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3 protocols using glutamax

1

Cytotoxicity Evaluation of Test Compounds

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Human malignant melanoma SKMEL-5 cells were obtained from the American
Type Culture Collection (ATCC HTB-70, Manassas, VA, USA) and were
maintained in 5% CO2 at 37 °C and cultured in Eagle’s
Minimum Essential Medium (EMEM; Cellgro) plus GlutaMAX supplemented
with 10% fetal bovine serum (FBS; Omega Scientific) and 1% penicillin/streptomycin
(Omega Scientific).
Approximately 30 000 cells were seeded
into individual wells of a 96-well tissue culture plate and incubated
for 24 h. Cells were replenished with fresh medium (0.1 mL/well; 5%
FBS, no antibiotics) and exposed to triplicates of different concentration
solutions (from 0.4 to 100 μM) of test compounds. The analyzed
inhibitors were dissolved in DMSO, reaching a final DMSO concentration
of 1%. After incubation for 24 h at 37 °C and 5% CO2, cell viability was assessed using ATPlite assay from PerkinElmer
(Waltham, MA). Viability was normalized to control cells which were
treated with the vehicle, DMSO. The reported IC50 values
were calculated by Prism5 (GraphPad).
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2

Allogeneic T Cell Proliferation Assay

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The assay was performed as previously described (29 (link)). Briefly, recipient PBMCs were labeled with a CellTrace Violet dye (Invitrogen) and mixed with appropriate donor sBCs at the ratio of 2 sBCs to 1 PBMC. To assess general alloreactivity, a mixture of six sBCs with distinct HLA types was used instead of donor sBC to stimulate the recipient PBMCs. The cells were cultured in RPMI 1640 medium supplemented with GlutaMAX, 10% human AB serum (Omega Scientific), 1% nonessential amino acids, 1% sodium pyruvate, and 1% penicillin/streptomycin (all reagents were from Gibco unless stated otherwise) for 84 to 96 hours before staining with antibodies to CD4, CD8, FOXP3, and HELIOS (table S8) as described above for flow cytometry. The samples were measured on a Navios (Beckman Coulter) flow cytometer, and CellTrace Violet dilution in Tregs (CD4+FOXP3+HELIOS+), Tconv (CD4+, not Treg gate), and CD8+ T cells were analyzed using Kaluza software (Beckman Coulter).
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3

Routine culture of mouse embryonic stem cells

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R1 mESCs were purchased from ATCC and cultured at 37°C and 5% CO2. Routine culture of mESCs was carried out in media containing DMEM with GlutaMAX (Thermo Fisher, Waltham, MA), 15% fetal bovine serum (GE Healthcare, Chicago, IL), 1 mM sodium pyruvate, MEM nonessential amino acids, 50 μM β-mercaptoethanol, 100 U/ml penicillin, 100 μg/ml streptomycin (all from Thermo Fisher), and 1000 U/ml LIF (Millipore Sigma, Burlington, MA) in tissue culture plates coated with 0.1% gelatin. For serum-free culture, cells were maintained in one volume DMEM/F12 with GlutaMAX combined with one volume Neurobasal media, with 0.5% N2 Supplement, 1% B27 Supplement, 0.033% bovine serum albumin (BSA), 50 μM β-mercaptoethanol, 100 U/ml penicillin, and 100 μg/ml streptomycin (all from Thermo Fisher) in tissue culture plates coated with 2.5 μg/cm2 human fibronectin (Thermo Fisher). HEK293T cells and L cells were cultured in DMEM with GlutaMAX supplemented with 10% fetal bovine serum (FBS; Omega Scientific, Tarzana, CA), 100 U/ml penicillin, and 100 μg/ml streptomycin. Carrier-free recombinant mouse Wnt3a was purchased from R&D, reconstituted in 0.1% BSA/phosphate buffered saline (PBS), and added to culture at specified concentrations.
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