxation rate R2* (1/T2*) and longitudinal relaxation rate R1 (1/T1), and assess differences in NABT microstructure between MS patients and healthy controls (HC). Methods This prospective cross-sectional study involves 36 MS patients (21 females, 15 males; age range 22–63 years; 15 relapsing-remitting MS - RRMS; 21 primary or secondary progressive MS - PMS) and 36 age-matched HC (20 females, 16 males); age range 21–61 years). The qMRI maps are computed and segmented in lesions and 3 normal appearing cerebral tissue classes: normal appearing cortical grey matter (NACGM), normal appearing deep grey matter (NADGM), normal appearing white matter (NAWM). Individual median values are extracted for each tissue class and MR parameter. MANOVAs and stepwise regressions assess differences between patients and HC. Results MS patients are characterized by a decrease in MT, R2* and R1 within NACGM (p < .0001) and NAWM (p < .0001). In NADGM, MT decreases (p < .0001) but R2* and R1 remain normal. These observations tend to be more pronounced in PMS. Quantitative MRI parameters are independent predictors of clinical status: EDSS is significantly related to R1 in NACGM and R2* in NADGM; the latter also predicts motor score. Cognitive score is best predicted by MT parameter within lesions. Conclusions Multiparametric data of brain microstructure concord with the literature, predict clinical performance and suggest a diffuse reduction in myelin and/or iron content within NABT of MS patients. We revisit microstructural alterations of NABT in MS patients by simultaneously quantifying three MRI parameters. Data suggest reduction of MT/R2*/R1 in NABT of MS patients, suggesting a reduction in myelin and/or iron content. Quantitative MRI parameters in NABT are independent predictors of clinical status.
Collapse
Affiliation(s)
- Emilie Lommers
- GIGA - CRC in vivo Imaging, University of Liège, Liège, Belgium; Clinical Neuroimmunology Unit, Neurology Department, CHU Liège, Belgium.
| | - Jessica Simon
- Psychology and Neurosciences of Cognition Research Unit, University of Liège, Belgium
| | - Gilles Reuter
- GIGA - CRC in vivo Imaging, University of Liège, Liège, Belgium; Neurosurgery Department, CHU Liège, Belgium
| | - Gaël Delrue
- Clinical Neuroimmunology Unit, Neurology Department, CHU Liège, Belgium
| | - Dominique Dive
- Clinical Neuroimmunology Unit, Neurology Department, CHU Liège, Belgium
| | | | - Evelyne Balteau
- GIGA - CRC in vivo Imaging, University of Liège, Liège, Belgium
| | - Christophe Phillips
- GIGA - CRC in vivo Imaging, University of Liège, Liège, Belgium; GIGA - in silico Medicine, University of Liège, Liège, Belgium
| | - Pierre Maquet
- GIGA - CRC in vivo Imaging, University of Liège, Liège, Belgium; Clinical Neuroimmunology Unit, Neurology Department, CHU Liège, Belgium
| |
Collapse
|
13
|
Giffroy X, Dive D, Kaux JF, Maes N, Albert A, Göbels C, Wang F. Is the triple stimulation technique a better quantification tool of motor dysfunction than motor evoked potentials in multiple sclerosis? Acta Neurol Belg 2019; 119:47-54. [PMID: 30136146 DOI: 10.1007/s13760-018-1001-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Accepted: 08/13/2018] [Indexed: 01/07/2023]
Abstract
The triple stimulation technique (TST) was rarely used in multiple sclerosis (MS). This study aimed to compare TST and motor evoked potentials (MEP) for the quantification of motor dysfunction. Central motor conduction based on MEP (four limbs) and TST (upper limbs) was assessed in 28 MS patients with a median Expanded Disability Status Scale (EDSS) of 4. EDSS, timed 25-foot walk (T25FW), grasping strength and motor components of the MS functional composite were evaluated. Regression analysis was used to assess the relationship between MEP, TST and clinical findings. TST was negatively correlated with EDSS (r = - 0.74, p < 0.0001) and to a lesser extent with T25FW (r = - 0.47, p < 0.05), and grasping strength (r = - 0.43, p < 0.05). A multiple regression analysis underlined the better correlation between clinical data and TST (R2 = 0.56, p < 0.0005) than with MEP (0.03 < R2 < 0.22, p > 0.05). This study evidenced the value of TST as a quantification tool of motor dysfunction. TST appeared to reflect a global disability since it was correlated not only to hand function but also to walking capacity.
Collapse
|
14
|
Hardy C, Dive D, Leprince J, Randolph L. Improvement of resin-based composites physico-mechanical characteristics after thermal post-cure. Dent Mater 2019. [DOI: 10.1016/j.dental.2019.08.065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
15
|
Zephir H, Puyade M, Gueguen A, Michel L, Terriou L, Dive D, Laureys G, Mathey G, Labauge P, Marjanovic Z, Pugnet G, Badoglio M, Lansiaux P, Yakoub-Agha I, Béguin Y, Farge D. [Indications and follow-up for autologous hematopoietic stem cell transplantation in multiple sclerosis: Guidelines from the Francophone Society of Bone Marrow Transplantation and Cellular Therapy (SFGM-TC) in association with the Francophone Society of Multiple Sclerosis]. Bull Cancer 2018; 106:S92-S101. [PMID: 30527815 DOI: 10.1016/j.bulcan.2018.11.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Accepted: 11/05/2018] [Indexed: 12/16/2022]
Abstract
The Francophone Society of Bone Marrow Transplantation and Cellular Therapy (SFGM-TC) organized the 8th allogeneic hematopoietic stem cell transplantation clinical practices harmonization workshop series in September 2017 in Lille, France. In this article we give the indications of autologous stem cell transplantation in multiple sclerosis as well as recommendations regarding post-transplant follow-up of patients under the hospice of the SFGM-TC and the Francophone Society of Multiple Sclerosis.
Collapse
Affiliation(s)
- Helène Zephir
- CHU de Lille, université de Lille, pôle des neurosciences et de l'appareil locomoteur, LIRIC (Lille Inflammation Research International Center) UMR 995, rue Emile-Laine, 59000 Lille, France.
