ArticleThe Journal of experimental biology2025
Arousal from hibernation increases blood oxygen saturation in 13-lined ground squirrels.
Article in The Journal of experimental biology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- Using Organoids to Unlock the Potential of Human Torpor for Spaceflight.Current stem cell reports · 2026Article
- Synchronization of the 12-h circatidal rhythm maintains the kidney through repeated cycles of warm reperfusion in the hibernating ground squirrel.Function (Oxford, England) · 2026Article
- Candidate Mechanisms of Cerebral Ischemia/Hypoxia Tolerance: Insights from Hibernating Rodents.Neurochemical research · 2026Review
- Hibernation-Inspired Innovations in Biomedicine: Addressing Aging, Chronic Diseases, and Critical Care.Canadian journal of zoology · 2026Article
- Review
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Authors and funding
3 authors.
Funding
Abstract
Hibernating Ictidomys tridecemlineatus, 13-lined ground squirrels, are considered models of ischaemia-reperfusion tolerance, as both tissues and isolated mitochondria withstand anoxia followed by rapid re-oxygenation in vitro. This tolerance is likely adaptive, protecting against damage during the numerous arousals from torpor throughout the hibernation season. O2 availability is likely low during torpor, but suppressed metabolism lowers O2 demand, potentially mitigating hypoxic stress. During arousal to interbout euthermia (IBE), heart rate, blood pressure and ventilation increase rapidly, suggesting increased O2 availability, but tissue oxygenation has not been measured during arousal or IBE in 13-lined ground squirrels. Using pulse-oximetry collars, we characterized dramatic increases in O2 availability during arousal; carotid artery O2 saturation rose from as low as 35% early in arousal to 87% during IBE. These changes closely followed rising heart rate. Our results demonstrate that hibernating 13-lined ground squirrels survive profound O2 deprivation early in arousal and rapid O2 influx as arousal progresses.
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Registered trials
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