Cells were grown under two different culture conditions, prepared as follows:
2i/2iLIF: serum-free KSR (knockout serum replacement) 10% (Life Technologies, cat. 10828-028) - based medium in GMEM (Sigma-Aldrich, cat. G5154) supplemented with 1%
FBS (Sigma-Aldrich, cat. F7524), 100 mM
2- mercaptoethanol (Sigma-Aldrich, cat. M7522), 1×
MEM non-essential amino acids (Invitrogen, cat. 1140-036), 2 mM
L-glutamine, 1 mM
sodium pyruvate (both from Invitrogen), and with small-molecule inhibitors PD (1 μM, PD0325901), CH (3 mM, CHIR99021) from Axon (cat. 1386 and 1408) and LIF (100 units/ml, produced in-house).
Serum LIF: GMEM (Sigma-Aldrich, cat. G5154) supplemented with 10%
FBS (Sigma-Aldrich, cat. F7524), 100 mM 2-mercaptoethanol (Sigma-Aldrich, cat. M7522), 1×
MEM non-essential amino acids (Invitrogen, cat. 1140-036), 2 mM
L-glutamine, 1 mM
sodium pyruvate (both from Invitrogen), and 100 units/ml LIF.
Betto R.M., Diamante L., Perrera V., Audano M., Rapelli S., Lauria A., Incarnato D., Arboit M., Pedretti S., Rigoni G., Guerineau V., Touboul D., Stirparo G.G., Lohoff T., Boroviak T., Grumati P., Soriano M.E., Nichols J., Mitro N., Oliviero S, & Martello G. (2021). Metabolic control of DNA methylation in naïve pluripotent cells. Nature genetics, 53(2), 215-229.