RT Journal Article SR Electronic T1 Natalizumab (Tysabri) JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 1588 OP 1590 DO 10.3174/ajnr.A2226 VO 31 IS 9 A1 Selewski, D.T. A1 Shah, G.V. A1 Segal, B.M. A1 Rajdev, P.A. A1 Mukherji, S.K. YR 2010 UL http://www.ajnr.org/content/31/9/1588.abstract AB SUMMARY: Natalizumab is a humanized IgG4κ monoclonal antibody that is a selective adhesion molecule inhibitor, which prevents adhesion of leukocytes to endothelial cells. It is the first monoclonal antibody approved by the FDA for the treatment of relapsing-remitting MS. This article will review the mechanism of action and clinical role of this agent. FDAUS Food and Drug AdministrationFLAIRfluid-attenuated inversion recoveryFSEfast spin-echoIgGimmunoglobulin GMAdCAM-1mucosal adressin cell adhesion moleculeMSmultiple sclerosisPMLprogressive multifocal leukoencephalopathyTOUCHTysabri Outreach Unified Commitment to HealthVCAM -1vascular cell adhesion molecule-1