Metabolic Dynamics in Preimplantation Embryos
Summary
Preimplantation embryos undergo a finely tuned sequence of metabolic transitions as they develop from a single‐cell zygote to a multicellular blastocyst. In the earliest stages, energy is derived mainly from pyruvate and select amino acids under low‐oxygen conditions, reflecting limited mitochondrial activity. As cells proliferate, there is a marked shift towards increased glycolytic flux and activation of oxidative phosphorylation, accompanied by engagement of the tricarboxylic acid (TCA) cycle. These metabolic shifts coincide with critical developmental milestones such as zygotic genome activation and lineage specification. Beyond energy provision, metabolites act as signalling molecules that regulate epigenetic modifiers—NAD⁺-dependent deacetylases and one-carbon donors among them—thus ensuring coordinated gene expression. Insight into these pathways informs culture media formulation in assisted reproduction, refines non-invasive embryo assessment and advances our understanding of early developmental competence.
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Metabolic Dynamics in Preimplantation Embryos publication trend
The graph below shows the total number of articles in metabolic dynamics in preimplantation embryos across all publications each year (not limited to Nature Index journals).
Technical terms
Metabolomics: Comprehensive analysis of small-molecule metabolites within a biological sample.
Glycolysis: Cytosolic pathway converting glucose to pyruvate, producing ATP and NADH.
Oxidative phosphorylation: Mitochondrial process coupling electron transfer to ATP synthesis via the electron transport chain.
TCA cycle: Mitochondrial series of reactions oxidising acetyl-CoA to generate reducing equivalents for respiration.
Blastocyst: Preimplantation embryo stage comprising an inner cell mass and trophectoderm, poised for uterine implantation.
Pyruvate: End product of glycolysis serving as a key substrate for mitochondrial oxidation.
References
- Metabolomics Integration in Assisted Reproductive Technologies for Enhanced Embryo Selection beyond Morphokinetic Analysis. International Journal of Molecular Sciences (2023).
- Embryonic diapause due to high glucose is related to changes in glycolysis and oxidative phosphorylation, as well as abnormalities in the TCA cycle and amino acid metabolism. Frontiers in Endocrinology (2023).
- Rapid and non-invasive diagnostic techniques for embryonic developmental potential: a metabolomic analysis based on Raman spectroscopy to identify the pregnancy outcomes of IVF-ET. Frontiers in Cell and Developmental Biology (2023).
- Metabolic control of histone acetylation for precise and timely regulation of minor ZGA in early mammalian embryos. Cell Discovery (2022).
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