| Records |
| Author |
Talbot, D.A.; Duchamp, C.; Rey, B.; Hanuise, N.; Rouanet, J.L.; Sibille, B.; Brand, M.D. |
Title  |
Uncoupling protein and ATP/ADP carrier increase mitochondrial proton conductance after cold adaptation of king penguins |
Type |
Journal Article |
| Year |
2004 |
Publication |
Journal of physiology-london |
Abbreviated Journal |
J. Physiol. (Lond.) |
| Volume |
558 |
Issue |
1 |
Pages |
123-135 |
| Keywords |
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| Abstract |
Juvenile king penguins develop adaptive thermogenesis after repeated immersion in cold water. However, the mechanisms of such metabolic adaptation in birds are unknown, as they lack brown adipose tissue and uncoupling protein-1 (UCP1), which mediate adaptive non-shivering thermogenesis in mammals. We used three different groups of juvenile king penguins to investigate the mitochondrial basis of avian adaptive thermogenesis . Skeletal muscle mitochondria isolated from penguins that had never been immersed in cold water showed no superoxide-stimulated proton conductance, indicating no functional avian UCP. Skeletal muscle mitochondria from penguins that had been either experimentally immersed or naturally adapted to cold water did possess functional avian UCP, demonstrated by a superoxide-stimulated, GDP-inhibitable proton conductance across their inner membrane. This was associated with a markedly greater abundance of avian UCP mRNA. In the presence (but not the absence) of fatty acids, these mitochondria also showed a greater adenine nucleotide translocase-catalysed proton conductance than those from never-immersed penguins. This was due to an increase in the amount of adenine nucleotide translocase. Therefore, adaptive thermogenesis in juvenile king penguins is linked to two separate mechanisms of uncoupling of oxidative phosphorylation in skeletal muscle mitochondria: increased proton transport activity of avian UCP (dependent on superoxide and inhibited by GDP) and increased proton transport activity of the adenine nucleotide translocase (dependent on fatty acids and inhibited by carboxyatractylate). |
| Programme |
131 |
| Campaign |
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| Address |
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| Corporate Author |
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Thesis |
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| Publisher |
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Place of Publication |
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Editor |
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Original Title |
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| Series Editor |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
0022-3751 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
10.1113/jphysiol.2004.063768 |
Approved |
yes |
| Call Number |
IPEV @ Thierry.Lemaire @ |
Serial |
5614 |
| Permanent link to this record |
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| Author |
Benjamin Rey, Claude Duchamp, Damien Roussel |
| Title |
Uncoupling effect of palmitate is exacerbated in skeletal muscle mitochondria of sea-acclimatized king penguins (Aptenodytes patagonicus) |
Type |
Journal |
| Year |
2017 |
Publication |
Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology |
Abbreviated Journal |
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| Volume |
211 |
Issue |
|
Pages |
56-60 |
| Keywords |
Bioenergetics Birds Free fatty acids Mitochondria Muscle |
| Abstract |
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. |
| Programme |
131 |
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Series Issue |
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Edition |
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| ISSN |
1095-6433 |
ISBN |
1095-6433 |
Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
7225 |
| Permanent link to this record |
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| Author |
Yann Tremblay, Yves Cherel, Marc Oremus, Torkild Tveraa and Olivier Chastel |
| Title |
Unconventional ventral attachment of time-depth recorders as a new method for investigating time budget and diving behaviour of seabirds. |
Type |
Journal Article |
| Year |
2003 |
Publication |
Journal of experimental biology |
Abbreviated Journal |
J. Exp. Biol. |
| Volume |
206 |
Issue |
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Pages |
1929-1940 |
| Keywords |
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| Abstract |
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| Programme |
109;330 |
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Series Issue |
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Edition |
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| ISSN |
0022-0949 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
4177 |
| Permanent link to this record |
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| Author |
Christopher S. Watson, Neil J. White, John A. Church, Matt A. King, Reed J. Burgette, Benoit Legresy |
| Title |
Unabated global mean sea-level rise over the satellite altimeter era |
Type |
Journal |
| Year |
2015 |
Publication |
Nature Climate Change |
Abbreviated Journal |
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| Volume |
5 |
Issue |
6 |
Pages |
565-568 |
| Keywords |
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| Abstract |
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| Programme |
688 |
| Campaign |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
1758-6798 |
ISBN |
1758-6798 |
Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
6842 |
| Permanent link to this record |
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| Author |
Christopher S. Watson, Neil J. White, John A. Church, Matt A. King, Reed J. Burgette, Benoit Legresy |
| Title |
Unabated global mean sea-level rise over the satellite altimeter era |
Type |
Journal |
| Year |
2015 |
Publication |
Nature Climate Change |
Abbreviated Journal |
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| Volume |
5 |
Issue |
6 |
Pages |
565-568 |
| Keywords |
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| Abstract |
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| Programme |
688 |
| Campaign |
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Edition |
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| ISSN |
1758-6798 |
ISBN |
1758-6798 |
Medium |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
7069 |
| Permanent link to this record |
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| Author |
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Type |
Master |
| Year |
2005 |
Publication |
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Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
24 |
| Keywords |
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| Abstract |
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| Programme |
136 |
| Campaign |
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Medium |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
2890 |
| Permanent link to this record |
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| Author |
Moreau M., Mercier D. & Laffly D. |
| Title |
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Type |
Journal Article |
| Year |
2004 |
Publication |
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Abbreviated Journal |
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| Volume |
2 |
Issue |
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Pages |
157-168 |
| Keywords |
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| Abstract |
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| Programme |
400 |
| Campaign |
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| Address |
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| Corporate Author |
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Thesis |
Bachelor's thesis |
| Publisher |
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Place of Publication |
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Editor |
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| Series Editor |
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Series Issue |
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Edition |
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| ISSN |
1266-5304 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
2797 |
| Permanent link to this record |
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| Author |
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Type |
Journal |
| Year |
2021 |
Publication |
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Abbreviated Journal |
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| Volume |
118 |
Issue |
2 |
Pages |
245-275 |
| Keywords |
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| Abstract |
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| Programme |
1217 |
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Approved |
yes |
| Call Number |
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Serial |
8690 |
| Permanent link to this record |
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| Author |
Yan Axel Gomez Coutouly |
| Title |
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Type |
Book Chapter |
| Year |
2021 |
Publication |
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Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
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| Keywords |
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| Abstract |
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| Programme |
1217 |
| Campaign |
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| Address |
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| Corporate Author |
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Thesis |
Bachelor's thesis |
| Publisher |
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Place of Publication |
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Medium |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
8692 |
| Permanent link to this record |
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| Author |
J.P. Braly |
| Title |
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Type |
Report |
| Year |
2008 |
Publication |
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Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
4090.htm |
| Keywords |
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| Abstract |
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| Programme |
1188 |
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Medium |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
5982 |
| Permanent link to this record |
