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Molecular cloning and mRNA expression analysis of interleukin-8 gene in Japanese sea perch (Lateolabrax japonicus)

文献类型： 外文期刊

作者： Qiu, Lihua 1 ; Zhang, Hanhua 1 ; Yang, Keng 1 ; Jiang, Shigui 1 ;

作者机构： 1.Chinese Acad Fishery Sci, S China Sea Fisheries Res Inst, Biotechnol & Aquiculture Lab, Guangzhou 510300, Guangdong, Peoples R China

2.Chinese Acad Fishery Sci, Ctr Appl Aquat Genom, Beijing 100039, Peoples R China

期刊名称：MOLECULAR BIOLOGY REPORTS （ 影响因子：2.316； 五年影响因子：2.357 ）

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收录情况： SCI

摘要： Interleukin-8 (IL-8), the first known chemokine, is a CXC chemokine, which is cable of attracting neutrophils and inducing them to release lysozomal enzymes, triggering the respiratory burst. In the present study, the cDNA of an IL-8 was cloned from Japanese sea perch Lateolabrax japonicus (designated LjIL-8) by homology cloning and rapid amplification of cDNA ends (RACE) approaches. The full-length cDNA of LjIL-8 consisted of 803 nucleotides with a canonical polyadenylation signal sequence AATAAA and a poly(A) tail, and an open reading frame (ORF) of 300 bp encoding a polypeptide of 99 amino acid residues with a predicted molecular weight of 6.6 kDa. The high identity of LjIL-8 with IL-8 in other organisms indicated that LjIL-8 should be a new member of the IL-8 family. By fluorescent quantitative real-time PCR, mRNA transcript of LjIL-8 was detectable in all the examined tissues with higher level in spleen and head-kidney. The temporal expression of LjIL-8 mRNA in the spleen was up-regulated by lipopolyssacharide (LPS) stimulation and reached the maximum level at 6 h post-stimulation, and then dropped back to the original level gradually. These results indicated that LjIL-8 was a constitutive and inducible acute-phase protein that perhaps involved in the immune defense of L. japonicus.

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