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Cd45 ra fitc clone hi100

Manufactured by BioLegend

CD45 RA FITC (clone HI100) is a fluorescent antibody that binds to the CD45RA isoform of the CD45 protein. CD45 is a receptor-like protein tyrosine phosphatase that is expressed on the surface of leukocytes. The CD45RA isoform is found on naive T cells and some memory B cells.

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2 protocols using cd45 ra fitc clone hi100

1

PBMC Isolation and Immunophenotyping

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Peripheral blood mononuclear cells (PBMC) from healthy subjects were isolated from heparinized whole blood by density gradient centrifugation and 1x106 PBMCs were stained with viable and dead cells LIVE/DEAD™ Fixable Aqua dead cell stain kit (Life Technologies) for 15 min followed by an extracellular staining. First CCR7 PerCp Cy 5.5 was stained (clone G043H7, Biolegend) for 15 min at 37 °C followed by CD3 AF700 (clone OKT3, Biolegend), CD4 BV605 (clone RPA-T4, BD Biosciences), CD8 PB (clone SK1, Biolegend), CD45 RA FITC (clone HI100, Biolegend), CD56 APC-Cy7 (clone HCD56, Biolegend), CD19 PE-Cy7 (clone HIB19, Biolegend), CD26 APC (clone BA5b, Biolegend) for 15 min at 4°C. Non-specific binding of Fc-receptors was blocked by 2% polyclonal IgG (Flebogamma). CD26 surface expression was measured with CytoFLEX LX (Beckman Coulter) and data was analyzed with FlowJo software 10.0.08. Gating strategies are shown in the Supplementary Information.
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2

Multiparametric Flow Cytometry of CAR T Cells

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Cell-surface CAR expression was detected with two non-commercial antibodies. The allophycocyanin (APC)-labeled anti-CD19-CAR antibody has been used in prior work and binds to the Hu19 scFv.10 (link) The pacific blue-labeled anti-CD20-CAR antibody binds to the Hu20 scFv. T cells (5 × 105) were suspended in 50 μL staining buffer (0.4% bovine serum albumin, 0.1% sodium azide in PBS), and antibodies were added. T cells were also stained with the following antibodies: CD3 APC-cyanine-7 clone UCHT1 (BD Biosciences); CD4 fluorescein isothiocyanate (FITC) clone RPA-T4 (BD Biosciences); CD8 R-phycoerythrin cyanine-7 (PE-Cy7/eFluor450) clone RPA-T8 (BD Biosciences or Thermo Scientific), C-C chemokine receptor 7 PE dazzle 594, clone G043H7 (Biolegend), and CD45RA FITC clone HI100 (Biolegend).
Flow cytometry was performed with a LSRFortessa (BD) or FACSymphony A5 (BD) cytometers. Dead cells were excluded with 7-amino-actinomycin D (7-aad; BD Biosciences). The gating strategy is shown in Figure S16. Flow cytometry analysis for all experiments was performed with FlowJo (Tree Star, Inc.).
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