Reduction of the peripheral blood CD56 bright natural killer lymphocyte subset in FTY720-treated MS patients Trina A Johnson *,‡ , Barbara L Evans * , Bryce A Durafourt * , Manon Blain * , Yves Lapierre † , Amit Bar-Or *,†,‡ , Jack P Antel *,† . * Neuroimmunology Unit, Montreal Neurological Institute, †Department of Neurology and Neurosurgery, ‡Experimental Therapeutics Program, Montreal Neurological Institute, McGill University, Montreal, Quebec, Canada Word Count (Abstract): 232 Word Count (Text): 5154 Title (character count): 94 Number of references: 46 Number of figures: 9 Corresponding Author Contact Information: Dr. Jack P. Antel, Room 111Neuroimmunology Unit, Montreal Neurological Institute, 3801 University, Montreal, QC, Canada H3A 2B4 phone: (514) 398 8531 fax : (514) 398 7371 e-mail: jack.antel@mcgill.ca Abbreviations : MS, Multiple Sclerosis; SLOs, secondary lymphoid organs; S1P, sphingosine 1phosphate; MS-FTY, FTY720-treated MS patients. Running Head (43 characters): Peripheral NK cells in FTY720-treated MS patients Statistical analysis and all experiments within were performed by T.A Johnson. Jack P. Antel had full access to all of the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis. All authors have seen and agree with the contents included in this manuscript. This manuscript is not being reviewed with any other publication.