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Sökning: WFRF:(Taipale J) > Medicin och hälsovetenskap

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  • Nousiainen, L, et al. (författare)
  • Human kinome analysis reveals novel kinases contributing to virus infection and retinoic-acid inducible gene I-induced type I and type III IFN gene expression
  • 2013
  • Ingår i: Innate immunity. - : SAGE Publications. - 1753-4267 .- 1753-4259. ; 19:5, s. 516-530
  • Tidskriftsartikel (refereegranskat)abstract
    • Activation of host innate antiviral responses are mediated by retinoic-acid inducible gene I ( RIG-I)-like receptors, RIG-I and melanoma differentiation-associated gene 5, and TLRs 3, 7, 8 and 9, recognising different types of viral nucleic acids. The major components of the RIG-I- and TLR pathways have putatively been identified, but previously unrecognised kinases may contribute to virus infection-induced activation of the IFN response. Here, we screened a human kinase cDNA library, termed the kinome, using an IFN-λ1 promoter-driven luciferase reporter assay in HEK293 cells during Sendai virus infection. Of the 568 kinases analysed, nearly 50 enhanced IFN-λ1 gene expression at least twofold in response to Sendai virus infection. The best activators were FYN ( FYN oncogene related to SRC, FGR, YES), serine/threonine kinase 24, activin A receptor type 1 and SRPK1 (SFRS protein kinase 1). These kinases enhanced RIG-I-dependent IFN-λ1 promoter activation via IFN-stimulated response and NF-κB elements, as confirmed using mutant IFN-λ1 promoter constructs. FYN and SRPK1 enhanced IFN-λ1 and CXCL10 protein production via the RIG-I pathway, and stimulated RIG-I and MyD88-dependent phosphorylation of IRF3 and IRF7 transcription factors, respectively. We conclude that several previously unrecognised kinases, particularly FYN and SRPK1, positively regulate IFN-λ1 and similarly regulated cytokine and chemokine genes during viral infection.
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  • Haiko, Paula, et al. (författare)
  • Deletion of vascular endothelial growth factor C (VEGF-C) and VEGF-D is not equivalent to VEGF receptor 3 deletion in mouse embryos.
  • 2008
  • Ingår i: Molecular and Cellular Biology. - 0270-7306 .- 1098-5549. ; 28:15
  • Tidskriftsartikel (refereegranskat)abstract
    • Lymphatic vessels play an important role in the regulation of tissue fluid balance, immune responses, and fat adsorption and are involved in diseases including lymphedema and tumor metastasis. Vascular endothelial growth factor (VEGF) receptor 3 (VEGFR-3) is necessary for development of the blood vasculature during early embryogenesis, but later, VEGFR-3 expression becomes restricted to the lymphatic vasculature. We analyzed mice deficient in both of the known VEGFR-3 ligands, VEGF-C and VEGF-D. Unlike the Vegfr3(-/-) embryos, the Vegfc(-/-); Vegfd(-/-) embryos displayed normal blood vasculature after embryonic day 9.5. Deletion of Vegfr3 in the epiblast, using keratin 19 (K19) Cre, resulted in a phenotype identical to that of the Vegfr3(-/-) embryos, suggesting that this phenotype is due to defects in the embryo proper and not in placental development. Interestingly, the Vegfr3(neo) hypomorphic mutant mice carrying the neomycin cassette between exons 1 and 2 showed defective lymphatic development. Overexpression of human or mouse VEGF-D in the skin, under the K14 promoter, rescued the lymphatic hypoplasia of the Vegfc(+/-) mice in the K14-VEGF-D; Vegfc(+/-) compound mice, suggesting that VEGF-D is functionally redundant with VEGF-C in the stimulation of developmental lymphangiogenesis. Our results suggest VEGF-C- and VEGF-D-independent functions for VEGFR-3 in the early embryo.
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