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4 protocols using anti cd45ro pecy7

1

Comprehensive CAR Expression Analysis

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For evaluation of CAR expression, cells were stained with a goat anti-mouse Fab antibody conjugated with Alexa Fluor 647 (Jackson ImmunoResearch) or biotinylated CD19-Fc (ACRO Biosystems) for 15 min at room temperature. Cells were thoroughly washed before staining with antibodies for additional surface markers. Anti-CD3-BB515 and anti-CD62L-BB515 were purchased from BD Biosciences. Anti-CD4-BV785, anti-CD8-BV711, anti-CD45RA-BV421, anti-CD45RO-PECy7, streptavidin-PE, anti-CD27-PE, anti-CD95-allophycocyanin (APC)Cy7, anti-CCR7-APC, anti-CD45-BV711, and anti-CD19-PE, anti-CD3-BV711 were purchased from BioLegend and used to stain surface antigens. Cell Trace Violet was purchased from Thermo Fisher Scientific and used at a concentration of 1 μM to label cells for 10 min. All data were acquired using a BD Fortessa flow cytometer (BD Biosciences) and analyzed using FlowJo software.
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2

Multiparametric Immune Cell Phenotyping

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Anti-HLA-A*02 APC (RRID AB 2561567, clone BB7.2), anti-CD3 PerCPCy5.5 (RRID AB 2561628, clone OKT3) and PE (RRID AB 571913, clone OKT3), anti-CD8 FITC (RRID AB 1877178, clone SK1), anti-CD137 PECy7 (RRID AB 2207741, clone 4B4-1), anti-CD45RO PECy7 (RRID AB 11203903, clone UCHL1), anti-CD45RA PerCPCy5.5 (RRID AB 893358, clone HI100), anti-CCR7 APC-Cy7 (RRID AB 10915272, clone G043H7) were bought from Biolegend (San Diego, CA, USA).
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3

CAR T Cell Phenotyping and Transcription Factor Analysis

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GPC3-CAR expression was detected using the anti-F(ab)2 Alexa Fluor® 647-conjugated antibody (Jackson ImmunoResearch) and anti-goat IgG1 isotype control (Jackson ImmunoResearch, West Grove, PA). The following antibodies were used for T cell phenotyping analyses: anti-CD4-APC/Fire 750 (BioLegend), anti-CD8-V500 (BD Biosciences, San Jose, CA), anti-CD45RO-PE/Cy7 (BioLegend), anti-CD62L-AF488 (BioLegend), anti-CD19-PerCP/Cy5.5 (CCR1; BioLegend), anti-CD3-PE (BD Biosciences), anti-CD279-PerCP/Cy5.5 (PD-1; BioLegend), anti-CD223-PE/Cy7 (LAG-3; BioLegend) and anti-CD366-BV421 (TIM-3; BD Biosciences). Anti-bovine IgG (Sigma-Aldrich, St. Louis, MO) was used to block non-specific binding of other murine antibodies following CAR staining. Flow cytometry assessment was performed on either an LSR-II (BD Biosciences) or iQue Screener PLUS (Intellicyt Corporation, Albuquerque, NM). Results were analyzed using FlowJo software (FlowJo, Ashland, OR). To detect intracellular TCF-1 expression, CAR T cells were first stained for surface expression of CAR, CD4, and CD8 using the antibodies listed above, followed by staining with anti-TCF1-PE (TCF7, BioLegend) used in conjunction with the True-Nuclear Transcription Factor Buffer Set (BioLegend) according to the manufacturer’s instructions.
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4

Detailed Phenotyping of Immune Cells

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Anti-CD14 and anti-CD19 APC-H7 (both at 1:100), anti-CD25 PECy7 (1:50), anti-CD62L V450 (1:50), anti-CD127 PECy7 (1:100), anti-CD161 FITC (1:10), anti-IFNγ V450 (1:200), anti-Ki67 FITC (1:10) were from BD Biosciences. Anti-CD3 ECD (1:100) and anti-CD8β PE (1:50) were from Beckman Coulter. Anti-Vα7.2 FITC (1:10) and PE (1:20), anti-CD45 Alexa Fluor 700 (1:400), anti-CD45RO PECy7 (1:50), anti-CCR9 Alexa Fluor 647 (1:20), anti-Ki67 Brilliant Violet 421 (1:20), anti-CCR7 Brilliant Violet 421 (1:20) were from BioLegend. Anti-CD161 PerCP-Cy5.5 (1:20), anti-IL-22 PerCP-eFluor 710 (1:50) were from eBioscience. Anti-IL-18R PE (1:20), and anti-PLZF APC (1:10) were from R&D systems. Anti-CD4 Qdot 655 (1:400), anti-CD8α Qdot 605 (1:800), anti-CD45 Qdot 705 (1:100), live/dead aqua (1:100) and near infrared fixable (1:400) cell stain were from Invitrogen. Cell surface staining was performed using directly conjugated antibodies and fixed in Cytofix/Cytoperm (BD Biosciences). Intracellular staining was performed using the appropriate mAb’s in Perm/Wash (BD Biosciences). Samples were acquired on an LSRII flow cytometer (BD Biosciences) equipped with 405, 488, 532 and 647 nm lasers. Single-stained polystyrene beads (BD Biosciences) were used for compensation purposes. Software-based compensation was performed using the compensation platform in FlowJo software version 9.5 (Tree Star).
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