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Accuri c6 flow cytometer and software

Manufactured by BD
Sourced in Japan

The Accuri C6 flow cytometer is an analytical instrument designed for the detection and analysis of cells and particles in a liquid sample. It uses lasers to illuminate the sample and detectors to measure the resulting light signals, providing information about the size, granularity, and fluorescence properties of the analyzed objects. The Accuri C6 is accompanied by software that facilitates the collection, visualization, and analysis of the acquired data.

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6 protocols using accuri c6 flow cytometer and software

1

CD8+ T Cell Depletion and Antigen Stimulation

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Peripheral blood mononuclear cells (PBMCs) were isolated from up to 300 ml whole blood donations using Lymphoprep (Stemcell Technologies) and density gradient centrifugation. CD8 T cells were depleted by positive selection using the EasySep™ Human CD8 Positive Selection Kit (Stemcell Technologies) and EasySep™ magnet (Stemcell Technologies). Depletion of CD8 T cells was confirmed by staining an aliquot of 50,000 CD8 depleted PBMC with anti-CD3-FITC (clone: OKT3), anti-CD4-PE (clone: OKT4) and anti-CD8-APC (clone: HIT8a) fluorescent antibodies and analysis with an Accuri C6 flow cytometer and software (BD Biosciences).
Antigen reactivity of CD8 T cell depleted PBMC to the peptide pools was determined where indicated by IFN-γ ELISpot assay (see below), and cells were subsequently stimulated with the various antigen peptide pools (see below) at 1 µg/ml each peptide. After 48 hours of antigen stimulation, an aliquot of ~ 50,000 CD8 depleted PBMC of each condition was stained for anti-CD4-APC (clone: OKT4) and anti-CD69-PE (clone: FN50) and analyzed using the Accuri C6 flow cytometer and software (BD Biosciences). All antibodies for flow cytometry were obtained from BioLegend.
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2

Exosome Surface Marker Characterization

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Antibodies to CD9 (HI9a), CD63 (NVG-2), CD63 (H5C6), CD81 (Eat-2), CCR9 (9B1), CXCR4 (L276F12), and CX3CR1 (SA011F11) were purchased from BioLegend (San Diego, CA). Isotype controls including Rat IgG2a, Rat IgG2b, Armenian Hamster IgG, Mouse IgG2a, and Mouse IgG1 were also from BioLegend. The antibody to CD9 (KMC8) was obtained from BD Biosciences. The antibodies to CCR7 (4B12), CCR10 (248918) were acquired from R&D Systems. The cells or microbead-conjugated exosomes were stained with the fluorescently labeled antibodies, washed twice with PBS containing 2% FBS and 2 mM ethylenediaminetetraacetic acid (EDTA) (Wako, Osaka, Japan), and analyzed by using BD Accuri C6 flow cytometer and software (BD Biosciences). For this method of microbead conjugation of exosomes, only positive events can be detected and fluorescently quantified in the flow cytometry. In some experiments, total (intracellular plus surface) staining experiment was done by using FIX and PERM Kit (Thermo Fisher Scientific) according to manufacturer's instructions.
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3

Cytokine Profiling of CAR T Cells

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1x105 TZ47 CAR only or Super2 + IL4, IL5, IL25, IL33 or thymic stromal lymphopoietin (TSLP) T cells were co-cultured with recombinant B7H6 (Biolegend 794006) or B16F10-B7H6 tumor cells for 24 hrs at 37°C. Tumor cell lines were plated at a 1:1 and 0.5:1 Effector:Target ratio. Cell-free medium was collected and analyzed for IL4, IL5, IL25, IL33 and TSLP using ELISAs or LEGENDplex™ assays (Biolegend, 740055, 740056, 447104, 434104; Invitrogen 88-7333-22) as described in the manufacturers’ protocols using an Epoch BioTek plate reader with Gen5 1.11 2005 software or BD Accuri C6 Flow Cytometer and Software.
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4

Comprehensive Blood Cell Analysis Protocol

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For white blood cell analysis, mixed blood was collected from heart puncture into EDTA‐treated vacuum tubes (BD biosciences, Franklin Lakes, NJ). Erythrocytes were lysed in hypotonic ammonium‐chloride buffer for 10 min with gentle agitation at 4°C, and then, centrifuged at 250× g for 10 min at 4°C. The supernatant was removed, and pellet was washed twice with cold PBS. The pellet was then resuspended in PBS containing 5 mM of EDTA and 0.5% (w/v) bovine serum albumin (FACS buffer). Purified white blood cells were probed 30 min with the following antibodies: Anti‐CD45‐APC (Cell Signaling Technologies, Danvers, MA), anti‐Ly6G‐FITC (Sigma‐Aldrich, St. Louis, MO), and anti‐CD64‐PE (Thermo‐Fisher). Samples were washed twice with FACS buffer, resuspended in 300 μl of FACS buffer and analyzed immediately.
For platelet analysis, 200 µl of whole blood was collected from the inferior vena cava and added to tubes containing 40 ul of acid‐citrate‐dextrose buffer at 30°C and a portion of blood was aliquoted for counting. Blood was diluted 100x in cold FACS buffer and mixed gently. Diluted whole blood was probed with anti‐CD9‐APC (Thermo‐Fisher) for 30 min. Samples were washed twice with FACS buffer, resuspended in 300 μl of FACS buffer and analyzed immediately.
The Accuri C6 flow cytometer and software (BD Biosciences) was used for all data acquisition and analysis.
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5

Quantifying Edited Hematopoietic Stem Cells

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Between 4 and 8 days post targeting with fluorescent gene replacement vectors, CD34+ HSPCs were harvested and the percentage of edited cells was determined by flow cytometry. Cells were analyzed for viability using Ghost Dye Red 780 (Tonbo Biosciences), and reporter expression was assessed using either the Accuri C6 flow cytometer and software (v.9.4.11; BD Biosciences) or the FACS Aria II cytometer and FACS Diva software (v.8.0.3; BD Biosciences). The data were subsequently analyzed using FlowJo (v.10.6.1; FlowJo LLC).
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6

Mitochondrial Depolarization Measurement

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The percentage mitochondrial depolarisation (Δψ m ) was measured using FACS and the JC-1 Mitoscreen (BD Biosciences, San Jose, CA). Briefly, JC-1 stock solution was diluted in 1X Assay Buffer (37°C) to make up a working solution. Approximately 200,000 cells suspended in 100 μl of 0.1 M PBS from each treatment were transferred to 1.5 ml tubes containing 100 μl of JC-1 staining solution and incubated (10 min, 37°C). Thereafter, 100 μl of FACS sheath fluid was added to each sample. Flow cytometry data from stained cells (50,000 events) were captured with the Accuri™ C6 flow cytometer and software (BD Biosciences). Live cells were gated using CFlow Plus Software (BD Biosciences).
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