| | - Mathieu Puyade
- CHU de Poitiers, service de médecine interne, 2, rue de la Milétrie, 86021 Poitiers cedex, France
| | - Antoine Gueguen
- Fondation A.-de Rothschild, service de neurologie, 25, rue Manin, 75940 Paris cedex 19, France
| | - Laure Michel
- CHU de Nantes, hôpital Laennec, service de neurologie, boulevard Jacques-Monod, 44800 Saint-Herblain, France
| | - Louis Terriou
- CHRU, hôpital Claude-Huriez, service des maladies du sang, rue Michel-Polonovski, 59037 Lille cedex, France
| | - Dominique Dive
- CHU de Liège, unité de neuro-immunologie clinique, boulevard de l'Hôpital, 4000 Liège, Belgique
| | - Guy Laureys
- University hospital Ghent, department of neurology, De Pintelaan 185, 9000 Ghent, Belgique
| | - Guillaume Mathey
- CHRU de Nancy, hôpital Central, service de neurologie, 29, avenue du Maréchal-de-Lattre-de-Tassigny, 54035 Nancy cedex, France
| | - Pierre Labauge
- CHU de Montpellier, hôpital Gui-de-Chauliac, centre de ressources et de compétences sclérose en plaques, 80, avenue Augustin-Fliche, 34295 Montpellier cedex 5, France
| | - Zora Marjanovic
- AP-HP, hôpital Saint-Antoine, hématologie clinique et thérapie cellulaire, 184, rue du Faubourg-Saint-Antoine, 75571 Paris cedex 12, France
| | - Grégory Pugnet
- CHU de Toulouse, hôpital Purpan, service de médecine interne, 1, place Baylac, 31059 Toulouse, France
| | - Manuela Badoglio
- Hôpital Saint-Antoine, EBMT Data Office, 184, rue du Faubourg-Saint-Antoine, 75571 Paris cedex 12, France
| | - Pauline Lansiaux
- Hôpital Saint-Louis, centre de référence des maladies auto-immunes systémiques rares d'Île-de-France, filière FAI2R, IUH EA-3518, UF04, unité de médecine interne, maladies auto-immunes et pathologie vasculaire, 1, avenue Claude-Vellefaux, 75475 Paris, France
| | | | - Yves Béguin
- CHU de Liège, université de Liège, service d'hématologie, 1, avenue de l'Hôpital, 4000 Liège, Belgique
| | - Dominique Farge
- Hôpital Saint-Louis, centre de référence des maladies auto-immunes systémiques rares d'Île-de-France, filière FAI2R, IUH EA-3518, UF04, unité de médecine interne, maladies auto-immunes et pathologie vasculaire, 1, avenue Claude-Vellefaux, 75475 Paris, France.
| |
Collapse
|
16
|
Sprangers B, Decoo D, Dive D, Lysandropoulos A, Vanopdenbosch L, Bovy C. Management of adverse renal events related to alemtuzumab treatment in multiple sclerosis: a Belgian consensus. Acta Neurol Belg 2018; 118:143-151. [PMID: 29189966 PMCID: PMC5971040 DOI: 10.1007/s13760-017-0864-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Accepted: 11/14/2017] [Indexed: 12/04/2022]
Abstract
Alemtuzumab is a humanized monoclonal antibody indicated for the treatment of adult patients with relapsing–remitting multiple sclerosis with active disease. Multiple sclerosis (MS) patients treated with alemtuzumab are at increased risk for autoimmune adverse events (thyroid disorders, immune thrombocytopenia, and renal disease). The use of alemtuzumab has been associated with the development of renal immune-mediated adverse events in 0.3% of patients in clinical trials in MS, which generally occurred within 39 months of the last administration. Both anti-GBM disease and membranous nephropathy have been associated with the use of alemtuzumab. Early detection is necessary to allow for early diagnosis and prevent adverse renal and patient outcomes. Through the implementation of the risk minimization measures, patients can be diagnosed, and treated if needed, early allowing for generally favorable outcomes. This important goal can be reached through health care professional and patient education, careful analysis of the monthly lab tests, and close collaboration between the patient, neurologist, and the nephrologist. This article presents the consensus of Belgian MS specialists and nephrologists on the practicalities of diagnosis, management, and treatment of alemtuzumab-associated renal adverse events based on good clinical practice.
Collapse
Affiliation(s)
- Ben Sprangers
- Department of Nephrology, University Hospitals Leuven, Herestraat 49, 3000, Leuven, Belgium.
- Laboratory for Experimental Transplantation, Department of Microbiology and Immunology, University of Leuven, Leuven, Belgium.
| | - D Decoo
- Neurology Department, AZ Alma, Gentse Steenweg 132, 8340, Sijsele, Belgium
| | - D Dive
- Service de Neurologie, CHU Liège, Esneux, Belgium
| | - A Lysandropoulos
- Neuroimmunology, MS Unit, Neurology Department, CUB, Hôpital Erasme, Route de Lennik 808, 1070, Brussels, Belgium
| | - L Vanopdenbosch
- Department of Neurology, AZ Sint Jan Brugge Oostende, Ruddershove 10, 8000, Brugge, Belgium
| | - C Bovy
- Service de Néphrologie, CHU Sart-Tilman, B35, 4000, Liège, Belgium
| |
Collapse
|
17
|
Macdonell RAL, Aburashed RA, Alroughani R, Dive D, Izquierdo G, Kim HJ, Lycke J, Pozzilli C, Sharrack B, Vermersch P, Wiendl H, Lysandropoulos A, Chung L, Daizadeh N, Hunter SF. 054 Disability improvement is observed in each functional system in alemtuzumab-treated patients with active RRMS: results from CARE-MS II extension. J Neurol Neurosurg Psychiatry 2018. [DOI: 10.1136/jnnp-2018-anzan.53] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
IntroductionIn CARE-MS II (NCT00548405), alemtuzumab (12 mg/day, baseline: 5 days; 12 months later: 3 days) significantly improved clinical/MRI outcomes versus subcutaneous interferon beta-1a over 2 years in relapsing-remitting MS patients with inadequate response to prior therapy; significantly greater percentage of alemtuzumab-treated patients achieved 6 month confirmed disability improvement (CDI). Efficacy remained durable in a 4 year extension (NCT00930553). Here we assess alemtuzumab efficacy on disability at the level of functional systems (FS) scores of the Expanded Disability Status Scale (EDSS) over 6 years.MethodsEDSS and individual FS scores were recorded at baseline and quarterly; CDI (≥1.0 point EDSS decrease confirmed over 6 months) was assessed in patients with baseline EDSS score ≥2.0.ResultsOf the 393 patients who entered the extension, 338 (86%) remained on study through Year 6; 50% received neither alemtuzumab retreatment nor other disease-modifying therapy after the initial 2 courses. Through Years 3–6, 76%–80% of patients showed stable (≤0.5 point change) or improved (≥1.0 point decrease) EDSS scores versus core study mean (SD) baseline score of 2.7 (1.2);≥75% were stable/improved in each FS. Through Year 6, 43% achieved 6 month CDI and 96% of patients with CDI had an EDSS score <4. 71% of patients with CDI achieved improvements in >1 FS. Improvements were observed in each FS, most frequently occurring in the sensory (48%), pyramidal (44%), and cerebellar (44%) systems; 21%–25% showed improvements in the brainstem, cerebral, visual, and bowel/bladder FS.ConclusionMost (86%) CARE-MS II patients who entered the extension remained on the study through Year 6;≥75% of alemtuzumab-treated patients had improved/stable scores across all FS over 6 years. Improvements were seen for each FS in patients with 6 month CDI, with 71% showing improvements in >1 FS, indicating a broad treatment effect with alemtuzumab on multiple aspects of disability improvements.Study supportSanofi and Bayer HealthCare Pharmaceuticals.
