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Functions of OGDH in primed human embryonic stem cells.

ABSTRACT: Functions of OGDH in primed human embryonic stem cells.

PROVIDER: PRJNA801148 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR17780763_1.fastq.gz	Fastqsanger.gz
	SRR17780763_2.fastq.gz	Fastqsanger.gz
	SRR17780764_1.fastq.gz	Fastqsanger.gz
	SRR17780764_2.fastq.gz	Fastqsanger.gz
	SRR17780765_1.fastq.gz	Fastqsanger.gz

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Functions of OGDH in primed human embryonic stem cells.

Project description:Human embryonic stem cells (hESCs) can self-renew infinitely, or differentiate into the three germ layer lineages in vitro with certain cues, holding great promise to model early human embryo development ex vivo.It is wildly accepted that hESCs take advantage of both glycolysis and mitochondrial respiration to favor the naïve pluripotency, while prefer glycolysis to support the primed pluripotency. Thus, the function of mitochondrial respiration in primed hESCs has been underestimated for a long time, and has not been fully understood yet. Herein, we report that the adenosine triphosphate (ATP) production rate is comparable between mitochondrial respiration and glycolysis, suggesting that mitoATP serves as one of the major sources of the ATP pool in primed hESCs. Next, we constructed a OGDH knockdown cell line whose ability of mitochondrial respiration was impired. Of note, OGDH deficiency led to the exit of primed pluripotency accompanied by cell death.Collectively, the current study unveils that OGDH acts as a key regulator to fine-tune the abundance of TCA cycle metabolites to ensure the mitochondrial respiration activity in primed hESCs, and highlights the pivotal roles of mitochondrial respiration in terms of ATP production and the maintenance of primed pluripotency.

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The functional role of OGDH for maintaining mitochondrial respiration and identity of primed human embryonic stem cells

Project description:Human embryonic stem cells (hESCs) can self-renew infinitely or differentiate into the 3 germ layer lineages in vitro with certain cues, holding great promise to model early human embryo development ex vivo. It is wildly accepted that hESCs take advantage of both glycolysis and mitochondrial respiration to favor the naïve pluripotency, while prefer glycolysis to support the primed pluripotency. Thus, the function of mitochondrial respiration in primed hESCs has been underestimated for a long time, and has not been fully understood yet. Herein, we report that the adenosine triphosphate (ATP) production rate is comparable between mitochondrial respiration and glycolysis, suggesting that mitoATP may serve as one of the major sources of the ATP pool in primed hESCs. To further reveal the function of mitochondrial respiration, we deployed inducible CRISPRi method to inhibit OGDH expression with high efficiency, resulting in the TCA cycle blockade as well as the diminishment of mitochondrial respiration activity and total ATP level. Of note, OGDH deficiency led to the exit of primed pluripotency accompanied by cell death. Furthermore, the treatment with small molecule inhibitors to block electron transport chain (ETC) can phenocopy the loss-of-function of OGDH in hESCs. Therefore, genetic and pharmacological perturbations on mitochondrial respiration can impair the stemness of primed hESCs. Collectively, the current study unveils that OGDH acts as a key regulator to fine-tune the abundance of TCA cycle metabolites to ensure the mitochondrial respiration activity in primed hESCs, and highlights the pivotal roles of mitochondrial respiration in terms of ATP production and the maintenance of primed pluripotency. Our findings may provide insights into the linkage between pluripotent states and energy metabolism in hESCs.

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