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OʼConnor, Paul; Goodman, Andrew; Kappos, Ludwig; Lublin, Fred; Polman, Chris; Rudick, Richard A; Hauswirth, Kathy; Cristiano, Lynda M; Forrestal, Fiona; Duda, Petra
Neurology, 2014-July-1, Letnik: 83, Številka: 1Journal Article
OBJECTIVES:Report long-term safety and effectiveness of natalizumab over 240 weeks in the prospective, observational, open-label Safety of TYSABRI Re-dosing and Treatment (STRATA) Study. METHODS:Patients (N = 1,094) previously enrolled in natalizumab multiple sclerosis clinical trials received natalizumab 300 mg IV every 4 weeks, up to 240 weeks. Serious adverse events, Expanded Disability Status Scale (EDSS) scores, and annualized relapse rates were analyzed. RESULTS:At data cutoff (February 9, 2012), natalizumab exposure was 3,460 patient-years; a median of 56 (range 1–70) infusions were received. Serious adverse events, including progressive multifocal leukoencephalopathy, were consistent with natalizumabʼs known profile. Upon natalizumab re-exposure, rates of anti-natalizumab antibodies and hypersensitivity reactions were 3% and 5% overall, and 40% and 24% among patients with 1 to 2 prior natalizumab doses. Patients originally randomized to placebo/another disease-modifying therapy vs natalizumab in previous studies had significantly higher EDSS scores at STRATA baseline; this difference persisted over 240 weeks. EDSS scores generally remained stable. Patients initially randomized to natalizumab had lower annualized relapse rates over 240 weeks. CONCLUSIONS:Serious adverse events were consistent with natalizumabʼs known safety profile; short exposure with a gap before redosing was associated with higher incidences of anti-natalizumab antibodies and hypersensitivity reactions. Stability of EDSS scores and consistently low relapse rates over 5 years of natalizumab treatment are consistent with its known efficacy profile. CLASSIFICATION OF EVIDENCE:This study provides Class III evidence that in patients with relapsing-remitting multiple sclerosis, natalizumab stabilizes EDSS scores, decreases relapse rates, and is associated with an increased risk of progressive multifocal leukoencephalopathy.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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