Antibody to mouse CD31 (clone 2H8) was purchased from AbDSerotec (Kidlington, UK) and rabbit polyclonal Antibody to NeuN was from Millipore (Darmstadt, Germany). Antibodies to neurofilament 200 and MBP were from Abcam (Cambridge, UK). Monoclonal antibody to β-gal (clone GAL-13) was from Sigma (St. Louis, MO). PE-conjugated anti-mouse CD45 (clone 30-F11), APC-conjugated anti-mouse CD11b (clone M1/70) and PE-conjugated anti-mouse Ly6G (clone 1A8) were from BD Biosciences (Heidelberg, Germany). FITC-conjugated anti-mouse CD4 (clone GK1.5) and PerCP-conjugated anti-mouse CD8 (clone 53-6.7) were from Miltenyi Biotec (Bergisch Gladbach, Germany). APC-conjugated anti-mouse F4/80 (clone BM8), FITC-conjugated anti-mouse IL-17A (clone eBio17B7) and APC-conjugated anti-mouse IFN-γ (clone XMG1.2) and FITC-conjugated anti mouse CD45 were from eBioscience (Frankfurt, Germany). Rat anti-mouse CD8α (clone 53-6.7) was from Novusbio (Littleton, CO). Rabbit polyclonal antibody to IL-17 was from Abcam (Cambridge, UK). Goat anti-rat Alexa 568 and goat anti-rabbit Alexa 488 were from Life Technologies (Darmstadt, Germany). Del-1-Fc was constructed, expressed, and purified as previously described17 (link).