Abstract
Previous studies suggest that mouse embryonic stem cells (mESCs) have a unique requirement for threonine when cultured in serum and leukemia inhibitory factor (LIF). Here, we replicated the experiments and found that the growth of mESCs (E14 and AB2.2) in serum/LIF was significantly attenuated by the individual absence of multiple amino acids. When mESCs were maintained in naïve pluripotency by the MEK inhibitor, GSK3 inhibitor (2i), and LIF, their growth was significantly affected by the lack of any one of the nine essential amino acids or some non-essential amino acids. There was no unique requirement for threonine in both culture conditions. This study shows that, like many other cells, mESCs do not have any special requirements for amino acids.
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