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Effects of osmotic stress on Na+/K+-ATPase, caspase 3/7 activity, and the expression profiling of sirt1, hsf1, and hsp70 in the roughskin sculpin (Trachidermus fasciatus)

文献类型: 外文期刊

作者: Ma, Qian 1 ; Kuang, JieHua 1 ; Liu, Xinfu 2 ; Li, Ang 2 ; Feng, Wenrong 2 ; Zhuang, Zhimeng 2 ;

作者机构: 1.Guangdong Ocean Univ, Coll Fisheries, Zhanjiang 524088, Peoples R China

2.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Qingdao 266071, Shandong, Peoples R China

关键词: Trachidermus fasciatus; Sirtuin1; Heat shock factor 1; Heat shock protein 70; Na+; K+-ATPase; Caspase 3; 7; Salinity adaptation; Stress response

期刊名称:FISH PHYSIOLOGY AND BIOCHEMISTRY ( 影响因子:2.794; 五年影响因子:2.876 )

ISSN: 0920-1742

年卷期:

页码:

收录情况: SCI

摘要: Osmoregulation mechanism underlying acclimation of migratory fish to different salinities has been a classical research topic for decades. In this study, the roughskin sculpin (Trachidermus fasciatus) were subjected to two different acute osmotic treatments (one extreme acute and one acute treatment, i.e., E-acute and acute group). Comparisons of branchial enzyme activity, as well as the time-course expression profiling of sirt1, hsf1, and hsp70 were performed to reveal changes at the physiological and molecular levels. As a result, the branchial Na+/K+-ATPase activity was significantly inhibited and the caspase 3/7 relating to apoptosis was significantly induced in the E-acute group; no significant difference of branchial enzyme activity was detected in the acute group. These results suggested that T. fasciatus could keep stable physiological levels when experiencing the acute salinity change but not under extreme osmotic stress. Significant variations of sirt1, hsf1, and hsp70 expression were determined in the four target tissues (gill, intestine, kidney, and liver). Similar profiling was detected between the time-course expression of sirt1 and hsf1, suggesting their association in the osmoregulation process. Tissue-specific gene expression patterns in all the three target genes showed that each tissue possesses its own gene expression pattern in response to salinity changes. The overall different expression profiling of sirt1, hsf1, and hsp70 under the extreme acute and acute osmotic treatments might respectively represent the molecular regulation of stress response and acclimation. The findings make it possible to provide more reliable data to decipher the mechanism of osmoregulation in migratory fish.

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