Collapse
|
18
|
Laureys G, Willekens B, Vanopdenbosch L, Deryck O, Selleslag D, D'Haeseleer M, De Becker A, Dubois B, Dierickx D, Perrotta G, De Wilde V, van Pesch V, Straetmans N, Dive D, Beguin Y, Van Wijmeersch B, Theunissen K, Kerre T, Van de Velde A. A Belgian consensus protocol for autologous hematopoietic stem cell transplantation in multiple sclerosis. Acta Neurol Belg 2018. [PMID: 29536270 DOI: 10.1007/s13760-018-0905-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Multiple sclerosis is considered to be an immune mediated inflammatory disorder of the central nervous system. It mainly affects young, socioeconomic active patients. Although our armamentarium for this disease has significantly evolved in recent years some patients remain refractory to conventional therapies. In these cases, autologous hematopoietic stem cell transplantation can be considered as a therapeutic option. Decreasing morbidity, mortality, and increasing patient awareness have led to rising inquiry by our patients about this treatment option. With the aim of a standardized protocol and data registration, a Belgian working party on stem cell therapy in multiple sclerosis was established. In this paper, we report the consensus protocol of this working party on autologous hematopoietic stem cell transplantation in multiple sclerosis.
Collapse
Affiliation(s)
- Guy Laureys
- Department of Neurology, Ghent University Hospital, De Pintelaan 185, 9000, Ghent, Belgium.
| | - Barbara Willekens
- Department of Neurology, Antwerp University Hospital, Wilrijkstraat 10, 2650, Edegem, Belgium
| | - Ludo Vanopdenbosch
- Department of Neurology, AZ Sint Jan Brugge Oostende, Ruddershove 10, 8000, Brugge, Belgium
| | - Olivier Deryck
- Department of Neurology, AZ Sint Jan Brugge Oostende, Ruddershove 10, 8000, Brugge, Belgium
| | - Dominik Selleslag
- Department of Hematology, AZ Sint Jan Brugge Oostende, Ruddershove 10, 8000, Brugge, Belgium
| | - Miguel D'Haeseleer
- Department of Neurology, Center for Neurosciences, Universitair Ziekenhuis Brussel, Vrije Universiteit Brussel, Brussels, Belgium
| | - Ann De Becker
- Department of Hematology, UZ Brussel, Laarbeeklaan 101, 1090, Brussels, Belgium
| | - Bénédicte Dubois
- Department of Neurology, UZ Leuven, Herestraat 49, 3000, Louvain, Belgium
| | - Daan Dierickx
- Department of Hematology, UZ Leuven, Herestraat 49, 3000, Louvain, Belgium
| | - Gaetano Perrotta
- Unité de neuroimmunologie, Service de Neurologie, Hôpital Erasme-Université Libre de Bruxelles, Brussels, Belgium
| | - Virginie De Wilde
- Department of Hematology, Hôpital Erasme-Université Libre de Bruxelles, Brussels, Belgium
| | - Vincent van Pesch
- Department of Neurology, Cliniques universitaires Saint-Luc, Université Catholique de Louvain, Avenue Hippocrate 10, 1200, Brussels, Belgium
| | - Nicole Straetmans
- Department of Hematology, Cliniques universitaires Saint-Luc, Université Catholique de Louvain, Avenue Hippocrate 10, 1200, Brussels, Belgium
| | - Dominique Dive
- Department of Neurology, University Hospital of Liege, Rue Grandfosse 31-33, 4130, Esneux, Belgium
| | - Yves Beguin
- Department of Hematology, University of Liège, CHU Sart Tilman, 4000, Liège, Belgium
| | - Bart Van Wijmeersch
- Biomedical Institute, Hasselt University and Rehabilitation and MS-Centre Overpelt, Agoralaan Gebouw A, 3590, Diepenbeek, Belgium
| | - Koen Theunissen
- Department of Hematology, Jessa Ziekenhuis, Stadsomvaart 11, 3500, Hasselt, Belgium
| | - Tessa Kerre
- Department of Hematology, Ghent University Hospital, De Pintelaan 185, 9000, Ghent, Belgium
| | - Ann Van de Velde
- Department of Hematology, Antwerp University Hospital, Wilrijkstraat 10, 2650, Edegem, Belgium
| |
Collapse
|
19
|
Lambert C, Dubois B, Dive D, Lysandropoulos A, Selleslag D, Vanopdenbosch L, Van Pesch V, Vanwijmeersch B, Janssens A. Correction to: Management of immune thrombocytopenia in multiple sclerosis patients treated with alemtuzumab: a Belgian consensus. Acta Neurol Belg 2018; 118:141. [PMID: 29500681 DOI: 10.1007/s13760-018-0899-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The article Management of immune thrombocytopenia in multiple sclerosis patients treated with alemtuzumab: a Belgian consensus, written by Lambert et al., was originally published electronically on the publisher's internet portal on 27 January 2018 without open access.
Collapse
Affiliation(s)
- Catherine Lambert
- Department of Hematology, Cliniques Universitaires St Luc, Brussels, Belgium.
| | - Benedicte Dubois
- Department of Neurology, Universitaire Zienkenhuis Leuven, Leuven, Belgium
| | | | | | | | | | - Vincent Van Pesch
- Department of Neurology, Cliniques Universitaires St Luc, Brussels, Belgium
| | - Bart Vanwijmeersch
- Departement of Neurology, Rehabilitation and MS Center, Overpelt, Belgium
| | - Ann Janssens
- Department of Hematology, Universitaire Ziekenhuizen Leuven, Leuven, Belgium
| |
Collapse
|
20
|
Lambert C, Dubois B, Dive D, Lysandropoulos A, Selleslag D, Vanopdenbosch L, Van Pesch V, Vanwijmeersch B, Janssens A. Management of immune thrombocytopenia in multiple sclerosis patients treated with alemtuzumab: a Belgian consensus. Acta Neurol Belg 2018; 118:7-11. [PMID: 29380254 PMCID: PMC5857274 DOI: 10.1007/s13760-018-0882-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Accepted: 01/09/2018] [Indexed: 11/28/2022]
Abstract
Alemtuzumab (Lemtrada®) is a humanized monoclonal antibody indicated for the treatment of adult patients with relapsing–remitting multiple sclerosis with active disease defined by clinical or imaging features. Alemtuzumab demonstrated superior efficacy over active comparator in both treatment naive patients and those with inadequate response to prior therapy. Alemtuzumab is associated with a consistent and manageable safety and tolerability profile. Treatment with alemtuzumab for multiple sclerosis increases the risk for autoimmune adverse events including immune thrombocytopenia (ITP). Complete blood counts with differential should be obtained prior to initiation of treatment and at monthly intervals thereafter for 48 months after the last infusion. After this period of time, testing should be performed based on clinical findings suggestive of ITP. If ITP onset is confirmed, appropriate medical intervention should be promptly initiated, including immediate referral to a specialist. This paper presents the consensus of Belgian multiple sclerosis specialists and hematologists to guide the treating physician with practical recommendations.
