Hamraz 2019 FASEB J

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Hamraz M, Abolhassani R, Andriamihaja M, Ransy C, Lenoir V, Schwartz L, Bouillaud F (2019) Hypertonic external medium represses cellular respiration and promotes Warburg/Crabtree effect. FASEB J 34:222-36.

» PMID: 31914644 Open Access

Hamraz M, Abolhassani R, Andriamihaja M, Ransy C, Lenoir V, Schwartz L, Bouillaud F (2019) FASEB J

Abstract: Hyperosmotic conditions are associated to several pathological states. In this article, we evaluate the consequence of hyperosmotic medium on cellular energy metabolism. We demonstrate that exposure of cells to hyperosmotic conditions immediately reduces the mitochondrial oxidative phosphorylation rate. This causes an increase in glycolysis, which represses further respiration. This is known as the Warburg or Crabtree effect. In addition to aerobic glycolysis, we observed two other cellular responses that would help to preserve cellular ATP level and viability: A reduction in the cellular ATP turnover rate and a partial mitochondrial uncoupling which is expected to enhance ATP production by Krebs cycle. The latter is likely to constitute another metabolic adaptation to compensate for deficient oxidative phosphorylation that, importantly, is not dependent on glucose.

© 2019 Federation of American Societies for Experimental Biology.

Keywords: Crabtree effect, Krebs cycle, Warburg effect, Bioenergetics, Cancer, Inflammation Bioblast editor: Plangger M


Labels: MiParea: Respiration, Comparative MiP;environmental MiP 


Organism: Human, Rat, Other mammals  Tissue;cell: Liver, Endothelial;epithelial;mesothelial cell, HEK, Neuroblastoma  Preparation: Isolated mitochondria, Intact cells 


Coupling state: LEAK, OXPHOS, ET  Pathway: N, CIV, ROX  HRR: Oxygraph-2k 

Labels, 2020-01