Journal: Scientific Reports
Article Title: PD-L1 is a critical mediator of regulatory B cells and T cells in invasive breast cancer
doi: 10.1038/srep35651
Figure Lengend Snippet: To investigate the phenotype and subsets of CD4 + T cells in patients and healthy individuals, PBMCs were isolated from peripheral blood, incubated with CD4-ECD, CD25-PE-cy7, CD127-FITC or PD-1-PE, and analyzed by flow cytometry. ( A , B ) The percentage of CD4 + CD25 + CD127 low/− T cells was among the highest in PBMCs of IBCa patients (6.06 ± 2.17%) compared with FIBma patients (2.91 ± 1.06%) and health individuals (2.28 ± 0.79%) ( P < 0.05 for all). ( C , D ) The expression of PD-1 on CD4 + CD25 + CD127 low/− Tregs in PBMCs of health individuals, FIBma and IBCa patients analyzed by flow cytometry. These was significant difference between the PBMCs of FIBma patients and health individuals ( P < 0.05). ( E ) The percentages of CD4 + T cells in PBMCs of health individuals, FIBma and IBCa patients were 19.90 ± 9.02%, 22.98 ± 7.51%, and 20.74 ± 8.84%, respectively. And there no difference was found between health individuals and FIBma patients or health individuals and IBCa patients ( P > 0.05). ( F ) The ratio of CD4 + CD25 + CD127 low/− Tregs and CD4 + T cells was highest in PBMCs of IBCa patients compared with health individuals and FIBma ( P < 0.001). ( G , H ) The expression of PD-1 compartmentalized into two distinct (PD-1 lo and PD-1 hi ) populations. The high level PD-1 hi expression was found on CD4 + CD25 + CD127 + T cells (20.00 ± 22.15%) and CD4 + CD25 − T cells (13.92 ± 10.15%), compared with CD4 + CD25 + CD127 low/− Tregs (9.57 ± 7.27%). And there was significantly difference between CD4 + CD25 + CD127 low/− Tregs and CD4 + CD25 + CD127 + effector T cells ( P < 0.05). On the other hand, there was high level PD-1 lo expression was found on CD4 + CD25 + CD127 low/− Tregs (37.17 ± 19.27%), compared with CD4 + CD25 + CD127 + effector T cells (31.03 ± 20.84%) or CD4 + CD25 − T cells (23.87 ± 19.68%) ( P > 0.05 and P < 0.05, respectively).
Article Snippet: The following monoclonal antibodies and reagents were used in this study: anti-human CD19-ECD (clone: J3-119) (Beckman Coulter Company, Marseille, France) and anti-human CD4-ECD (clone: SFCI12T411) were purchased from Beckman (USA); anti-human CD24-PE-cy7 (clone: eBioSN3), anti-human CD38-APC (clone: HIT2), and anti-human CD25-PE-cy7 (clone: BC96) were from eBiosciencs (San Jose, CA, USA); anti-human CD127-FITC (clone: A019D5) and anti-human PD-1-PE (clone: PD1.3.1.3) were from Miltenyi Biotec (Germany); PDL1-PE (clone: 29E.2A3) was obtained from BioLegend (USA).
Techniques: Isolation, Incubation, Flow Cytometry, Expressing