Single-cell suspensions of spinal cord, spleen, and inguinal LNs were prepared as previously described [31 (link)]. The following antibodies were used: anti-CD4 PerCP-Cy5.5/APC/eFluor 450/PE-Cy7 (eBioscience, clone RM4-5), anti-CD45.1 FITC (eBioscience, clone A20), anti-CD45.2 PerCP-Cy5.5/APC (eBioscience, clone 104), and anti-CD44 FITC (eBioscience, clone IM7). For intracellular staining, cells were reactivated with culture media (negative control) or 5 μM MOG35−55 peptide for 7 h with GolgiPlug (BD Biosciences) added for the final 4 h. The following intracellular antibodies were used in accordance with the manufacturer’s protocols: anti-IFNγ eFluor 450 (eBioscience, clone XMG1.2), anti-IL17A Alexa Fluor 647 (eBioscience, clone eBio17B7), anti-GM-CSF PE (BD Biosciences, clone MP1-22E9). A viability dye (Aqua, Life Technologies) was applied to exclude dead cells. Samples were acquired by using an LSRII flow cytometer (BD Biosciences) followed by data analysis using FlowJo version 9.x (Tree Star).
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