NDLI: Revisiting redox-active antioxidant defenses in response to hypoxic challenge in both hypoxia-tolerant and hypoxia-sensitive fish species.

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Revisiting redox-active antioxidant defenses in response to hypoxic challenge in both hypoxia-tolerant and hypoxia-sensitive fish species.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Leveelahti, Lotta Rytkönen, Kalle T. Renshaw, Gillian M. C. Nikinmaa, Mikko
Description	Author Affiliation: Leveelahti L ( Laboratory of Animal Physiology, Department of Biology, University of Turku, 20014, Turku, Finland, lotlev@utu.fi.)
Abstract	It is not known whether changes in antioxidant levels always occur in fish in response to the oxidative stress that usually accompanies a hypoxic challenge. The studies of antioxidant responses to hypoxia in fish have mostly focused on very anoxia-tolerant species and indicate that there is an enhancement of antioxidant defenses. Here we present new data on redox-active antioxidants from three species, which range in their tolerance to hypoxia: the epaulette shark, threespine stickleback, and rainbow trout, together with a compilation of results from other studies that have measured oxidative stress parameters in hypoxia-exposed fish. The results suggest that in general, fish do not show an increase in redox-active antioxidant defense in response to oxidative stress associated with hypoxia. Rather, the changes in antioxidant defenses during hypoxia are very much species- and tissue-specific and are not linked to the level of hypoxia tolerance of the fish species.
File Format	HTM / HTML
ISSN	09201742
Issue Number	1
Volume Number	40
e-ISSN	15735168
Journal	Fish Physiology and Biochemistry
Language	English
Publisher	Springer
Publisher Date	2014-02-01
Publisher Place	Netherlands
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Physiology Discipline Biochemistry Discipline Zoology Antioxidants Metabolism Anoxia Oncorhynchus Mykiss Sharks Smegmamorpha Animals Catalase Glucosephosphate Dehydrogenase Glutathione Peroxidase Glutathione Reductase Glutathione Transferase Enzymology Oxidation-reduction Random Allocation Superoxide Dismutase Comparative Study Journal Article
Content Type	Text
Resource Type	Article
Subject	Physiology Medicine Biochemistry Aquatic Science

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