Metabolites can regulate stem cell behavior through the STAT3/AKT pathway in a similar trend to that under hypoxic conditions

Stem cell therapy has long been considered a promising mode of treatment for many incurable diseases. Human mesenchymal stem cells (hMSCs) have provided the most promising results to date for regenerative medicine. Nevertheless, due to several obstacles such as difficulty in sourcing and characterizing hMSCs, they remain largely unavailable for clinical use. The signaling requirements for maintaining stem cell function have been studied widely, but little is known about how metabolism contributes to stem cell function. hMSCs have been shown to promote therapeutic efficacy in hypoxic conditions through metabolic conversion. According to published studies, certain metabolites are able to convert stem cell metabolism from oxidative phosphorylation to glycolysis. In this study, we selected several metabolites (fructose-1,6-bisphosphate (FBP), Phosphoenolpyruvic acid (PEP) and sodium oxalate (OXA)) to examine the relation between metabolites and stem cell functions. In addition, we investigated the ability of selected metabolites to induce rapid expansion of this cell population. Our results indicate that selected metabolites stimulate stem cell proliferation by induce glycolytic metabolism via AKT/STAT signaling.