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Efficient Neural Differentiation using Single-Cell Culture of Human Embryonic Stem Cells
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Elevated Exogenous Pyruvate Potentiates Mesodermal Differentiation through Metabolic Modulation and AMPK/mTOR Pathway
Chengcheng Song1, Faxiang Xu1, Zhili Ren1
1Centre of Reproduction, Development and Aging, Faculty of Health Sciences, University of Macau, Macau, China.
Stem Cell Reports
|July 30, 2019
Summary
Exogenous pyruvate enhances human embryonic stem cell (hESC) differentiation by shifting metabolism toward oxidative phosphorylation. It also activates key signaling pathways, promoting mesoderm and endoderm lineage specification.
Area of Science:
- Cell Biology
- Metabolic Regulation
- Developmental Biology
Background:
- Pyruvate is crucial for cellular metabolism, impacting glycolysis and the TCA cycle.
- Exogenous pyruvate supports human preimplantation embryos and human embryonic stem cells (hESCs), but its role in epiblast differentiation is unclear.
Purpose of the Study:
- To investigate the role of exogenous pyruvate in cell-fate determination during hESC epiblast differentiation.
- To elucidate the metabolic and signaling mechanisms by which pyruvate influences differentiation.
Main Methods:
- Human embryonic stem cells (hESCs) were used as a model system.
- Metabolic balance was assessed under varying pyruvate conditions.
- Lineage specification was analyzed during differentiation.
- Signaling pathway modulation (AMPK, mTOR) was investigated.
Main Results:
- Elevated exogenous pyruvate shifted hESC metabolism towards oxidative phosphorylation.
- Pyruvate potentiated mesoderm and endoderm lineage specification during differentiation.
- Pyruvate production and mitochondrial metabolism were essential for BMP4-induced mesoderm differentiation.
- Pyruvate increased the AMP/ATP ratio, activated AMPK, and modulated the mTOR pathway.
Conclusions:
- Exogenous pyruvate plays a significant role in hESC differentiation by modulating both metabolism and signaling pathways.
- Pyruvate enhances mesoderm differentiation through the AMPK and mTOR signaling cascades.
- Understanding pyruvate's role offers insights into controlling stem cell fate.
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