Collapse
MESH Headings
- Alemtuzumab/adverse effects
- Antibodies, Monoclonal, Humanized/adverse effects
- Belgium
- Consensus
- Humans
- Multiple Sclerosis/drug therapy
- Practice Guidelines as Topic
- Purpura, Thrombocytopenic, Idiopathic/blood
- Purpura, Thrombocytopenic, Idiopathic/chemically induced
- Purpura, Thrombocytopenic, Idiopathic/diagnosis
- Purpura, Thrombocytopenic, Idiopathic/therapy
Collapse
Affiliation(s)
- Catherine Lambert
- Department of Hematology, Cliniques Universitaires St Luc, Brussels, Belgium.
| | - Benedicte Dubois
- Department of Neurology, Universitaire Zienkenhuis Leuven, Leuven, Belgium
| | | | | | | | | | - Vincent Van Pesch
- Department of Neurology, Cliniques Universitaires St Luc, Brussels, Belgium
| | - Bart Vanwijmeersch
- Departement of Neurology, Rehabilitation and MS Center, Overpelt, Belgium
| | - Ann Janssens
- Department of Hematology, Universitaire Ziekenhuizen Leuven, Leuven, Belgium
| |
Collapse
|
21
|
Smets I, Van Deun L, Bohyn C, van Pesch V, Vanopdenbosch L, Dive D, Bissay V, Dubois B. Corticosteroids in the management of acute multiple sclerosis exacerbations. Acta Neurol Belg 2017; 117:623-633. [PMID: 28391390 DOI: 10.1007/s13760-017-0772-0] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Accepted: 03/12/2017] [Indexed: 11/29/2022]
Abstract
Multiple sclerosis (MS) is an autoimmune, inflammatory demyelinating disease of the central nervous system characterized in the majority of the patients by a relapsing-remitting disease course. For decades high-dosage corticosteroids (CS) are considered the cornerstone in the management of acute MS relapses. However, many unanswered questions remain when it comes to the exact modalities of CS administration. In this review on behalf of the Belgian Study Group for MS we define the efficacy of CS in reducing MS-related morbidity and examine whether the effect is different according to type of CS, route of administration, cumulative dosage, timing of initiation and disease course. We also review the use of CS in combination with other MS treatments and during pregnancy and lactation. Furthermore, we delineate the relevant adverse events due to a pulse CS regimen and present a decision tree that can be used when treating MS relapses in clinical practice.
Collapse
Affiliation(s)
- I Smets
- Department of Neurology, University Hospitals Leuven, Herestraat 49, 3000, Louvain, Belgium.
| | - L Van Deun
- Department of Neurology, University Hospitals Brussels, Laarbeeklaan 101, Jette, Belgium
| | - C Bohyn
- Department of Radiology, University Hospitals Leuven, Herestraat 49, Louvain, Belgium
| | - V van Pesch
- Department of Neurology, Cliniques Universitaires Saint-Luc, Hippokrateslaan 10, Sint-Lambrechts-Woluwe, Belgium
| | - L Vanopdenbosch
- Department of Neurology, Hospital AZ Sint-Jan, Ruddershove 10, Brugge, Belgium
| | - D Dive
- Neuroimmunological and Rehabilitation Unit, University Hospitals Liège, Avenue de L'Hòpital 1, Liège, Belgium
| | - V Bissay
- Department of Neurology, University Hospitals Brussels, Laarbeeklaan 101, Jette, Belgium
| | - B Dubois
- Department of Neurology, University Hospitals Leuven, Herestraat 49, 3000, Louvain, Belgium
| |
Collapse
|
22
|
Giffroy X, Maes N, Albert A, Maquet P, Crielaard JM, Dive D. Multimodal evoked potentials for functional quantification and prognosis in multiple sclerosis. BMC Neurol 2016; 16:83. [PMID: 27245221 PMCID: PMC4888661 DOI: 10.1186/s12883-016-0608-1] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2015] [Accepted: 05/23/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Functional biomarkers able to identify multiple sclerosis (MS) patients at high risk of fast disability progression are lacking. The aim of this study was to evaluate the ability of multimodal (upper and lower limbs motor, visual, lower limbs somatosensory) evoked potentials (EP) to monitor disease course and identify patients exposed to unfavourable evolution. METHODS One hundred MS patients were assessed with visual, somatosensory and motor EP and rated on the Expanded Disability Status Scale (EDSS) at baseline (T0) and about 6 years later (T1). The Spearman correlation (rS) was used to evaluate the relationship between conventional EP scores and clinical findings. Multiple (logistic) regression analysis estimated the predictive value of baseline electrophysiological data for three clinical outcomes: EDSS, annual EDSS progression, and the risk of EDSS worsening. RESULTS In contrast to longitudinal correlations, cross-sectional correlations between the different EP scores and EDSS were all significant (0.33 ≤ rS < 0.67, p < 0.001). Baseline global EP score and EDSS were highly significant predictors (p < 0.0001) of EDSS progression 6 years later. The baseline global EP score was found to be an independent predictor of the EDSS annual progression rate (p < 0.001), and of the risk of disability progression over time (p < 0.005). Based on a ROC curve determination, we defined a Global EP Score cut off point (17/30) to identify patients at high risk of disability progression illustrated by a positive predictive value of 70%. CONCLUSION This study provides a proof of the concept that electrophysiology could be added to MRI and used as another complementary prognostic tool in MS patients.
Collapse
Affiliation(s)
- Xavier Giffroy
- Department of Neurology, University Hospital of Liege, Rue Grandfosse 31-33, 4130, Esneux, Belgium.
- Department of Physical Medicine and Rehabilitation, University Hospital of Liege, B35, 4000, Liege, Belgium.
| | - Nathalie Maes
- Department of Biostatistics and Medico-Economic Information, University Hospital (CHU, ULg) of Liege, B35, 4000, Liège, Belgium
| | - Adelin Albert
- Department of Biostatistics and Medico-Economic Information, University Hospital (CHU, ULg) of Liege, B35, 4000, Liège, Belgium
| | - Pierre Maquet
- Department of Neurology, University Hospital of Liege, Rue Grandfosse 31-33, 4130, Esneux, Belgium
| | - Jean-Michel Crielaard
- Department of Physical Medicine and Rehabilitation, University Hospital of Liege, B35, 4000, Liege, Belgium
| | - Dominique Dive
- Department of Neurology, University Hospital of Liege, Rue Grandfosse 31-33, 4130, Esneux, Belgium
| |
Collapse
|
23
|
Dive D, Giffroy X, Ernon C, Tshibanda JF, Van Hecke W. Application des techniques de volumétrie cérébrale dans le suivi clinique des patients atteints de sclérose en plaques. Rev Neurol (Paris) 2016. [DOI: 10.1016/j.neurol.2016.01.306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
24
|
Benmouna K, Dive D, Wang F, Martin D, Crielaard JM, Kaux JF. [Is this cerebral cavernoma the cause of a Parkinsonian syndrome?]. Rev Med Liege 2013; 68:613-616. [PMID: 24564025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We report the case of a patient presenting with an akineto-rigid syndrome of the left hemibody whose etiological exploration by magnetic resonance imaging showed the presence of a cavernoma located in the right lenticular region. The interest of this situation is to establish if there is a pathophysiological link between such symptoms and the lesion revealed by the MRI.
