Molecular Biology Reports

, Volume 38, Issue 4, pp 2273–2279 | Cite as

Ikaros expression in tongue sole macrophages: a marker for lipopolysaccharide- and lipoteichoic acid-induced inflammatory responses



Ikaros, an important transcription factor plays a role in the development of hemato-lymphoid system, yet its functional importance in fish macrophages remains unknown. In this study, an Ikaros cDNA was cloned from the half-smooth tongue sole Cynoglossus semilaevis. The cDNA contained an open reading frame of 1,290 nucleotides that encoded a 430 amino acid protein. The deduced protein is structurally similar to dul from other species, for example human, axolotl, and possesses 3-zinc finger and 2-zinc finger domains at its N- and C-termini, respectively. Phylogenetic analysis revealed C. semilaevis Ikaros to be grouped with all the fish Ikaros, but branching from other Ikaros family members. Both semi-quantitative PCR and quantitative real-time PCR indicated Ikaros to be predominantly expressed in the immune-relevant tissues such as kidney, thymus, spleen and liver. In the macrophages cultured from C. semilaevis head kidney and challenged with lipopolysaccharide and lipoteichoic acid not only induced expression of the proinflammatory cytokines tumor necrosis factor-alpha and interleukin 1-beta but also caused up-regulation of Ikaros in a dose- and time-dependent fashions. All these data suggest that Ikaros might be a useful marker for inflammatory responses in C. semilaevis.


Sole Cynoglossus semilaevis Ikaros Macrophages Inflammation 



This work was supported by a grant (2008AA09Z409) of Ministry of Science and Technology (MOST) of China.

Supplementary material

11033_2010_358_MOESM1_ESM.doc (211 kb)
Supplementary material 1 (DOC 211 kb)


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© Springer Science+Business Media B.V. 2010

Authors and Affiliations

  1. 1.Department of Marine BiologyOcean University of ChinaQingdaoChina

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