Optimization of Differentiation Media for Human Induced Pluripotent Stem
Cells using Design of Experiments
Abstract
The implementation of human pluripotent stem cells (hiPSCs) in cell
therapy has an extraordinary potential but faces many practical
challenges, including costs associated with growth media and factors.
There is an immediate need to establish an optimized culture platform to
direct the differentiation of hiPSCs into germ layers in a defined
nutritional microenvironment to generate cost-effective and robust
therapeutics. The aim of this study was to identify the optimal
nutritional environment by mimicking the in vivo concentrations of three
key factors (glucose, pyruvate and oxygen) during the spontaneous
differentiation of hiPSCs derived from cord blood, which greatly differ
from the in vitro expansion and differentiation scenarios. Moreover, we
hypothesized that the high glucose, pyruvate and oxygen concentrations
found in typical growth media could inhibit the differentiation of
certain lineages. A design of experiments (DoE) was used to investigate
the interaction between these three variables during the spontaneous
differentiation of hiPSCs. We found that lower oxygen and glucose
concentrations enhance the expression of mesodermal (Brachyury, KIF1A)
and ectodermal (Nestin, B-Tubulin) markers. Our findings present a novel
approach for efficient directed differentiation of hiPSCs through the
manipulation of media components whilst simultaneously avoiding the
usage of growth factors thus reducing costs.