In vitro reactivity of ventral aorta to acetylcholine and noradrenaline in yellow freshwater eel (Anguilla anguilla L.) acclimatized to 10.1 MPa hydrostatic pressure.
International audience We examined in vitro vascular reactivity of eels previously acclimatized to 10.1 MPa hydrostatic pressure (HP) for 21 days. The isometric tension developed by ventral aortic rings was measured at atmospheric pressure. Dose-response curves for either acetylcholine (ACh) or nora...
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ftccsdartic:oai:HAL:hal-00743426v1 2023-05-15T13:28:01+02:00 In vitro reactivity of ventral aorta to acetylcholine and noradrenaline in yellow freshwater eel (Anguilla anguilla L.) acclimatized to 10.1 MPa hydrostatic pressure. Guerrero, F. Theron, M. Sebert, P. Optimisation des régulations physiologiques (ORPHY (EA 4324)) Institut Brestois Santé Agro Matière (IBSAM) Université de Brest (UBO)-Université de Brest (UBO)-Université de Brest (UBO)-Centre Hospitalier Régional Universitaire de Brest (CHRU Brest) 2000-11 https://hal.univ-brest.fr/hal-00743426 en eng HAL CCSD NRC Research Press info:eu-repo/semantics/altIdentifier/pmid/11100938 hal-00743426 https://hal.univ-brest.fr/hal-00743426 PUBMED: 11100938 ISSN: 0008-4212 EISSN: 1205-7541 Canadian Journal of Physiology and Pharmacology https://hal.univ-brest.fr/hal-00743426 Canadian Journal of Physiology and Pharmacology, NRC Research Press, 2000, 78 (11), pp.897-903 eel hyperbaric aorta acetylcholine noradrenaline MESH: Acclimatization MESH: Acetylcholine MESH: Vasoconstriction MESH: Animals MESH: Aorta MESH: Dose-Response Relationship Drug MESH: Eels MESH: Hydrostatic Pressure MESH: Muscle Smooth Vascular MESH: Norepinephrine MESH: Potassium [SDV.MHEP.PHY]Life Sciences [q-bio]/Human health and pathology/Tissues and Organs [q-bio.TO] info:eu-repo/semantics/article Journal articles 2000 ftccsdartic 2021-10-17T01:45:23Z International audience We examined in vitro vascular reactivity of eels previously acclimatized to 10.1 MPa hydrostatic pressure (HP) for 21 days. The isometric tension developed by ventral aortic rings was measured at atmospheric pressure. Dose-response curves for either acetylcholine (ACh) or noradrenaline (NA), as well as contractions evoked by 80 mM K+, were compared with time-matched experiments conducted on rings obtained from control eels. Results showed that neither the optimal tension nor the maximal force of the K+-evoked contraction were significantly modified, suggesting that acclimatization to high HP did not change the vascular smooth muscle contractile machinery. The dose-response curve to ACh was not significantly changed. Conversely, although NA always relaxed aortic rings, the response of acclimatized eels was significantly reduced over the entire range of the agonist concentration tested (10(-8) to 10(-3) M), except for the lowest one (10(-9) M). The maximal amplitude of the NA-induced relaxation was significantly reduced in aortic rings from acclimatized eels as compared with non-acclimatized samples (339.3 +/- 86.5 vs. 744.3 +/- 72.1 mg x mg(-1) dry weight, P < 0.005). Our results suggest that acclimatization to high HP could selectively alter the control of vascular tone by catecholamines. Article in Journal/Newspaper Anguilla anguilla Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
eel hyperbaric aorta acetylcholine noradrenaline MESH: Acclimatization MESH: Acetylcholine MESH: Vasoconstriction MESH: Animals MESH: Aorta MESH: Dose-Response Relationship Drug MESH: Eels MESH: Hydrostatic Pressure MESH: Muscle Smooth Vascular MESH: Norepinephrine MESH: Potassium [SDV.MHEP.PHY]Life Sciences [q-bio]/Human health and pathology/Tissues and Organs [q-bio.TO] |
spellingShingle |
eel hyperbaric aorta acetylcholine noradrenaline MESH: Acclimatization MESH: Acetylcholine MESH: Vasoconstriction MESH: Animals MESH: Aorta MESH: Dose-Response Relationship Drug MESH: Eels MESH: Hydrostatic Pressure MESH: Muscle Smooth Vascular MESH: Norepinephrine MESH: Potassium [SDV.MHEP.PHY]Life Sciences [q-bio]/Human health and pathology/Tissues and Organs [q-bio.TO] Guerrero, F. Theron, M. Sebert, P. In vitro reactivity of ventral aorta to acetylcholine and noradrenaline in yellow freshwater eel (Anguilla anguilla L.) acclimatized to 10.1 MPa hydrostatic pressure. |
