To prepare a feeder layer, 1 × 10 irradiated L Wnt-3A cells (ATCC, Manassas, VA) were seeded in a 96-well plate and cultured with a feeder medium at 5% CO2 at 37°C for 16 hr.
To prepare a feeder layer, 2 × 10 irradiated 3T3-L1 cellSigma-Aldrichich) were seeded in a 96-well plate and cultured with a feeder medium (Advanced DMEM/F12 medium supplemented with 2 mM GlutaMax, 10 mM HEPES, 1 mM sodium pyruvate, 10% FBS, 100 U/ml penicillin, 100 μg/ml streptomycin, and 250 ng/ml amphotericin B (Invitrogen)) at 5% CO2 at 37°C for 16 hr.
To establish feeder-free cultures, feeders were removed gradually over four passages and resulting TS cells cultured in feeder-conditioned medium (Tanaka, 2006).
Day 1 Lecture on hESCs; Identify undifferentiated and differentiated hESC colonies; make/check feeders and medium; Feed hESCs.
Prior to DNA extraction for SNP analysis, cells were cultured for at least four passages under feeder-free culture conditions on Matrigel Growth Factor Reduced (Becton Dickinson AG, Basel, Switzerland) coated 6-well plates with feeder-conditioned medium (CM).
hESCs were passaged in feeder-free medium supplemented with cocktail inhibitors for at least three generations without obvious differentiation (Figure 5F) and restored differentiation into three cell lineages following drug removal (Figure 5G), suggesting reversible effect of the inhibitors.
HESCs were grown on mitomycin C-treated murine embryonic fibroblast (MEF) feeders in medium containing KO-DMEM, 20% knockout serum replacement, 10ng/ml bFGF, 1% non-essential aminoacids, 1% Glutamax, 0,1% beta-Mercaptoethanol and 1% Penicillin/Streptomycin (all from GIBCO, Invitrogen).
Early hESC culture systems typically include the use of mouse embryonic fibroblast (MEF) feeders or medium conditioned on MEFs in the presence of serum or serum substitutes such as knockout serum replacement [1] [3].
hES cells are most commonly maintained on inactivated mouse embryonic fibroblasts (MEFs) feeders in medium supplemented with knockout serum-replacement (KSR) together with basic fibroblast growth factors (bFGF, or FGF 2).
129 mESCs can be derived and maintained in the absence of feeders in medium supplemented with LIF and FCS (Nagy et al., 1993).
In our more recent work, the hESCs have been cultured in mTeSR-1 (Stem Cell Technologies), a defined feeder-free medium which is also highly mitogenic [ 9], and we investigated whether and to what degree the pro-myogenic effects of hESC-conditioned medium was due to the residual activity of the hESC growth/expansion medium.
