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3 protocols using cd140a

1

Multimarker Immunophenotyping of SVF Cells

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Cells from the SVF at passage 3 were immunophenotyped by flow cytometry using cell surface markers CD14, CD34, CD45, CD73, HLA-DR (BD Pharmigen, EEUU), CD29, CD31, CD44, CD49D, CD19, CD90, CD105, CD106, CD133, CD144, CD146, (eBioscience), CD140A, CD140B, CD166 (RD Systems, EEUU). The clone, fluorochrome and amount of each antibody are provided in S1 Table. Briefly, 106cells/ml were resuspended in blocking buffer solution containing PBS supplemented with 3.0% BSA, and incubated on ice for 10 minutes. Then, they were gated according to their granularity (SS) and size (FS). 1x105 cells were stained using the antibodies (0.25 μg x 106 cells in 100 μl PBS) against the above surface markers or the isotype-matched control antibody. Samples were analyzed on a FACScan CyAnTM High-speed ADP Analyzer (Beckman Coulter, CA. EEUU). Data acquisition and analysis were performed using SUMMIT 3 software (Beckman Coulter). Unstained cells were used to establish flow cytometer settings. Debris and cells/particles with auto-fluorescence were removed by using a threshold on the forward scatter. The original (RAW) set of data is shown in S1 Fig.
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2

Multiparametric Characterization of MSCs

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A four-color FC analysis was performed on FC500 analyzer (Beckman Coulter) to characterize MSCs and S-MSCs at day 28: FITC-conjugated CD105 (endoglin), CD31 (PECAM1) antibodies and PE-conjugated CD90 (Thy-1), CD140a (Platelet-derived growth factor receptor alpha, PDGF RA), CD140b (Platelet-derived growth factor receptor beta, PDGF RB), CD144 (Ve-Cadherin, CDH5), VEGF R1 (Vascular endothelial growth factor receptor 1, FLT1) antibodies and PE-Cy5-conjugated HLA-DR (human leukocyte antigen-D related), CD34, CD45, CD11b (integrin alpha M), CD146 (Melanoma adhesion molecule, MCAM), CD184 (CXCR4), CD106 (VCAM1) antibodies and PE-Cy7 conjugated CD73 (5′ nucleotidase) and VEGF R2 (KDR, CD309) antibodies. Mouse anti-Human CD105, CD90, CD73, HLA-DR, CD140a, CD31, CD184, CD106 were obtained from BD Biosciences (Le Pont de Claix, France), CD34, CD45, CD11b, CD146, VEGFR2 from Beckman Coulter, CD140a, VEGFR1 from R&D Systems Inc (Minneapolis, USA) and CD144 from Santa-Cruz Biotechnology inc SCBT (Dallas, USA). The isotype-matched mouse IgG1-FITC, IgG1-PE, IgG1-PCy5 and IgG1-PCy7 were used as negative controls. Acquisition and processing data from 7,000 events were analysed using Kaluza software.
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3

Immunoblotting for Adipogenic Markers

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For immunoblotting, 25–50μg of protein was loaded onto a 10% TGX gel (Bio-Rad) and separated at 200 volts for ~30 to 40 minutes. Protein was transferred to a PVDF membrane using Bio-Rad Trans-blot Turbo (1.5amps, 15 volts for 30 minutes). Membranes were blocked using 5% w/v non-milk dissolved in PBS with 0.1% tween-20 (PBS-T) for 30 minutes and incubated with primary antibody overnight at 4°C. Primary antibodies and dilutions used were as follows: from Cell Signaling Technologies - ACTB 1:5000 (#4970S), C/EBPα 1:750 (#8178S), FASN 1:1000 (#3180S), PLIN1 1:4000 (#9349S), PPARG 1:500 (#2443S), TUBA1B 1:2500 (#2125S); from Santa Cruz Biotechnology - CD73 1:1000 (#sc-398260), CD140A 1:1000 (#sc-398206), Rab5 1:750 (#sc130010), Rab27a 1:1000 (#sc136996); from R&D Systems - UCP1 1:750 (#MAB6158-SP); and from Abcam - FABP4 1:2500 (#ab92501), PGC1A 1:2000 (#ab54481). The next day, the membranes were washed 3× for 15 minutes each in PBS-T and incubated in HRP-conjugated secondary antibody from Cell Signaling Technology (#7074S and #7076S) diluted 1:4000 in PBT-T supplemented with 5% w/v milk for 1h. Membranes were washed 3× for 15 minutes each and developed using Immobilon forte chemiluminescent reagent (Millipore cat #WBLUF0100). Signal was detected using HyBlotCL ® autoradiography films (Denville #E3212–1001371) in a dark room and developed on a Konica developer (SRX-101A).
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