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Beckers L, Baeten P, Popescu V, Swinnen D, Cardilli A, Hamad I, Van Wijmeersch B, Tavernier SJ, Kleinewietfeld M, Broux B, Fraussen J, Somers V. Alterations in the innate and adaptive immune system in a real-world cohort of multiple sclerosis patients treated with ocrelizumab. Clin Immunol 2024; 259:109894. [PMID: 38185268 DOI: 10.1016/j.clim.2024.109894] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 12/22/2023] [Accepted: 01/03/2024] [Indexed: 01/09/2024]
Abstract
B cell depletion by the anti-CD20 antibody ocrelizumab is effective in relapsing-remitting (RR) and primary progressive (PP) multiple sclerosis (MS). We investigated immunological changes in peripheral blood of a real-world MS cohort after 6 and 12 months of ocrelizumab. All RRMS and most PPMS patients (15/20) showed treatment response. Ocrelizumab not only reduced CD20+ B cells, but also numbers of CD20+ T cells. Absolute numbers of monocytes, dendritic cells and CD8+ T cells were increased, while CD56hi natural killer cells were reduced after ocrelizumab. The residual B cell population shifted towards transitional and activated, IgA+ switched memory B cells, double negative B cells, and antibody-secreting cells. Delaying the treatment interval by 2-3 months increased mean B cell frequencies and enhanced naive B cell repopulation. Ocrelizumab reduced plasma levels of interleukin(IL)-12p70 and interferon(IFN)-α2. These findings will contribute to understanding ineffective treatment responses, dealing with life-threatening infections and further unravelling MS pathogenesis.
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Affiliation(s)
- L Beckers
- University MS Center (UMSC), Hasselt-Pelt, Hasselt, Belgium; Department of Immunology and Infection, Biomedical Research Institute, Hasselt University, Hasselt, Belgium
| | - P Baeten
- University MS Center (UMSC), Hasselt-Pelt, Hasselt, Belgium; Department of Immunology and Infection, Biomedical Research Institute, Hasselt University, Hasselt, Belgium
| | - V Popescu
- University MS Center (UMSC), Hasselt-Pelt, Hasselt, Belgium; Department of Immunology and Infection, Biomedical Research Institute, Hasselt University, Hasselt, Belgium; Noorderhart, Rehabilitation and MS Center, Pelt, Belgium
| | - D Swinnen
- University MS Center (UMSC), Hasselt-Pelt, Hasselt, Belgium; Department of Immunology and Infection, Biomedical Research Institute, Hasselt University, Hasselt, Belgium; VIB Laboratory of Translational Immunomodulation, Center for Inflammation Research (IRC), Diepenbeek, Belgium
| | - A Cardilli
- University MS Center (UMSC), Hasselt-Pelt, Hasselt, Belgium; Department of Immunology and Infection, Biomedical Research Institute, Hasselt University, Hasselt, Belgium; VIB Laboratory of Translational Immunomodulation, Center for Inflammation Research (IRC), Diepenbeek, Belgium
| | - I Hamad
- University MS Center (UMSC), Hasselt-Pelt, Hasselt, Belgium; Department of Immunology and Infection, Biomedical Research Institute, Hasselt University, Hasselt, Belgium; VIB Laboratory of Translational Immunomodulation, Center for Inflammation Research (IRC), Diepenbeek, Belgium
| | - B Van Wijmeersch
- University MS Center (UMSC), Hasselt-Pelt, Hasselt, Belgium; Department of Immunology and Infection, Biomedical Research Institute, Hasselt University, Hasselt, Belgium; Noorderhart, Rehabilitation and MS Center, Pelt, Belgium
| | - S J Tavernier
- Department of Internal Medicine and Pediatrics, Ghent University, Ghent, Belgium; Unit of Molecular Signal Transduction in Inflammation, VIB-UGent Center for Inflammation Research (IRC), Ghent, Belgium
| | - M Kleinewietfeld
- University MS Center (UMSC), Hasselt-Pelt, Hasselt, Belgium; Department of Immunology and Infection, Biomedical Research Institute, Hasselt University, Hasselt, Belgium; VIB Laboratory of Translational Immunomodulation, Center for Inflammation Research (IRC), Diepenbeek, Belgium
| | - B Broux
- University MS Center (UMSC), Hasselt-Pelt, Hasselt, Belgium; Department of Immunology and Infection, Biomedical Research Institute, Hasselt University, Hasselt, Belgium
| | - J Fraussen
- University MS Center (UMSC), Hasselt-Pelt, Hasselt, Belgium; Department of Immunology and Infection, Biomedical Research Institute, Hasselt University, Hasselt, Belgium
| | - V Somers
- University MS Center (UMSC), Hasselt-Pelt, Hasselt, Belgium; Department of Immunology and Infection, Biomedical Research Institute, Hasselt University, Hasselt, Belgium.
