Naïve mice were immunized with 50μg of PLP peptide (either P178 or P139) or OVA323–339 in CFA. At day 14, spleens and inguinal lymph nodes were collected and reactivated in culture with cognate antigens and hIL-2 for 72hr as previously described (4 (link), 7 (link)–11 (link), 18 ). At the end of culture, cells were collected, and CD8 T cells were magnetically isolated using Ly-2 microbeads (Miltenyi) and 10×106 live cells were transferred to recipient mice. Mice received CD8 T cell transfers i.v. prior to disease induction (d-1) or during the acute phase of disease (d11).