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      Molecular cloning and characterization of Toll-like receptor 14 in Japanese flounder, Paralichthys olivaceus.

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          Abstract

          Toll-like receptors (TLRs) are essential for activation of the innate immune system in response to invading pathogens. TLR14, which is unique to fish, has been identified in several fish species, but its function is unclear. In this study, Japanese flounder (Paralichthys olivaceus) TLR14 gene (JfTLR14) was cloned and its expression profiles were analyzed after infection with viral hemorrhagic septicemia virus, gram-positive Streptococcus iniae and gram-negative Edwardsiella tarda. The coding region of JfTLR14 cDNA was 2,607 bp, encoding 878 amino acid residues. JfTLR14 was highly expressed in head kidney of healthy flounder. In response to infection with VHSV and S. iniae, the JfTLR14 gene was up-regulated at only 1 day post-infection (dpi). However, E. tarda infection increased JfTLR14 gene expression from 1 to 6 dpi. These results imply that JfTLR14 participates more in the immune response against E. tarda infection than in the immune responses to other pathogen infections.

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          Author and article information

          Affiliations
          [1 ] Laboratory of Genome Science, Tokyo University of Marine Science and Technology, Konan 4-5-7, Minato-ku, Tokyo, 108-8477, Japan.
          Journal
          Fish Shellfish Immunol.
          Fish & shellfish immunology
          Elsevier BV
          1095-9947
          1050-4648
          Jan 2011
          : 30
          : 1
          20728538 S1050-4648(10)00258-5 10.1016/j.fsi.2010.08.005

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