Avian red blood cell mitochondria produce more heat in winter than in autumn
(2021) In FASEB journal : official publication of the Federation of American Societies for Experimental Biology 35(5).- Abstract
Endotherms in cold regions improve heat-producing capacity when preparing for winter. We know comparatively little about how this change is fueled by seasonal adaptation in cellular respiration. Thus, we studied the changes of mitochondrial function in red blood cells in sympatric Coal (Periparus ater), Blue (Cyanistes caeruleus), and Great (Parus major) tits between autumn and winter. These species differ more than twofold in body mass and in several aspects of their foraging ecology and social dominance, which could require differential seasonal adaptation of energy expenditure. Coal and Great tits in particular upregulated the mitochondrial respiration rate and mitochondrial volume in winter. This was not directed toward ATP... (More)
Endotherms in cold regions improve heat-producing capacity when preparing for winter. We know comparatively little about how this change is fueled by seasonal adaptation in cellular respiration. Thus, we studied the changes of mitochondrial function in red blood cells in sympatric Coal (Periparus ater), Blue (Cyanistes caeruleus), and Great (Parus major) tits between autumn and winter. These species differ more than twofold in body mass and in several aspects of their foraging ecology and social dominance, which could require differential seasonal adaptation of energy expenditure. Coal and Great tits in particular upregulated the mitochondrial respiration rate and mitochondrial volume in winter. This was not directed toward ATP synthesis, instead reflecting increased uncoupling of electron transport from ATP production. Because uncoupling is exothermic, this increased heat-producing capacity at the sub-cellular level in winter. This previously unexplored the route of thermogenesis in birds should be addressed in future work.
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- author
- Nord, Andreas LU ; Metcalfe, Neil B. ; Page, Jennifer L. ; Huxtable, Anna ; McCafferty, Dominic J. and Dawson, Neal J.
- organization
- publishing date
- 2021
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- cellular metabolism, erythrocyte, overwintering, oxygen consumption, thermal biology
- in
- FASEB journal : official publication of the Federation of American Societies for Experimental Biology
- volume
- 35
- issue
- 5
- article number
- e21490
- publisher
- Wiley
- external identifiers
-
- scopus:85103995547
- pmid:33829547
- ISSN
- 1530-6860
- DOI
- 10.1096/fj.202100107R
- language
- English
- LU publication?
- yes
- id
- 11c53bd5-86aa-422f-8fe3-c64312b085aa
- date added to LUP
- 2021-04-20 11:31:41
- date last changed
- 2024-04-20 06:05:25
@article{11c53bd5-86aa-422f-8fe3-c64312b085aa,
abstract = {{<p>Endotherms in cold regions improve heat-producing capacity when preparing for winter. We know comparatively little about how this change is fueled by seasonal adaptation in cellular respiration. Thus, we studied the changes of mitochondrial function in red blood cells in sympatric Coal (Periparus ater), Blue (Cyanistes caeruleus), and Great (Parus major) tits between autumn and winter. These species differ more than twofold in body mass and in several aspects of their foraging ecology and social dominance, which could require differential seasonal adaptation of energy expenditure. Coal and Great tits in particular upregulated the mitochondrial respiration rate and mitochondrial volume in winter. This was not directed toward ATP synthesis, instead reflecting increased uncoupling of electron transport from ATP production. Because uncoupling is exothermic, this increased heat-producing capacity at the sub-cellular level in winter. This previously unexplored the route of thermogenesis in birds should be addressed in future work.</p>}},
author = {{Nord, Andreas and Metcalfe, Neil B. and Page, Jennifer L. and Huxtable, Anna and McCafferty, Dominic J. and Dawson, Neal J.}},
issn = {{1530-6860}},
keywords = {{cellular metabolism; erythrocyte; overwintering; oxygen consumption; thermal biology}},
language = {{eng}},
number = {{5}},
publisher = {{Wiley}},
series = {{FASEB journal : official publication of the Federation of American Societies for Experimental Biology}},
title = {{Avian red blood cell mitochondria produce more heat in winter than in autumn}},
url = {{http://dx.doi.org/10.1096/fj.202100107R}},
doi = {{10.1096/fj.202100107R}},
volume = {{35}},
year = {{2021}},
}