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Distinctive Krebs cycle remodeling in iPSC-derived neural and mesenchymal stem cells

Author:
Benlamara, Sarah, Aubry, Laetitia, Fabregue, Julien, Bénit, Paule, Rustin, Pierre, Rak, Malgorzata
Source:
Biochemical and biophysical research communications 2019 v.511 no.3 pp. 658-664
ISSN:
0006-291X
Subject:
alpha-ketoglutaric acid, cell differentiation, electron transport chain, energy, induced pluripotent stem cells, isocitrate dehydrogenase, mesenchymal stromal cells, mitochondria, neural stem cells, tricarboxylic acid cycle
Abstract:
Mitochondria play a vital role in proliferation and differentiation and their remodeling in the course of differentiation is related to the variable energy and metabolic needs of the cell. In this work, we show a distinctive mitochondrial remodeling in human induced pluripotent stem cells differentiated into neural or mesenchymal progenitors. While leading to upregulation of the citrate synthase-α-ketoglutarate dehydrogenase segment of the Krebs cycle and increased respiratory chain activities and respiration in the mesenchymal stem cells, the remodeling in the neural stem cells resulted in downregulation of α-ketoglutarate dehydrogenase, upregulation of isocitrate dehydrogenase 2 and the accumulation of α-ketoglutarate. The distinct, lineage-specific changes indicate an involvement of these Krebs cycle enzymes in cell differentiation.
Agid:
6316936