Collapse
Affiliation(s)
- K Benmouna
- Service de Médecine Physique, CHU de Liège, Belgique
| | - D Dive
- Service de Neurologie, CHU O-A, Belgique
| | - F Wang
- Service de Médecine Physique, CHU de Liège, Belgique
| | - D Martin
- Service de Neurochirurgie, CHU de Liège, Belgique
| | - J M Crielaard
- Service de Médecine Physique, CHU de Liège, Belgique
| | - J F Kaux
- Service de Médecine Physique, CHU de Liège, Belgique
| |
Collapse
|
25
|
Garraux G, Caberg JH, Vanbellinghen JF, Jamar M, Bours V, Moonen G, Dive D. Partial trisomy 4q associated with young-onset dopa-responsive parkinsonism. ACTA ACUST UNITED AC 2012; 69:398-400. [PMID: 22410449 DOI: 10.1001/archneurol.2011.802] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
OBJECTIVE To describe a patient who developed a young-onset, dopa-responsive parkinsonism linked to a de novo heterozygous interstitial duplication 4q. DESIGN Case report. SETTING Movement Disorder Outpatient Clinic at the University Hospital Centre, Liège, Belgium. PATIENT A 31-year-old woman. MAIN OUTCOME MEASURES Clinical, neuroimaging, and genetic data. RESULTS The duplicated region contains 150 known genes, including the α-synuclein (SNCA) gene locus. Motor and 6-[(18)F]fluoro-L-dopa positron emission tomography features are similar to those previously reported in heterozygote SNCA duplication carriers. Altered expression of other genes contained in the duplicated region may contribute to clinical features that are uncommon in the phenotypic spectrum of SNCA multiplications such as delayed developmental psychomotor milestones during infancy and musculoskeletal abnormalities. CONCLUSION This case report provides new insights on the genetic basis of parkinsonism.
Collapse
Affiliation(s)
- Gaëtan Garraux
- MOVERE Group, Department of Neurology, University Hospital Center of Liège, and Cyclotron Research Center, University of Liège, Belgium.
| | | | | | | | | | | | | |
Collapse
|
26
|
Abstract
Ferroquine (FQ, SSR97193) is currently the most advanced organometallic drug candidate and about to complete phase II clinical trials as a treatment for uncomplicated malaria. This ferrocenecontaining compound is active against both chloroquine-susceptible and chloroquine-resistant Plasmodium falciparum and P. vivax strains and/or isolates. This article focuses on the discovery of FQ, its antimalarial activity, the hypothesis of its mode of action, the current absence of resistance in vitro and recent clinical trials.
Collapse
Affiliation(s)
- C Biot
- Unité de Catalyse et Chimie du Solide, CNRS UMR 8181, Université Lille Nord de France.
| | | | | | | | | | | |
Collapse
|
27
|
Kaux JF, Lenelle J, Frippiat F, Le Goff C, Bartsch V, Crielaard JM, Dive D. [Dorsal Septic metastasis of the initial retropharyngeal abscess responsible for a tétraparésie]. Rev Neurol (Paris) 2011; 167:638-40. [PMID: 21497363 DOI: 10.1016/j.neurol.2011.03.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2010] [Revised: 02/21/2011] [Accepted: 03/08/2011] [Indexed: 10/18/2022]
|
28
|
Acroute Dit Vampouille A, Lafitte S, Dive D, Khalife J, Pierrot C. A role for CD4+ and CD8+ cells and not for CD25+ cells in the control ofPlasmodium bergheiAnka blood stage parasites in rats. Parasite 2010; 17:53-60. [DOI: 10.1051/parasite/2010171053] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
29
|
Wauters O, Scholtes F, Dive D, Moonen G. [Image of the month. A case of rapidly progressing leukoencephalopathy in amyloid angiopathy]. Rev Med Liege 2006; 61:3-4. [PMID: 16491539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Affiliation(s)
- O Wauters
- Service de Neurologie, CHU Sart-Tilman, B-4000 Liège
| | | | | | | |
Collapse
|
30
|
Dive D, Lievens I, Moonen G, Wang FC. [Diabetic peripheral neuropathy]. Rev Med Liege 2005; 60:490-7. [PMID: 16035316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Peripheral neuropathy is a very frequent consequence of diabetes mellitus. Its clinical expression is quite variable. A specific therapy is sometimes necessary. Early diagnosis of diabetic neuropathy is a cornerstone of patient's follow-up. Differential diagnosis of diabetic neuropathy is sometimes difficult from another type of neuropathy or a focal, even systemic, disease. It is mandatory to know how a diabetic neuropathy may express. Pathophysiological mechanisms involved in diabetic neuropathy are complex and interrelated. Hyperglycaemia alone, even mild or moderate, vascular disorders and dysimmune factors may be combined to induce axonal injury. Glycaemic control is the cornerstone of effective treatment for neuropathy associated with diabetes. Specific pain control and therapies of autonomic disturbances are regularly required.
Collapse
Affiliation(s)
- D Dive
- Service de Neurologie, CHU de Liège.
| | | | | | | |
Collapse
|
31
|
Dive D, Giffroy X. [Somatosensory evoked potentials: clinical applications in peripheral neuropathies]. Rev Med Liege 2004; 59 Suppl 1:157-69. [PMID: 15244172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/30/2023]
Abstract
Somatosensory evoked potentials (SSEP) offer a reliable measurement of peripheral and central sensory conduction through the stimulation of mixed or purely sensitive nerves. If their interest is well known for the evaluation of central pathologies (cerebral or spinal), their precise indication and application field in peripheral neuropathies remains unclear. Some specific diseases, like lumbar or cervical radiculopathies or brachial plexopathies, have been extensively studied and large series have been reported in the literature. Relative sensitivity and specificity of SSEPs and electroneuromyography (ENMG) is a matter of debate for specific peripheral nerve affections. We present a practical approach in which SSEPs and ENMG data are integrated toward a better diagnosis. Clinical histories are exposed as an illustrative demonstration of specific interest for combined SSEPs and ENMG in the patient's functional evaluation and follow-up.
Collapse
Affiliation(s)
- D Dive
- Service de Neurologie, CHU Liège.
| | | |
Collapse
|
32
|
Delhaes L, Abessolo H, Biot C, Berry L, Delcourt P, Maciejewski L, Brocard J, Camus D, Dive D. In vitro and in vivo antimalarial activity of ferrochloroquine, a ferrocenyl analogue of chloroquine against chloroquine-resistant malaria parasites. Parasitol Res 2001; 87:239-44. [PMID: 11293573 DOI: 10.1007/s004360000317] [Citation(s) in RCA: 96] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Previous studies have shown that ferrochloroquine (FQ) exhibited an antimalarial activity against Plasmodium spp. The present work confirmed this activity, described the curative effect on P. vinckei and investigated the FQ toxicity in vitro and in vivo. The in vitro and in vivo growth inhibition of P. falciparum and P. berghei N, respectively, showed that FQ antimalarial activity was 1.5-10 times more potent than chloroquine. FQ completely inhibited the in vivo development of both chloroquine-susceptible and resistant P. vinckei strains and protected mice from lethal infection at a dose of 8.4 mg kg(-1) day(-1) given for 4 days subcutaneously or orally. This curative effect was 5-20 times more potent than chloroquine, according to the strains' resistance to chloroquine. At this curative dose, no clinical changes were observed in mice up to 14 days after the last administration. Nevertheless, the acute toxicity and lethality of ferrochloroquine seemed to be dependent on gastric surfeit. The FQ security index determined in vitro confirmed that it might be a promising compound.
