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2 protocols using anti cd27 apc vio770

1

Quantification of Circulating CXCR5+ T Cells

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The cells were stimulated for 5 h with anti-CD3/28 beads (Miltenyi Biotec, Auburn, CA, USA) and stained according to the manufacturer’s instructions. Cells were analyzed using an LSRFortessa cell analyzer (BD, Mississauga, ON, Canada). The gating strategy is displayed in Supplementary Figure 1. The following labeling antibodies were used: anti-CD4-VioBlue, anti-CXCR5-PE-Vio770, anti-ICOS-VioGreen, anti-CD19-VioBlue, anti-CD27-APC-Vio770, anti-CD38-FITC (Miltenyi), anti-PD1-FITC, and anti-CCR7-APC (BioLegend, San Diego, CA, USA). All antibodies were titrated against their respective isotypes. Flow cytometry data analyses were performed using the FlowJo vX software (FlowJo LLC). Absolute counts of CD4+CXCR5+ T cells in the peripheral blood were calculated by multiplying the percentages of CD4+CXCR5+ T cells measured by flow cytometry to the absolute counts of lymphocytes measured by the clinical hematology laboratory of the hospital using a blood sample drawn the same day.
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2

Isolation of Immune Cell Subsets from CSF

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The index patients’ parents have given written informed consent, and analyses were approved by the Charité University Hospital Institutional Review Board.
4 ml of CSF was collected during the acute phase of encephalitis (Nikolaus et al., 2018 (link)) and immediately processed for cell pellet cryopreservation, therefore centrifuged for 10 min at 400× g, with supernatant stored at −80°C and the pellet resuspended in 500 µl of 10% dimethyl sulfoxide, 45% fetal calf serum, 45% RPMI medium before freezing at −80°C. PPE was collected 6 d after lumbar puncture and stored at −80°C.
We used fluorescence-activated cell sorting to isolate single CD138+ ASCs, CD20+CD27+ MBCs, and CD20+CD27 NMBCs from preselected viable CD3CD14CD16DAPI lymphocytes into 96-well PCR plates. The following antibodies were applied: anti–CD3-FITC (1:25; Miltenyi Biotec; #130-098-162), anti–CD14-FITC (1:25; Miltenyi Biotec; #130-098-063), anti–CD16-FITC (1:25; Miltenyi Biotec; #130-098-099), anti–CD20-PerCP-Vio700 (1:50; Miltenyi Biotec; #130-100-435), anti–CD27-APC-Vio770 (1:12.5; Miltenyi Biotec; #130-098-605), and anti–CD138-PE (1:50; Miltenyi; #130-098-122).
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