At Least Two Genes Encode Many Variants of Irak3 in Rainbow Trout, but Neither the Full-Length Factor Nor Its Variants Interfere Directly With the TLR-Mediated Stimulation of Inflammation
The interleukin-1-receptor-associated kinase 3 (IRAK3) is known in mammals as a negative feedback regulator of NF-κB-mediated innate-immune mechanisms. Our RNA-seq experiments revealed a prototypic 1920-nt sequence encoding irak3 from rainbow trout (Oncorhynchus mykiss), as well as 20 variants that...
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ftdoajarticles:oai:doaj.org/article:a1db9b48f9644d9ebe4c74310f6d61b6 2023-05-15T15:32:57+02:00 At Least Two Genes Encode Many Variants of Irak3 in Rainbow Trout, but Neither the Full-Length Factor Nor Its Variants Interfere Directly With the TLR-Mediated Stimulation of Inflammation Alexander Rebl Henrike Rebl Marieke Verleih Stephanie Haupt Judith M. Köbis Tom Goldammer Hans-Martin Seyfert 2019-09-01T00:00:00Z https://doi.org/10.3389/fimmu.2019.02246 https://doaj.org/article/a1db9b48f9644d9ebe4c74310f6d61b6 EN eng Frontiers Media S.A. https://www.frontiersin.org/article/10.3389/fimmu.2019.02246/full https://doaj.org/toc/1664-3224 1664-3224 doi:10.3389/fimmu.2019.02246 https://doaj.org/article/a1db9b48f9644d9ebe4c74310f6d61b6 Frontiers in Immunology, Vol 10 (2019) CHSE-214 GFP expression plasmid IRAK-3 salmonid fishes Toll-like receptor signaling Immunologic diseases. Allergy RC581-607 article 2019 ftdoajarticles https://doi.org/10.3389/fimmu.2019.02246 2022-12-31T04:12:25Z The interleukin-1-receptor-associated kinase 3 (IRAK3) is known in mammals as a negative feedback regulator of NF-κB-mediated innate-immune mechanisms. Our RNA-seq experiments revealed a prototypic 1920-nt sequence encoding irak3 from rainbow trout (Oncorhynchus mykiss), as well as 20 variants that vary in length and nucleotide composition. Based on the DNA-sequence information from two closely related irak3 genes from rainbow trout and an irak3-sequence fragment from Atlantic salmon retrieved from public databases, we elucidated the underlying genetic causes for this striking irak3 diversity. Infecting rainbow trout with a lethal dose of Aeromonas salmonicida enhanced the expression of all variants in the liver, head kidney, and peripheral blood leucocytes. We analyzed the functional impact of the full-length factor and selected structural variants by overexpressing them in mammalian HEK-293 cells. The full-length factor enhanced the basal activity of NF-κB, but did not dampen the TLR2-signaling-induced levels of NF-κB activation. Increasing the basal NF-κB-activity through Irak3 apparently does not involve its C-terminal domain. However, more severely truncated factors had only a minor impact on the activity of NF-κB. The TLR2-mediated stimulation did not alter the spatial distribution of Irak3 inside the cells. In salmonid CHSE-214 cells, we observed that the Irak3-splice variant that prominently expresses the C-terminal domain significantly quenched the stimulation-dependent production of interleukin-1β and interleukin-8, but not the production of other immune regulators. We conclude that the different gene and splice variants of Irak3 from trout play distinct roles in the activation of immune-regulatory mechanisms. Article in Journal/Newspaper Atlantic salmon Directory of Open Access Journals: DOAJ Articles Frontiers in Immunology 10 |
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English |
topic |
CHSE-214 GFP expression plasmid IRAK-3 salmonid fishes Toll-like receptor signaling Immunologic diseases. Allergy RC581-607 |
spellingShingle |
CHSE-214 GFP expression plasmid IRAK-3 salmonid fishes Toll-like receptor signaling Immunologic diseases. Allergy RC581-607 Alexander Rebl Henrike Rebl Marieke Verleih Stephanie Haupt Judith M. Köbis Tom Goldammer Hans-Martin Seyfert At Least Two Genes Encode Many Variants of Irak3 in Rainbow Trout, but Neither the Full-Length Factor Nor Its Variants Interfere Directly With the TLR-Mediated Stimulation of Inflammation |
topic_facet |
