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March 2023; 10 (2) Research ArticleOpen Access

Ocrelizumab Treatment Modulates B-Cell Regulating Factors in Multiple Sclerosis

Samantha Ho, Eva Oswald, Hoi Kiu Wong, Atay Vural, Vuslat Yilmaz, Erdem Tüzün, Recai Türkoğlu, Tobias Straub, Ingrid Meinl, Franziska Thaler, Tania Kümpfel, Edgar Meinl, Simone Mader
First published January 26, 2023, DOI: https://doi.org/10.1212/NXI.0000000000200083
Samantha Ho
From the Institute of Clinical Neuroimmunology (S.H., E.O., H.K.W., A.V., I.M., F.T., T.K., E.M., S.M.), Biomedical Center and University Hospitals, Ludwig-Maximilians-Universität München; Graduate School of Systemic Neurosciences (S.H.), Ludwig-Maximilians-Universität München, Germany; Department of Neurology (A.V.), Koc University School of Medicine; Department of Neuroscience (V.Y., E.T.), Aziz Sancar Institute of Experimental Medicine, Istanbul University; Department of Neurology (R.T.), Haydarpasa Numune Education and Research Hospital, Istanbul, Türkiye; Core Facility Bioinformatics (T.S.), Biomedical Center, Ludwig-Maximilians-Universität München, Germany; Munich Cluster for Systems Neurology (SyNergy) (F.T.), Germany.
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Eva Oswald
From the Institute of Clinical Neuroimmunology (S.H., E.O., H.K.W., A.V., I.M., F.T., T.K., E.M., S.M.), Biomedical Center and University Hospitals, Ludwig-Maximilians-Universität München; Graduate School of Systemic Neurosciences (S.H.), Ludwig-Maximilians-Universität München, Germany; Department of Neurology (A.V.), Koc University School of Medicine; Department of Neuroscience (V.Y., E.T.), Aziz Sancar Institute of Experimental Medicine, Istanbul University; Department of Neurology (R.T.), Haydarpasa Numune Education and Research Hospital, Istanbul, Türkiye; Core Facility Bioinformatics (T.S.), Biomedical Center, Ludwig-Maximilians-Universität München, Germany; Munich Cluster for Systems Neurology (SyNergy) (F.T.), Germany.
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Hoi Kiu Wong
From the Institute of Clinical Neuroimmunology (S.H., E.O., H.K.W., A.V., I.M., F.T., T.K., E.M., S.M.), Biomedical Center and University Hospitals, Ludwig-Maximilians-Universität München; Graduate School of Systemic Neurosciences (S.H.), Ludwig-Maximilians-Universität München, Germany; Department of Neurology (A.V.), Koc University School of Medicine; Department of Neuroscience (V.Y., E.T.), Aziz Sancar Institute of Experimental Medicine, Istanbul University; Department of Neurology (R.T.), Haydarpasa Numune Education and Research Hospital, Istanbul, Türkiye; Core Facility Bioinformatics (T.S.), Biomedical Center, Ludwig-Maximilians-Universität München, Germany; Munich Cluster for Systems Neurology (SyNergy) (F.T.), Germany.
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Atay Vural
From the Institute of Clinical Neuroimmunology (S.H., E.O., H.K.W., A.V., I.M., F.T., T.K., E.M., S.M.), Biomedical Center and University Hospitals, Ludwig-Maximilians-Universität München; Graduate School of Systemic Neurosciences (S.H.), Ludwig-Maximilians-Universität München, Germany; Department of Neurology (A.V.), Koc University School of Medicine; Department of Neuroscience (V.Y., E.T.), Aziz Sancar Institute of Experimental Medicine, Istanbul University; Department of Neurology (R.T.), Haydarpasa Numune Education and Research Hospital, Istanbul, Türkiye; Core Facility Bioinformatics (T.S.), Biomedical Center, Ludwig-Maximilians-Universität München, Germany; Munich Cluster for Systems Neurology (SyNergy) (F.T.), Germany.
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Vuslat Yilmaz
