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Fructose-driven glycolysis supports anoxia resistance in the naked mole-rat

Accepted version
Peer-reviewed

Type

Article

Change log

Authors

Park, TJ 
Reznick, J 
Peterson, BL 
Blass, G 
Omerbašić, D 

Abstract

The African naked mole-rat’s (Heterocephalus glaber) social and subterranean lifestyle generates a hypoxic niche. Under experimental conditions, naked mole-rats tolerate hours of extreme hypoxia and survive 18 minutes of total oxygen deprivation (anoxia) without apparent injury. During anoxia, the naked mole-rat switches to anaerobic metabolism fueled by fructose, which is actively accumulated and metabolized to lactate in the brain. Global expression of the GLUT5 fructose transporter and high levels of ketohexokinase were identified as molecular signatures of fructose metabolism. Fructose-driven glycolytic respiration in naked mole-rat tissues avoids feedback inhibition of glycolysis via phosphofructokinase, supporting viability. The metabolic rewiring of glycolysis can circumvent the normally lethal effects of oxygen deprivation, a mechanism that could be harnessed to minimize hypoxic damage in human disease.

Description

Keywords

Adaptation, Physiological, Anaerobiosis, Animals, Brain, Fructokinases, Fructose, Glucose Transporter Type 5, Glycolysis, Lactic Acid, Mice, Mole Rats, Myocardium, Oxygen, Sucrose

Journal Title

Science

Conference Name

Journal ISSN

0036-8075
1095-9203

Volume Title

356

Publisher

American Association for the Advancement of Science
Sponsorship
Work was supported aEuropean Research Council (294678), the Deutsche Forschungsgemeinschaft SFB 665 and Go865/9-1, NSF (grant #0744979 ), NIH (grants HL71626 and HL606.