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7 protocols using symphony s6

1

ITGB1 KO Cell Sorting and Immune Profiling

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To analyze and sort out ITGB1 KO cells, infected cells were first filtered through a cell strainer cap (35-μm mesh) to obtain a single cell suspension (approximately 1×106 cells/mL for analysis and 1×107 cells/mL for sorting), which was then labeled with APC-conjugated anti-human ITGB1 antibody (#10587-MM05-A, Sino Biological, China) by incubating for 30 min in the dark at room temperature.
To detect any changes in immune cell profile in mouse blood, 50μL of whole blood was mixed with 0.5μL of each of CD45-PerCP/Cyanine5.5, CD3-FITC, and CD8-AF700 antibodies (Biolegend, USA), and incubated for 30min at room temperature, followed by incubation with 500μL of red blood cell (RBC) lysis solution for 5min at room temperature.
Antibody-labeled cells were then sorted on a fluorescence-activated cell sorter (FACS) SymphonyS6 (BD Biosciences, USA) and analyzed using FACSDiva software (BD Biosciences, USA). Flow cytometry (FCM) was carried out on a NovoSampler Pro or a NovoSampler Q (ACEA Biosciences, USA) system, and data were analyzed using the NovoExpress v1.4.1 software (ACEA Biosciences, USA).
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2

Isolation and Organoid Culture of Endometrial Epithelial Subsets

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Fluorescence Activated Cell Sorting (FACS) was performed to isolate MUC5B+ and MUC5B epithelial cells from endometrium dissociated tissue (Extended Data Figure 10). Briefly, control eutopic tissue was dissociated as described above. Cells were then stained with PI and with antibodies marking immune cells (CD45+), endothelial cells (CD31+), epithelial cells (EpCAM+), and MUC5B (Supplementary Table 10). We sorted both MUC5B+ and MUC5B epithelial cells (BD Bioscience Symphony S6), gated using FACS Diva (9.0.1), and plated 2000 cells of each population in Matrigel domes (Corning, #356231). Growth of organoid was monitored every 4 hours using an Incuycte S5 (Sartorius) live microscope on brightfield imaging for 10 days. Organoid area and counts were analyzed directly in the onboard Incucyte software (Source Data ED9) and a paired t-test was performed with GraphPad PRISM8 for each timepoint.
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3

Multiparametric Flow Cytometry Staining

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For staining of cell surface molecules, cells were suspended in staining buffer (PBS, 1% bovine serum albumin (BSA), and 0.01% NaN 3 ) and first stained with using PE-or APCconjugated MR1 tetramers at a dilution of 1:300 in staining buffer for 45 minutes at room temperature followed by surface staining with fluorochrome-conjugated antibody at 0.1-1 μg/10 7 cells. Cells were stained with Live/Dead Yellow (ThermoFisher) at 1:500 and Fc receptors were blocked with 2.4G2 antibody at 1:500 and Free Streptavidin at 1:1000 for 15 min at 4˚C. After washing, cells were stained with cell surface-specific antibodies for 30 minutes on ice. For cytokine staining, cells were previously stimulated with 100 ng/ml of PMA and 1 μg/ml of Ionomycin for 1h at 37˚C and then incubated in GolgiStop and GolgiPlug (both from BD PharMingen) for 2 h at 37˚C. For intracellular staining, cells were fixed with CytoFix (BD) for 20 min, and permeabilized with Perm 1X solution (ThermoFisher) with intracellular antibodies overnight. For high-parameter flow cytometry experiments, data were acquired on Fortessa or Symphony S6 (BD Biosciences), data were processed with DIVA (BD Bioscience) and analyzed with FlowJo v10.7 (BD). Opt-tSNE and UMAP dimensional reduction as well as FlowSOM algorithm clustering of flow cytometry data was performed in OMIQ software (OMIQ Inc.).
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4

Multiparameter Flow Cytometry Analysis

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Cells were pre-incubated with 2.4G2 antibody (Bioceros) to block Fc receptors and stained with appropriate antibodies at 4°C in the dark for 30-45 minutes. Cell viability was assessed using Fixable Viability dyes (eFluor780 or eFluor506; Thermo Fischer) and cell suspensions were analyzed with a BD FACSymphony or purified using a BD Symphony S6, BD FACSAria II or III. Nuclei were sorted on basis of DAPI positivity and size. Analysis was performed with FlowJo software (BD). Intracellular staining for CD207 was performed by fixing and permeabilizing extracellularly stained cells according to the manufacturer’s instructions using the FoxP3 Fixation/Permeabilization Kit (Thermo Fischer).
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5

CRISPR-Mediated FBXW7 Knockout in MCF10A Cells

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Edit‐R gene editing methods (Horizon, Waterbeach, UK) were used to engineer MCF10A FBXW7 mutant cells. In brief, cells were seeded at a density of 1 × 106 cells per well in a 6‐well plate, along with 40 μm Edit‐R Cas9 nuclease protein NLS (Horizon), 20 μm crRNA, 10 μm tracrRNA and Lipofectamine™ CRISPRMAX transfection reagent (Cat #CMAX00003, Thermo Fisher Scientific, Waltham, MA, USA). The transfection was performed as per the manufacturer's instructions. A set of 3 crRNA (SQ‐004264‐01‐0002, Horizon) to target FBXW7 was utilised. 96 h following transfection, cells were seeded in antibiotic‐free media at a density of one cell per well into 96‐well plates, using a FACS sorter (BD Symphony S6, Franklin Lakes, NJ, USA). To assess for successful gene targeting events, genomic DNA surrounding the guide target site was amplified using forward 5′‐AGGGCCCAAATTCACCAATA‐3′ and reverse 5′‐TAACTGGAGGCGAGGAGAAC‐3′ primers. PCR products were subsequently cloned into pCR‐TOPO‐blunt (Cat #450245, Thermo Fisher Scientific) afterwhich Sanger sequencing of the inserts was performed.
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6

Investigating FABP5 Expression in RSL3-Treated Cells

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Cells were treated with 200 nM RSL3 for 0, 1, 3, 5 and 7 h. After treatment, the cells were harvested and washed once with MACS buffer (D-PBS + 2 mM EDTA + 0.5% BSA) before stained with live-dead staining kit for 15 min (Invitrogen). After live-dead staining, the cells were washed once with MACS buffer, incubated with primary FABP5 antibody (Thermo Fisher Scientific) for 30 min, followed by two times MACS buffer washes and further incubation with the secondary antibody for 30 min at room temperature (Biolegend). After washing with MACS buffer two times, the cells were analyzed by flow cytometry (BD Symphony S6).
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7

Flow Cytometry-based Immune Cell Phenotyping

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Cells were pre-incubated with 2.4G2 antibody (Bioceros) to block Fc receptors and stained with appropriate antibodies at 4°C in the dark for 30-45 minutes. Cell viability was assessed using Fixable Viability dyes (eFluor780 or eFluor506; Thermo Fischer) and cell suspensions were analyzed with a BD FACSymphony or purified using a BD Symphony S6, BD FACSAria II or III.
Nuclei were sorted on basis of DAPI positivity and size. Analysis was performed with FlowJo software (BD). Intracellular staining for CD207 was performed by fixing and permeabilizing extracellularly stained cells according to the manufacturer's instructions using the FoxP3 Fixation/Permeabilization Kit (Thermo Fischer).
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