Check out my profile on Research Gate and on Google Scholar or explore my full publication list below. Most papers are available online through the public repository at HAL CNRS
2022
2.
Yann Voituron; Damien Roussel; Jean-François Le Galliard; Andréaz Dupoué; Caroline Romestaing; Sandrine Meylan
Mitochondrial oxidative phosphorylation response overrides glucocorticoid-induced stress in a reptile Journal Article
In: Journal of Comparative Physiology B, 2022, ISSN: 1432-136X.
Abstract | Links | BibTeX | Tags: corticosterone, metabolism
@article{voituron_mitochondrial_2022,
title = {Mitochondrial oxidative phosphorylation response overrides glucocorticoid-induced stress in a reptile},
author = {Yann Voituron and Damien Roussel and Jean-François Le Galliard and Andréaz Dupoué and Caroline Romestaing and Sandrine Meylan},
url = {https://doi.org/10.1007/s00360-022-01454-5},
doi = {10.1007/s00360-022-01454-5},
issn = {1432-136X},
year = {2022},
date = {2022-08-01},
urldate = {2022-08-16},
journal = {Journal of Comparative Physiology B},
abstract = {Stress hormones and their impacts on whole organism metabolic rates are usually considered as appropriate proxies for animal energy budget that is the foundation of numerous concepts and models aiming at predicting individual and population responses to environmental stress. However, the dynamics of energy re-allocation under stress make the link between metabolism and corticosterone complex and still unclear. Using ectopic application of corticosterone for 3, 11 and 21 days, we estimated a time effect of stress in a lizard (Zootoca vivipara). We then investigated whole organism metabolism, muscle cellular O2 consumption and liver mitochondrial oxidative phosphorylation processes (O2 consumption and ATP production) and ROS production. The data showed that while skeletal muscle is not impacted, stress regulates the liver mitochondrial functionality in a time-dependent manner with opposing pictures between the different time expositions to corticosterone. While 3 days exposition is characterized by lower ATP synthesis rate and high H2O2 release with no change in the rate of oxygen consumption, the 11 days exposition reduced all three fluxes of about 50%. Oxidative phosphorylation capacities in liver mitochondria of lizard treated with corticosterone for 21 days was similar to the hepatic mitochondrial capacities in lizards that received no corticosterone treatment but with 40% decrease in H2O2 production. This new mitochondrial functioning allows a better capacity to respond to the energetic demands imposed by the environment but do not influence whole organism metabolism. In conclusion, global mitochondrial functioning has to be considered to better understand the proximal causes of the energy budget under stressful periods.},
keywords = {corticosterone, metabolism},
pubstate = {published},
tppubtype = {article}
}
Stress hormones and their impacts on whole organism metabolic rates are usually considered as appropriate proxies for animal energy budget that is the foundation of numerous concepts and models aiming at predicting individual and population responses to environmental stress. However, the dynamics of energy re-allocation under stress make the link between metabolism and corticosterone complex and still unclear. Using ectopic application of corticosterone for 3, 11 and 21 days, we estimated a time effect of stress in a lizard (Zootoca vivipara). We then investigated whole organism metabolism, muscle cellular O2 consumption and liver mitochondrial oxidative phosphorylation processes (O2 consumption and ATP production) and ROS production. The data showed that while skeletal muscle is not impacted, stress regulates the liver mitochondrial functionality in a time-dependent manner with opposing pictures between the different time expositions to corticosterone. While 3 days exposition is characterized by lower ATP synthesis rate and high H2O2 release with no change in the rate of oxygen consumption, the 11 days exposition reduced all three fluxes of about 50%. Oxidative phosphorylation capacities in liver mitochondria of lizard treated with corticosterone for 21 days was similar to the hepatic mitochondrial capacities in lizards that received no corticosterone treatment but with 40% decrease in H2O2 production. This new mitochondrial functioning allows a better capacity to respond to the energetic demands imposed by the environment but do not influence whole organism metabolism. In conclusion, global mitochondrial functioning has to be considered to better understand the proximal causes of the energy budget under stressful periods.
2018
1.
Andréaz Dupoué; Jean-François Le Galliard; Rémy Josserand; Dale F DeNardo; Béatriz Decencière; Simon Agostini; Claudy Haussy; Sandrine Meylan
Water restriction causes an intergenerational trade-off and delayed mother–offspring conflict in a viviparous lizard Journal Article
In: Functional ecology, vol. 32, no. 3, pp. 676–686, 2018.
Links | BibTeX | Tags: corticosterone, dehydration, reproduction, survival, trade-off
@article{dupoue_water_2018,
title = {Water restriction causes an intergenerational trade-off and delayed mother–offspring conflict in a viviparous lizard},
author = {Andréaz Dupoué and Jean-François Le Galliard and Rémy Josserand and Dale F DeNardo and Béatriz Decencière and Simon Agostini and Claudy Haussy and Sandrine Meylan},
url = {https://besjournals.onlinelibrary.wiley.com/doi/full/10.1111/1365-2435.13009},
doi = {https://doi.org/10.1111/1365-2435.13009},
year = {2018},
date = {2018-01-01},
journal = {Functional ecology},
volume = {32},
number = {3},
pages = {676--686},
keywords = {corticosterone, dehydration, reproduction, survival, trade-off},
pubstate = {published},
tppubtype = {article}
}