Uncoupling effect of palmitate is exacerbated in skeletal muscle mitochondria of sea-acclimatized king penguins (Aptenodytes patagonicus)
International audience In king penguin juveniles, the environmental transition from a terrestrial to a marine habitat, occurring at fledging, drastically stimulates lipid catabolism and the remodelling of muscle mitochondria to sustain extensive swimming activity and thermoregulation in the cold cir...
Published in: | Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology |
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Online Access: | https://sde.hal.science/hal-01548837 https://doi.org/10.1016/j.cbpa.2017.06.009 |
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ftunivlyon:oai:HAL:hal-01548837v1 2024-06-23T07:54:23+00:00 Uncoupling effect of palmitate is exacerbated in skeletal muscle mitochondria of sea-acclimatized king penguins (Aptenodytes patagonicus) Rey, Benjamin Duchamp, Claude, H. B. Roussel, Damien Laboratoire de Biométrie et Biologie Evolutive - UMR 5558 (LBBE) Université Claude Bernard Lyon 1 (UCBL) Université de Lyon-Université de Lyon-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS) Laboratoire d'Ecologie des Hydrosystèmes Naturels et Anthropisés (LEHNA) Université de Lyon-Université de Lyon-École Nationale des Travaux Publics de l'État (ENTPE)-Centre National de la Recherche Scientifique (CNRS) 2017 https://sde.hal.science/hal-01548837 https://doi.org/10.1016/j.cbpa.2017.06.009 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.cbpa.2017.06.009 hal-01548837 https://sde.hal.science/hal-01548837 doi:10.1016/j.cbpa.2017.06.009 ISSN: 1095-6433 Comparative Biochemistry and Physiology - Part A: Molecular and Integrative Physiology https://sde.hal.science/hal-01548837 Comparative Biochemistry and Physiology - Part A: Molecular and Integrative Physiology, 2017, 211, pp.56-60. ⟨10.1016/j.cbpa.2017.06.009⟩ Bioenergetics Free fatty acids Mitochondria Birds Muscle [SDE.BE]Environmental Sciences/Biodiversity and Ecology info:eu-repo/semantics/article Journal articles 2017 ftunivlyon https://doi.org/10.1016/j.cbpa.2017.06.009 2024-05-27T14:52:07Z International audience In king penguin juveniles, the environmental transition from a terrestrial to a marine habitat, occurring at fledging, drastically stimulates lipid catabolism and the remodelling of muscle mitochondria to sustain extensive swimming activity and thermoregulation in the cold circumpolar oceans. However, the exact nature of these mechanisms remains only partially resolved. Here we investigated, in vitro, the uncoupling effect of increasing doses of fatty acids in pectoralis muscle intermyofibrillar mitochondria isolated, either from terrestrial never-immersed or experimentally cold water immersed pre-fledging king penguins or from sea-acclimatized fledged penguins. Mitochondria exhibited much greater palmitate-induced uncoupling respiration and higher maximal oxidative capacity after acclimatization to marine life. Such effects were not reproduced experimentally after repeated immersions in cold water, suggesting that the plasticity of mitochondrial characteristics may not be primarily driven by cold exposure per se but by other aspects of sea acclimatization.Keywords Article in Journal/Newspaper King Penguins Université de Lyon: HAL Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology 211 56 60 |
institution |
Open Polar |
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Université de Lyon: HAL |
op_collection_id |
ftunivlyon |
language |
English |
topic |
Bioenergetics Free fatty acids Mitochondria Birds Muscle [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
spellingShingle |
Bioenergetics Free fatty acids Mitochondria Birds Muscle [SDE.BE]Environmental Sciences/Biodiversity and Ecology Rey, Benjamin Duchamp, Claude, H. B. Roussel, Damien Uncoupling effect of palmitate is exacerbated in skeletal muscle mitochondria of sea-acclimatized king penguins (Aptenodytes patagonicus) |
topic_facet |
Bioenergetics Free fatty acids Mitochondria Birds Muscle [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
description |
International audience In king penguin juveniles, the environmental transition from a terrestrial to a marine habitat, occurring at fledging, drastically stimulates lipid catabolism and the remodelling of muscle mitochondria to sustain extensive swimming activity and thermoregulation in the cold circumpolar oceans. However, the exact nature of these mechanisms remains only partially resolved. Here we investigated, in vitro, the uncoupling effect of increasing doses of fatty acids in pectoralis muscle intermyofibrillar mitochondria isolated, either from terrestrial never-immersed or experimentally cold water immersed pre-fledging king penguins or from sea-acclimatized fledged penguins. Mitochondria exhibited much greater palmitate-induced uncoupling respiration and higher maximal oxidative capacity after acclimatization to marine life. Such effects were not reproduced experimentally after repeated immersions in cold water, suggesting that the plasticity of mitochondrial characteristics may not be primarily driven by cold exposure per se but by other aspects of sea acclimatization.Keywords |
author2 |
Laboratoire de Biométrie et Biologie Evolutive - UMR 5558 (LBBE) Université Claude Bernard Lyon 1 (UCBL) Université de Lyon-Université de Lyon-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS) Laboratoire d'Ecologie des Hydrosystèmes Naturels et Anthropisés (LEHNA) Université de Lyon-Université de Lyon-École Nationale des Travaux Publics de l'État (ENTPE)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Rey, Benjamin Duchamp, Claude, H. B. Roussel, Damien |
author_facet |
Rey, Benjamin Duchamp, Claude, H. B. Roussel, Damien |
author_sort |
Rey, Benjamin |
title |
Uncoupling effect of palmitate is exacerbated in skeletal muscle mitochondria of sea-acclimatized king penguins (Aptenodytes patagonicus) |
title_short |
Uncoupling effect of palmitate is exacerbated in skeletal muscle mitochondria of sea-acclimatized king penguins (Aptenodytes patagonicus) |
title_full |
Uncoupling effect of palmitate is exacerbated in skeletal muscle mitochondria of sea-acclimatized king penguins (Aptenodytes patagonicus) |
title_fullStr |
Uncoupling effect of palmitate is exacerbated in skeletal muscle mitochondria of sea-acclimatized king penguins (Aptenodytes patagonicus) |
title_full_unstemmed |
Uncoupling effect of palmitate is exacerbated in skeletal muscle mitochondria of sea-acclimatized king penguins (Aptenodytes patagonicus) |
title_sort |
uncoupling effect of palmitate is exacerbated in skeletal muscle mitochondria of sea-acclimatized king penguins (aptenodytes patagonicus) |
publisher |
HAL CCSD |
publishDate |
2017 |
url |
https://sde.hal.science/hal-01548837 https://doi.org/10.1016/j.cbpa.2017.06.009 |
genre |
King Penguins |
genre_facet |
King Penguins |
op_source |
ISSN: 1095-6433 Comparative Biochemistry and Physiology - Part A: Molecular and Integrative Physiology https://sde.hal.science/hal-01548837 Comparative Biochemistry and Physiology - Part A: Molecular and Integrative Physiology, 2017, 211, pp.56-60. ⟨10.1016/j.cbpa.2017.06.009⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.cbpa.2017.06.009 hal-01548837 https://sde.hal.science/hal-01548837 doi:10.1016/j.cbpa.2017.06.009 |
op_doi |
https://doi.org/10.1016/j.cbpa.2017.06.009 |
container_title |
Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology |
container_volume |
211 |
container_start_page |
56 |
op_container_end_page |
60 |
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1802646527873646592 |