The allometry of mitochondrial efficiency is tissue dependent: a comparison between skeletal and cardiac muscles of birds.
J Exp Biol
; 226(23)2023 12 01.
Article
em En
| MEDLINE
| ID: mdl-37921223
ABSTRACT
Body mass is known to be a fundamental driver of many biological traits, including metabolism. However, the effect of body mass on mitochondrial energy transduction is still poorly understood and has mainly been described in mammals. Using 13 species of birds ranging from 15â
g (finches) to 160â
kg (ostrich), we report here that the mitochondrial production of ATP, and the corresponding oxygen consumption, are negatively dependent on body mass in skeletal muscles but not in the heart. Results also showed that mitochondrial efficiency was positively correlated with body mass at sub-maximal phosphorylating states in the skeletal muscle, but not in the heart. This difference between muscle tissues is potentially linked to the difference in energetic demand expandability and the heavy involvement of skeletal muscle in thermoregulation.
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Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Aves
/
Mitocôndrias
Limite:
Animals
Idioma:
En
Revista:
J Exp Biol
Ano de publicação:
2023
Tipo de documento:
Article
País de afiliação:
França