Cd56 pe cy5

For cell phenotype analysis, monoclonal antibodies were directly added to 100 μL aliquots of heparinized whole blood and incubated at room temperature for 15 min. The antibodies used were: CD3 PECy7, CD14 APC, CD56 PE-Cy5 and CD19 PerCp (Biolegend, San Diego, CA, USA), CD4 Viogreen (Miltenyi Biotec GmBh, Bergisch Gladbach, Germany), CD39 Fitc, CD73 PE, CD25 BV421 and CD127 AlexaFluor 647 (BD Biosciences, San Jose, CA, USA). Red blood cells were lysed and white cells were fixed using BD FACS lysing solution (BD Bioscience). Negative populations were determined using respective anti-human isotype controls. Samples were acquired using a MACSQuant Analyzer 10 flow cytometer (Miltenyi Biotec GmBh) and the data were analyzed using FlowJo software v. 10.0 (TreeStar Inc., Ashland, OR, USA).
We compared the frequencies of four subsets based on CD39 and CD73 expression (CD39⁻CD73⁺, CD39⁺CD73⁺, CD39⁺CD73⁻, and CD39⁻CD73⁻) within each studied population (B cells as CD3⁻CD19⁺, CD4⁺ T cells as CD3⁺CD4⁺, CD8⁺ T cells as CD3⁺CD4⁻, NK cells as CD3⁻CD4⁻CD19⁻CD56⁺, Tregs as CD3⁺CD4⁺CD25⁺⁺CD127⁻, and monocytes as CD14⁺). The percentage of these four subsets was related to their corresponding precursor populations (CD4⁺ T, CD8⁺ T, B, NK, and monocytes). In the case of Treg, the percentage was related to CD4⁺ T cells.

MNCs were stained with labeled antibodies, CD3 ECD (Biolegend), CD45 Krome Orange (R&D systems), CD56 PE-Cy5 (Biolegend), CD16 APC-Cy7 (Biologend), CD326 PerCPCy5.5 (Biolegend). Phenotypic analysis was performed using DNAM-1 FITC (Becton Dickinson), 2B4 FITC (Biolegend), NKG2A APC (Beckman Coulter), NKG2D APC (Biolegend), NKp30 PE (Biolegend) and NKp46 PE(Biolegend), isotype controls for IgG1 and IgG2a, (all Biolegend). Dead cells were stained with 1:1000 diluted sytox blue (Life Technologies; Invitrogen). Flow cytometry analysis was performed on a Gallios flow cytometer from Beckman Coulter. Analysis was done in Kaluza 1.5 (Beckman Coulter). Gating strategy is shown in Supplementary Figure 1.