2. Academic Validation
  3. Myo-inositol enhances the low-salinity tolerance of turbot (Scophthalmus maximus) by modulating cortisol synthesis

Myo-inositol enhances the low-salinity tolerance of turbot (Scophthalmus maximus) by modulating cortisol synthesis

  • Biochem Biophys Res Commun. 2020 Jun 11;526(4):913-919. doi: 10.1016/j.bbrc.2020.04.004.
Wenxiao Cui 1,  Aijun Ma 2,  Xinan Wang 3,  Zhihui Huang 3
Affiliations

Affiliations

  • 1 National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, 201306, China; Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shandong Key Laboratory of Marine Fisheries Biotechnology and Genetic Breeding, Qingdao Key Laboratory for Marine Fish Breeding and Biotechnology, Qingdao, 266071, China; Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology, Qingdao, 266071, China.
  • 2 Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shandong Key Laboratory of Marine Fisheries Biotechnology and Genetic Breeding, Qingdao Key Laboratory for Marine Fish Breeding and Biotechnology, Qingdao, 266071, China; Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology, Qingdao, 266071, China. Electronic address: [email protected].
  • 3 Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shandong Key Laboratory of Marine Fisheries Biotechnology and Genetic Breeding, Qingdao Key Laboratory for Marine Fish Breeding and Biotechnology, Qingdao, 266071, China; Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology, Qingdao, 266071, China.
PMID: 32279992 DOI: 10.1016/j.bbrc.2020.04.004
Abstract

Myo-inositol is a major intracellular osmolyte that can be accumulated to protect cells from a variety of stresses, including fluctuations in the osmolality of the environment, and cortisol is thought to be an osmotic hormone in teleost fish. In this study, dietary myo-inositol resulted in increased Na+-K+-ATPase activity and gene expression of partial ion channel genes and prolonged survival time of turbot (Scophthalmus maximus) under low salinity. The cortisol regulated by dietary myo-inositol also was correlated with these outcomes. The optimal concentrations of cortisol stimulated gill Na+-K+-ATPase activity and increased the expression of ion channel genes to enhance low salinity tolerance, as indicated by longer survival time under low salinity. When cortisol level was suppressed, myo-inositol failed to increase the survival time of turbot under low salinity, and strong correlations between cortisol concentration and Na+-K+-ATPase activity, expression of partial ion channel genes, and survival time of turbot were detected. These results showed that myo-inositol enhanced the low salinity tolerance of turbot by modulating cortisol synthesis.

Keywords

Cortisol; Low salinity; Osmoregulation; Turbot; myo-inositol.

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