Effect of severe environmental thermal stress on redox state in salmon

Fish are exposed to many kinds of environmental stressors and the chances of succumbing to infectious diseases may be increased a result. For example, an acute increase in temperature can induce numerous physiological changes in the body. In the present study, we examined the redox state in response...

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Bibliographic Details
Published in:Redox biology 2014, Vol.2 (C), p.772-776
Main Authors: Nakano, Toshiki, Kameda, Masumi, Shoji, Yui, Hayashi, Satoshi, Yamaguchi, Toshiyasu, Sato, Minoru
Format: Article
Language:English
Subjects:
Animals
Blood Glucose - analysis
Coho salmon
Fish
Glutathione - blood
Heat shock
HSP70 Heat-Shock Proteins - metabolism
Hydrocortisone - blood
Lipid Peroxides - blood
Oncorhynchus kisutch - metabolism
Oxidative Stress
Redox state
Research Paper
Stress, Physiological
Superoxide Dismutase - blood
Temperature
Thermal stressor
Time Factors
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Summary:Fish are exposed to many kinds of environmental stressors and the chances of succumbing to infectious diseases may be increased a result. For example, an acute increase in temperature can induce numerous physiological changes in the body. In the present study, we examined the redox state in response to a severe acute stress resulting from heat shock in teleost coho salmon (Oncorhynchus kisutch). The plasma lipid peroxides levels in fish gradually increased after heat shock treatment. By 2.5 h post-heat stress, plasma glutathione (GSH) levels had decreased, but they had returned to basal levels by 17.5 h post-stress. Plasma superoxide dismutase activities in stressed fish were significantly increased compared with those in control fish at 17.5 h post-stress, but had returned to basal levels by 48 h post-stress. Expression levels of hepatic GSH and heat shock protein 70 gradually increased after heat shock treatment. These results concerning the changing patterns of multiple important redox-related biomarkers suggest that severe thermal stressors can affect the redox state and induce oxidative stress in ectothermal animals, such as fish, in vivo. Hence, manipulation of appropriate thermal treatment may possibly be useful to control fish fitness.
ISSN:2213-2317
2213-2317
DOI:10.1016/j.redox.2014.05.007