Effect of severe environmental thermal stress on redox state in salmon

Toshiki Nakano, Masumi Kameda, Yui Shoji, Satoshi Hayashi, Toshiyasu Yamaguchi, Minoru Sato

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)772-776
Number of pages5
JournalRedox Biology
Volume2
Issue number1
DOIs
Publication statusPublished - 2014

Keywords

  • Coho salmon
  • Fish
  • Heat shock
  • Oxidative stress
  • Redox state
  • Thermal stressor

ASJC Scopus subject areas

  • Organic Chemistry
  • Clinical Biochemistry

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