Functional, structural, and molecular remodelling of the goldfish (Carassius auratus) heart under moderate hypoxia.
Cardiac hemodynamics
Goldfish
Hypoxia
Mitochondria
Ventricular structure
Journal
Fish physiology and biochemistry
ISSN: 1573-5168
Titre abrégé: Fish Physiol Biochem
Pays: Netherlands
ID NLM: 100955049
Informations de publication
Date de publication:
10 Jan 2024
10 Jan 2024
Historique:
received:
24
07
2023
accepted:
01
01
2024
medline:
10
1
2024
pubmed:
10
1
2024
entrez:
10
1
2024
Statut:
aheadofprint
Résumé
The goldfish (Carassius auratus) is known for its physiologic ability to survive even long periods of oxygen limitation (hypoxia), adapting the cardiac performance to the requirements of peripheral tissue perfusion. We here investigated the effects of short-term moderate hypoxia on the heart, focusing on ventricular adaptation, in terms of hemodynamics and structural traits. Functional evaluations revealed that animals exposed to 4 days of environmental hypoxia increased the hemodynamic performance evaluated on ex vivo cardiac preparations. This was associated with a thicker and more vascularized ventricular compact layer and a reduced luminal lacunary space. Compared to normoxic animals, ventricular cardiomyocytes of goldfish exposed to hypoxia showed an extended mitochondrial compartment and a modulation of proteins involved in mitochondria dynamics. The enhanced expression of the pro-fission markers DRP1 and OMA1, and the modulation of the short and long forms of OPA1, suggested a hypoxia-related mitochondria fission. Our data propose that under hypoxia, the goldfish heart undergoes a structural remodelling associated with a potentiated cardiac activity. The energy demand for the highly performant myocardium is supported by an increased number of mitochondria, likely occurring through fission events.
Identifiants
pubmed: 38198074
doi: 10.1007/s10695-024-01297-7
pii: 10.1007/s10695-024-01297-7
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Subventions
Organisme : Ministero dell'Università e della Ricerca
ID : ex 60%
Organisme : Ministero dell'Università e della Ricerca
ID : ex 60%
Organisme : Ministero dell'Università e della Ricerca
ID : ex 60%
Organisme : Ministero dell'Università e della Ricerca
ID : ex 60%
Organisme : Ministero dell'Università e della Ricerca
ID : ex 60%
Informations de copyright
© 2024. The Author(s).
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