Evidence map›Paper›PMID 33551846›Full record

ReviewFrontiers in physiology2020

The Torpid State: Recent Advances in Metabolic Adaptations and Protective Mechanisms

Sylvain Giroud, Caroline Habold, Roberto F Nespolo, Carlos Mejías, Jérémy Terrien, Samantha M Logan, Robert H Henning, Kenneth B Storey

Open access · goldAbstract readReview
In one paragraph

Review in Frontiers in physiology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 52 papers.

0numbers the graph read from it
0cells of the map it votes in
52citing papers in PubMed
24.8field-weighted citation impact, top 1% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

52 citing papers in PubMed, 90 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Article
  5. Review
  6. Article
  7. Article
  8. Article
  9. Mechanisms of Protection Against Oxidative Stress During Hibernation.International journal of molecular sciences · 2026
    Review
  10. Review
  11. Review
  12. Review
  13. Article
  14. Article
  15. Intraspecific variation in metabolic responses to diverse environmental conditions in the Malagasy bat Triaenops menamena.Journal of comparative physiology. B, Biochemical, systemic, and environmental physiology · 2025
    Article
  16. Article
  17. Review
  18. Article
  19. Article
  20. Thermomechanical properties of bat and human red blood cells-Implications for hibernation.Proceedings of the National Academy of Sciences of the United States of America · 2024
    Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors at 7 institutions in 5 countries.

Sylvain GiroudResearch Institute of Wildlife Ecology, Department of Interdisciplinary Life Sciences, University of Veterinary Medicine, Vienna, Austria.
Caroline HaboldUniversity of Strasbourg, CNRS, IPHC, UMR 7178, Strasbourg, France.
Roberto F NespoloInstituto de Ciencias Ambientales y Evolutivas, Universidad Austral de Chile, ANID - Millennium Science Initiative Program-iBio, Valdivia, Chile.
Carlos MejíasInstituto de Ciencias Ambientales y Evolutivas, Universidad Austral de Chile, ANID - Millennium Science Initiative Program-iBio, Valdivia, Chile.
Jérémy TerrienUnité Mécanismes Adaptatifs et Evolution (MECADEV), UMR 7179, CNRS, Muséum National d'Histoire Naturelle, Brunoy, France.
Samantha M LoganDepartment of Biology, Carleton University, Ottawa, ON, Canada.
Robert H HenningDepartment of Clinical Pharmacy and Pharmacology, University Medical Center Groningen, Groningen, Netherlands.
Kenneth B StoreyDepartment of Biology, Carleton University, Ottawa, ON, Canada.
Carleton University · CAAustral University of Chile · CLCentre National de la Recherche Scientifique · FRMécanismes Adaptatifs et Evolution · FRPontificia Universidad Católica de Chile · CLUniversity Medical Center Groningen · NLUniversity of Veterinary Medicine Vienna · AT

Funding

Austrian Science Fund FWF P 27267Austrian Science Fund FWF P 31577
6 · The paper itself

Abstract

Torpor and hibernation are powerful strategies enabling animals to survive periods of low resource availability. The state of torpor results from an active and drastic reduction of an individual's metabolic rate (MR) associated with a relatively pronounced decrease in body temperature. To date, several forms of torpor have been described in all three mammalian subclasses, i.e., monotremes, marsupials, and placentals, as well as in a few avian orders. This review highlights some of the characteristics, from the whole organism down to cellular and molecular aspects, associated with the torpor phenotype. The first part of this review focuses on the specific metabolic adaptations of torpor, as it is used by many species from temperate zones. This notably includes the endocrine changes involved in fat- and food-storing hibernating species, explaining biomedical implications of MR depression. We further compare adaptive mechanisms occurring in opportunistic vs. seasonal heterotherms, such as tropical and sub-tropical species. Such comparisons bring new insights into the metabolic origins of hibernation among tropical species, including resistance mechanisms to oxidative stress. The second section of this review emphasizes the mechanisms enabling heterotherms to protect their key organs against potential threats, such as reactive oxygen species, associated with the torpid state. We notably address the mechanisms of cellular rehabilitation and protection during torpor and hibernation, with an emphasis on the brain, a central organ requiring protection during torpor and recovery. Also, a special focus is given to the role of an ubiquitous and readily-diffusing molecule, hydrogen sulfide (H

Indexed as

antioxidantbody temperatureH2Shibernationhormoneslipidsmetabolic depressionnon-Holarctic heterotherms

Identifiers

PMID33551846
PMCPMC7854925
OpenAlexW3122193154

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.