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September 17, 2019; 93 (12) Clinical/Scientific Notes

Prospective validation of the PML risk biomarker l-selectin and influence of natalizumab extended intervals

View ORCID ProfileNicholas Schwab, View ORCID ProfileTilman Schneider-Hohendorf, Béatrice Pignolet, Florence Bucciarelli, Lise Scandella, Jonathan Ciron, Damien Biotti, Christine Lebrun-Frenay, Guillaume Mathey, Pierre Clavelou, Jean Pelletier, Patrick Ostkamp, Ingrid Meinl, Susanne Windhagen, Luisa Klotz, Catharina C. Gross, Sven G. Meuth, View ORCID ProfileFlorian Deisenhammer, David Brassat, Heinz Wiendl, on behalf of the Best-MS Study Group
First published August 22, 2019, DOI: https://doi.org/10.1212/WNL.0000000000008135
Nicholas Schwab
From the Department of Neurology with Institute of Translational Neurology (N.S., T.S.-H., P.O., L.K., C.C.G., S.G.M., H.W.), University of Münster, Münster, Germany; CRC-SEP—Neurosciences Department (B.P., F.B., L.S., J.C., D. Biotti, D. Brassat), CHU Toulouse, Toulouse, France; CPTP—INSERM U1043—CNRS U5282—Université Toulouse III (B.P., F.B., L.S., D. Brassat), Toulouse, France; APHM (C.L.-F.), Hôpital de la Timone, Pôle de Neurosciences Cliniques, Marseille, France; CHU of Nice (G.M.), Nice, France; CHU Montpied, Neurology, Clermont-Ferrand, France (P.C.); APHM (J.P.), Hôpital de la Timone, Pôle de Neurosciences Cliniques, Service de Neurologie, CRCSEP Marseille, France; Institute of Clinical Neuroimmunology (I.M.), Ludwig-Maximilians University, Munich, Germany; Department of Neurology (S.W.), Clinics Osnabrück, Osnabrück, Germany; and Department of Neurology (F.G.), Innsbruck Medical University, Innsbruck, Austria.
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  • ORCID record for Nicholas Schwab
Tilman Schneider-Hohendorf
From the Department of Neurology with Institute of Translational Neurology (N.S., T.S.-H., P.O., L.K., C.C.G., S.G.M., H.W.), University of Münster, Münster, Germany; CRC-SEP—Neurosciences Department (B.P., F.B., L.S., J.C., D. Biotti, D. Brassat), CHU Toulouse, Toulouse, France; CPTP—INSERM U1043—CNRS U5282—Université Toulouse III (B.P., F.B., L.S., D. Brassat), Toulouse, France; APHM (C.L.-F.), Hôpital de la Timone, Pôle de Neurosciences Cliniques, Marseille, France; CHU of Nice (G.M.), Nice, France; CHU Montpied, Neurology, Clermont-Ferrand, France (P.C.); APHM (J.P.), Hôpital de la Timone, Pôle de Neurosciences Cliniques, Service de Neurologie, CRCSEP Marseille, France; Institute of Clinical Neuroimmunology (I.M.), Ludwig-Maximilians University, Munich, Germany; Department of Neurology (S.W.), Clinics Osnabrück, Osnabrück, Germany; and Department of Neurology (F.G.), Innsbruck Medical University, Innsbruck, Austria.
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  • ORCID record for Tilman Schneider-Hohendorf
Béatrice Pignolet
From the Department of Neurology with Institute of Translational Neurology (N.S., T.S.-H., P.O., L.K., C.C.G., S.G.M., H.W.), University of Münster, Münster, Germany; CRC-SEP—Neurosciences Department (B.P., F.B., L.S., J.C., D. Biotti, D. Brassat), CHU Toulouse, Toulouse, France; CPTP—INSERM U1043—CNRS U5282—Université Toulouse III (B.P., F.B., L.S., D. Brassat), Toulouse, France; APHM (C.L.-F.), Hôpital de la Timone, Pôle de Neurosciences Cliniques, Marseille, France; CHU of Nice (G.M.), Nice, France; CHU Montpied, Neurology, Clermont-Ferrand, France (P.C.); APHM (J.P.), Hôpital de la Timone, Pôle de Neurosciences Cliniques, Service de Neurologie, CRCSEP Marseille, France; Institute of Clinical Neuroimmunology (I.M.), Ludwig-Maximilians University, Munich, Germany; Department of Neurology (S.W.), Clinics Osnabrück, Osnabrück, Germany; and Department of Neurology (F.G.), Innsbruck Medical University, Innsbruck, Austria.
