Maintenance of a fully functional digestive system during hibernation in the European hamster, a food-storing hibernator

Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
Mathieu WeittenCaroline Habold

Abstract

Some small mammals limit energy expenditure during winter conditions through torpor bouts, which are characterized by a decrease in body temperature and metabolic rate. Individuals arise periodically from torpor to restore critical functions requiring euthermia. Although most of the species involved do not feed during hibernation and rely on body reserves to fulfil energy requirements (fat-storing species), others hoard food in a burrow (food-storing species) and can feed during interbout euthermy. Whereas fat-storing species undergo a marked atrophy of the digestive tract, food-storing species have to maintain a functional digestive system during hibernation. Our study aimed to evaluate the absorption capacities of a food-storing species, the European hamster, throughout the annual cycle. In vivo intestinal perfusions were conducted in different groups of hamsters (n=5) during the different life periods, namely before hibernation, in torpor, during interbout euthermy, and during summer rest. The triglyceride, non-esterified free fatty acid, starch, glucose and protein composition of the perfusate was evaluated before and after the 1h perfusion of a closed intestinal loop. Triglyceride, starch and protein hydrolysis rates were ...Continue Reading

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Citations

Jul 20, 2018·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·Mathieu WeittenCaroline Habold
Feb 9, 2021·Frontiers in Physiology·Sylvain GiroudKenneth B Storey
Mar 9, 2021·Frontiers in Physiology·Fabrice BertileSylvain Giroud
Jun 19, 2021·Neuroscience and Biobehavioral Reviews·Matteo CerriRoberto Amici

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