
Important recent data (two-year follow up from the AFFIRM trial, presented at AAN; two-year follow up from the SENTINEL trial, presented at ECTRIMS) has emerged on the safety and efficacy of natalizumab, but this data may have been overlooked following the voluntary suspension of natalizumab in February, 2005. This suspension was in response to reports of the development of progressive multifocal leukoencephalopathy (PML) in three patients taking natalizumab and additional immunosuppressants. This program will provide a review of PML and its relationship both to MS and to immunosuppressant therapies. A discussion by the participants on their current view of natalizumab and targeted antibody immunotherapies in general, will follow along with a discussion of the screenings and safeguards necessary should natalizumab return to market.
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