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Florence Bucciarelli
From the Department of Neurology with Institute of Translational Neurology (N.S., T.S.-H., P.O., L.K., C.C.G., S.G.M., H.W.), University of Münster, Münster, Germany; CRC-SEP—Neurosciences Department (B.P., F.B., L.S., J.C., D. Biotti, D. Brassat), CHU Toulouse, Toulouse, France; CPTP—INSERM U1043—CNRS U5282—Université Toulouse III (B.P., F.B., L.S., D. Brassat), Toulouse, France; APHM (C.L.-F.), Hôpital de la Timone, Pôle de Neurosciences Cliniques, Marseille, France; CHU of Nice (G.M.), Nice, France; CHU Montpied, Neurology, Clermont-Ferrand, France (P.C.); APHM (J.P.), Hôpital de la Timone, Pôle de Neurosciences Cliniques, Service de Neurologie, CRCSEP Marseille, France; Institute of Clinical Neuroimmunology (I.M.), Ludwig-Maximilians University, Munich, Germany; Department of Neurology (S.W.), Clinics Osnabrück, Osnabrück, Germany; and Department of Neurology (F.G.), Innsbruck Medical University, Innsbruck, Austria.
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Lise Scandella
From the Department of Neurology with Institute of Translational Neurology (N.S., T.S.-H., P.O., L.K., C.C.G., S.G.M., H.W.), University of Münster, Münster, Germany; CRC-SEP—Neurosciences Department (B.P., F.B., L.S., J.C., D. Biotti, D. Brassat), CHU Toulouse, Toulouse, France; CPTP—INSERM U1043—CNRS U5282—Université Toulouse III (B.P., F.B., L.S., D. Brassat), Toulouse, France; APHM (C.L.-F.), Hôpital de la Timone, Pôle de Neurosciences Cliniques, Marseille, France; CHU of Nice (G.M.), Nice, France; CHU Montpied, Neurology, Clermont-Ferrand, France (P.C.); APHM (J.P.), Hôpital de la Timone, Pôle de Neurosciences Cliniques, Service de Neurologie, CRCSEP Marseille, France; Institute of Clinical Neuroimmunology (I.M.), Ludwig-Maximilians University, Munich, Germany; Department of Neurology (S.W.), Clinics Osnabrück, Osnabrück, Germany; and Department of Neurology (F.G.), Innsbruck Medical University, Innsbruck, Austria.
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Jonathan Ciron
From the Department of Neurology with Institute of Translational Neurology (N.S., T.S.-H., P.O., L.K., C.C.G., S.G.M., H.W.), University of Münster, Münster, Germany; CRC-SEP—Neurosciences Department (B.P., F.B., L.S., J.C., D. Biotti, D. Brassat), CHU Toulouse, Toulouse, France; CPTP—INSERM U1043—CNRS U5282—Université Toulouse III (B.P., F.B., L.S., D. Brassat), Toulouse, France; APHM (C.L.-F.), Hôpital de la Timone, Pôle de Neurosciences Cliniques, Marseille, France; CHU of Nice (G.M.), Nice, France; CHU Montpied, Neurology, Clermont-Ferrand, France (P.C.); APHM (J.P.), Hôpital de la Timone, Pôle de Neurosciences Cliniques, Service de Neurologie, CRCSEP Marseille, France; Institute of Clinical Neuroimmunology (I.M.), Ludwig-Maximilians University, Munich, Germany; Department of Neurology (S.W.), Clinics Osnabrück, Osnabrück, Germany; and Department of Neurology (F.G.), Innsbruck Medical University, Innsbruck, Austria.
