Single cell suspensions were incubated with blocking
CD16/32 antibody (BioLegend #101301) and then
Fixable Viability Dye (ThermoFisher Scientific). All staining used 0.5-5x10
6 cells stained in 100ul 3% FBS in PBS with antibodies at manufacturer’s recommendation unless otherwise specified. Antibodies included CD4(GK1.5), CD8(53–6.7), CD25(A18246A), CD44(IM7), CD62L(MEL-14), CD45(QA17A26), CD45.1(A20), CD45.2(104), CD45RB (C363-16A), IL7Ra(A7R34), CCR7(4B12), TIGIT(1G9), ICOS (C398.4A), and GITR(DTA-1). Surface-directed antibodies were stained for 20 min at 4°C then washed before analysis or intracellular staining. For detection of intracellular proteins, the
Foxp3/Transcription Factor Staining Buffer Set (Thermofisher Scientific #00-5523-00) was used. Intracellular Antibodies included FOXP3 (FJK-16s), IFNγ (XMG1.2), IL17A(TC11-18H10.1), GM-CSF(MP1-22E9), IRF8 (V3GYWCH), IRF4(IRF4.3E4), HELIOS (22F6), TCF-1(S33-966). For samples requiring intracellular cytokine staining cells were first incubated for 4 h with 25 ng/mL PMA, 0.5uM ionomycin, and 10 μg/mL monensin. All analysis was performed on a
BD LSRFortessa X-20 Analyzer and a
BD FACSymphony A5-Laser Analyzer. All cell sorting was performed on BD SORP FACS Aria II or Miltenyi Tyto. All analysis was performed on FlowJo v10 (BD).
Chaudhuri S.M., Weinberg S.E., Wang D., Yalom L.K., Montauti E., Iyer R., Tang A.Y., Torres Acosta M.A., Shen J., Mani N.L., Wang S., Liu K., Lu W., Bui T.M., Manzanares L.D., Dehghani Z., Wai C.M., Gao B., Wei J., Yue F., Cui W., Singer B.D., Sumagin R., Zhang Y, & Fang D. (2024). Mediator complex subunit 1 architects a tumorigenic Treg cell program independent of inflammation. Cell Reports Medicine, 5(3), 101441.