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Molecular characterization and biological functioning of interleukin-8 in Siberian sturgeon (Acipenser baeri)

文献类型： 外文期刊

作者： Wang, Xiaowen 1 ; Ma, Guoqing 1 ; Zhang, Rong 1 ; Liu, Lili 1 ; Zhu, Jianya 1 ; Zhu, Hua 1 ;

作者机构： 1.Beijing Fisheries Res Inst, Beijing 100068, Peoples R China

2.Beijing Key Lab Fishery Biotechnol, Beijing 100068, Peoples R China

3.Natl Freshwater Fisheries Engn Technol Res Ctr, Beijing 100068, Peoples R China

关键词： Interleukin-8 (IL-8); Siberian sturgeon (Acipenser baeri); Inflammatory response; Immunoregulation

期刊名称：FISH & SHELLFISH IMMUNOLOGY （ 影响因子：4.581； 五年影响因子：4.851 ）

ISSN： 1050-4648

年卷期： 2019 年 90 卷

页码：

收录情况： SCI

摘要： Interleukin-8, otherwise known as CXCL8, is a CXC chemokine that plays a pivotal regulatory role in immune and inflammation responses of animals. Here, we identified an interleukin-8 homologue from Siberian sturgeon (Acipenser baeri), named AbIL-8, which belongs to the lineage 1 group of teleost fish IL-8s. The cDNA of Abil-8 is 1130 bp in length, containing a 5'- untranslated region (UTR) of 50 bp, a 3'- UTR of 783 bp, and an open reading frame (ORF) of 297 bp that encodes a protein consisting of 98 amino acids. The deduced AbIL-8 contained five cysteines, four of which are highly conserved, and an ELR motif typical of known mammalian CXC chemokines was also found preceding the CXC motif. Our phylogenetic analysis showed that AbIL-8 clustered with the CXCL8_Ll sequences from other teleosts, being clearly distinct from those of either birds or mammals. Abil-8 mRNA was constitutively expressed in all tested tissues and significantly up-regulated in the liver and spleen tissues by the bacteria Aernomas hydrophila. The in vitro experiment using primary spleen cells stimulated with heat-killed Aemomas hydrophila or lipopolysaccharide (LPS) revealed a similar expression pattern to that found in vivo, whereas stimulation on spleen cells with beta-glucan or polyl:C elicited negligible changes in levels of Abil-8 mRNA. Purified recombinant AbIL 8 not only exhibited chemotactic activity for lymphocytes and monocytes in peripheral blood leukocytes (PBLs) and, to a lesser extent, spleen cells, but also stimulated the proliferation of spleen cells at 10 ng/mLor above. Furthermore, intraperitoneal injection of rAbIL-8 also up-regulated the expression of immuno-related genes (IL-6, IgM and MHCI1 beta) at 24 h. Collectively, these results enhance our understanding of how IL-8 functions in the regulation of the immune responses in sturgeon.

  • 相关文献

[1]Molecular characterization and biological functioning of interleukin-8 in Siberian sturgeon (Acipenser baeri). Wang, Xiaowen,Ma, Guoqing,Zhang, Rong,Liu, Lili,Zhu, Jianya,Zhu, Hua,Wang, Xiaowen,Ma, Guoqing,Zhang, Rong,Liu, Lili,Zhu, Jianya,Zhu, Hua,Wang, Xiaowen,Ma, Guoqing,Zhang, Rong,Liu, Lili,Zhu, Jianya,Zhu, Hua. 2019

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