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Damien Biotti
From the Department of Neurology with Institute of Translational Neurology (N.S., T.S.-H., P.O., L.K., C.C.G., S.G.M., H.W.), University of Münster, Münster, Germany; CRC-SEP—Neurosciences Department (B.P., F.B., L.S., J.C., D. Biotti, D. Brassat), CHU Toulouse, Toulouse, France; CPTP—INSERM U1043—CNRS U5282—Université Toulouse III (B.P., F.B., L.S., D. Brassat), Toulouse, France; APHM (C.L.-F.), Hôpital de la Timone, Pôle de Neurosciences Cliniques, Marseille, France; CHU of Nice (G.M.), Nice, France; CHU Montpied, Neurology, Clermont-Ferrand, France (P.C.); APHM (J.P.), Hôpital de la Timone, Pôle de Neurosciences Cliniques, Service de Neurologie, CRCSEP Marseille, France; Institute of Clinical Neuroimmunology (I.M.), Ludwig-Maximilians University, Munich, Germany; Department of Neurology (S.W.), Clinics Osnabrück, Osnabrück, Germany; and Department of Neurology (F.G.), Innsbruck Medical University, Innsbruck, Austria.
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Christine Lebrun-Frenay
From the Department of Neurology with Institute of Translational Neurology (N.S., T.S.-H., P.O., L.K., C.C.G., S.G.M., H.W.), University of Münster, Münster, Germany; CRC-SEP—Neurosciences Department (B.P., F.B., L.S., J.C., D. Biotti, D. Brassat), CHU Toulouse, Toulouse, France; CPTP—INSERM U1043—CNRS U5282—Université Toulouse III (B.P., F.B., L.S., D. Brassat), Toulouse, France; APHM (C.L.-F.), Hôpital de la Timone, Pôle de Neurosciences Cliniques, Marseille, France; CHU of Nice (G.M.), Nice, France; CHU Montpied, Neurology, Clermont-Ferrand, France (P.C.); APHM (J.P.), Hôpital de la Timone, Pôle de Neurosciences Cliniques, Service de Neurologie, CRCSEP Marseille, France; Institute of Clinical Neuroimmunology (I.M.), Ludwig-Maximilians University, Munich, Germany; Department of Neurology (S.W.), Clinics Osnabrück, Osnabrück, Germany; and Department of Neurology (F.G.), Innsbruck Medical University, Innsbruck, Austria.
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Guillaume Mathey
From the Department of Neurology with Institute of Translational Neurology (N.S., T.S.-H., P.O., L.K., C.C.G., S.G.M., H.W.), University of Münster, Münster, Germany; CRC-SEP—Neurosciences Department (B.P., F.B., L.S., J.C., D. Biotti, D. Brassat), CHU Toulouse, Toulouse, France; CPTP—INSERM U1043—CNRS U5282—Université Toulouse III (B.P., F.B., L.S., D. Brassat), Toulouse, France; APHM (C.L.-F.), Hôpital de la Timone, Pôle de Neurosciences Cliniques, Marseille, France; CHU of Nice (G.M.), Nice, France; CHU Montpied, Neurology, Clermont-Ferrand, France (P.C.); APHM (J.P.), Hôpital de la Timone, Pôle de Neurosciences Cliniques, Service de Neurologie, CRCSEP Marseille, France; Institute of Clinical Neuroimmunology (I.M.), Ludwig-Maximilians University, Munich, Germany; Department of Neurology (S.W.), Clinics Osnabrück, Osnabrück, Germany; and Department of Neurology (F.G.), Innsbruck Medical University, Innsbruck, Austria.