CHSE-214 GFP expression plasmid IRAK-3 salmonid fishes Toll-like receptor signaling Immunologic diseases. Allergy RC581-607 |
description |
The interleukin-1-receptor-associated kinase 3 (IRAK3) is known in mammals as a negative feedback regulator of NF-κB-mediated innate-immune mechanisms. Our RNA-seq experiments revealed a prototypic 1920-nt sequence encoding irak3 from rainbow trout (Oncorhynchus mykiss), as well as 20 variants that vary in length and nucleotide composition. Based on the DNA-sequence information from two closely related irak3 genes from rainbow trout and an irak3-sequence fragment from Atlantic salmon retrieved from public databases, we elucidated the underlying genetic causes for this striking irak3 diversity. Infecting rainbow trout with a lethal dose of Aeromonas salmonicida enhanced the expression of all variants in the liver, head kidney, and peripheral blood leucocytes. We analyzed the functional impact of the full-length factor and selected structural variants by overexpressing them in mammalian HEK-293 cells. The full-length factor enhanced the basal activity of NF-κB, but did not dampen the TLR2-signaling-induced levels of NF-κB activation. Increasing the basal NF-κB-activity through Irak3 apparently does not involve its C-terminal domain. However, more severely truncated factors had only a minor impact on the activity of NF-κB. The TLR2-mediated stimulation did not alter the spatial distribution of Irak3 inside the cells. In salmonid CHSE-214 cells, we observed that the Irak3-splice variant that prominently expresses the C-terminal domain significantly quenched the stimulation-dependent production of interleukin-1β and interleukin-8, but not the production of other immune regulators. We conclude that the different gene and splice variants of Irak3 from trout play distinct roles in the activation of immune-regulatory mechanisms. |
format |
Article in Journal/Newspaper |
author |
Alexander Rebl Henrike Rebl Marieke Verleih Stephanie Haupt Judith M. Köbis Tom Goldammer Hans-Martin Seyfert |
author_facet |
Alexander Rebl Henrike Rebl Marieke Verleih Stephanie Haupt Judith M. Köbis Tom Goldammer Hans-Martin Seyfert |
author_sort |
Alexander Rebl |
title |
At Least Two Genes Encode Many Variants of Irak3 in Rainbow Trout, but Neither the Full-Length Factor Nor Its Variants Interfere Directly With the TLR-Mediated Stimulation of Inflammation |
title_short |
At Least Two Genes Encode Many Variants of Irak3 in Rainbow Trout, but Neither the Full-Length Factor Nor Its Variants Interfere Directly With the TLR-Mediated Stimulation of Inflammation |
title_full |
At Least Two Genes Encode Many Variants of Irak3 in Rainbow Trout, but Neither the Full-Length Factor Nor Its Variants Interfere Directly With the TLR-Mediated Stimulation of Inflammation |
title_fullStr |
At Least Two Genes Encode Many Variants of Irak3 in Rainbow Trout, but Neither the Full-Length Factor Nor Its Variants Interfere Directly With the TLR-Mediated Stimulation of Inflammation |
title_full_unstemmed |
At Least Two Genes Encode Many Variants of Irak3 in Rainbow Trout, but Neither the Full-Length Factor Nor Its Variants Interfere Directly With the TLR-Mediated Stimulation of Inflammation |
title_sort |
at least two genes encode many variants of irak3 in rainbow trout, but neither the full-length factor nor its variants interfere directly with the tlr-mediated stimulation of inflammation |
publisher |
Frontiers Media S.A. |
publishDate |
2019 |
url |
https://doi.org/10.3389/fimmu.2019.02246 https://doaj.org/article/a1db9b48f9644d9ebe4c74310f6d61b6 |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_source |
Frontiers in Immunology, Vol 10 (2019) |
op_relation |
https://www.frontiersin.org/article/10.3389/fimmu.2019.02246/full https://doaj.org/toc/1664-3224 1664-3224 doi:10.3389/fimmu.2019.02246 https://doaj.org/article/a1db9b48f9644d9ebe4c74310f6d61b6 |
op_doi |
https://doi.org/10.3389/fimmu.2019.02246 |
container_title |
Frontiers in Immunology |
container_volume |
10 |
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1766363433969647616 |