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Facsaria flow cytometer

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The BD FACSAria flow cytometer is a high-performance cell sorting instrument designed for advanced research applications. It utilizes fluorescence-activated cell sorting technology to accurately identify and separate individual cells from complex samples based on their unique physical and biochemical characteristics.

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761 protocols using facsaria flow cytometer

1

Cellular Redox and Mitochondrial Membrane Potential Assessment with ZnO Nanoparticles

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The cellular redox state was measured by oxidation of 2′,7′-dichlorodihydrofluorescein diacetate (H2DCFDA) into 2,7-dichlorodihydrofluorescein (DCF) which is a redox indicator probe [48 (link)]. H9c2 cells (200 × 103) were cultured with ZnO NPs (5, 10, 20 μg/cm2) for 1, 3, and 6 h in 56-mm glass Petri dishes. After treatment, cells were trypsinized and incubated with H2DCFDA (10 μM) for 30 min, and they were washed twice with PBS. Fluorescence was quantified in a FACSAria flow cytometer (Becton-Dickinson, CA, USA).
Oxidative stress was also tested through ΔΨm changes based on the fluorescent dye rhodamine 123 (Rh123). For this, cell suspensions (1 × 106) were treated with ZnO NPs (5, 10, 20 μg/cm2) for 1 h. Then, cells were washed with PBS and incubated with Rh123 (5 μg/mL) for 15 min. After incubation, cells were washed with PBS and analyzed in a FACSAria flow cytometer (Becton-Dickinson, CA, USA). Data was processed using FlowJo 8.7 software (Stanford University).
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2

Annexin V-FITC Apoptosis Assay for Cell Lines

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The most effective antiproliferative agents
in this series (4f, 4h, 4i, 4k, and 4l) were incubated for 24 h at IC50 concentrations on A549 and L929 cells. Phosphatidylserine
externalization, a marker of early apoptosis, was assessed using the
FITC Annexin V apoptosis detection kit (BD Pharmingen, San Jose, CA,
USA) on a BD FACSAria flow cytometer. Following their collection,
the A549 and L929 cells were twice washed in ice-cold PBS before being
resuspended in 100 μL of binding buffer. The cells were treated
with a volume of 5 μL (5 μg/mL) of Annexin V-FITC and
PI, and they were incubated for 15 min at room temperature (20–25
°C) in the dark. Following that, 400 μL of binding buffer
was added to the combination samples, and FACSDiva version 6.1.1 was
used to analyze the samples on a BD FACSAria flow cytometer.
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3

Isolation and Co-culture of Immune Cells

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Human cells were acquired from patients with ESCC for FACS. CD45+CD3+CD4+ T cells and CD45+CD3+CD8+ T cells were sorted on a BD FACsAria flow cytometer based on CD45, CD3, CD4, and CD8 surface expression phenotypes. CD45+CD19+CD55+ B cells and CD45+CD19+CD55 B cells were sorted on the BD FACsAria flow cytometer based on CD45+, CD19+, and CD55+/− surface expression phenotypes. Purified B-cell (2 × 104 cells/well) and T-cell (2 × 105 cells/well) subsets from the same patient were plated in a 48-well U-bottom plate and co-cultured for 48 h with anti-CD3 (2 mg/mL), anti-CD28 (10 mg/mL), interleukin (IL)-2 (0.2 mg/mL), anti-IgM (2 mg/mL), and lipopolysaccharide (10 mg/mL). Flow cytometry was used to analyse the composition of T cells.
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4

Enrichment and Sorting of CD45+ Semen Cells

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Seminal cells were separated from seminal plasma immediately after collection by centrifugation for 15 min at 775 x g, resuspended in 1 ml cold PBS supplemented with 10% FCS and 2 mM EDTA, and kept on ice for no more than 1 h. Cells were then centrifuged for 10 min at 1500 x g, filtered through a 70-µM sieve, and washed with 5 ml cold PBS supplemented with 10% FCS and 2 mM EDTA.
CD45+ semen cells from animals #BA865F, #1103075, #CA147F, and #MF1414 were enriched using CD45 magnetic beads and cell sorting with a BD FACS Aria Flow Cytometer. Total semen cells were incubated for 15 min at 4 °C with 20 μl anti-CD45 magnetic beads (Miltenyi Biotec) and washed once with 2 ml cold PBS supplemented with 0.5% BSA and 2 mM EDTA (sorting buffer). The CD45+ cell fraction was then enriched by magnetic-bead sorting, using LS columns (Miltenyi Biotec), according to the manufacturer's instructions. Cells were eluted in 4 ml sorting buffer. Following the magnetic bead-based enrichment process, cells were stained with amine-reactive blue dye (Life Technologies) to identify the dead cells, and anti-CD45 (clone D058-1283, BD Pharmingen). Cells were washed twice and stored at 4 °C in PBS/10% FCS. CD45+ cells were then sorted by simultaneous four-way sorting on a FACS Aria flow cytometer (BD Biosciences). The enriched cell fraction was used in the neutralization assay.
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5

