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4 protocols using sb590885

1

Differentiation of human embryonic stem cells into excitatory postsynaptic cells

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hEPSC were cultured and maintained as described[5] with minor modifications. Briefly, the cells were cultured on mitomycin‐C (Thermo Fisher Scientific) inactivated STO feeder cells, which were seeded on 0.1% gelatin (Sigma Aldrich)‐coated wells at a density of 0.075 × 106 cells/cm2 at least 2 days prior to hEPSC seeding. The hEPSC medium: DMEM/F12, 1× L‐glutamine, 1× penicillin–streptomycin, 1× NEAA, 0.1 µm 2‐mercaptoethanol, 1× N2 supplement, 1× B27 supplement (Thermo Fisher Scientific), and 65 µg mL−1 L‐ascorbic acid (Sigma Aldrich) supplemented with 2.5 µm XAV939 (Sigma Aldrich), 0.15 µm A419259 (Tocris); 1.0 µm CHIR99021 (Stemgent), 0.25 µm SB590885 (R&D), and 10 ng mL−1 recombinant human LIF (PeproTech). 20% Knock‐out serum replacement (KOSR; Thermo Fisher Scientific) and 10 µm Y‐27632 (Stemcell Technologies) were supplemented to the medium on the day of hEPSC seeding and hEPSC were passaged every 3–4 days.
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2

Inhibitor Preparation for Cell Studies

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TAK-632 (#S7291), Vemurafenib (PLX4032, #1267), and Encorafenib (LGX818, #S7108) were purchased from Selleck Chemicals LLC, Houston, TX, USA. Sorafenib tosylate (Axon 1397) was from Axon Medchem, Groningen, The Netherlands, and SB-590885 (2650/10) was purchased from R&D Systems, Minneapolis, MN, USA. Inhibitors were dissolved in DMSO. Stocks were kept at −80 °C and further diluted in DMSO as required.
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3

Resetting Human Embryonic Stem Cells to Naive State

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Cells were reverted to the naive ground state in 5iLAF as described previously (Theunissen et al., 2014 (link)). At day 7, primed hESCs were dissociated into single cells with accutase and re-plated on MEFs in hESC media with Y27632 (Stemgent, 04–0012-10) at a density of 200k cells/well per 6-well plate. After one day, media was changed to 5iLAF media including a 50/50 mixture of DMEM/F12 (Gibco 11320–033) and Neurobasal (Gibco 21103–049), 1X N2 (Gibco 17502–048), 1X B27 (17504–044), 20 ng/mL rhLIF (Millipore LIF1005), 1 mM GlutaMAX (Gibco 35050–061), 1% NEAA (Gibco 11140–050), .1 mM 2-Mercaptoethanol (GIBCO, 21985–023), 1x Penicillin-Streptomycin (Gibco 15140–122), 50 ug/mL BSA (Gibco A10008–01), 1 mM PD0325901 (Stemgent 04–006-02), 1 mM IM-12 (BML-WN102–0005), .05 mM SB590885 (R&D 2650/10), 1 uM WH-4–023 (A Chemtek H620061), 10 uM Y-27632, 20 ng/mL Activin A (Peprotech AF-120–14E), 8 ng/mL FGF2 (Proteintech HZ1285), .50% KSR (Gibco 10828–028), and 1X primocin (Invitrogen (ant-pm-2). Media is changed daily and cells are passaged every 5 days at a ratio between 1:1 and 1:3 until robust colonies emerge.
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4

SWR-PGCLC Expansion on MMC-treated m246 Cells

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m246 feeder cells were treated with MMC (5 μg/ml) for 2 hours, washed with PBS, and then cultured with STO [DMEM, high glucose (Nacalai, #08458-45), 10% (v/v) FBS(Gibco, #10437028), 2 mM l-glutamine, and penicillin/streptomycin (50 U/ml)] medium for 5 hours. MMC-treated m246 cells were stored at −80°C. At 6 hours before sorting of SWR-PGCLCs, MMC-treated m246 feeder cells were seeded at 1 × 105 or 2 × 105 cells per well of a 24- or 12-well plate, respectively. SWR-PGCLCs at day 6 of induction were sorted and seeded at 5 × 103 or 1 × 104 cells per well of a 24- or 12-well plate, respectively, with expansion medium [advanced RPMI 1640, 10% (v/v) KSR, 2.5% (v/v) FBS, 1× NEAA, 1× GlutaMAX, and penicillin/streptomycin (50 U/ml)] supplemented with bFGF (20 ng/ml), 6 μM CHIR, 2.5 μM endo-IWR1, and 0.5 μM SB590885 (R&D Systems, #2650). The medium was then supplemented with 10 μM of Y-27632 for the first 48 hours of culture. The medium was changed every 2 days with the addition of 1 × 105 or 2 × 105 of MMC-treated m246 feeder cells to the well of the 24- or 12-well plate, respectively.
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