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Carbonic anhydrase 2-like and Na+-K+-ATPase alpha gene expression in medaka (Oryzias latipes) under carbonate alkalinity stress

文献类型： 外文期刊

作者： Yao, Zongli 1 ; Lai, Qifang 1 ; Hao, Zhuoran 1 ; Chen, Ling 2 ; Lin, Tingting 1 ; Zhou, Kai 1 ; Wang, Hui 1 ;

作者机构： 1.Chinese Acad Fisheries Sci, East China Sea Fisheries Res Inst, Minist Agr China, Key Lab East China Sea & Ocean Fishery Resources, Shanghai 20090, Peoples R China

2.Tongji Univ, Coll Environm Sci & Engn, S

关键词： Carbonic anhydrase;Na+-K+-ATPase;Alkalinity stress;Oryzias latipes;Quantitative real-time PCR

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

ISSN：

年卷期：

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收录情况： SCI

摘要： High carbonate alkalinity is one of the major stress factors for living organisms in saline-alkaline water areas. Acute and chronic effects of carbonate alkalinity on expression of two genes, carbonic anhydrase 2-like (CA2-like) and Na+-K+-ATPase alpha subunit (NKA-alpha) mRNA in medaka (Oryzias latipes) were evaluated to better understand the responses important for coping with a carbonate alkalinity stress. In the acute exposure experiment, the expression of CA2-like and NKA-alpha mRNA in the gill and kidney of medaka were examined from 0 h to 7 days exposed to 30.4 mM carbonate alkalinity water. Exposure to high carbonate alkalinity resulted in a transitory alkalosis, followed by a transient increase in gill and kidney CA2-like and NKA-alpha mRNA expression. In the chronic exposure experiment, the expression of these two genes was examined in the gill and kidney at 50 days post-exposure to six different carbonate alkalinity concentrations ranging from 1.5 to 30.4 mM. Gill and kidney CA2-like mRNA levels in 30.4 mM were approximately 10 and 30 times higher than that of the control (1.5 mM), respectively. Less differences were found in NKA-alpha expression in the 50-days exposure. The results indicate that when transferred to high carbonate alkalinity water, a transitory alkalosis may occur in medaka, followed by compensatory acid-base and ion regulatory responses. Thus, CA2-like and NKA-alpha are at least two of the important factors that contribute to the regulation of alkalinity stress.

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