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6 protocols using magnetic cd4 t cell isolation kit

1

Isolation of Mouse CD4+ and CD8+ T Cells

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A single-cell suspension from mouse spleen was prepared using gentleMACS Dissociator (no. 130-093-235; Miltenyi Biotec). CD4+ and CD8+ T cells were then isolated from this single-cell suspension using the magnetic CD4+ T Cell Isolation Kit (no. 130-104-454; Miltenyi Biotec) or CD8+ T Cell Isolation Kit (no. 130-104-075; Miltenyi Biotec) according to the manufacturer’s instructions.
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2

Isolation of Mouse CD4+ and CD8+ T Cells

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A single-cell suspension from mouse spleen was prepared using gentleMACS Dissociator (no. 130-093-235; Miltenyi Biotec). CD4+ and CD8+ T cells were then isolated from this single-cell suspension using the magnetic CD4+ T Cell Isolation Kit (no. 130-104-454; Miltenyi Biotec) or CD8+ T Cell Isolation Kit (no. 130-104-075; Miltenyi Biotec) according to the manufacturer’s instructions.
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3

Chemotaxis Assay for Thymocytes

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CD4 SP thymocytes from WT and X-MAID mice were isolated by negative selection using a magnetic CD4+ T cell isolation kit (Miltenyi) and resuspended in DMEM with 10% charcoal stripped FBS (Gibco). 2x105 cells per well were placed in the top chambers of a 24 well transwell plate (5μm pore size, Corning) and allowed to settle at 37°C for 10 minutes. The top chambers were then placed on top of bottom chambers containing 100ng/ml CCL19, and incubated for 2 hours at 37°C. Top chambers were then removed and cells in the bottom chambers were counted using a hemocytometer. Percent migration was calculated based on input cell numbers.
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4

CD4+ T Cell Subset Isolation

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Retina and secondary lymphoid organs (SLO, including draining LN and spleens) from CAU mice (week 12 – 16 post-induction) were harvested and pooled, and CD4+ T cells were isolated via negative selection with a magnetic CD4+ T cell isolation kit (Cat #: 130-104-454, Miltenyi Biotec Inc.). The isolated cells were >98% CD4+ as confirmed by flow cytometry, and they were stained with FITC- or PerCP/Cy5.5-anti-CD44 (clone IM7, Cat #: 103006 or 103032, BioLegend) antibody, and sorted for CD44hi memory and CD44−~lo control subpopulations using a MoFlo® FACS sorter (Dako Cytomation) or a BD FACSAria III sorter (BD Biosciences). The sorted cells in equal live numbers (1×105) were cultured for 5 days and stained with 7-AAD (Cat #: 00-6993-50, ThermoFisher), and the viable cells were determined as 7-AAD unstained populations by flow cytometric analysis.
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5

CCL19-Induced Signaling in Thymocytes

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CD4 SP thymocytes from WT and X-MAID mice were isolated by negative selection using a magnetic CD4+ T cell isolation kit (Miltenyi). Cells were starved for 4 hours in serum-free DMEM (Corning) before stimulation 100ng/ml CCL19 (R&D Systems) for the indicated times. Cells were then lysed with 1% Triton X100, 50 mM Tris-HCl, 50 mM NaCl, 5 mM EDTA, 50 mM NaF, 30 mM Na4P2O7, 50 mM β-glycerophosphate, with Roche Complete protease inhibitors. Proteins were separated by SDS/PAGE (4-12% NuPAGE bis-tris gel, Invitrogen) transferred to nitrocellulose membranes, blocked with Odyssey buffer (Licor) and probed for the indicated proteins. Antibodies to pERK1/2 (Thr202/Tyr204) and pAkt (Ser473) were from Cell Signaling Technologies. GAPDH was used as a loading control, and was detected with Clone 6C5 antibody, from Sigma. Primary antibodies were detected with fluorescent secondary antibodies (anti-rabbit AlexaFluor 800 or anti-mouse AlexaFluor 680, from Invitrogen). Blots were imaged using an Odyssey fluorescence-based imaging system (Licor) and prepared for publication using ImageLite Software (Licor).
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6

Isolation and Sorting of CD4+ T Cell Subsets

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Retina and secondary lymphoid organs (SLO, including draining LN and spleens) from CAU mice (week 12 -16 post-induction) were harvested and pooled, and CD4 + T cells were isolated via negative selection with a magnetic CD4 + T cell isolation kit (Cat #: 130-104-454, Miltenyi Biotec Inc.). The isolated cells were >98% CD4 + as confirmed by flow cytometry, and they were stained with FITC-or PerCP/Cy5.5-anti-CD44 (clone IM7, Cat #: 103006 or 103032, BioLegend) antibody, and sorted for CD44 hi memory and CD44 -~lo control subpopulations using a MoFlo ® FACS sorter (Dako Cytomation) or a BD FACSAria ™ III sorter (BD Biosciences). The sorted cells in equal live numbers (1×10 5 ) were cultured for 5 days and stained with 7-AAD (Cat #: 00-6993-50, ThermoFisher), and the viable cells were determined as 7-AAD unstained populations by flow cytometric analysis.
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