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2 protocols using buv 395cd4

1

Comprehensive Cytometric Analysis of CAR T Cells

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All antibodies were titrated. CAR expression was measured with Alexa-Fluor-647–conjugated goat anti-mouse Fab (Jackson ImmunoResearch cat#115-607-003, RRID: AB_2338931). The following antibodies were used: CD19–PE (clone SJ25C1 BD Biosciences cat# 340364, RRID: 400018) or CD19–BUV395 (clone SJ25C1, BD Biosciences cat# 563551, RRID: AB_2738272), CD19–BV510 (clone SJ25C1, Biolegend cat#363020, RRID: AB_2564229), CD3–BUV737 (clone UCHT, BD Biosciences cat# 612750, RRID: RRID:AB_2870081), BUV-395CD4 (BD Biosciences cat# 563552, RRID:AB_2738273), and APC-cy7-CD8 (BD Biosciences cat# 557834, RRID:AB_396892). CountBright beads (Invitrogen cat# C36950) were used to determine the absolute number of cells according to the manufacturer’s protocol. 7-AAD or DAPI was used to exclude dead cells. Fc Receptor–Binding Inhibitor Antibody Human (eBioscience cat# 14-9161-73, RRID: AB_468582) was used to block Fc receptors. In vitro viability after RT was assessed using Zombie NIR (Biolegend cat# 423106) and Annexin V PerCP-Cy5.5 (Biolegend cat# 640936) according to the manufacturer’s protocols. Data were collected using BD LSR-II, BD LSR-Fortessa, and Cytek Northern Lights cytometers. Data were analyzed with FlowJo Software (Treestar/BD Biosciences, RRID: SCR_008520). Cell sorting was performed using a BD FACSAria cell sorter.
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2

Multiparameter Flow Cytometry Analysis

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Flow cytometry was performed as previously described [9 (link)]. The following Abs were used: BV785-CD3ε (Clone 145-2C11), BV711-CD8α (Clone 53–6.7), APC/Cy7-CD11b (Clone M1/70), BV-421-Gr-1 (Clone RB6-8C5), PE/Cy7-CD11c (Clone N418), FITC-CD45 (Clone I3/2.3), PerCP/Cy5.5-IAb (Clone AF6-120.1), BV605-NK1.1 (PK136) were from Biolegend. BUV395-CD4 (Clone GK1.5) and BUV395-CD19 (Clone 1D3) were from BD Biosciences. To obtain single-cell suspensions, LNs were first incubated in Liberase TM (1.67 Wünsch units/mL) (Sigma) in PBS with 25 mM HEPES for 30 min at 37°C before adding PBS with 25 mM HEPES + 10% FBS to halt the digestion process, followed by mechanical disruption of the tissue through a 70-μm filter. Cells were washed once with FACS buffer (PBS with 1% BSA + 0.1% sodium azide) before surface staining. For analysis, samples were acquired using either a BD LSR II flow cytometer or a BD Fortessa flow cytometer (BD Biosciences), and data were analyzed with FlowJo software (TreeStar). For cell sorting, samples were acquired with a BD FACS Aria III sorter (BD Bioscience).
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