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Kochetkov A, Aït Abderrahim H, Baeten P, Krása A, Messaoudi N, Vittiglio G, Wagemans J. Integral experiments in the VENUS-F reactor. ANN NUCL ENERGY 2021. [DOI: 10.1016/j.anucene.2021.108230] [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: 10/21/2022]
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Soule R, Assal W, Chaussonnet P, Destouches C, Domergue C, Jammes C, Laurens JM, Lebrat JF, Mellier F, Perret G, Rimpault G, Servière H, Imel G, Thomas GM, Villamarin D, Gonzalez-Romero E, Plaschy M, Chawla R, Klooster JL, Rugama Y, Billebaud A, Brissot R, Heuer D, Kerveno M, Brun CL, Liatard E, Loiseaux JM, Méplan O, Merle E, Perdu F, Vollaire J, Baeten P. Neutronic Studies in Support of Accelerator-Driven Systems: The MUSE Experiments in the MASURCA Facility. NUCL SCI ENG 2017. [DOI: 10.13182/nse01-13c] [Citation(s) in RCA: 104] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- R. Soule
- Commissariat à l’Energie Atomique, Centre de Cadarache F-13108 Saint Paul lez Durance, France
| | - W. Assal
- Commissariat à l’Energie Atomique, Centre de Cadarache F-13108 Saint Paul lez Durance, France
| | - P. Chaussonnet
- Commissariat à l’Energie Atomique, Centre de Cadarache F-13108 Saint Paul lez Durance, France
| | - C. Destouches
- Commissariat à l’Energie Atomique, Centre de Cadarache F-13108 Saint Paul lez Durance, France
| | - C. Domergue
- Commissariat à l’Energie Atomique, Centre de Cadarache F-13108 Saint Paul lez Durance, France
| | - C. Jammes
- Commissariat à l’Energie Atomique, Centre de Cadarache F-13108 Saint Paul lez Durance, France
| | - J.-M. Laurens
- Commissariat à l’Energie Atomique, Centre de Cadarache F-13108 Saint Paul lez Durance, France
| | - J.-F. Lebrat
- Commissariat à l’Energie Atomique, Centre de Cadarache F-13108 Saint Paul lez Durance, France
| | - F. Mellier
- Commissariat à l’Energie Atomique, Centre de Cadarache F-13108 Saint Paul lez Durance, France
| | - G. Perret
- Commissariat à l’Energie Atomique, Centre de Cadarache F-13108 Saint Paul lez Durance, France
| | - G. Rimpault
- Commissariat à l’Energie Atomique, Centre de Cadarache F-13108 Saint Paul lez Durance, France
| | - H. Servière
- Commissariat à l’Energie Atomique, Centre de Cadarache F-13108 Saint Paul lez Durance, France
| | - G. Imel
- Argonne National Laboratory-West, P.O. Box 2528, Idaho Falls, Idaho 83403
| | - G. M. Thomas
- BNFL, Springfields Works, Preston, Lancashire, England
| | | | | | - M. Plaschy
- Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland
| | - R. Chawla
- Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland
| | | | - Y. Rugama
- IRI, DUT, Mekelweg 15, NL-2629 JB Delft, Netherlands
| | - A. Billebaud
- LPSC (ISN), CNRS-IN2P3/UJF 53 av. des Martyrs, F-38026 Grenoble Cedex, France
| | - R. Brissot
- LPSC (ISN), CNRS-IN2P3/UJF 53 av. des Martyrs, F-38026 Grenoble Cedex, France
| | - D. Heuer
- LPSC (ISN), CNRS-IN2P3/UJF 53 av. des Martyrs, F-38026 Grenoble Cedex, France
| | - M. Kerveno
- LPSC (ISN), CNRS-IN2P3/UJF 53 av. des Martyrs, F-38026 Grenoble Cedex, France
| | - C. Le Brun
- LPSC (ISN), CNRS-IN2P3/UJF 53 av. des Martyrs, F-38026 Grenoble Cedex, France
| | - E. Liatard
- LPSC (ISN), CNRS-IN2P3/UJF 53 av. des Martyrs, F-38026 Grenoble Cedex, France
| | - J.-M. Loiseaux
- LPSC (ISN), CNRS-IN2P3/UJF 53 av. des Martyrs, F-38026 Grenoble Cedex, France
| | - O. Méplan
- LPSC (ISN), CNRS-IN2P3/UJF 53 av. des Martyrs, F-38026 Grenoble Cedex, France
| | - E. Merle
- LPSC (ISN), CNRS-IN2P3/UJF 53 av. des Martyrs, F-38026 Grenoble Cedex, France
| | - F. Perdu
- LPSC (ISN), CNRS-IN2P3/UJF 53 av. des Martyrs, F-38026 Grenoble Cedex, France
| | - J. Vollaire
- LPSC (ISN), CNRS-IN2P3/UJF 53 av. des Martyrs, F-38026 Grenoble Cedex, France
| | - P. Baeten
- SCK-CEN, Boeretang 200, 2400 Mol, Belgium
