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African naked mole-rats demonstrate extreme tolerance to hypoxia and hypercapnia

Item Type:Article
Title:African naked mole-rats demonstrate extreme tolerance to hypoxia and hypercapnia
Creators Name:Park, T.J. and Smith, E.S.J. and Reznick, J. and Bennett, N.C. and Applegate, Daniel T and Larson, J. and Lewin, G.R.
Abstract:Naked mole-rats are extremely tolerant to low concentrations of oxygen (hypoxia) and high concentrations of carbon dioxide (hypercapnia), which is consistent with the environment that they inhabit. Naked mole-rats combine subterranean living with living in very densely populated colonies where oxygen becomes depleted and carbon dioxide accumulates. In the laboratory, naked mole-rats fully recover from 5 h exposure to 5% O(2) and 5 h exposure to 80% CO(2), whereas both conditions are rapidly lethal to similarly sized laboratory mice. During anoxia (0% O(2)) naked mole-rats enter a suspended animation-like state and switch from aerobic metabolism of glucose to anaerobic metabolism of fructose. Additional fascinating characteristics include that naked mole-rats show intrinsic brain tolerance to anoxia; a complete lack of hypoxia-induced and CO(2)-induced pulmonary edema; and reduced aversion to high concentrations of CO(2) and acidic fumes. Here we outline a constellation of physiological and molecular adaptations that correlate with the naked mole-rat’s hypoxic/hypercapnic tolerance and which offer potential targets for ameliorating pathological conditions in humans, such as the damage caused during cerebral ischemia.
Keywords:Physiological Adaptation, Hypercapnia, Hypoxia, Oxygen, Animals, Mice, Mole Rats
Source:Advances in Experimental Medicine and Biology
Series Name:Advances in Experimental Medicine and Biology
Title of Book:The Extraordinary Biology of the Naked Mole-Rat
Page Range:255-269
Number of Pages:445
Date:24 August 2021
Official Publication:https://doi.org/10.1007/978-3-030-65943-1_9
PubMed:View item in PubMed

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