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  • Title: Blocking adhesion molecules as therapy for multiple sclerosis: natalizumab.
    Author: Steinman L.
    Journal: Nat Rev Drug Discov; 2005 Jun; 4(6):510-8. PubMed ID: 15931259.
    Abstract:
    Immunologists have long hypothesized that particular 'molecular addresses' govern lymphocyte entry to a given organ. In 1992, alpha4beta1 integrin was identified as the key molecule involved in homing to inflamed regions of the brain. An antibody to alpha4beta1integrin blocked paralysis in an animal model of multiple sclerosis, and the humanized monoclonal antibody natalizumab, which binds alpha4beta1 integrin, reduced relapses 66% in clinical trials in multiple sclerosis. Three months after its expedited approval by the FDA, natalizumab was removed from the market after two cases of deadly progressive multifocal leukoencephalopathy were reported among the few thousand patients who had taken this drug in those clinical trials.
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