MDH1-mediated Malate-aspartate NADH Shuttle Maintains the Activity Levels of Fetal Liver Hematopoietic Stem Cells
Overview
Authors
Affiliations
The connections between energy metabolism and stemness of hematopoietic stem cells (HSCs) at different developmental stages remain largely unknown. We generated a transgenic mouse line for the genetically encoded NADH/NAD+ sensor (SoNar) and demonstrate that there are 3 distinct fetal liver hematopoietic cell populations according to the ratios of SoNar fluorescence. SoNar-low cells had an enhanced level of mitochondrial respiration but a glycolytic level similar to that of SoNar-high cells. Interestingly, 10% of SoNar-low cells were enriched for 65% of total immunophenotypic fetal liver HSCs (FL-HSCs) and contained approximately fivefold more functional HSCs than their SoNar-high counterparts. SoNar was able to monitor sensitively the dynamic changes of energy metabolism in HSCs both in vitro and in vivo. Mechanistically, STAT3 transactivated MDH1 to sustain the malate-aspartate NADH shuttle activity and HSC self-renewal and differentiation. We reveal an unexpected metabolic program of FL-HSCs and provide a powerful genetic tool for metabolic studies of HSCs or other types of stem cells.
Ma B, Li F, Fu X, Luo X, Lin Q, Liang H Viruses. 2024; 16(10).
PMID: 39459874 PMC: 11512393. DOI: 10.3390/v16101540.
Homeostatic regulation of NAD(H) and NADP(H) in cells.
Chen L, Xing X, Zhang P, Chen L, Pei H Genes Dis. 2024; 11(5):101146.
PMID: 38988322 PMC: 11233901. DOI: 10.1016/j.gendis.2023.101146.
A negative feedback loop underlies the Warburg effect.
Jaiswal A, Singh R NPJ Syst Biol Appl. 2024; 10(1):55.
PMID: 38789545 PMC: 11126737. DOI: 10.1038/s41540-024-00377-x.
Crosstalk between DNA Damage Repair and Metabolic Regulation in Hematopoietic Stem Cells.
Xu J, Fei P, Simon D, Morowitz M, Mehta P, Du W Cells. 2024; 13(9.
PMID: 38727270 PMC: 11083014. DOI: 10.3390/cells13090733.
The acetylation of MDH1 and IDH1 is associated with energy metabolism in acute liver failure.
Shi C, Zhang Y, Chen Q, Wang Y, Zhang D, Guo J iScience. 2024; 27(5):109678.
PMID: 38660411 PMC: 11039345. DOI: 10.1016/j.isci.2024.109678.