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- W4367303940 abstract "<h3>Objective:</h3> To assess potential rebound disease recrudescence in participants with relapsing multiple sclerosis (MS) after tolebrutinib Phase 2b trial (NCT03889639) placebo run-out period. <h3>Background:</h3> Rebound disease activity has been reported after discontinuing some MS disease-modifying treatments. The 16-week, double-blind, crossover, Phase 2b trial of brain-penetrant tolebrutinib in participants with RMS showed dose-dependent reductions in new gadolinium-enhancing T1 and new/enlarging T2-lesions. The unique crossover design with 4-week placebo run-in/run-out periods minimizing placebo exposure enabled assessment of potential rebound disease after tolebrutinib discontinuation. <h3>Design/Methods:</h3> 130 participants were randomized (1:1:1:1) to tolebrutinib 5, 15, 30, or 60 mg/day. MRI scans were obtained at screening and every 4 weeks for 16 weeks. Cohort 1 (n=64) received tolebrutinib for 12 weeks followed by 4-week placebo run-out; Cohort 2 (n=66) received 4-week placebo run-in followed by 12 weeks of tolebrutinib. <h3>Results:</h3> There was one relapse during Cohort 1 placebo run-out (98.4% relapse-free) vs four relapses in Cohort 2 placebo run-in (93.9% relapse-free). After 12 weeks of tolebrutinib treatment (Cohort 1), 83.3% of participants had no new gadolinium-enhancing lesions; after 4-week placebo run-out, 85.2% had no new gadolinium-enhancing lesions. In Cohort 1, mean±SD gadolinium-enhancing lesion count after 12 weeks of tolebrutinib was 0.37±0.99 and 0.44±1.70 after 4-week placebo run-out. In Cohort 1 participants receiving tolebrutinib 60 mg/day, mean±SD gadolinium-enhancing lesion count was 0.20±0.56 after 12 weeks of tolebrutinib and 0.31±0.70 after 4-week placebo run-out. The mean±SD gadolinium-enhancing lesion count after 4-week placebo run-in (Cohort 2) was 1.03±2.50. At Week 12 in Cohort 1, mean number of new/enlarging T2-lesions was 0.58±1.27 vs 0.95±2.72 after 4-week placebo run-out; meanwhile it was 2.12±5.16 after 4-week placebo run-in (Cohort 2). <h3>Conclusions:</h3> These preliminary findings suggest tolebrutinib discontinuation in participants with RMS does not induce rebound disease activity; longer observation periods are needed to validate this finding. <b>Disclosure:</b> Dr. Traboulsee has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Roche. Dr. Traboulsee has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Sanofi Genzyme. Dr. Traboulsee has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Novartis. Dr. Traboulsee has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Roche. Dr. Traboulsee has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Roche. Dr. Traboulsee has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Sanofi Genzyme. The institution of Dr. Traboulsee has received research support from Roche. The institution of Dr. Traboulsee has received research support from Genzyme. Dr. Fox has received personal compensation in the range of $500-$4,999 for serving as a Consultant for AB Science. Dr. Fox has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for Janssen. Dr. Fox has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for Biogen. Dr. Fox has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for Celgene. Dr. Fox has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for EMD Serono. Dr. Fox has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for Genentech. Dr. Fox has received personal compensation in the range of $10,000-$49,999 for serving as a Consultant for Immunic. Dr. Fox has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for Novartis. Dr. Fox has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for Sanofi. Dr. Fox has received personal compensation in the range of $500-$4,999 for serving as a Consultant for TG Therapeutics. Dr. Fox has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for Genzyme. Dr. Fox has received personal compensation in the range of $5,000-$9,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Biogen. Dr. Fox has received personal compensation in the range of $5,000-$9,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Immunic. Dr. Fox has received personal compensation in the range of $5,000-$9,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Novartis. Dr. Fox has received personal compensation in the range of $5,000-$9,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Janssen. Dr. Fox has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for AB Science. The institution of Dr. Fox has received research support from National Institutes of Health. Dr. Fox has received publishing royalties from a publication relating to health care. Dr. Arnold has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for Biogen. Dr. Arnold has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for Celgene. Dr. Arnold has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Frequency Therapeutics. Dr. Arnold