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15 protocols using fc500 analyzer

1

Cell Cycle Analysis by Flow Cytometry

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Cells were seeded at 350 000 cells per well onto 6-well plates, treated the next day with the compounds as indicated. At each time point, media was then collected from each individual well and cells were trypsinized for 3 min in the tissue culture incubator. Upon centrifugation at 1000 r.p.m. for 5 min, cell pellet was fixed in ice cold 70% ethanol and stored at 4 °C for at least 24 h. On the day of analysis, the fixed cells were treated with RNase A (Invitrogen, Grand Island, NY, USA), stained with Propidium Iodide (PI) (Invitrogen), and analyzed on a Beckman Coulter FC500 Analyzer (Beckman Coulter) using CXP analysis software (BD Biosciences, San Jose, CA, USA). All experiments were performed at least twice independently.
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2

Evaluating Transfection Efficiency via Flow Cytometry

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The transfection efficiency was evaluated 48 hr post-transfection via flow cytometric analysis using a Beckman Coulter FC500 analyzer (Beckman Coulter). GFP (expressed from Cas9/sgRNA and minicircle vector, respectively) and mRuby (expressed from HDR DP) expressing cells were analyzed using the Kaluza Flow Cytometry Analysis Software (Beckman Coulter). Single-cell sorting was performed on a BD FACSAria III (BD Biosciences) upon excitation with a 488 nm wavelength solid-state laser detecting GFP-positive cells. Data analysis was performed using BD FACSDiva software version 8.0.4 (BD Biosciences).
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3

Quantifying LGR5 Expression in Transfected Cells

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The expression of LGR5 in transfected A549/H1299 cells was measured using the rat anti-human LGR5 antibody (Miltenyi Biotec, Germany) according to the manufacturer’s instructions. The cells were suspended at a density of 1×106 cells/mL in Hank’s balanced salt solution (HBSS) with 1% FCS, incubated with the antibody (10 µL) for 30 min, and then washed once by HBSS with 1% FCS. Flow cytometry was performed on an FC 500 analyzer (Beckman Coulter). Data were analyzed by FlowJo (San Carlos, CA, USA).
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4

Cell Cycle Analysis of HCC Cells

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Control, RU-A1- and C-209-treated HCC cells (1 × 106) were fixed by adding cold 75% ethanol drop by drop with constant agitation. Samples were stored in ethanol overnight at −20 °C. The following day, the alcohol was washed off with PBS and 500 μl of PI/RNase staining buffer (BD Biosciences, #550825) was added to each sample before analysis through a Beckman Coulter FC500 Analyzer.
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5

Cytotoxicity and Activation Assay

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HeLa or 3T3 cells were plated in triplicated in 96-well microtiter plates at 4 × 104/well one day before the assay. Human peripheral blood mononuclear cells (PBMCs), isolated from the buffy coat fraction of healthy volunteers' peripheral blood by density-gradient centrifugation, or Jurkat E6–1 cells were added in 5:1 effector:target (E:T) ratio on HeLaor 3T3 cells in the presence of purified EgA1 LiTE or EgA1 ATTACK antibodies. After 24 hours aliquots of the culture supernatants were harvested and the levels of IL-2 were measured by using a commercially available ELISA test kit (Diaclone, Besançon, France). Determination of CD69 expression was performed after 24 hours incubation using PE-conjugated anti-CD69 mAb (clone FN50, BD Biosciences, San José, CA, USA) and FITC-conjugated anti-CD3 mAb (clone UCHT1, Abcam) by flow cytometry as described.4 (link) The samples were analyzed with a Beckman-Coulter FC-500 Analyzer.
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6

Cell cycle analysis of SUM159 and MDA-MB-231

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SUM159 and MDA-MB-231 cells were incubated with vehicle control or CDDO-Im (10, 100 and 200 nM) for 24 h. The cells were then harvested by trypsinization and fixed in ice-cold 70% ethanol for 30 min. The ethanol-fixed cells were incubated with Ribonuclease A solution (1 µg/ml) and PI (1 mg/ml) for 30 min in the dark at room temperature and analyzed by FC500 Analyzer (Beckman Coulter, Brea, CA).
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7

Flow Cytometry Analysis of MCF10DCIS Cell Subpopulations

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The detailed procedure was reported previously [24 (link)]. MCF10DCIS cells isolated from mammospheres were stained with antibodies against CD44-APC, Clone G44–26 from BD Biosciences (Cat# 559942, RRID: AB_398683) and CD10-PE from Thermo Fisher Scientific (Cat# 12–0106-41, RRID: AB_10714985). The stained MCF10DCIS cells were analyzed by flow cytometry using an FC500 Analyzer (Beckman Coulter) to determine the percentage of 4 different CD44/CD10+, CD44+/CD10+, CD44/CD10 and CD44+/CD10subpopulations.
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8

CDDO-Im Induces Apoptosis in SUM159 Cells

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SUM159 cells were incubated with vehicle control or CDDO-Im (10, 50, 100, 150 or 200 nM) for 24 h. Cells were harvested by trypsinization, and the dead cells in culture medium were also collected by centrifugation. The collected cells were stained with Annexin V and PI using the FITC Annexin V Apoptosis Detection Kit II (BD Pharmigen, San Jose, CA), following the manufacturer’s instruction. The stained cells were analyzed by FC500 Analyzer (Beckman Coulter).
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9

Apoptosis Detection in HCC Cells

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Control, RU-A1-, C-209-, and camptothecin-treated HCC cells (1 × 106) were washed and stained with Annexin VFITC Early Apoptosis Detection kit (Cell Signaling, #6592) according to the manufacturer’s instructions before analysis on a Beckman Coulter FC500 Analyzer.
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10

Flow Cytometric Analysis of Lymphocyte Subsets

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Cells (1×106 cells/ml) were washed twice with Stain Buffer (BD Pharmingen) and resuspended in 50 µl Stain Buffer (BD Pharmingen) containing surface markers PE Cy7-anti-CD4 (BD Pharmingen), PC5.5-anti-CD8 (Beckman Coulter, Brea, CA), or appropriate isotype control was added. After 30 min on ice, cells were washed twice with Stain Buffer. These cells were then stained with Acridine orange, Cyto-ID Green, TUNEL, or Annexin-V staining (as below) and analyzed by flow cytometry (Beckman-Coulter FC-500 Analyzer) using Beckman-Coulter Kaluza software. CD4+ and CD8+ cells were determined after gating on a population of lymphocytes in which 3×104 to 5×104 cells per sample were counted and processed for Acridine orange, Cyto-ID Green, TUNEL, or Annexin-V assays.
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