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Molecular and expression characterization of two somatostatin genes in the Chinese sturgeon, Acipenser sinensis

文献类型： 外文期刊

作者： Li, Chuang-Ju 1 ; Wei, Qi-Wei 1 ; Zhou, Li 2 ; Cao, Hong 4 ; Zhang, Yan 1 ; Gui, Jian-Fang 2 ;

作者机构： 1.Chinese Acad Fisheries Sci, Yangtze River Fisheries Res Inst, Minist Agr China, Key Lab Freshwater Biodivers Conservat & Utilizat, Jinzhou 434000, Peoples R China

2.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China

3.Chinese Acad Fisheries Sci, Freshwater Fisheries Res Ctr, Wuxi 214081, Peoples R China

4.Wuhan Univ, Coll Life Sci, Wuhan 430072, Peoples R

关键词： Chinese sturgeon;Evolution;Gene expression;Somatostatin

期刊名称：COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY A-MOLECULAR & INTEGRATIVE PHYSIOLOGY （ 影响因子：2.32； 五年影响因子：2.465 ）

ISSN： 1095-6433

年卷期： 2009 年 154 卷 1 期

页码：

收录情况： SCI

摘要： Chinese sturgeon (Acipenser sinensis) is a rare and endangered species and also an important resource for the sturgeon aquaculture industry. SMART cDNA was synthesized from the hypothalamus of Chinese sturgeon, and the full-length cDNAs of two somatostatin (SS) genes were cloned and sequenced. The first cDNA (AsSS1) encodes a 116-amino acid protein that contains the SS(14) sequence at its C-terminal extremity. AsSS1 shows high identity to that of human and other vertebrates. The second cDNA (AsSS2) encodes a 111-amino acid protein that contains the somatostatin variant [Pro(2)]-SS(14) at its C-terminal extremity. Both the two SS mRNAs were expressed in brain and pituitary with different mRNA levels. But in peripheral tissues, AsSS2 was more widely distributed than AsSS1. High mRNA levels of AsSS2 were found in liver, kidney and heart, while low mRNA levels of AsSS2 were also detected in ovary. Throughout embryogenesis and early larval development only AsSS2 mRNAs were detected. Furthermore, in the hypothalamus of one to five year-old Chinese sturgeon, AsSS2 but not AsSS1 maintained stable expression. The mRNA distribution suggests that the Chinese sturgeon AsSS2 products play important physiological functions in adult fish as well as in cell growth and organ differentiation in embryo and larva development. (C) 2009 Elsevier Inc. All rights reserved.

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