PMID- 20039942 OWN - NLM STAT- MEDLINE DCOM- 20110110 LR - 20191210 IS - 1468-1331 (Electronic) IS - 1351-5101 (Linking) VI - 17 IP - 5 DP - 2010 May TI - Different responses to interferon beta-1b treatment in patients with neuromyelitis optica and multiple sclerosis. PG - 672-6 LID - 10.1111/j.1468-1331.2009.02897.x [doi] AB - BACKGROUND: Although the benefit of treatment for relapsing-remitting multiple sclerosis (MS) is firmly established, whether interferon beta-1b (IFNB-1b) therapy is efficacious for neuromyelitis optica (NMO) has been debated. METHODS: We reviewed the responses to IFNB-1b treatment in 18 patients with relapsing NMO and compared the results with those from 38 patients with relapsing-remitting MS. We compared clinical characteristics, the annualized relapse rate (ARR) and the probability of being relapse free before and after IFNB-1b treatment in patients with NMO and MS. RESULTS: The proportion of patients with more than 50% increase in the ARR after IFNB-1b treatment was much higher in NMO than in MS (P = 0.046). ARR was significantly lower in patients with MS after IFNB-1b administration than before (P = 0.015), but not in NMO. Kaplan-Meier and log-rank statistical analyses revealed that relapse-free rates were lower in NMO than MS after IFNB-1b treatment (P = 0.032). The analyses also showed lower relapse-free rates during the pre-IFNB-1b treatment period than the post-IFNB-1b treatment period in MS (P < 0.001), but not in NMO. CONCLUSION: IFNB-1b treatment does not appear to be effective for preventing relapse in NMO likely because of differences between the immune-pathogenesis of NMO and MS. FAU - Uzawa, A AU - Uzawa A AD - Department of Neurology, Graduate School of Medicine, Chiba University, Chiba, Japan. a-uzimp1204@graduate.chiba-u.jp FAU - Mori, M AU - Mori M FAU - Hayakawa, S AU - Hayakawa S FAU - Masuda, S AU - Masuda S FAU - Kuwabara, S AU - Kuwabara S LA - eng PT - Comparative Study PT - Journal Article DEP - 20091221 PL - England TA - Eur J Neurol JT - European journal of neurology JID - 9506311 RN - 0 (Adjuvants, Immunologic) RN - 145155-23-3 (Interferon beta-1b) RN - 77238-31-4 (Interferon-beta) SB - IM MH - Adjuvants, Immunologic/administration & dosage/adverse effects MH - Adult MH - Female MH - Humans MH - Immunity, Cellular MH - Interferon beta-1b MH - Interferon-beta/*administration & dosage/adverse effects MH - Lymphocytes/immunology/pathology MH - Male MH - Middle Aged MH - Multiple Sclerosis/*drug therapy/immunology MH - Multiple Sclerosis, Relapsing-Remitting/drug therapy/immunology MH - Neuromyelitis Optica/*drug therapy/immunology MH - Outcome Assessment, Health Care/methods MH - Recurrence MH - Retrospective Studies MH - Treatment Failure MH - Treatment Outcome EDAT- 2009/12/31 06:00 MHDA- 2011/01/11 06:00 CRDT- 2009/12/31 06:00 PHST- 2009/12/31 06:00 [entrez] PHST- 2009/12/31 06:00 [pubmed] PHST- 2011/01/11 06:00 [medline] AID - ENE2897 [pii] AID - 10.1111/j.1468-1331.2009.02897.x [doi] PST - ppublish SO - Eur J Neurol. 2010 May;17(5):672-6. doi: 10.1111/j.1468-1331.2009.02897.x. Epub 2009 Dec 21.