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Pierre Clavelou
From the Department of Neurology with Institute of Translational Neurology (N.S., T.S.-H., P.O., L.K., C.C.G., S.G.M., H.W.), University of Münster, Münster, Germany; CRC-SEP—Neurosciences Department (B.P., F.B., L.S., J.C., D. Biotti, D. Brassat), CHU Toulouse, Toulouse, France; CPTP—INSERM U1043—CNRS U5282—Université Toulouse III (B.P., F.B., L.S., D. Brassat), Toulouse, France; APHM (C.L.-F.), Hôpital de la Timone, Pôle de Neurosciences Cliniques, Marseille, France; CHU of Nice (G.M.), Nice, France; CHU Montpied, Neurology, Clermont-Ferrand, France (P.C.); APHM (J.P.), Hôpital de la Timone, Pôle de Neurosciences Cliniques, Service de Neurologie, CRCSEP Marseille, France; Institute of Clinical Neuroimmunology (I.M.), Ludwig-Maximilians University, Munich, Germany; Department of Neurology (S.W.), Clinics Osnabrück, Osnabrück, Germany; and Department of Neurology (F.G.), Innsbruck Medical University, Innsbruck, Austria.
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Jean Pelletier
From the Department of Neurology with Institute of Translational Neurology (N.S., T.S.-H., P.O., L.K., C.C.G., S.G.M., H.W.), University of Münster, Münster, Germany; CRC-SEP—Neurosciences Department (B.P., F.B., L.S., J.C., D. Biotti, D. Brassat), CHU Toulouse, Toulouse, France; CPTP—INSERM U1043—CNRS U5282—Université Toulouse III (B.P., F.B., L.S., D. Brassat), Toulouse, France; APHM (C.L.-F.), Hôpital de la Timone, Pôle de Neurosciences Cliniques, Marseille, France; CHU of Nice (G.M.), Nice, France; CHU Montpied, Neurology, Clermont-Ferrand, France (P.C.); APHM (J.P.), Hôpital de la Timone, Pôle de Neurosciences Cliniques, Service de Neurologie, CRCSEP Marseille, France; Institute of Clinical Neuroimmunology (I.M.), Ludwig-Maximilians University, Munich, Germany; Department of Neurology (S.W.), Clinics Osnabrück, Osnabrück, Germany; and Department of Neurology (F.G.), Innsbruck Medical University, Innsbruck, Austria.
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Patrick Ostkamp
From the Department of Neurology with Institute of Translational Neurology (N.S., T.S.-H., P.O., L.K., C.C.G., S.G.M., H.W.), University of Münster, Münster, Germany; CRC-SEP—Neurosciences Department (B.P., F.B., L.S., J.C., D. Biotti, D. Brassat), CHU Toulouse, Toulouse, France; CPTP—INSERM U1043—CNRS U5282—Université Toulouse III (B.P., F.B., L.S., D. Brassat), Toulouse, France; APHM (C.L.-F.), Hôpital de la Timone, Pôle de Neurosciences Cliniques, Marseille, France; CHU of Nice (G.M.), Nice, France; CHU Montpied, Neurology, Clermont-Ferrand, France (P.C.); APHM (J.P.), Hôpital de la Timone, Pôle de Neurosciences Cliniques, Service de Neurologie, CRCSEP Marseille, France; Institute of Clinical Neuroimmunology (I.M.), Ludwig-Maximilians University, Munich, Germany; Department of Neurology (S.W.), Clinics Osnabrück, Osnabrück, Germany; and Department of Neurology (F.G.), Innsbruck Medical University, Innsbruck, Austria.
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Ingrid Meinl
From the Department of Neurology with Institute of Translational Neurology (N.S., T.S.-H., P.O., L.K., C.C.G., S.G.M., H.W.), University of Münster, Münster, Germany; CRC-SEP—Neurosciences Department (B.P., F.B., L.S., J.C., D. Biotti, D. Brassat), CHU Toulouse, Toulouse, France; CPTP—INSERM U1043—CNRS U5282—Université Toulouse III (B.P., F.B., L.S., D. Brassat), Toulouse, France; APHM (C.L.-F.), Hôpital de la Timone, Pôle de Neurosciences Cliniques, Marseille, France; CHU of Nice (G.M.), Nice, France; CHU Montpied, Neurology, Clermont-Ferrand, France (P.C.); APHM (J.P.), Hôpital de la Timone, Pôle de Neurosciences Cliniques, Service de Neurologie, CRCSEP Marseille, France; Institute of Clinical Neuroimmunology (I.M.), Ludwig-Maximilians University, Munich, Germany; Department of Neurology (S.W.), Clinics Osnabrück, Osnabrück, Germany; and Department of Neurology (F.G.), Innsbruck Medical University, Innsbruck, Austria.
