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- W2093400261 abstract "The polarization of naïve CD4+ T cells to T helper (Th)1 or Th2 cells is specified by two master transcription factors, T-bet and GATA3, and is an essential feature of mammalian adaptive immune responses to pathogens and the development of long-lasting immunity. We report here the cloning of rainbow trout Oncorhynchus mykiss T-bet and GATA3, to allow the future evaluation of the existence of Th1 and Th2 cells in salmonid fish. The trout T-bet translation shares high amino acid identities to other fish T-bet molecules (71-72%) but low identities to mammalian T-bet genes (41-42%), although the middle T-box DNA binding domain is highly conserved among all the T-bet proteins from fish and mammals. The trout GATA3 has high amino acid sequence identities (73-88%) to all known vertebrate molecules, with two highly conserved zinc finger motifs. The identity of the trout T-bet and GATA3 molecules was confirmed by phylogenetic tree analysis. A comparable expression level of T-bet and GATA3 was seen in the spleen, head kidney and muscle in healthy trout, but a higher expression level of GATA3 was seen in the gills, brain, skin and intestine relative to that of T-bet. T-bet and GATA3 expression was modulated by different stimulants. The T cell stimulant PHA up-regulated the expression of both T-bet and GATA3 in splenocytes, suggesting that they may be mainly expressed by activated T cells. The expression of T-bet and GATA3 in the spleen was increased by acute stress, but their expression was inhibited by bacterial (Yersinia ruckeri) infection. In a parasitic infection model, Tetracapsuloides bryosalmonae infection induced a biased gene expression profile where a large increase in the expression of T-bet, IFN-gamma and IL-2 was seen, suggesting that a Th1-like response is likely induced by this disease. A better understanding of pathogen modulated expression of T-bet and GATA3, and the potential underlying host immune responses elicited as a consequence of their expression, may allow novel future control measures against disease in fish to be developed." @default.
- W2093400261 created "2016-06-24" @default.
- W2093400261 creator A5030110760 @default.
- W2093400261 creator A5038092036 @default.
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- W2093400261 creator A5069674349 @default.
- W2093400261 date "2010-11-01" @default.
- W2093400261 modified "2023-10-05" @default.
- W2093400261 title "Sequence and expression analysis of two T helper master transcription factors, T-bet and GATA3, in rainbow trout Oncorhynchus mykiss and analysis of their expression during bacterial and parasitic infection☆" @default.
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- W2093400261 doi "https://doi.org/10.1016/j.fsi.2010.06.016" @default.
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