Collapse
Affiliation(s)
- L Delhaes
- INSERM Unité 167, Institut Pasteur, Lille, France
| | | | | | | | | | | | | | | | | |
Collapse
|
33
|
Delhaes L, Blot C, Berry L, Maciejewski LA, Camus D, Brocard JS, Dive D. Novel ferrocenic artemisinin derivatives: synthesis, in vitro antimalarial activity and affinity of binding with ferroprotoporphyrin IX. Bioorg Med Chem 2000; 8:2739-45. [PMID: 11131165 DOI: 10.1016/s0968-0896(00)00206-6] [Citation(s) in RCA: 70] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Following our search for novel compounds with high antimalarial activity, a series of artemisinin (QHS) derivatives containing a ferrocenic nucleus was prepared and tested in vitro against Plasmodium falciparum strains. Two new metallocenic derivatives (1 and 3) were found as potent as QHS. All compounds showed a capacity to bind with ferroprotoporphyrin IX. A decrease in the Soret band absorbance of ferroprotoporphyrin IX, resulting from the addition of different drugs concentrations, was shown. The association stoichiometry of compounds to ferroprotoporphyrin IX appears to be 1:2 at equilibrium, with an intermediate 1:1 complexation. These results appear to strengthen the role of adducts between artemisinin derivatives and heme in generation of artemisinin radicals. Such interaction of artemisinin ferrocenyl derivatives with ferroprotoporphyrin IX and its biological significance could form a basis in future drug development.
Collapse
Affiliation(s)
- L Delhaes
- INSERM U.42, Villeneuve d'Ascq, France
| | | | | | | | | | | | | |
Collapse
|
34
|
Biot C, Delhaes L, Maciejewski LA, Mortuaire M, Camus D, Dive D, Brocard JS. Synthetic ferrocenic mefloquine and quinine analoguesas potential antimalarial agents. Eur J Med Chem 2000; 35:707-14. [PMID: 10960186 DOI: 10.1016/s0223-5234(00)00178-1] [Citation(s) in RCA: 87] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A few years ago we proposed a strategy for the synthesis of new ferrocene-chloroquine analogues replacing the carbon chain of chloroquine by hydrophobic ferrocenyl moieties. Now, this strategy has been applied to the antimalarial amino-alcohols class to afford new potentially active analogues of mefloquine and quinine bearing a substituted ferrocenic group. The pathway used for the synthesis of the mefloquine analogues includes the coupling of an aminomethyl substituted ferrocene carboxaldehyde with a lithio quinoline compound. On the other hand, the synthesis of quinine analogues was ensured by the 'inverse' reaction of a lithio aminomethyl ferrocene with a quinoline carboxaldehyde. The configurations of each diastereoisomer were unambiguously determined by spectroscopic data. The mechanistic interpretations were fully discussed. Ferrocenyl analogues of mefloquine and quinine exhibited a lower antimalarial activity than mefloquine and quinine themselves. Comparing optical isomers, those isomers dissimilar to ferrocenyl derivatives presented better antimalarial activities than those similar to ferrocenyl.
Collapse
Affiliation(s)
- C Biot
- Laboratoire de catalyse de Lille, groupe de synthèse organométallique, UPRESA 8010, école nationale supérieure de chimie de Lille, bâtiment C7 université des sciences et technologies BP 108, Villeneuve, France
| | | | | | | | | | | | | |
Collapse
|
35
|
Odberg-Ferragut C, Renault JP, Viscogliosi E, Toursel C, Briche I, Engels A, Lepage G, Morgenstern-Badarau I, Camus D, Tomavo S, Dive D. Molecular cloning, expression analysis and iron metal cofactor characterisation of a superoxide dismutase from Toxoplasma gondii. Mol Biochem Parasitol 2000; 106:121-9. [PMID: 10743616 DOI: 10.1016/s0166-6851(99)00211-x] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
A genomic region of 12 kb encompassing the gene encoding the superoxide dismutase (SOD) of Toxoplasma gondii has been cloned. The gene contains four exons of 121, 42, 381 and 59 bp which are separated by three introns of 321, 202, and 577 bp, respectively. The open reading frame can be translated into a protein of 201 amino acids with a molecular mass of 22.6 kDa. Alignment indicated that it is a FeSOD, a type only found in bacteria, protozoa and chloroplast of higher plants. Recombinant SOD was expressed in a Escherichia coli double mutant lacking both MnFeSOD and FeSODs. The presence of iron as metal cofactor was confirmed by measurements of iron by absorption mass spectrometry and electron paramagnetic resonance studies. Semi-quantitative reverse transcribed polymerase chain reaction experiments showed a similar amount of SOD transcripts in two developmental stages of T. gondii. Antibodies raised against the purified recombinant protein detected SOD protein in both bradyzoite and tachyzoite forms suggesting this SOD might be essential for the intracellular growth of both developmental stages. Southern blot analysis indicated that SOD occured as a single copy gene in T. gondii genome.
Collapse
|
36
|
Baert CB, Deloron P, Viscogliosi E, Dauchez M, Camus D, Dive D. Analysis of genetic diversity at the iron-containing superoxide dismutase locus in Plasmodium falciparum wild isolates. FEMS Microbiol Lett 1999; 181:237-43. [PMID: 10585544 DOI: 10.1111/j.1574-6968.1999.tb08850.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
In order to investigate the genetic diversity of iron-containing superoxide dismutase (FeSOD) from Plasmodium falciparum, a potential anti-malarial therapeutic target, we cloned and sequenced Plasmodium FeSOD from 26 blood samples from non-infected patients. Fifteen clones had the same nucleotide sequence as that of the FeSOD gene of the P. falciparum strain HB3 cultivated in vitro. The other 11 clones presented mutations responsible for punctual amino acid changes which did not modify key residues for the function or the structure of the enzyme. The high sequence conservation between FeSOD from the isolates confirms that this enzyme could represent a therapeutic target.