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Susanne Windhagen
From the Department of Neurology with Institute of Translational Neurology (N.S., T.S.-H., P.O., L.K., C.C.G., S.G.M., H.W.), University of Münster, Münster, Germany; CRC-SEP—Neurosciences Department (B.P., F.B., L.S., J.C., D. Biotti, D. Brassat), CHU Toulouse, Toulouse, France; CPTP—INSERM U1043—CNRS U5282—Université Toulouse III (B.P., F.B., L.S., D. Brassat), Toulouse, France; APHM (C.L.-F.), Hôpital de la Timone, Pôle de Neurosciences Cliniques, Marseille, France; CHU of Nice (G.M.), Nice, France; CHU Montpied, Neurology, Clermont-Ferrand, France (P.C.); APHM (J.P.), Hôpital de la Timone, Pôle de Neurosciences Cliniques, Service de Neurologie, CRCSEP Marseille, France; Institute of Clinical Neuroimmunology (I.M.), Ludwig-Maximilians University, Munich, Germany; Department of Neurology (S.W.), Clinics Osnabrück, Osnabrück, Germany; and Department of Neurology (F.G.), Innsbruck Medical University, Innsbruck, Austria.
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Luisa Klotz
From the Department of Neurology with Institute of Translational Neurology (N.S., T.S.-H., P.O., L.K., C.C.G., S.G.M., H.W.), University of Münster, Münster, Germany; CRC-SEP—Neurosciences Department (B.P., F.B., L.S., J.C., D. Biotti, D. Brassat), CHU Toulouse, Toulouse, France; CPTP—INSERM U1043—CNRS U5282—Université Toulouse III (B.P., F.B., L.S., D. Brassat), Toulouse, France; APHM (C.L.-F.), Hôpital de la Timone, Pôle de Neurosciences Cliniques, Marseille, France; CHU of Nice (G.M.), Nice, France; CHU Montpied, Neurology, Clermont-Ferrand, France (P.C.); APHM (J.P.), Hôpital de la Timone, Pôle de Neurosciences Cliniques, Service de Neurologie, CRCSEP Marseille, France; Institute of Clinical Neuroimmunology (I.M.), Ludwig-Maximilians University, Munich, Germany; Department of Neurology (S.W.), Clinics Osnabrück, Osnabrück, Germany; and Department of Neurology (F.G.), Innsbruck Medical University, Innsbruck, Austria.
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Catharina C. Gross
From the Department of Neurology with Institute of Translational Neurology (N.S., T.S.-H., P.O., L.K., C.C.G., S.G.M., H.W.), University of Münster, Münster, Germany; CRC-SEP—Neurosciences Department (B.P., F.B., L.S., J.C., D. Biotti, D. Brassat), CHU Toulouse, Toulouse, France; CPTP—INSERM U1043—CNRS U5282—Université Toulouse III (B.P., F.B., L.S., D. Brassat), Toulouse, France; APHM (C.L.-F.), Hôpital de la Timone, Pôle de Neurosciences Cliniques, Marseille, France; CHU of Nice (G.M.), Nice, France; CHU Montpied, Neurology, Clermont-Ferrand, France (P.C.); APHM (J.P.), Hôpital de la Timone, Pôle de Neurosciences Cliniques, Service de Neurologie, CRCSEP Marseille, France; Institute of Clinical Neuroimmunology (I.M.), Ludwig-Maximilians University, Munich, Germany; Department of Neurology (S.W.), Clinics Osnabrück, Osnabrück, Germany; and Department of Neurology (F.G.), Innsbruck Medical University, Innsbruck, Austria.
