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| Autores principales: | , , , , , , , , , |
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| Formato: | Artículo científico |
| Lenguaje: | en |
| Publicado: |
Comparative biochemistry and physiology. Toxicology & pharmacology : CBP
2026
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| Materias: | |
| Acceso en línea: | https://pubmed.ncbi.nlm.nih.gov/41861932/ |
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| _version_ | 1868266071844192256 |
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| author | Piva, Elisabetta Pacchini, Sara Kholdihaghighi, Shaghayegh Stoilova, Velizara Drago, Laura Baroni, Fabio Fogliano, Chiara Irato, Paola Schumann, Sophia Santovito, Gianfranco |
| author_facet | Piva, Elisabetta Pacchini, Sara Kholdihaghighi, Shaghayegh Stoilova, Velizara Drago, Laura Baroni, Fabio Fogliano, Chiara Irato, Paola Schumann, Sophia Santovito, Gianfranco Piva, Elisabetta Pacchini, Sara Kholdihaghighi, Shaghayegh Stoilova, Velizara Drago, Laura Baroni, Fabio Fogliano, Chiara Irato, Paola Schumann, Sophia Santovito, Gianfranco |
| collection | PubMed - marine biology |
| contents | Can Antarctic fish face marine heatwave-like events? Exploring cardiac physiology of Trematomus bernacchii using bio-loggers and stress biomarkers. Piva, Elisabetta Pacchini, Sara Kholdihaghighi, Shaghayegh Stoilova, Velizara Drago, Laura Baroni, Fabio Fogliano, Chiara Irato, Paola Schumann, Sophia Santovito, Gianfranco Animals Antarctic Regions Perciformes Biomarkers Glutathione Peroxidase Heart Fish Proteins Hot Temperature Heat-Shock Response Heart Rate Stress, Physiological Myocardium Body Temperature Rising seawater temperatures fundamentally reshape marine ecosystems, with the Southern Ocean exhibiting vulnerability to climatic perturbations. Antarctic teleosts have evolved under near-constant sub-zero conditions, developing unique physiological adaptations. In this study, responses of Trematomus bernacchii, an endemic Antarctic fish, to three successive marine heatwave-like events were addressed. Using implantable bio-loggers, core body temperature and heart rate were monitored over 15 days, revealing a statistically significant positive correlation between core body temperature and cardiac performance, with an approximately 25% increase per °C. Molecular analyses of cardiac tissue revealed a sequential antioxidant response. An early upregulation of gpx4 suggests immediate mitochondrial protection against lipid peroxidation, while the subsequent induction of gpx1, prdx3, and prdx5 indicates a broader cytosolic defence. Furthermore, the marked decoupling between elevated gpx1 transcript levels and diminished Selenium-dependent glutathione peroxidase activity highlights a hitherto unrecognised post-transcriptional regulatory mechanism under acute thermal stress. Our findings suggest that T. bernacchii activates a sequential, organ-specific stress response to short-term warming, which may allow it to overcome episodic heatwaves. |
| format | Artículo científico |
| id | pubmed_41861932 |
| institution | PubMed |
| language | en |
| publishDate | 2026 |
| publisher | Comparative biochemistry and physiology. Toxicology & pharmacology : CBP |
| record_format | pubmed |
| spellingShingle | Can Antarctic fish face marine heatwave-like events? Exploring cardiac physiology of Trematomus bernacchii using bio-loggers and stress biomarkers. Piva, Elisabetta Pacchini, Sara Kholdihaghighi, Shaghayegh Stoilova, Velizara Drago, Laura Baroni, Fabio Fogliano, Chiara Irato, Paola Schumann, Sophia Santovito, Gianfranco Animals Antarctic Regions Perciformes Biomarkers Glutathione Peroxidase Heart Fish Proteins Hot Temperature Heat-Shock Response Heart Rate Stress, Physiological Myocardium Body Temperature Can Antarctic fish face marine heatwave-like events? Exploring cardiac physiology of Trematomus bernacchii using bio-loggers and stress biomarkers. Piva, Elisabetta Pacchini, Sara Kholdihaghighi, Shaghayegh Stoilova, Velizara Drago, Laura Baroni, Fabio Fogliano, Chiara Irato, Paola Schumann, Sophia Santovito, Gianfranco Animals Antarctic Regions Perciformes Biomarkers Glutathione Peroxidase Heart Fish Proteins Hot Temperature Heat-Shock Response Heart Rate Stress, Physiological Myocardium Body Temperature Rising seawater temperatures fundamentally reshape marine ecosystems, with the Southern Ocean exhibiting vulnerability to climatic perturbations. Antarctic teleosts have evolved under near-constant sub-zero conditions, developing unique physiological adaptations. In this study, responses of Trematomus bernacchii, an endemic Antarctic fish, to three successive marine heatwave-like events were addressed. Using implantable bio-loggers, core body temperature and heart rate were monitored over 15 days, revealing a statistically significant positive correlation between core body temperature and cardiac performance, with an approximately 25% increase per °C. Molecular analyses of cardiac tissue revealed a sequential antioxidant response. An early upregulation of gpx4 suggests immediate mitochondrial protection against lipid peroxidation, while the subsequent induction of gpx1, prdx3, and prdx5 indicates a broader cytosolic defence. Furthermore, the marked decoupling between elevated gpx1 transcript levels and diminished Selenium-dependent glutathione peroxidase activity highlights a hitherto unrecognised post-transcriptional regulatory mechanism under acute thermal stress. Our findings suggest that T. bernacchii activates a sequential, organ-specific stress response to short-term warming, which may allow it to overcome episodic heatwaves. |
| title | Can Antarctic fish face marine heatwave-like events? Exploring cardiac physiology of Trematomus bernacchii using bio-loggers and stress biomarkers. |
| topic | Animals Antarctic Regions Perciformes Biomarkers Glutathione Peroxidase Heart Fish Proteins Hot Temperature Heat-Shock Response Heart Rate Stress, Physiological Myocardium Body Temperature |
| url | https://pubmed.ncbi.nlm.nih.gov/41861932/ |