Abstract:
:Chemokines are key regulators of migration and consequent activation of migrating leukocytes. CC chemokines constitute the largest chemokine group with 24-28 members in mammalian species, and even more in teleost fish, with up to 81 members in zebrafish Danio rerio. Further studies concerning fish chemokine genes will help elucidate the complexity of this chemokine group which has considerably expanded in some teleosts. In the current work, we have identified six novel CC chemokine genes within previously generated gilthead seabream (Sparus aurata) EST databases. The six novel chemokine sequences all show characteristic features of CC chemokines, such as the 4 conserved cysteine residues and a signal peptide. The nomenclature for chemokines in different fish species is not in concordance to mammalian nomenclature as it is difficult to establish true mammalian orthologs, and therefore a different nomenclature has been established for each fish species. In this work, we have named the seabream genes according to the rainbow trout CC chemokine with which they have the highest identity, therefore we have designated the novel seabream CC chemokines as CK1, CK3, CK5, CK7, CK8 and CK10. Expression analysis have also been performed with these new chemokines, as well as with the previously identified seabream chemokine designated as CCL4, which according to our proposed nomenclature should be renamed CK5B. In this sense, we have determined the pattern of constitutive chemokine expression in different seabream tissues. The effect that different immune non-replicative stimuli had in the levels of expression of the chemokines in head kidney leukocytes showed many strong suppressive effects in their transcription levels, and up-regulations mainly in response to mitogens. In vivo, however, when non-replicative virus or heat-killed bacteria were injected, the viral particles up-regulated chemokine expression in the spleen and not in head kidney. Finally, in the context of a real infection such as that of nodavirus in the brain, all the CC chemokines studied were significantly induced. This study constitutes a further step towards the elucidation of an immunological and/or physiological role for fish chemokines.
journal_name
Mol Immunoljournal_title
Molecular immunologyauthors
Cuesta A,Dios S,Figueras A,Novoa B,Esteban MA,Meseguer J,Tafalla Cdoi
10.1016/j.molimm.2009.12.014subject
Has Abstractpub_date
2010-03-01 00:00:00pages
1235-43issue
6eissn
0161-5890issn
1872-9142pii
S0161-5890(09)00887-6journal_volume
47pub_type
杂志文章abstract::Bacterial lipopolysaccharide (LPS) activates the innate immune system by forming a complex with myeloid differentiation factor 2 (MD-2) and Toll-like receptor 4 (TLR4), which is present on antigen presenting cells. MD-2 plays an essential role in this activation of the innate immune system as a member of the ternary c...
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pub_type: 杂志文章
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pub_type: 杂志文章
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journal_title:Molecular immunology
pub_type: 杂志文章
doi:10.1016/j.molimm.2007.01.023
更新日期:2007-05-01 00:00:00
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pub_type: 杂志文章
doi:10.1016/0161-5890(90)90044-z
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pub_type: 杂志文章
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pub_type: 杂志文章
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pub_type: 杂志文章
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pub_type: 临床试验,杂志文章
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pub_type: 杂志文章,评审
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pub_type: 历史文章,杂志文章,评审
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更新日期:2015-11-01 00:00:00
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pub_type: 杂志文章
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pub_type: 杂志文章
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更新日期:2020-03-01 00:00:00
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pub_type: 杂志文章
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