From the Institute of Clinical Neuroimmunology (S.H., E.O., H.K.W., A.V., I.M., F.T., T.K., E.M., S.M.), Biomedical Center and University Hospitals, Ludwig-Maximilians-Universität München; Graduate School of Systemic Neurosciences (S.H.), Ludwig-Maximilians-Universität München, Germany; Department of Neurology (A.V.), Koc University School of Medicine; Department of Neuroscience (V.Y., E.T.), Aziz Sancar Institute of Experimental Medicine, Istanbul University; Department of Neurology (R.T.), Haydarpasa Numune Education and Research Hospital, Istanbul, Türkiye; Core Facility Bioinformatics (T.S.), Biomedical Center, Ludwig-Maximilians-Universität München, Germany; Munich Cluster for Systems Neurology (SyNergy) (F.T.), Germany.
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Erdem Tüzün
From the Institute of Clinical Neuroimmunology (S.H., E.O., H.K.W., A.V., I.M., F.T., T.K., E.M., S.M.), Biomedical Center and University Hospitals, Ludwig-Maximilians-Universität München; Graduate School of Systemic Neurosciences (S.H.), Ludwig-Maximilians-Universität München, Germany; Department of Neurology (A.V.), Koc University School of Medicine; Department of Neuroscience (V.Y., E.T.), Aziz Sancar Institute of Experimental Medicine, Istanbul University; Department of Neurology (R.T.), Haydarpasa Numune Education and Research Hospital, Istanbul, Türkiye; Core Facility Bioinformatics (T.S.), Biomedical Center, Ludwig-Maximilians-Universität München, Germany; Munich Cluster for Systems Neurology (SyNergy) (F.T.), Germany.
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Recai Türkoğlu
From the Institute of Clinical Neuroimmunology (S.H., E.O., H.K.W., A.V., I.M., F.T., T.K., E.M., S.M.), Biomedical Center and University Hospitals, Ludwig-Maximilians-Universität München; Graduate School of Systemic Neurosciences (S.H.), Ludwig-Maximilians-Universität München, Germany; Department of Neurology (A.V.), Koc University School of Medicine; Department of Neuroscience (V.Y., E.T.), Aziz Sancar Institute of Experimental Medicine, Istanbul University; Department of Neurology (R.T.), Haydarpasa Numune Education and Research Hospital, Istanbul, Türkiye; Core Facility Bioinformatics (T.S.), Biomedical Center, Ludwig-Maximilians-Universität München, Germany; Munich Cluster for Systems Neurology (SyNergy) (F.T.), Germany.
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Tobias Straub
From the Institute of Clinical Neuroimmunology (S.H., E.O., H.K.W., A.V., I.M., F.T., T.K., E.M., S.M.), Biomedical Center and University Hospitals, Ludwig-Maximilians-Universität München; Graduate School of Systemic Neurosciences (S.H.), Ludwig-Maximilians-Universität München, Germany; Department of Neurology (A.V.), Koc University School of Medicine; Department of Neuroscience (V.Y., E.T.), Aziz Sancar Institute of Experimental Medicine, Istanbul University; Department of Neurology (R.T.), Haydarpasa Numune Education and Research Hospital, Istanbul, Türkiye; Core Facility Bioinformatics (T.S.), Biomedical Center, Ludwig-Maximilians-Universität München, Germany; Munich Cluster for Systems Neurology (SyNergy) (F.T.), Germany.
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Ingrid Meinl
From the Institute of Clinical Neuroimmunology (S.H., E.O., H.K.W., A.V., I.M., F.T., T.K., E.M., S.M.), Biomedical Center and University Hospitals, Ludwig-Maximilians-Universität München; Graduate School of Systemic Neurosciences (S.H.), Ludwig-Maximilians-Universität München, Germany; Department of Neurology (A.V.), Koc University School of Medicine; Department of Neuroscience (V.Y., E.T.), Aziz Sancar Institute of Experimental Medicine, Istanbul University; Department of Neurology (R.T.), Haydarpasa Numune Education and Research Hospital, Istanbul, Türkiye; Core Facility Bioinformatics (T.S.), Biomedical Center, Ludwig-Maximilians-Universität München, Germany; Munich Cluster for Systems Neurology (SyNergy) (F.T.), Germany.