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Sven G. Meuth
From the Department of Neurology with Institute of Translational Neurology (N.S., T.S.-H., P.O., L.K., C.C.G., S.G.M., H.W.), University of Münster, Münster, Germany; CRC-SEP—Neurosciences Department (B.P., F.B., L.S., J.C., D. Biotti, D. Brassat), CHU Toulouse, Toulouse, France; CPTP—INSERM U1043—CNRS U5282—Université Toulouse III (B.P., F.B., L.S., D. Brassat), Toulouse, France; APHM (C.L.-F.), Hôpital de la Timone, Pôle de Neurosciences Cliniques, Marseille, France; CHU of Nice (G.M.), Nice, France; CHU Montpied, Neurology, Clermont-Ferrand, France (P.C.); APHM (J.P.), Hôpital de la Timone, Pôle de Neurosciences Cliniques, Service de Neurologie, CRCSEP Marseille, France; Institute of Clinical Neuroimmunology (I.M.), Ludwig-Maximilians University, Munich, Germany; Department of Neurology (S.W.), Clinics Osnabrück, Osnabrück, Germany; and Department of Neurology (F.G.), Innsbruck Medical University, Innsbruck, Austria.
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Florian Deisenhammer
From the Department of Neurology with Institute of Translational Neurology (N.S., T.S.-H., P.O., L.K., C.C.G., S.G.M., H.W.), University of Münster, Münster, Germany; CRC-SEP—Neurosciences Department (B.P., F.B., L.S., J.C., D. Biotti, D. Brassat), CHU Toulouse, Toulouse, France; CPTP—INSERM U1043—CNRS U5282—Université Toulouse III (B.P., F.B., L.S., D. Brassat), Toulouse, France; APHM (C.L.-F.), Hôpital de la Timone, Pôle de Neurosciences Cliniques, Marseille, France; CHU of Nice (G.M.), Nice, France; CHU Montpied, Neurology, Clermont-Ferrand, France (P.C.); APHM (J.P.), Hôpital de la Timone, Pôle de Neurosciences Cliniques, Service de Neurologie, CRCSEP Marseille, France; Institute of Clinical Neuroimmunology (I.M.), Ludwig-Maximilians University, Munich, Germany; Department of Neurology (S.W.), Clinics Osnabrück, Osnabrück, Germany; and Department of Neurology (F.G.), Innsbruck Medical University, Innsbruck, Austria.
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David Brassat
From the Department of Neurology with Institute of Translational Neurology (N.S., T.S.-H., P.O., L.K., C.C.G., S.G.M., H.W.), University of Münster, Münster, Germany; CRC-SEP—Neurosciences Department (B.P., F.B., L.S., J.C., D. Biotti, D. Brassat), CHU Toulouse, Toulouse, France; CPTP—INSERM U1043—CNRS U5282—Université Toulouse III (B.P., F.B., L.S., D. Brassat), Toulouse, France; APHM (C.L.-F.), Hôpital de la Timone, Pôle de Neurosciences Cliniques, Marseille, France; CHU of Nice (G.M.), Nice, France; CHU Montpied, Neurology, Clermont-Ferrand, France (P.C.); APHM (J.P.), Hôpital de la Timone, Pôle de Neurosciences Cliniques, Service de Neurologie, CRCSEP Marseille, France; Institute of Clinical Neuroimmunology (I.M.), Ludwig-Maximilians University, Munich, Germany; Department of Neurology (S.W.), Clinics Osnabrück, Osnabrück, Germany; and Department of Neurology (F.G.), Innsbruck Medical University, Innsbruck, Austria.
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Heinz Wiendl
From the Department of Neurology with Institute of Translational Neurology (N.S., T.S.-H., P.O., L.K., C.C.G., S.G.M., H.W.), University of Münster, Münster, Germany; CRC-SEP—Neurosciences Department (B.P., F.B., L.S., J.C., D. Biotti, D. Brassat), CHU Toulouse, Toulouse, France; CPTP—INSERM U1043—CNRS U5282—Université Toulouse III (B.P., F.B., L.S., D. Brassat), Toulouse, France; APHM (C.L.-F.), Hôpital de la Timone, Pôle de Neurosciences Cliniques, Marseille, France; CHU of Nice (G.M.), Nice, France; CHU Montpied, Neurology, Clermont-Ferrand, France (P.C.); APHM (J.P.), Hôpital de la Timone, Pôle de Neurosciences Cliniques, Service de Neurologie, CRCSEP Marseille, France; Institute of Clinical Neuroimmunology (I.M.), Ludwig-Maximilians University, Munich, Germany; Department of Neurology (S.W.), Clinics Osnabrück, Osnabrück, Germany; and Department of Neurology (F.G.), Innsbruck Medical University, Innsbruck, Austria.
