Mitochondrial metabolism modulates differentiation and teratoma formation capacity in mouse embryonic stem cells.
Relatively little is known regarding the role of mitochondrial metabolism in stem cell biology. Here we demonstrate that mouse embryonic stem cells sorted for low and high resting mitochondrial membrane potential (DeltaPsi(m)L and DeltaPsi(m)H) are indistinguishable morphologically and by the expression of pluripotency markers, whereas markedly differing in metabolic rates. Interestingly, DeltaPsi(m)L cells are highly efficient at in vitro mesodermal differentiation yet fail to efficiently form teratomas in vivo, whereas DeltaPsi(m)H cells behave in the opposite fashion. We further demonstrate that DeltaPsi(m) reflects the degree of overall mammalian target of rapamycin (mTOR) activation and that the mTOR inhibitor rapamycin reduces metabolic rate, augments differentiation, and inhibits tumor formation of the mouse embryonic stem cells with a high metabolic rate. Taken together, our results suggest a coupling between intrinsic metabolic parameters and stem cell fate that might form a basis for novel enrichment strategies and therapeutic options.
Schieke
Stefan M
SM
Translational Medicine Branch, NHLBI, National Institutes of Health, Bethesda, Maryland 20892, USA.
Ma
Mingchao
M
Cao
Liu
L
McCoy
J Philip
JP
Liu
Chengyu
C
Hensel
Nancy F
NF
Barrett
A John
AJ
Boehm
Manfred
M
Finkel
Toren
T
D000818:Animals; D002454:Cell Differentiation; D002460:Cell Line; D002467:Cell Nucleus / Q000378:metabolism; D053595:Embryonic Stem Cells / Q000166:cytology*; D008297:Male; D008564:Membrane Potentials; D051379:Mice; D016513:Mice, SCID; D008928:Mitochondria / Q000378:metabolism*; D008954:Models, Biological; D010100:Oxygen / Q000378:metabolism; D010101:Oxygen Consumption; D011494:Protein Kinases / Q000378:metabolism; D058570:TOR Serine-Threonine Kinases; D013724:Teratoma / Q000378:metabolism / Q000473:pathology*
D011494:Protein Kinases; C546843:mTOR protein, mouse; D058570:TOR Serine-Threonine Kinases; D010100:Oxygen