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Franziska Thaler
From the Institute of Clinical Neuroimmunology (S.H., E.O., H.K.W., A.V., I.M., F.T., T.K., E.M., S.M.), Biomedical Center and University Hospitals, Ludwig-Maximilians-Universität München; Graduate School of Systemic Neurosciences (S.H.), Ludwig-Maximilians-Universität München, Germany; Department of Neurology (A.V.), Koc University School of Medicine; Department of Neuroscience (V.Y., E.T.), Aziz Sancar Institute of Experimental Medicine, Istanbul University; Department of Neurology (R.T.), Haydarpasa Numune Education and Research Hospital, Istanbul, Türkiye; Core Facility Bioinformatics (T.S.), Biomedical Center, Ludwig-Maximilians-Universität München, Germany; Munich Cluster for Systems Neurology (SyNergy) (F.T.), Germany.
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Tania Kümpfel
From the Institute of Clinical Neuroimmunology (S.H., E.O., H.K.W., A.V., I.M., F.T., T.K., E.M., S.M.), Biomedical Center and University Hospitals, Ludwig-Maximilians-Universität München; Graduate School of Systemic Neurosciences (S.H.), Ludwig-Maximilians-Universität München, Germany; Department of Neurology (A.V.), Koc University School of Medicine; Department of Neuroscience (V.Y., E.T.), Aziz Sancar Institute of Experimental Medicine, Istanbul University; Department of Neurology (R.T.), Haydarpasa Numune Education and Research Hospital, Istanbul, Türkiye; Core Facility Bioinformatics (T.S.), Biomedical Center, Ludwig-Maximilians-Universität München, Germany; Munich Cluster for Systems Neurology (SyNergy) (F.T.), Germany.
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Edgar Meinl
From the Institute of Clinical Neuroimmunology (S.H., E.O., H.K.W., A.V., I.M., F.T., T.K., E.M., S.M.), Biomedical Center and University Hospitals, Ludwig-Maximilians-Universität München; Graduate School of Systemic Neurosciences (S.H.), Ludwig-Maximilians-Universität München, Germany; Department of Neurology (A.V.), Koc University School of Medicine; Department of Neuroscience (V.Y., E.T.), Aziz Sancar Institute of Experimental Medicine, Istanbul University; Department of Neurology (R.T.), Haydarpasa Numune Education and Research Hospital, Istanbul, Türkiye; Core Facility Bioinformatics (T.S.), Biomedical Center, Ludwig-Maximilians-Universität München, Germany; Munich Cluster for Systems Neurology (SyNergy) (F.T.), Germany.
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Simone Mader
From the Institute of Clinical Neuroimmunology (S.H., E.O., H.K.W., A.V., I.M., F.T., T.K., E.M., S.M.), Biomedical Center and University Hospitals, Ludwig-Maximilians-Universität München; Graduate School of Systemic Neurosciences (S.H.), Ludwig-Maximilians-Universität München, Germany; Department of Neurology (A.V.), Koc University School of Medicine; Department of Neuroscience (V.Y., E.T.), Aziz Sancar Institute of Experimental Medicine, Istanbul University; Department of Neurology (R.T.), Haydarpasa Numune Education and Research Hospital, Istanbul, Türkiye; Core Facility Bioinformatics (T.S.), Biomedical Center, Ludwig-Maximilians-Universität München, Germany; Munich Cluster for Systems Neurology (SyNergy) (F.T.), Germany.
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Citation
Ocrelizumab Treatment Modulates B-Cell Regulating Factors in Multiple Sclerosis
Samantha Ho, Eva Oswald, Hoi Kiu Wong, Atay Vural, Vuslat Yilmaz, Erdem Tüzün, Recai Türkoğlu, Tobias Straub, Ingrid Meinl, Franziska Thaler, Tania Kümpfel, Edgar Meinl, Simone Mader
Neurol Neuroimmunol Neuroinflamm Mar 2023, 10 (2) e200083; DOI: 10.1212/NXI.0000000000200083