topic_facet |
eel hyperbaric aorta acetylcholine noradrenaline MESH: Acclimatization MESH: Acetylcholine MESH: Vasoconstriction MESH: Animals MESH: Aorta MESH: Dose-Response Relationship Drug MESH: Eels MESH: Hydrostatic Pressure MESH: Muscle Smooth Vascular MESH: Norepinephrine MESH: Potassium [SDV.MHEP.PHY]Life Sciences [q-bio]/Human health and pathology/Tissues and Organs [q-bio.TO] |
description |
International audience We examined in vitro vascular reactivity of eels previously acclimatized to 10.1 MPa hydrostatic pressure (HP) for 21 days. The isometric tension developed by ventral aortic rings was measured at atmospheric pressure. Dose-response curves for either acetylcholine (ACh) or noradrenaline (NA), as well as contractions evoked by 80 mM K+, were compared with time-matched experiments conducted on rings obtained from control eels. Results showed that neither the optimal tension nor the maximal force of the K+-evoked contraction were significantly modified, suggesting that acclimatization to high HP did not change the vascular smooth muscle contractile machinery. The dose-response curve to ACh was not significantly changed. Conversely, although NA always relaxed aortic rings, the response of acclimatized eels was significantly reduced over the entire range of the agonist concentration tested (10(-8) to 10(-3) M), except for the lowest one (10(-9) M). The maximal amplitude of the NA-induced relaxation was significantly reduced in aortic rings from acclimatized eels as compared with non-acclimatized samples (339.3 +/- 86.5 vs. 744.3 +/- 72.1 mg x mg(-1) dry weight, P < 0.005). Our results suggest that acclimatization to high HP could selectively alter the control of vascular tone by catecholamines. |
author2 |
Optimisation des régulations physiologiques (ORPHY (EA 4324)) Institut Brestois Santé Agro Matière (IBSAM) Université de Brest (UBO)-Université de Brest (UBO)-Université de Brest (UBO)-Centre Hospitalier Régional Universitaire de Brest (CHRU Brest) |
format |
Article in Journal/Newspaper |
author |
Guerrero, F. Theron, M. Sebert, P. |
author_facet |
Guerrero, F. Theron, M. Sebert, P. |
author_sort |
Guerrero, F. |
title |
In vitro reactivity of ventral aorta to acetylcholine and noradrenaline in yellow freshwater eel (Anguilla anguilla L.) acclimatized to 10.1 MPa hydrostatic pressure. |
title_short |
In vitro reactivity of ventral aorta to acetylcholine and noradrenaline in yellow freshwater eel (Anguilla anguilla L.) acclimatized to 10.1 MPa hydrostatic pressure. |
title_full |
In vitro reactivity of ventral aorta to acetylcholine and noradrenaline in yellow freshwater eel (Anguilla anguilla L.) acclimatized to 10.1 MPa hydrostatic pressure. |
title_fullStr |
In vitro reactivity of ventral aorta to acetylcholine and noradrenaline in yellow freshwater eel (Anguilla anguilla L.) acclimatized to 10.1 MPa hydrostatic pressure. |
title_full_unstemmed |
In vitro reactivity of ventral aorta to acetylcholine and noradrenaline in yellow freshwater eel (Anguilla anguilla L.) acclimatized to 10.1 MPa hydrostatic pressure. |
title_sort |
in vitro reactivity of ventral aorta to acetylcholine and noradrenaline in yellow freshwater eel (anguilla anguilla l.) acclimatized to 10.1 mpa hydrostatic pressure. |
publisher |
HAL CCSD |
publishDate |
2000 |
url |
https://hal.univ-brest.fr/hal-00743426 |
genre |
Anguilla anguilla |
genre_facet |
Anguilla anguilla |
op_source |
ISSN: 0008-4212 EISSN: 1205-7541 Canadian Journal of Physiology and Pharmacology https://hal.univ-brest.fr/hal-00743426 Canadian Journal of Physiology and Pharmacology, NRC Research Press, 2000, 78 (11), pp.897-903 |
op_relation |
info:eu-repo/semantics/altIdentifier/pmid/11100938 hal-00743426 https://hal.univ-brest.fr/hal-00743426 PUBMED: 11100938 |
_version_ |
1766401725003988992 |