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4 protocols using cd90 phycoerythrin pe

1

Immunophenotyping of Cell Populations

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Fluorescence activated cell sorting (FACS) was carried out as described previously in our paper [20 (link)]. The following antibodies were used to mark the cell surface epitopes: CD90-phycoerythrin (PE), CD44-PE, CD73-PE, CD166-PE and CD34-PE, CD45-fluoroisothyocyanate (FITC), and HLA-DR-FITC (all from BD Pharmingen). All analyses were standardized against negative control cells incubated with isotype specific IgG1-PE and IgG1-FITC (BD Pharmingen). At least 10,000 events were acquired on Guava Technologies flow cytometer, and the results were analyzed using Cytosoft, Version 5.2 (Guava Technologies).
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2

Apoptosis Measurement in AML Cells

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Viable cell counts were determined by flow cytometry using CountBright absolute counting beads (Life Technologies) on annexin V-negative/7-amino-actinomycin D (7AAD)-negative cell events. Apoptosis was assessed by flow cytometry of phosphatidyl serine externalization (Martin, et al 1995 (link)) with annexin V-cyanin 5 (Cy5) (BD Biosciences) using a FACSArray Bioanalyser (BD Biosciences). Cell membrane integrity was simultaneously assessed by 7AAD exclusion in the annexin V-stained cells. For AML cells co-cultured with MSCs, unattached AML cells were obtained by combining cells in suspension and cells collected after washing the wells twice with phosphate-buffered saline. Adherent cells were obtained by trypsinization. The unattached and adherent cells were combined and stained with CD45-APCH7, CD90-phycoerythrin (PE), and annexin V-Cy5 antibodies (all from BD Biosciences). Apoptosis in AML cells was determined by annexin V-Cy5 positivity in CD45+CD90 cells.
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Immunophenotyping of Deciduous DPSCs

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Immunophenotyping of deciduous DPSCs were examined using flow cytometry at passage 5 [22 (link)]. The antibodies used to mark the cell surface epitopes were CD90-phycoerythrin (PE), CD73-PE, CD166-PE and CD34-PE, CD45-fluoroisothiocyanate (FITC), and HLA-DR-FITC (all from BD Pharmingen, San Jose, CA, USA). All analyses were standardized against negative control cells incubated with isotype-specific immunoglobulin (Ig) G1-PE and IgG1-FITC (BD Pharmingen). At least 10,000 events were acquired on a Guava Technologies flow cytometer, and the results were analysed using Cytosoft, Version 5.2 (Guava Technologies, Hayward, CA, USA).
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4

MSC Surface Marker Expression Analysis

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MSCs were cultivated at a cell density of 1.0 × 105 cell/mL under standard cultivation conditions as described above. After 48 h of incubation, they were washed with warm PBS and trypsinized, and the cells were pelleted by centrifugation at 1200 rpm for 10 min. The cells were fixed in warm 4% paraformaldehyde (PFA), washed with PBS and stained with fluorescence-labeled antibodies (Abs) with incubation at 4 °C for 30 min. The used antibodies were specific for CD44 directly conjugated with fluorescein isothiocyanate (FITC) (1:100, Mouse, BD Pharmingen, USA), CD73- allophycocyanin (APC) (1:100, mouse, BioLegend, USA) and CD90- phycoerythrin (PE) (1:100, Mouse, BD Pharmingen, USA). Labeled cells were analyzed using a Fluorescence-activated cell sorting (FACS) instrument, and the results were depicted in histogram graphics.
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