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From the Department of Neurology with Institute of Translational Neurology (N.S., T.S.-H., P.O., L.K., C.C.G., S.G.M., H.W.), University of Münster, Münster, Germany; CRC-SEP—Neurosciences Department (B.P., F.B., L.S., J.C., D. Biotti, D. Brassat), CHU Toulouse, Toulouse, France; CPTP—INSERM U1043—CNRS U5282—Université Toulouse III (B.P., F.B., L.S., D. Brassat), Toulouse, France; APHM (C.L.-F.), Hôpital de la Timone, Pôle de Neurosciences Cliniques, Marseille, France; CHU of Nice (G.M.), Nice, France; CHU Montpied, Neurology, Clermont-Ferrand, France (P.C.); APHM (J.P.), Hôpital de la Timone, Pôle de Neurosciences Cliniques, Service de Neurologie, CRCSEP Marseille, France; Institute of Clinical Neuroimmunology (I.M.), Ludwig-Maximilians University, Munich, Germany; Department of Neurology (S.W.), Clinics Osnabrück, Osnabrück, Germany; and Department of Neurology (F.G.), Innsbruck Medical University, Innsbruck, Austria.
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Prospective validation of the PML risk biomarker l-selectin and influence of natalizumab extended intervals
Nicholas Schwab, Tilman Schneider-Hohendorf, Béatrice Pignolet, Florence Bucciarelli, Lise Scandella, Jonathan Ciron, Damien Biotti, Christine Lebrun-Frenay, Guillaume Mathey, Pierre Clavelou, Jean Pelletier, Patrick Ostkamp, Ingrid Meinl, Susanne Windhagen, Luisa Klotz, Catharina C. Gross, Sven G. Meuth, Florian Deisenhammer, David Brassat, Heinz Wiendl, on behalf of the Best-MS Study Group
Neurology Sep 2019, 93 (12) 550-554; DOI: 10.1212/WNL.0000000000008135

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Low l-selectin (CD62L) on CD4+ T cells after cryopreservation has been introduced in 2013 as a risk biomarker for the development of progressive multifocal leukoencephalopathy (PML) during natalizumab treatment1 or HIV infection.2 The biomarker has been reproduced retrospectively in some international cohorts,3,4 but not in others,5 potentially because of its sensitivity to biomaterial quality, assay protocols, and the time point of testing. With regard to current approaches to PML risk reduction, natalizumab extended interval dosing is thought to improve immune surveillance and reduce PML risk, whereas clinical efficacy seems unaffected.6

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  • Go to Neurology.org/N for full disclosures. Funding information and disclosures deemed relevant by the authors, if any, are provided at the end of the article.

  • ↵* These authors contributed equally.

  • The coinvestigators are listed at links.lww.com/WNL/A979.

  • Received February 8, 2019.
  • Accepted in final form June 25, 2019.
  • © 2019 American Academy of Neurology
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Disputes & Debates: Rapid online correspondence

  • Author response: Prospective validation of the PML risk biomarker l-selectin and influence of natalizumab extended intervals
    • Nicholas Schwab, Scientist, University of Muenster, (Muenster, Germany)
    • Tilman Schneider-Hohendorf, Scientist, University of Muenster, (Muenster, Germany)
    • Béatrice Pignolet, Scientist, University of Toulouse (Toulouse, France)
    • David Brassat, Neurologist, University of Toulouse (Toulouse, France)
    • Heinz Wiendl, Neurologist, University of Muenster (Muenster, Germany)
    Submitted October 25, 2019
  • Reader response: Prospective validation of the PML risk biomarker l-selectin and influence of natalizumab extended intervals
    • Bastian Tugemann, Mathematician, Munich, Germany
    Submitted October 15, 2019
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