Collapse
Affiliation(s)
- C B Baert
- Centre International de Recherches Médicales de Franceville, BP 769, Franceville, Gabon
| | | | | | | | | | | |
Collapse
|
37
|
Baert CB, Deloron P, Viscogliosi E, Delgado-Viscogliosi P, Camus D, Dive D. Cloning and characterization of iron-containing superoxide dismutase from the human malaria species Plasmodium ovale, P. malariae and P. vivax. Parasitol Res 1999; 85:1018-24. [PMID: 10599926 DOI: 10.1007/s004360050675] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
The iron-containing superoxide dismutase (FeSOD) gene from three human malaria species, namely Plasmodium ovale, P. malariae and P. vivax, was amplified by polymerase chain reaction, cloned and then sequenced. Comparisons of their deduced amino acid sequences with that of the FeSOD from P. falciparum revealed a very low polymorphism at the FeSOD locus in human malaria species. One P. ovale and the P. vivax FeSOD genes presented the same nucleotide sequence as that of the P. falciparum strain HB3 whereas the second P. ovale and the P. malariae genes exhibited two punctual mutations. These mutations did not affect the function and structure of the enzyme. The FeSOD polymorphism was so low that no phylogenetic relationship among human malaria species could be proposed, but this conservative structure strengthened the potentiality of this enzyme as a possible target for antimalarial drugs.
Collapse
Affiliation(s)
- C B Baert
- Centre International de Recherches Médicales de Franceville, Gabon
| | | | | | | | | | | |
Collapse
|
38
|
Biot C, Delhaes L, N'Diaye CM, Maciejewski LA, Camus D, Dive D, Brocard JS. Synthesis and antimalarial activity in vitro of potential metabolites of ferrochloroquine and related compounds. Bioorg Med Chem 1999; 7:2843-7. [PMID: 10658588 DOI: 10.1016/s0968-0896(99)00224-2] [Citation(s) in RCA: 93] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
In man, the two major metabolites of the antimalarial drug chloroquine (CQ) are monodesethylchloroquine (DECQ) and didesethylchloroquine (di-DECQ). By analogy with CQ, the synthesis and the in vitro tests of some amino derivatives of ferrochloroquine (FQ), a ferrocenic analogue of CQ which are presumed to be the oxidative metabolites of FQ, are reported. Desmethylferrochloroquine 1a and didesmethylferrochloroquine 2 would be more potent against schizontocides than CQ in vitro against two strains (HB3 and Dd2) of Plasmodium falciparum. Other secondary amino derivatives have been prepared and proved to be active as antimalarial agents in vitro, too.
Collapse
Affiliation(s)
- C Biot
- Laboratoire de Catalyse, Groupe de Synthèse Organométallique, UPRESA 8010, ENSCL, Université des Sciences et Technologies, Villeneuve D'Ascq, France.
| | | | | | | | | | | | | |
Collapse
|
39
|
Biot C, Delhaes L, Abessolo H, Domarle O, Maciejewski L, Mortuaire M, Delcourt P, Deloron P, Camus D, Dive D, Brocard J. Novel metallocenic compounds as antimalarial agents. Study of the position of ferrocene in chloroquine. J Organomet Chem 1999. [DOI: 10.1016/s0022-328x(99)00302-2] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
40
|
Abstract
The role of endogenous and internalized catalase in the protection of Plasmodium against oxidant stress was studied. Catalase activities were measured in isolated Plasmodium falciparum at different stages of intererythrocytic development. Activities measured at late schizont stages were compared to parasite markers (glutamate dehydrogenase, SOD) and to red blood cell markers (haemoglobin, Cu/Zn-SOD). The fate of the host cell catalase in the parasite digestive system was studied by immunoelectron microscopy using monoclonal antibodies. The internalized catalase appeared to be dissociated in the digestive system of the parasite and inactivated. To examine the protective role of the endogenous and internalized catalase in the parasite protection against oxidant stress, parasites were cultivated at two oxygen concentrations (5% and 20%) in inhibited catalase red blood cells. These experiments suggested that the catalases present both in red blood cell and parasite are not essential when parasites are cultivated under 5% oxygen, but are necessary to protect the parasite under 20% oxygen. Catalase may not be the main protective enzyme involved in the protection of P. falciparum in standard in vitro culture conditions, but may become critical under the higher oxygen tensions conditions encountered in vivo.
Collapse
|
41
|
Denis CM, Guyot K, Wakefield AE, Dive D, Dei-Cas E, Camus D, Odberg-Ferragut C. Molecular cloning and characterization of a superoxide dismutase (sod) gene in Pneumocystis carinii. J Eukaryot Microbiol 1998; 45:475-83. [PMID: 9783449 DOI: 10.1111/j.1550-7408.1998.tb05103.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
This work reports the isolation and characterization of a gene encoding a superoxide dismutase (SOD, EC.1.15.1.1.) from Pneumocystis carinii derived from rat. Sense and antisense oligonucleotides, deduced from SOD amino acid sequences from a wide variety of organisms, allowed amplification of a 669 bp genomic DNA fragment specific to this P. carinii. RACE-PCR was used to obtain the major part of the complementary DNA; the 5'- and 3'-genomic regions were obtained respectively from a Mbol subgenomic library and from an amplified fragment using oligonucleotides designed from the cDNA sequence. Comparison of genomic and cDNA sequences showed an open reading frame of 660 bp interrupted by seven small introns. The deduced amino acid sequence contained 220 residues. Protein sequence alignment demonstrated the highest homology (50.5% identity; 70.3% similarity) with Saccharomyces cerevisiae manganese-SOD (MnSOD) suggesting that P. carinii SOD belongs to the mitochondrial MnSOD group. A putative targeting peptide found at the 5'-end of the P. carinii SOD sequence also suggested its mitochondrial localization.
Collapse
Affiliation(s)
- C M Denis
- INSERM U42, Villeneuve d'Ascq, France.
| | | | | | | | | | | | | |
Collapse
|
42
|
Viscogliosi E, Delgado-Viscogliosi P, Gerbod D, Dauchez M, Gratepanche S, Alix AJ, Dive D. Cloning and expression of an iron-containing superoxide dismutase in the parasitic protist, Trichomonas vaginalis. FEMS Microbiol Lett 1998; 161:115-23. [PMID: 9561738 DOI: 10.1111/j.1574-6968.1998.tb12936.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
A superoxide dismutase (SOD) gene of the parasitic protist Trichomonas vaginalis was cloned, sequenced, expressed in Escherichia coli, and its gene product characterized. It is an iron-containing dimeric protein with a monomeric mass of 22,067 Da. Southern blots analyses suggested the presence of seven iron-containing (FeSOD) gene copies. Hydrophobic cluster analysis revealed some peculiarities in the 2D structure of the FeSOD from T. vaginalis and a strong structural conservation between prokaryotic and eukaryotic FeSODs. Phylogenetic reconstruction of the SOD sequences confirmed the dichotomy between FeSODs and manganese-containing SODs. FeSODs of protists appeared to group together with homologous proteobacterial enzymes suggesting a possible origin of eukaryotic FeSODs through an endosymbiotic event.
