Immune Cell Isolation and Analysis

Prior to perfusion, spleens were harvested from experimental mice. Single cell suspensions from spleens were treated with ACK erythrocyte lysis buffer. Mice were perfused with 25 mL of ice-cold PBS and brains and spinal cords were collected from perfused mice and dounce homogenized to obtain single cell suspensions. CNS cells were purified by centrifugation for 30 min in a 30% Percoll (GE Healthcare) solution as previously reported (25 (link)). Cells were incubated with the anti-Fc receptor antibody 2.4G2 prior to the addition of antibodies. The following antibodies were purchased from BD Biosciences: CD45-FITC, CD8α-APC-H7, CD19-APC-H7, CD19-BV510, B220-PE-TxRed, B220–PE-CF594, CD11b-AlexaFluor-700, MHC-v450. The following antibodies were purchased from eBioscience: MHCII-Pacific Blue, CD11c-PECy7. The following antibodies were purchased from BioLegend (San Diego, CA): CD138-PE, MHCII (I-A/I-E)-Pacific Blue, Thy1.1-PerCP, CD4-APC. Cells were acquired on a Gallios flow cytometer (Beckman Coulter) and analyzed with FloJo software (TreeStar) with doublets being excluded.