Measuring Apoptosis by Annexin V Staining

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After the cells were incubated with the most potent antiproliferative agents in this series at IC50 concentrations, phosphatidylserine externalization, which indicates early apoptosis, was measured by the FITC Annexin V apoptosis detection kit (BD Pharmingen, San Jose, CA, USA) on a BD FACSAria flow cytometer for 24 h. Annexin V staining protocol was applied according to the manufacturer’s instructions (BD Pharmingen, San Jose, CA, USA). The cells were then briefly washed with cold phosphate buffer saline (PBS) and suspended in a binding buffer at a concentration of 1 × 106 cells/mL. Then, 100 µL of this solution containing 1 × 105 cells was transferred to a 5 mL test tube. After 5 µL of Annexin V and PI was added, the cells were incubated for 15 min at room temperature in the dark. Then 400 µL of 1× binding buffer was added to each tube and the cells were processed for data acquisition, and analyzed on a BD FACSAria flow cytometer using FACSDiva version 6.1.1 software (BD Biosciences, San Jose, CA, USA).
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6

Regulatory T Cell Suppression Assay

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Tresp (CD4+CD25-) and Tregs (CD4+CD25+CD127 dim ) from PBMCs were cultured at a 1:2 Treg to Tresp ratio. Cell cultures were incubate with isotype control antibody or CD152(CTLA-4)-F(ab')2 (10μg /ml) plus PPD (25μg /ml). After three days of incubation in RPMI medium supplemented with 10% (vol/vol) FBS, cells were stained with antibodies and analyzed by BD FACS Aria flow cytometer, and harvested with TRIZol for real-time PCR detection as described above. For the CFSE-labeled T (which was not certified by peer review) is the author/funder. All rights reserved. No reuse allowed without permission.
The copyright holder for this preprint this version posted May 13, 2020. ; https://doi.org/10.1101/2020.05.11.089946 doi: bioRxiv preprint 7 lymphocyte proliferation inhibition assay, cells were incubated for 7 days and at 3 rd day plus IL-2, and at the 7 th day, cells were collected and stained with antibodies and analyzed by BD FACS Aria flow cytometer.
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7

Quantification of Cell Surface Sialic Acids

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A549 cells were transfected with FFAR2 siRNA or scrambled siRNA (30 nM). After 48 h, the cells were trypsinized, fixed with 4% PFA for 20 min, and then stained with an Alexa Fluor 488 conjugate of wheat germ agglutinin (WGA) (Invitrogen), a commonly used agent for the detection of sialic acids (SAs) on the cell surface. After two washes with PBS, the cell suspensions were subjected to flow cytometry on a FACSAria flow cytometer (BD Biosciences, Franklin Lakes, NJ). In a separate experiment, A549 cells treated with siRNA and fixed with PFA were stained with biotinylated Maackia amurensis lectin (MAL) (α-2,3-SA) or Sambucus nigra lectin (SNA) (α-2,6-SA) (Vector Laboratories, Burlingame, CA). The bound biotinylated lectins were captured by streptavidin conjugated with Cy-5 (Life Technologies). After three washes, the cell suspensions were subjected to flow cytometry on a FACSAria flow cytometer (BD Biosciences). A549 cells pretreated with neuraminidase (Sigma-Aldrich) at 37°C for 2 h were stained with WGA, MAL, or SNA and used as negative controls. The data were analyzed by using FlowJo software (FlowJo, Ashland, OR).
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8

Apoptosis and Cell Cycle Analysis

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HFLS-RA cells were transfected and harvested after 48 h, and processed as per the PE Annexin V Apoptosis Detection Kit (BD, USA). Briefly, 5 μl of the PE reagent and 5 μl of 7-AAD reagent were added into the cell suspensions and incubated for 15 min at room temperature. Finally, we analyzed the cells in different phases using the FACSAria flow cytometer (BD).
HFLS-RA cells were harvested 48 h after transfection and fixed with 75% ethanol at −20°C for at least 2 h. Subsequently, cells were resuspended in the PI reagent (BD). Finally, we analyzed the cells in different phases using the FACSAria flow cytometer (BD).
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9

Cell Apoptosis and Cell Cycle Analysis

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Cells (2 × 105 cells/well) were seeded into 6-well plates and cultured for 24 h. The compounds (NC, GSK343, DZNep, gefitinib, G + g, and D + g) were added at various indicated concentrations for 48 h. For the cell apoptosis assay, cells were stained using the Annexin V-FITC Apoptosis Analysis Kit (BD Biosciences, San Jose, CA, USA) and were analyzed using the FACSAria™ flow cytometer (BD Biosciences). For the cell cycle assay, cells were trypsinized and fixed with 70% ice-cold ethanol overnight. Subsequently, cells were treated with DNase-free ribonuclease (TaKaRa, Beijing, China), stained with propidium iodide (PI; BD Biosciences), and analyzed using the FACSAria™ flow cytometer (BD Biosciences) equipped with ModFit LT (Topsham, ME, USA).
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10

Cell Cycle and Apoptosis Analysis of Drug Treatments

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Following treatment with different drugs for 24 h, the cells were harvested and fixed in 70% ice-cold ethanol at 4°C for 30 min. After washing with PBS, the cells were incubated with propidium iodide staining buffer (BD Pharmingen, San Diego, CA, USA) for 15 min and analyzed by FACSAria flow cytometer. The experiment was performed in triplicate.
For apoptosis analysis, the cells were treated for 24 h with XAV939 (8 μmol/l), 5-FU (50 μmol/l), XAV939 (8 μmol/l) + 5-FU (50 μmol/l), DDP (8 μmol/l) and XAV939 (8 μmol/l) + DDP (8 μmol/l), separately. The cells were measured using FACSAria flow cytometer (BD Biosciences, USA), and Annexin V (+) cells were counted for apoptotic cells after Annexin V-fluorescein isothiocyanate/propidium iodide (FITC/PI) (BD Pharmingen) double staining. The experiment was performed in triplicate.
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