Susceptibility to oxidative stress in Adélie and Emperor penguin
The antioxidant defences in aerobic organisms represent the detoxification pathway against toxicity of reactive oxygen species (ROS). These highly reactive molecules are normally produced during the 4-electrons reduction of molecular oxygen to water coupled with oxidative phosphorylation, and during...
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ftunivsiena:oai:usiena-air.unisi.it:11365/3019 2024-04-14T08:04:22+00:00 Susceptibility to oxidative stress in Adélie and Emperor penguin CORSOLINI, S. NIGRO, M. OLMASTRONI, S. FOCARDI, S. REGOLI, F. Corsolini, S. Nigro, M. Olmastroni, S. Focardi, S. Regoli, F. 2001 STAMPA http://hdl.handle.net/11365/3019 https://doi.org/10.1007/s003000000220 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000168622700010 volume:24 issue:5 firstpage:365 lastpage:368 numberofpages:4 journal:POLAR BIOLOGY http://hdl.handle.net/11365/3019 doi:10.1007/s003000000220 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-0035033223 info:eu-repo/semantics/closedAccess info:eu-repo/semantics/article 2001 ftunivsiena https://doi.org/10.1007/s003000000220 2024-03-21T15:55:33Z The antioxidant defences in aerobic organisms represent the detoxification pathway against toxicity of reactive oxygen species (ROS). These highly reactive molecules are normally produced during the 4-electrons reduction of molecular oxygen to water coupled with oxidative phosphorylation, and during the activity of several enzymatic systems which produce ROS as intermediates. However, the endogenous generation of oxyradicals may be influenced by different environmental and biological factors, and the basal efficiency of antioxidant systems generally reflects the normal prooxidant pressure to which organisms are exposed. If the antioxidant capacity is exceeded (i.e. as a consequence of enhanced intracellular formation of ROS), a pathological condition, generally termed oxidative stress, may arise. In this preliminary work, susceptibility to oxidative stress has been compared in plasma of Adélie penguin (Pygoscelis adeliae), emperor penguin (Aptenodytes forsteri), south polar skua (Catharacta maccormicki) and snow petrel (Pagodroma nivea). Within the framework of the Italian Research Program in Antarctica, blood samples were collected during the austral summer 1998-1999 and the Total Oxyradical Scavenging Capacity (TOSC) analysed. The TOSC assay, measuring the capability of biological samples to neutralise different oxyradicals, has been recently standardised to provide a quantifiable value of biological resistance to toxicity of ROS. Penguins exhibited higher scavenging capacity towards peroxyl radicals than south polar skua and snow petrel. The greater resistance to toxicity of oxyradicals might suggest that penguins are naturally exposed to a higher basal prooxidant pressure in comparison to other analysed Antarctic birds. Article in Journal/Newspaper Antarc* Antarctic Antarctica Aptenodytes forsteri Catharacta maccormicki Pygoscelis adeliae Snow Petrel Università degli Studi di Siena: USiena air Antarctic Austral Nivea ENVELOPE(-45.479,-45.479,-60.580,-60.580) Polar Biology 24 5 365 368 |
institution |
Open Polar |
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Università degli Studi di Siena: USiena air |
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ftunivsiena |
language |
English |
description |
The antioxidant defences in aerobic organisms represent the detoxification pathway against toxicity of reactive oxygen species (ROS). These highly reactive molecules are normally produced during the 4-electrons reduction of molecular oxygen to water coupled with oxidative phosphorylation, and during the activity of several enzymatic systems which produce ROS as intermediates. However, the endogenous generation of oxyradicals may be influenced by different environmental and biological factors, and the basal efficiency of antioxidant systems generally reflects the normal prooxidant pressure to which organisms are exposed. If the antioxidant capacity is exceeded (i.e. as a consequence of enhanced intracellular formation of ROS), a pathological condition, generally termed oxidative stress, may arise. In this preliminary work, susceptibility to oxidative stress has been compared in plasma of Adélie penguin (Pygoscelis adeliae), emperor penguin (Aptenodytes forsteri), south polar skua (Catharacta maccormicki) and snow petrel (Pagodroma nivea). Within the framework of the Italian Research Program in Antarctica, blood samples were collected during the austral summer 1998-1999 and the Total Oxyradical Scavenging Capacity (TOSC) analysed. The TOSC assay, measuring the capability of biological samples to neutralise different oxyradicals, has been recently standardised to provide a quantifiable value of biological resistance to toxicity of ROS. Penguins exhibited higher scavenging capacity towards peroxyl radicals than south polar skua and snow petrel. The greater resistance to toxicity of oxyradicals might suggest that penguins are naturally exposed to a higher basal prooxidant pressure in comparison to other analysed Antarctic birds. |
author2 |
Corsolini, S. Nigro, M. Olmastroni, S. Focardi, S. Regoli, F. |
format |
Article in Journal/Newspaper |
author |
CORSOLINI, S. NIGRO, M. OLMASTRONI, S. FOCARDI, S. REGOLI, F. |
spellingShingle |
CORSOLINI, S. NIGRO, M. OLMASTRONI, S. FOCARDI, S. REGOLI, F. Susceptibility to oxidative stress in Adélie and Emperor penguin |
author_facet |
CORSOLINI, S. NIGRO, M. OLMASTRONI, S. FOCARDI, S. REGOLI, F. |
author_sort |
CORSOLINI, S. |
title |
Susceptibility to oxidative stress in Adélie and Emperor penguin |
title_short |
Susceptibility to oxidative stress in Adélie and Emperor penguin |
title_full |
Susceptibility to oxidative stress in Adélie and Emperor penguin |
title_fullStr |
Susceptibility to oxidative stress in Adélie and Emperor penguin |
title_full_unstemmed |
Susceptibility to oxidative stress in Adélie and Emperor penguin |
title_sort |
susceptibility to oxidative stress in adélie and emperor penguin |
publishDate |
2001 |
url |
http://hdl.handle.net/11365/3019 https://doi.org/10.1007/s003000000220 |
long_lat |
ENVELOPE(-45.479,-45.479,-60.580,-60.580) |
geographic |
Antarctic Austral Nivea |
geographic_facet |
Antarctic Austral Nivea |
genre |
Antarc* Antarctic Antarctica Aptenodytes forsteri Catharacta maccormicki Pygoscelis adeliae Snow Petrel |
genre_facet |
Antarc* Antarctic Antarctica Aptenodytes forsteri Catharacta maccormicki Pygoscelis adeliae Snow Petrel |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000168622700010 volume:24 issue:5 firstpage:365 lastpage:368 numberofpages:4 journal:POLAR BIOLOGY http://hdl.handle.net/11365/3019 doi:10.1007/s003000000220 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-0035033223 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1007/s003000000220 |
container_title |
Polar Biology |
container_volume |
24 |
container_issue |
5 |
container_start_page |
365 |
op_container_end_page |
368 |
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1796300862091427840 |