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Biogen Reports Top-Line Results from Phase 2b Study of Natalizumab in Acute Ischemic StrokeBiogen (Nasdaq: BIIB) announced today that in the Phase 2b dose-ranging ACTION 2 study in individuals with acute ischemic stroke (AIS), natalizumab did not demonstrate improvement in clinical outcomes compared to placebo. Both doses of natalizumab were generally well-tolerated and no new or important safety signals were observed. The results of the Phase 2b ACTION 2 study do not impact the benefit-risk profile of natalizumab in approved indications, including multiple sclerosis. "As pioneers in neuroscience, Biogen remains committed to developing treatments for people with acute neurological conditions including stroke," said Michael Ehlers, executive vice president, Research & Development at Biogen. "While we are disappointed with the ACTION 2 study results, we have furthered our knowledge of the disease and will continue to pursue innovative approaches in this area, including BIIB093 (intravenous glibenclamide) for prevention and treatment of edema in large hemispheric infarction, one of the most severe types of stroke." In the middle of 2018, Biogen plans to initiate a global Phase 3 study of BIIB093 in individuals with large hemispheric infarction, where brain swelling (cerebral edema) often leads to high morbidity and mortality. Detailed Phase 2b ACTION 2 study findings will be made available in a future scientific forum.
About the natalizumab Phase 2 Development Program in AIS The primary objective of ACTION 2 was to assess the effects of natalizumab compared to placebo on clinical measures of independence and activities of daily living. The primary endpoint was a composite global measure of functional disability based on a score of 0 to 1 on a modified Rankin scale (mRS) and a score of = 95 on the Barthel Index (BI) at Day 90. The mRS measures independence with specific tasks pre- and post-stroke. BI is a scale that consists of 10 items that measure activities of daily living and mobility. Natalizumab was previously evaluated in AIS in the Phase 2a ACTION study. In this study, although natalizumab did not significantly decrease the primary endpoint of infarct volume at Day 5, secondary and exploratory endpoints suggested natalizumab treatment improved clinical outcomes compared with placebo which warranted further evaluation.
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Biogen Safe Harbor These statements involve risks and uncertainties that could cause actual results to differ materially from those reflected in such statements, including without limitation unexpected concerns that may arise from additional data, analysis or results obtained during clinical trials; regulatory authorities may require additional information or further studies, or may fail or refuse to approve or may delay approval of Biogen's drug candidates or expansion of product labeling, including, as applicable, natalizumab and/or BIIB093; risks of unexpected costs or delays; uncertainty of success in the development and potential commercialization of natalizumab and/or BIIB093, which may be impacted by, among other things, failure to protect and enforce Biogen's data, intellectual property and other proprietary rights and uncertainties relating to intellectual property claims and challenges; Biogen may encounter other unexpected hurdles which may be impacted by, among other things, the occurrence of adverse safety events or failure to obtain regulatory approvals in certain jurisdictions; product liability claims; or third party collaboration risks. The foregoing sets forth many, but not all, of the factors that could cause actual results to differ from Biogen's expectations in any forward-looking statement. Investors should consider this cautionary statement, as well as the risk factors identified in Biogen's most recent annual or quarterly report and in other reports Biogen has filed with the Securities and Exchange Commission. These statements are based on Biogen's current beliefs and expectations and speak only as of the date of this press release. Biogen does not undertake any obligation to publicly update any forward-looking statements, whether as a result of new information, future developments, or otherwise.
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