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- W1977762016 abstract "The upstream flanking region of the rainbow trout (Oncorhynchus mykiss) IL-1β1 gene has been cloned and characterised functionally using luciferase-based reporter gene constructs, and the transcription start site (TSS) confirmed by RLM-RACE. A TATA box was present 27 bp upstream of the TSS, with an NF-kB site 19 bp upstream of the TATA box. Within 1217 bp of upstream sequence, 3 sites for NF-kB, 10 sites for NF-IL6, 15 sites for AP1, 6 sites for AP4, 2 sites for CHOP/CEBPα and 1 site for SP1 and PU.1 were identified. Seven potential sites for the transcription repressor Gfi-1 were also identified. Analysis of eight IL-1β1s promoter luciferase constructs transfected into a trout fibroblast (RTG-2) cell line known to constitutively express IL-1β revealed that in the absence of intron 1, very low luciferase activity was detectable. All of the constructs containing intron 1 gave clear luciferase activity, with the highest luciferase activity detected with construct P2-4 containing 617 bp of upstream sequence. As little as 82 bp of upstream sequence gave relatively strong luciferase activity, a region containing both a PU.1 and NF-kB site. That NF-kB is a transcription factor required for expression of the trout IL-1β1 gene was confirmed using inhibitor studies with lipopolysaccharide (LPS)-stimulated macrophages. Both trout recombinant IL-1β and LPS were able to increase luciferase activity in the reporter constructs, especially in those containing the most upstream sequence with the lowest constitutive expression. The possibility that an upstream repressor is functioning to inhibit constitutive expression of IL-1β in this species is discussed." @default.
- W1977762016 created "2016-06-24" @default.
- W1977762016 creator A5030110760 @default.
- W1977762016 creator A5041651727 @default.
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- W1977762016 date "2002-05-01" @default.
- W1977762016 modified "2023-10-15" @default.
- W1977762016 title "Cloning and functional characterisation of the interleukin-1β1 promoter of rainbow trout (Oncorhynchus mykiss)" @default.
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- W1977762016 doi "https://doi.org/10.1016/s0167-4781(02)00235-x" @default.
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