has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for Merck. Dr. Arnold has received personal compensation in the range of $10,000-$49,999 for serving as a Consultant for Novartis. Dr. Arnold has received personal compensation in the range of $10,000-$49,999 for serving as a Consultant for Roche. Dr. Arnold has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for Sanofi. Dr. Arnold has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Shionogi. Dr. Arnold has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Xfacto communications. Dr. Arnold has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Eli Lilly. Dr. Arnold has received personal compensation in the range of $500-$4,999 for serving as a Consultant for EMD Serono. Dr. Arnold has stock in NeuroRx. Dr. Syed has received personal compensation for serving as an employee of Sanofi US. Dr. Orogun has nothing to disclose. Deborah Dukovic has received personal compensation for serving as an employee of Sanofi. Deborah Dukovic has stock in Sanofi. Timothy J. Turner has received personal compensation for serving as an employee of Sanofi. Timothy J. Turner has received stock or an ownership interest from Sanofi. Timothy J. Turner has received intellectual property interests from a discovery or technology relating to health care. Dr. Reich has received research support from NIH. The institution of Dr. Reich has received research support from Vertex Pharmaceuticals. The institution of Dr. Reich has received research support from Adelson Medical Research Foundation. The institution of Dr. Reich has received research support from Myelin Repair Foundation. The institution of Dr. Reich has received research support from Sanofi-Genzyme. The institution of Dr. Reich has received research support from Abata Therapeutics. The institution of Dr. Reich has received research support from National Multiple Sclerosis Society. Dr. Reich has received personal compensation in the range of $500-$4,999 for serving as a CME Faculty with PeerView. Dr. Reich has received personal compensation in the range of $500-$4,999 for serving as a CME Faculty with AcademicCME. Dr. Reich has a non-compensated relationship as a Advisor with Sanofi-Genzyme that is relevant to AAN interests or activities. Dr. Reich has a non-compensated relationship as a Board of Directors with ACTRIMS that is relevant to AAN interests or activities. Dr. Reich has a non-compensated relationship as a Advisor with Abata Therapeutics that is relevant to AAN interests or activities. Dr. Reich has a non-compensated relationship as a Advisor with Roche that is relevant to AAN interests or activities. Dr. Reich has a non-compensated relationship as a Advisor with American Brain Foundation that is relevant to AAN interests or activities. Dr. Reich has a non-compensated relationship as a Advisor with University of Basel RC2NB that is relevant to AAN interests or activities. Dr. Reich has a non-compensated relationship as a Advisor with Multiple Sclerosis Society of Canada that is relevant to AAN interests or activities. Dr. Reich has a non-compensated relationship as a Advisor with Tuscan Doctorate in Neuroscience that is relevant to AAN interests or activities. Dr. Reich has a non-compensated relationship as a Editorial Board with Multiple Sclerosis Journal that is relevant to AAN interests or activities. Dr. Reich has a non-compensated relationship as a Advisor with Glaxo-Smith-Kline that is relevant to AAN interests or activities. Dr. Oh has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for Roche. The institution of Dr. Oh has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for Biogen-Idec. Dr. Oh has received personal compensation in the range of $500-$4,999 for serving as a Consultant for BMS. Dr. Oh has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for EMD-Serono. Dr. Oh has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for Sanofi-Genzyme. Dr. Oh has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Novartis. Dr. Oh has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Eli Lilly. Dr. Oh has received personal compensation in the range of $0-$499 for serving on a Scientific Advisory or Data Safety Monitoring board for Roche. Dr. Oh has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Biogen-Idec. Dr. Oh has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Sanofi-Genzyme. The institution of Dr. Oh has received research support from Biogen-Idec. The institution of Dr. Oh has received research support from EMD-Serono. The institution of Dr. Oh has received research support from Biogen-Idec." @default.
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- W4367303940 date "2023-04-25" @default.
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- W4367303940 title "Lack of Rebound Disease Activity in Participants with Relapsing Multiple Sclerosis Following Placebo Run-out in the Tolebrutinib Phase 2b Trial (P6-3.006)" @default.
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