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Abstract

Background and Objectives Antibodies to CD20 efficiently reduce new relapses in multiple sclerosis (MS), and ocrelizumab has been shown to be effective also in primary progressive MS. Although anti-CD20 treatments efficiently deplete B cells in blood, some B cells and CD20− plasma cells persist in lymphatic organs and the inflamed CNS; their survival is regulated by the B cell–activating factor (BAFF)/A proliferation-inducing ligand (APRIL) system. The administration of a soluble receptor for BAFF and APRIL, atacicept, unexpectedly worsened MS. Here, we explored the long-term effects of ocrelizumab on immune cell subsets as well as on cytokines and endogenous soluble receptors comprising the BAFF-APRIL system.

Methods We analyzed immune cell subsets and B cell–regulating factors longitudinally for up to 2.5 years in patients with MS treated with ocrelizumab. In a second cohort, we determined B-cell regulatory factors in the CSF before and after ocrelizumab. We quantified the cytokines BAFF and APRIL along with their endogenous soluble receptors soluble B-cell maturation antigen (sBCMA) and soluble transmembrane activator and calcium-modulator and cyclophilin ligand (CAML) interactor (sTACI) using enzyme-linked immunosorbent assays (ELISAs). In addition, we established an in-house ELISA to measure sTACI-BAFF complexes.

Results Ocrelizumab treatment of people with MS persistently depleted B cells and CD20+ T cells. This treatment enhanced BAFF and reduced the free endogenous soluble receptor and decoy sTACI in both serum and CSF. Levels of sTACI negatively correlated with BAFF levels. Reduction of sTACI was associated with formation of sTACI-BAFF complexes.

Discussion We describe a novel effect of anti-CD20 therapy on the BAFF-APRIL system, namely reduction of sTACI. Because sTACI is a decoy for APRIL, its reduction may enhance local APRIL activity, thereby promoting regulatory IgA+ plasma cells and astrocytic interleukin (IL)-10 production. Thus, reducing sTACI might contribute to the beneficial effect of anti-CD20 as exogenous sTACI (atacicept) worsened MS.

Classification of Evidence This study provides Class IV evidence that endogenous sTACI in blood and CSF is decreased after ocrelizumab treatment.

Glossary

APRIL=
A proliferation-inducing ligand;
BAFF=
B cell–activating factor;
BAFF-R=
BAFF receptor;
BCMA=
B-cell maturation antigen;
BL=
baseline;
CAML=
calcium-modulator and cyclophilin ligand;
EAE=
experimental autoimmune encephalomyelitis;
ELISA=
enzyme-linked immunosorbent assay;
IL=
interleukin;
MS=
multiple sclerosis;
sTACI=
soluble transmembrane activator and CAML interactor;
sBCMA=
soluble B-cell maturation antigen;
TACI=
transmembrane activator and CAML interactor;
TP1=
time point 1

Footnotes

  • Go to Neurology.org/NN for full disclosures. Funding information is provided at the end of the article.

  • The Article Processing Charge was funded by the authors.

  • Submitted and externally peer reviewed. The handling editor was Deputy Editor Scott S. Zamvil, MD, PhD, FAAN.

  • Class of Evidence: NPub.org/coe

  • Received June 10, 2022.
  • Accepted in final form November 22, 2022.
  • Copyright © 2023 The Author(s). Published by Wolters Kluwer Health, Inc. on behalf of the American Academy of Neurology.

This is an open access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND), which permits downloading and sharing the work provided it is properly cited. The work cannot be changed in any way or used commercially without permission from the journal.

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