Collapse
Affiliation(s)
- E Viscogliosi
- Laboratoire de Biologie des Protistes, UPRESA 6023 CNRS, Aubière, France.
| | | | | | | | | | | | | |
Collapse
|
43
|
Clarebout G, Gamain B, Precigout E, Gorenflot A, Slomianny C, Camus D, Dive D. Babesia hylomysci and B. divergens: presence of antioxidant enzymes destroying hydrogen peroxide. Parasitol Res 1998; 84:75-7. [PMID: 9491431 DOI: 10.1007/s004360050360] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Catalase and glutathione peroxidase (Gpx), two enzymes destroying hydrogen peroxide, were reported in two Babesia species: B. divergens cultivated in vitro and B. hylomysci obtained in vivo. On the use of specific substrate and inhibitor, we confirmed that the Gpx activity detected was selenium-dependent. Moreover, the two Babesia species contain glutamate dehydrogenase activity. This enzyme is capable of providing to the cell the reduced nicotinamide adenine dinucleotide phosphate (NADPH) necessary for regeneration of the reduced glutathione. Gpx activity is weaker in B. divergens than in B. hylomysci and seems to be compensated by higher levels of catalase activity. Such a balance between the two enzymes may depend on the selenium concentration available for the parasite.
Collapse
|
44
|
Dive D, Poirrier R, Maquet P, Claes F, Franck G. Analyse topographique et quantifiée des rythmes du sommeil lent léger chez des patients souffrant d'une lésion thalamique. Neurophysiol Clin 1997. [DOI: 10.1016/s0987-7053(97)89887-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
|
45
|
Dive D, Gillet S, Claes F, Poirrier R, Franck G. Analyse topographique des fuseaux du stade 2 du sommeil chez le sujet normal. Neurophysiol Clin 1997. [DOI: 10.1016/s0987-7053(97)89880-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
|
46
|
Viscogliosi E, Durieux I, Delgado-Viscogliosi P, Bayle D, Dive D. Phylogenetic implication of iron-containing superoxide dismutase genes from trichomonad species. Mol Biochem Parasitol 1996; 80:209-214. [PMID: 8892298 DOI: 10.1016/0166-6851(96)02685-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- E Viscogliosi
- Laboratoire de Biologie des Protistes, URA CNRS, Université Blaise Pascal de Clermont-Ferrand, Aubière, France
| | | | | | | | | |
Collapse
|
47
|
Denis CM, Odberg-Ferragut C, Guyot K, Dei-Cas E, Camus D, Dive D. Manganese-cofactored superoxide dismutase activity in rat-derived Pneumocystis carinii. J Eukaryot Microbiol 1996; 43:26S. [PMID: 8822830 DOI: 10.1111/j.1550-7408.1996.tb04963.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- C M Denis
- U42 INSERM, BP 39, Villeneuve d'Ascq, France
| | | | | | | | | | | |
Collapse
|
48
|
Gamain B, Langsley G, Fourmaux MN, Touzel JP, Camus D, Dive D, Slomianny C. Molecular characterization of the glutathione peroxidase gene of the human malaria parasite Plasmodium falciparum. Mol Biochem Parasitol 1996; 78:237-48. [PMID: 8813693 DOI: 10.1016/s0166-6851(96)02632-1] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
In this paper we report the isolation and the characterization of a gene encoding the antioxidant enzyme glutathione peroxidase from the human malaria parasite Plasmodium falciparum. This gene contains two introns of 208 and 168 bp and is present in a single copy on chromosome 13. The open reading frame encodes a protein with a predicted length of 205 amino acids, which possesses a potential cleavage site between residues 21 and 22 after a hydrophobic region with the characteristics of a signal sequence. Therefore, the mature protein is predicted to be 184 residues long with a molecular mass of 21404 Da. In comparison with other known glutathione peroxidases many amino acid residues implicated in catalysis are conserved in the malarial enzyme. Phylogenetic analysis indicates that the deduced protein sequence is more closely related to plant glutathione peroxidase and phospholipid hydroperoxide glutathione peroxidase. A 1.5-kb transcript was identified in asynchronous erythrocytic stages.
Collapse
Affiliation(s)
- B Gamain
- Institut National de la Santé et de la Recherche Médicale Unité 42, Villeneuve d'Ascq, France
| | | | | | | | | | | | | |
Collapse
|
49
|
Clarebout G, Gamain B, Slomianny C, Camus D, Dive D. The course of Plasmodium berghei, P. chabaudi and P. yoelii infections in beta-thalassaemic mice. Parasitology 1996; 112 ( Pt 3):269-76. [PMID: 8728990 DOI: 10.1017/s0031182000065781] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
In order to study the effects of acclimatization of Plasmodium in beta-thalassaemic mice, we used a mouse model of beta-thalassaemia (DBA/2J/beta-thal/beta-thal), similar to that observed in humans. We acclimatized 3 rodent malarias (P. berghei, P. chabaudi and P. yoelii) in DBA/2J and DBA/2J/beta-thal mice lines, by 4 intraperitoneal serial transfers. All 3 rodent malarias developed in red blood cells of beta-thalassaemic mice without losing their virulence. There was no delay in infection and peaks of parasitaemia were similar in beta-thalassaemic and normal mice. The mortality occurred earlier in beta-thalassaemic mice than in control mice for P. berghei and P. chabaudi. The difference was more pronounced for P. yoelii NS where normal mice did not die. These results could be explained by a failure of erythropoiesis in beta-thalassaemic mice, which are unable to compensate for the destruction of red blood cells by the parasites, and the mice died of anaemia. Ultrastructural examination of the rodent malaria parasites in beta-thalassaemic RBC showed a normal development even in the presence of Heinz bodies. In conclusion, no effective protection against malaria was provided by the beta-thalassaemia in this mouse model.
Collapse
|
50
|
Bécuwe P, Gratepanche S, Fourmaux MN, Van Beeumen J, Samyn B, Mercereau-Puijalon O, Touzel JP, Slomianny C, Camus D, Dive D. Characterization of iron-dependent endogenous superoxide dismutase of Plasmodium falciparum. Mol Biochem Parasitol 1996; 76:125-34. [PMID: 8920001 DOI: 10.1016/0166-6851(95)02552-9] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Two main superoxide dismutase activities at isoelectric points (pI) 6.2 and 6.8 and two minor at pI 5.6 and 6.4 were found in crude extracts of Plasmodium falciparum. These activities were cyanide-resistant and hydrogen peroxide-sensitive and represented 20-30% of the total SOD activity found in the crude extract. A fragment of 424 bp, amplified from genomic DNA from P. falciparum, was cloned and sequenced. The deduced amino acid sequence identified this fragment as a coding region of an SOD gene. A cDNA corresponding to SOD was then isolated from a P. falciparum cDNA library and sequenced. The deduced amino acid sequence of SOD (197 aa) was compared with 32 known Feor Mn-SODs by the 'DARWIN' system. This analysis showed that the parasitic enzyme was related to typical Fe-SODs. The SOD subunit was purified and the N-terminal sequence, determined up to 29 residues, corresponded to that of cDNA isolated. The iron-dependent SOD activity found in Plasmodium falciparum represents the first level of the antioxidant defence system of the parasite. It is also the first SOD characterized in the parasitic Apicomplexa phylum whose sequence can be compared to equivalent iron-dependent enzymes known in other protozoa and bacteria.
Collapse
Affiliation(s)
- P Bécuwe
- INSERM U42, Villeneuve d'Ascq, France
| | | | | | | | | | | | | | | | | | | |
Collapse
|