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Uyttenhove W, Lathouwers D, Kloosterman JL, van der Hagen T, Van den Eynde G, Baeten P. Methodology for modal analysis at pulsed neutron source experiments in accelerator-driven systems. ANN NUCL ENERGY 2014. [DOI: 10.1016/j.anucene.2014.05.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Di Maria S, Ottolini M, Sarotto M, Martin-Fuertes F, Vazquez M, Mbala E, Teles P, Vaz P, Castelliti D, Reale M, Mansani L, Baeten P. Neutronic Assessment and Criticality Analysis of the In-Vessel Fuel Storage Facilities in the CDT Project. Fusion Science and Technology 2012. [DOI: 10.13182/fst12-a13436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- S. Di Maria
- Instituto Tecnòlogico e Nuclear, EN 10, 2686-953 Sacavém, Portugal
| | - M. Ottolini
- Ansaldo Nucleare S.p.A., c.so Perrone 25, 16161 Genova, Italy
| | - M. Sarotto
- ENEA, via Martiri di Monte Sole 4, 40129 Bologna, Italy
| | | | - M. Vazquez
- CIEMAT, Avda Complutense 22, 28040 Madrid, Spain
| | | | - P. Teles
- Instituto Tecnòlogico e Nuclear, EN 10, 2686-953 Sacavém, Portugal
| | - P. Vaz
- Instituto Tecnòlogico e Nuclear, EN 10, 2686-953 Sacavém, Portugal
| | | | - M. Reale
- Ansaldo Nucleare S.p.A., c.so Perrone 25, 16161 Genova, Italy
| | - L. Mansani
- Ansaldo Nucleare S.p.A., c.so Perrone 25, 16161 Genova, Italy
| | - P. Baeten
- SCK-CEN, Boeretang 200, Mol B-2400, Belgium
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Uyttenhove W, Baeten P, Van den Eynde G, Kochetkov A, Lathouwers D, Carta M. The neutronic design of a critical lead reflected zero-power reference core for on-line subcriticality measurements in Accelerator Driven Systems. ANN NUCL ENERGY 2011. [DOI: 10.1016/j.anucene.2011.03.012] [Citation(s) in RCA: 29] [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: 11/27/2022]
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Affiliation(s)
- A. Serikov
- Association FZK-EURATOM Forschungszentrum Karlsruhe, P.O. Box 3640, 76021 Karlsruhe, Germany
| | - U. Fischer
- Association FZK-EURATOM Forschungszentrum Karlsruhe, P.O. Box 3640, 76021 Karlsruhe, Germany
| | - L. Mercatali
- Association FZK-EURATOM Forschungszentrum Karlsruhe, P.O. Box 3640, 76021 Karlsruhe, Germany
| | - P. Baeten
- SCK•CEN, Boeretang 200, B-2400 Mol, Belgium
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Baeten P. Heuristic derivation of the Rossi-alpha formula for a pulsed neutron source. ANN NUCL ENERGY 2004. [DOI: 10.1016/s0306-4549(03)00162-2] [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: 10/27/2022]
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Baeten P, Paepen J, van der Meer K, Abderrahim H. Absolute measurement of βeff and l on weapon-grade MOX fuel at the VENUS critical facility by means of the RAPJA technique. ANN NUCL ENERGY 2001. [DOI: 10.1016/s0306-4549(00)00063-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Baeten P, Bruggeman M, Paepen J, Carchon R. Quantification of transuranic elements by time interval correlation spectroscopy of the detected neutrons. Appl Radiat Isot 2000; 52:399-402. [PMID: 10724381 DOI: 10.1016/s0969-8043(99)00185-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The non-destructive quantification of transuranic elements in nuclear waste management or in safeguards verifications is commonly performed by passive neutron assay techniques. To minimise the number of unknown sample-dependent parameters, Neutron Multiplicity Counting (NMC) is applied. We developed a new NMC-technique, called Time Interval Correlation Spectroscopy (TICS), which is based on the measurement of Rossi-alpha time interval distributions. Compared to other NMC-techniques, TICS offers several advantages.
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Affiliation(s)
- P Baeten
- Nuclear Research Centre, Mol, Belgium.
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