Molecular cloning, characterization and evolutionary analysis of leptin gene in Chinese giant salamander, Andrias davidianus

文献类型： 外文期刊

第一作者： Xiao, Han-bing

作者： Xiao, Han-bing;Tian, Hai-feng;Hu, Qiao-mu;Meng, Yan

作者机构：

关键词： Leptin (Lep); tissue expression; evolution; leptin signaling pathways; Andrias davidianus

期刊名称：OPEN LIFE SCIENCES （ 影响因子：0.938； 五年影响因子：1.154 ）

ISSN： 2391-5412

年卷期： 2017 年 12 卷 1 期

页码：

收录情况： SCI

摘要： Leptin is an important hormone possessing diverse physiological roles in mammals and teleosts. However, it has been characterized only in a few amphibian species, and its evolutions are still under debate. Here, the full length of the leptin (Adlep) cDNA of Chinese giant salamander (Andrias davidianus), an early diverging amphibian species, is characterized and according to the results of the primary sequence analysis, tertiary structure reconstruction and phylogenetic analysis is confirmed to be an ortholog of mammalian leptin. An intron was identified between the coding exons of A. davidianus leptin, which indicated that the leptin is present in the salamander genome and contains a conserved gene structure in vertebrates. Adlep is widely distributed but expression levels vary among different tissues, with highest expression levels in the muscle. Additionally, the leptin receptor and other genes were mapped to three known leptin signaling pathways, suggesting that the leptin signaling pathways are present in A. davidianus. Phylogenetic topology of leptins are consistent with the generally accepted evolutionary relationships of vertebrates, and multiple leptin members found in teleosts seem to be obtained through a Cluopeocephala-specific gene duplication event. Our results will lay a foundation for further investigations into the physiological roles of leptin in A. davidianus.

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