Publication protocol
The first passages of ASCs were trypsinized (1% trypsin-EDTA, Sigma-Aldrich) and then centrifuged at 1,000 ×g for 5 min in the presence of 1% FBS to quench the enzyme. The cell pellets were resuspended in 1% FBS in PBS, filtered through a 70 μm cell strainer (BD Biosciences), and the cells were counted using a One Cell Counter (Wako Chemical). Twenty microliters of purified rat anti-mouse CD16/CD32 (Mouse BD Fc Block, BD Biosciences) was added to 2 × 107 cells and the mixture was incubated at 4°C for 20 min. Cells were separated into 100 μL fractions at a concentration of 1 × 107 cells/mL and then incubated at 4°C with 0.5 μg anti-CD90/Thy1 [FITC.MRC OX-7] (FITC) per 1,000,000 cells (ab226; Abcam, UK) and/or 10 μL anti-CD105 antibody [MJ7/18] (phycoerythrin; ab93567, Abcam) per 1,000,000 cells for 40 min. Antibody conjugated cells were subsequently filtered again through a 35 μm cell strainer (BD Biosciences). Cells were incubated with 5 μL 7-AAD staining solution (BD Biosciences) per 106 cells for 10 min and then sorted according to the expression of the cell surface markers CD90 and/or CD105 using fluorescence-activated cell sorting (FACS) (FACS Aria II; BD Biosciences, Japan). Cells were collected in DMEM supplemented with 1% penicillin/streptomycin and 10% FBS. ASCs were sorted into four groups: CD90(−)/CD105(−), CD90(+)/CD105(−), CD90(−)/CD105(+), and CD90(+)/CD105(+); unsorted ASCs were used as a control.
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