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The co-existence of two growth hormone receptors and their differential expression profiles between female and male tongue sole (Cynoglossus semilaevis)

文献类型: 外文期刊

作者: Ma, Qian 1 ; Liu, Shu-Fang 1 ; Zhuang, Zhi-Meng 1 ; Sun, Zhong-Zhi 1 ; Liu, Chang-Lin 1 ; Tang, Qi-Sheng 1 ;

作者机构: 1.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Qingdao 266071, Peoples R China

2.Xiamen Univ, Coll Oceanog & Environm Sci, Xiamen 361005, Peoples R China

关键词: Cloning;Cynoglossus semilaevis;Gene expression;Growth hormone receptor;Sexually dimorphic growth

期刊名称:GENE ( 影响因子:3.688; 五年影响因子:3.329 )

ISSN:

年卷期:

页码:

收录情况: SCI

摘要: Growth hormone receptor (Ghr) is a single-transmembrane pass protein which is important in initiating the ability of growth hormone (Gh) to regulate development and somatic growth in vertebrates. In this study, molecular cloning, expression analysis of two different ghr genes (ghr1 and ghr2) in the tongue sole (Cynoglossus semilaevis) was conducted. As a result, the ghr1 and ghr2 cDNA sequences are 2364. bp and 3125. bp, each of which encodes a transmembrane protein of 633 and 561 amino acids (aa), respectively. Besides, the ghr1 gene includes nine exons and eight introns. The sex-specific tissue expression was analyzed by using 14 tissues from females, normal males and extra-large male adults. Both the ghr1 and ghr2 were predominantly expressed in the liver, and the ghr1 expression level in normal males was 1.6 and 1.4 times as much as those in females and extra-large males, while the ghr2 mRNA expression level in normal males was 1.1 and 1.2 times as much as those in females and extra-large males, respectively. Ontogenetic expression analysis at early life stages indicated that the ghr1 and ghr2 mRNAs were detected at all of the 35 sampling points (from oosphere to 410. days-old). Furthermore, the sex differences in ghr mRNA expressions were also examined by using a full-sib family of C. semilaevis. Significantly higher levels of ghr1 mRNA were observed in males than in females at most stages of the sampling period (P<. 0.01). The ghr2 mRNA expression at most stages exhibited a significant sexual difference at each sampling point (P<. 0.01) without any variation trend related with the sexes during the whole sampling period.

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