Difference between revisions of "Scott 2013 Abstract MiP2013"
Bader Helga (talk | contribs) |
|||
| Line 4: | Line 4: | ||
|authors=Scott GR, Mahalingam S, McClelland GB | |authors=Scott GR, Mahalingam S, McClelland GB | ||
|year=2013 | |year=2013 | ||
|event= | |event=MiPNet18.08_MiP2013 | ||
|abstract=The hypoxic and cold environment at high altitudes requires endothermic animals to sustain high rates of O2 consumption for both locomotion and thermogenesis while facing a diminished O2 supply. We are examining the mitochondrial mechanisms of genotypic adaptation and phenotypic plasticity that help maintain ATP supply during hypoxia in high-altitude birds and mammals. Respiratory capacity, cytochrome oxidase activity, phosphorylation efficiency, oxygen kinetics, and several other variables were measured in mitochondria isolated from the flight muscle of bar-headed geese and the hindlimb muscle of highland deer mice, and each were compared to closely-related lowland taxa. Our results suggest that several mitochondrial adaptations, coupled with enhanced mitochondrial O2 supply, contribute to performance in hypoxia. | |abstract=The hypoxic and cold environment at high altitudes requires endothermic animals to sustain high rates of O2 consumption for both locomotion and thermogenesis while facing a diminished O2 supply. We are examining the mitochondrial mechanisms of genotypic adaptation and phenotypic plasticity that help maintain ATP supply during hypoxia in high-altitude birds and mammals. Respiratory capacity, cytochrome oxidase activity, phosphorylation efficiency, oxygen kinetics, and several other variables were measured in mitochondria isolated from the flight muscle of bar-headed geese and the hindlimb muscle of highland deer mice, and each were compared to closely-related lowland taxa. Our results suggest that several mitochondrial adaptations, coupled with enhanced mitochondrial O2 supply, contribute to performance in hypoxia. | ||
|mipnetlab=CA Hamilton Scott GR | |mipnetlab=CA Hamilton Scott GR | ||
Revision as of 13:44, 9 June 2015
| Scott GR, Mahalingam S, McClelland GB(2013) Mitochondrial adaptations to hypoxia in high-altitude birds and mammals. Mitochondr Physiol Network 18.08. |
Link:
MiP2013, Book of Abstracts Open Access
Scott GR, Mahalingam S, McClelland GB (2013)
Event: MiPNet18.08_MiP2013
The hypoxic and cold environment at high altitudes requires endothermic animals to sustain high rates of O2 consumption for both locomotion and thermogenesis while facing a diminished O2 supply. We are examining the mitochondrial mechanisms of genotypic adaptation and phenotypic plasticity that help maintain ATP supply during hypoxia in high-altitude birds and mammals. Respiratory capacity, cytochrome oxidase activity, phosphorylation efficiency, oxygen kinetics, and several other variables were measured in mitochondria isolated from the flight muscle of bar-headed geese and the hindlimb muscle of highland deer mice, and each were compared to closely-related lowland taxa. Our results suggest that several mitochondrial adaptations, coupled with enhanced mitochondrial O2 supply, contribute to performance in hypoxia.
• O2k-Network Lab: CA Hamilton Scott GR
Labels: MiParea: Respiration, Comparative MiP;environmental MiP, Exercise physiology;nutrition;life style
Stress:Hypoxia Organism: Other mammals Tissue;cell: Skeletal muscle Preparation: Isolated mitochondria, Enzyme
Regulation: O2"O2" is not in the list (Aerobic glycolysis, ADP, ATP, ATP production, AMP, Calcium, Coupling efficiency;uncoupling, Cyt c, Flux control, Inhibitor, ...) of allowed values for the "Respiration and regulation" property. Coupling state: LEAK, OXPHOS
HRR: Oxygraph-2k
MiP2013
Affiliations and support
Department of Biology, McMaster University, Hamilton, Ontario, Canada
Email: [email protected]
Supported by NSERC of Canada.
