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Delay from treatment start to full effect of immunotherapies for multiple sclerosis

Izanne Roos 1, 2 Emmanuelle Leray 3, 4, 5 Federico Frascoli 6 Romain Casey 7 J William L Brown 8 Dana Horakova 9 Eva Havrdova 9 Maria Trojano 10 Francesco Patti 11 Guillermo Izquierdo 12 Sara Eichau 12 Marco Onofrj 13 Alessandra Lugaresi 14 Alexandre Prat 15 Marc Girard 15 Pierre Grammond Patrizia Sola Diana Ferraro 16 Serkan Ozakbas 17 Roberto Bergamaschi 18 Maria José Sá 19 Elisabetta Cartechini Cavit Boz 20 Franco Granella 21 Raymond Hupperts 22 Murat Terzi 23 Jeannette Lechner-Scott 24 Daniele Spitaleri Vincent van Pesch 25 Aysun Soysal 26 Javier Olascoaga 27 Julie Prevost Eduardo Aguera-Morales 28 Mark Slee Tunde Csepany Recai Turkoglu 29 Youssef Sidhom Riadh Gouider Bart van Wijmeersch 30 Pamela Mccombe 31 Richard Macdonell Alasdair Coles 32 Charles Malpas 33 Helmut Butzkueven 34 Sandra Vukusic Tomas Kalincik 33 Pierre Duquette 35 Francois Grand'Maison Gerardo Iuliano 36 Cristina Ramo-Tello Claudio Solaro Jose Antonio Cabrera-Gomez Maria Edite Rio Ricardo Fernandez Bolaños Vahid Shaygannejad Celia Oreja-Guevara Jose Luis Sanchez-Menoyo Thor Petersen Ayse Altintas Michael Barnett Shlomo Flechter Yara Fragoso Maria Pia Amato Fraser Moore Radek Ampapa Freek Verheul Suzanne Hodgkinson Edgardo Cristiano Bassem Yamout Guy Laureys Jose Andres Dominguez Cees Zwanikken Norma Deri Eniko Dobos Carlos Vrech Ernest Butler Csilla Rozsa Tatjana Petkovska-Boskova Rana Karabudak Cecilia Rajda Jabir Alkhaboori Maria Laura Saladino Cameron Shaw Neil Shuey Steve Vucic Angel Perez Sempere Jamie Campbell Imre Piroska Bruce Taylor Anneke van Der Walt Ludwig Kappos Etienne Roullet Orla Gray Magdolna Simo Carmen-Adella Sirbu Bruno Brochet François Cotton Jérôme de Sèze Armelle Dion Pascal Douek Francis Guillemin David Laplaud Christine Lebrun-Frenay Thibault Moreau Javier Olaiz Jean Pelletier Claire Rigaud-Bully Bruno Stankoff Romain Marignier Marc Debouverie Gilles Edan Jonathan Ciron Aurélie Ruet Nicolas Collongues Catherine Lubetzki Patrick Vermersch Pierre Labauge 37, 38 Gilles Defer Mikaël Cohen Agnès Fromont Sandrine Wiertlewsky Eric Berger Pierre Clavelou Bertrand Audoin Claire Giannesini Olivier Gout Eric Thouvenot Olivier Heinzlef Abdullatif Al-Khedr Bertrand Bourre Olivier Casez Philippe Cabre Alexis Montcuquet Alain Créange Jean-Philippe Camdessanché Justine Faure Aude Maurousset Ivania Patry Karolina Hankiewicz Corinne Pottier Nicolas Maubeuge 39 Céline Labeyrie 40 Chantal Nifle 
Abstract : In multiple sclerosis, treatment start or switch is prompted by evidence of disease activity. Whilst immunomodulatory therapies reduce disease activity, the time required to attain maximal effect is unclear. In this study we aimed to develop a method that allows identification of the time to manifest fully and clinically the effect of multiple sclerosis treatments (‘therapeutic lag’) on clinical disease activity represented by relapses and progression-of-disability events. Data from two multiple sclerosis registries, MSBase (multinational) and OFSEP (French), were used. Patients diagnosed with multiple sclerosis, minimum 1-year exposure to treatment, minimum 3-year pretreatment follow-up and yearly review were included in the analysis. For analysis of disability progression, all events in the subsequent 5-year period were included. Density curves, representing incidence of relapses and 6-month confirmed progression events, were separately constructed for each sufficiently represented therapy. Monte Carlo simulations were performed to identify the first local minimum of the first derivative after treatment start; this point represented the point of stabilization of treatment effect, after the maximum treatment effect was observed. The method was developed in a discovery cohort (MSBase), and externally validated in a separate, non-overlapping cohort (OFSEP). A merged MSBase-OFSEP cohort was used for all subsequent analyses. Annualized relapse rates were compared in the time before treatment start and after the stabilization of treatment effect following commencement of each therapy. We identified 11 180 eligible treatment epochs for analysis of relapses and 4088 treatment epochs for disability progression. External validation was performed in four therapies, with no significant difference in the bootstrapped mean differences in therapeutic lag duration between registries. The duration of therapeutic lag for relapses was calculated for 10 therapies and ranged between 12 and 30 weeks. The duration of therapeutic lag for disability progression was calculated for seven therapies and ranged between 30 and 70 weeks. Significant differences in the pre- versus post-treatment annualized relapse rate were present for all therapies apart from intramuscular interferon beta-1a. In conclusion we have developed, and externally validated, a method to objectively quantify the duration of therapeutic lag on relapses and disability progression in different therapies in patients more than 3 years from multiple sclerosis onset. Objectively defined periods of expected therapeutic lag allows insights into the evaluation of treatment response in randomized clinical trials and may guide clinical decision-making in patients who experience early on-treatment disease activity. This method will subsequently be applied in studies that evaluate the effect of patient and disease characteristics on therapeutic lag.
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Submitted on : Thursday, October 1, 2020 - 3:56:10 PM
Last modification on : Tuesday, November 22, 2022 - 5:36:08 PM

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Izanne Roos, Emmanuelle Leray, Federico Frascoli, Romain Casey, J William L Brown, et al.. Delay from treatment start to full effect of immunotherapies for multiple sclerosis. Brain - A Journal of Neurology , 2020, 143 (9), pp.2742-2756. ⟨10.1093/brain/awaa231⟩. ⟨hal-02955197⟩



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