Viral infection and Toll-like receptor agonists induce a differential expression of type I and lambda interferons in human plasmacytoid and monocyte-derived dendritic cells.
In humans, the type I interferon (IFN) family consists of 13 IFN-alpha subtypes, IFN-beta and IFN-omicron the newly discovered IFN-like family consists of IFN-lambda1, -lambda2 and -lambda3. We have investigated the expression of type I and lambda IFN genes following virus infections or Toll-like receptor (TLR) triggering in monocyte-derived DC (MDDC) and plasmacytoid DC (pDC). We found that all IFN-alpha, -beta, -omicron and -lambda subtypes are expressed in influenza-virus-infected MDDC or pDC. Conversely, differential type I IFN gene transcription was induced in MDDC and pDC stimulated by specific TLR agonists. TLR-9 stimulation by CpG DNA induced the expression of all IFN-alpha, -beta, -omicron and -lambda subtypes in pDC, whereas TLR-4 stimulation by LPS, or TLR-3 stimulation by poly I:C, induced only IFN-beta and IFN-lambda gene expression in MDDC. The expression pattern of IFN regulatory factor (IRF)-5 and IRF-7 in MDDC and pDC was also determined. IRF-5 was constitutively expressed in the two DC subsets whereas IRF-7 was constitutive in pDC but its expression was induced along MDDC maturation. Overall, our data indicate that the coordinated expression of IFN-lambda with IFN-beta would be of crucial importance for the maturation of DC.
Laboratory of Immunology, Department of Infectious, Parasitic and Immune-mediated Diseases, Istituto Superiore di Sanità, Rome, Italy.
Eliana M
EM
Coccia
Laboratory of Immunology, Department of Infectious, Parasitic and Immune-mediated Diseases, Istituto Superiore di Sanità, Rome, Italy.|CNRS UMR 5124, Montpellier, France.
Martina
M
Severa
Laboratory of Immunology, Department of Infectious, Parasitic and Immune-mediated Diseases, Istituto Superiore di Sanità, Rome, Italy.
Elena
E
Giacomini
CNRS UMR 5124, Montpellier, France.
Danièle
D
Monneron
Laboratory of Immunology, Department of Infectious, Parasitic and Immune-mediated Diseases, Istituto Superiore di Sanità, Rome, Italy.
Maria Elena
ME
Remoli
Department of Microbiology, National Public Health Institute, Helsinki, Finland.
Ilkka
I
Julkunen
Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, USA.
Marina
M
Cella
Laboratory of Immunology, Department of Infectious, Parasitic and Immune-mediated Diseases, Istituto Superiore di Sanità, Rome, Italy.
Roberto
R
Lande
CNRS UMR 5124, Montpellier, France.
Gilles
G
Uzé
D002460:Cell Line; D002478:Cells, Cultured; D004268:DNA-Binding Proteins / Q000096:biosynthesis / Q000235:genetics; D003713:Dendritic Cells / Q000145:classification / Q000276:immunology* / Q000821:virology*; D015870:Gene Expression; D006801:Humans; D009980:Influenza A virus / Q000502:physiology*; D050839:Interferon Regulatory Factor-7; D050835:Interferon Regulatory Factors; D007370:Interferon Type I / Q000096:biosynthesis* / Q000235:genetics; D007372:Interferons / Q000096:biosynthesis* / Q000235:genetics; D008562:Membrane Glycoproteins / Q000819:agonists*; D009000:Monocytes / Q000166:cytology / Q000276:immunology; D012333:RNA, Messenger / Q000096:biosynthesis; D011956:Receptors, Cell Surface / Q000819:agonists*; D051196:Toll-Like Receptor 3; D051197:Toll-Like Receptor 4; D051217:Toll-Like Receptor 9; D051193:Toll-Like Receptors; D014157:Transcription Factors / Q000096:biosynthesis / Q000235:genetics
D004268:DNA-Binding Proteins; C431713:IRF5 protein, human; C494234:IRF7 protein, human; D050839:Interferon Regulatory Factor-7; D050835:Interferon Regulatory Factors; D007370:Interferon Type I; D008562:Membrane Glycoproteins; D012333:RNA, Messenger; D011956:Receptors, Cell Surface; C495344:TLR3 protein, human; C495345:TLR4 protein, human; C495371:TLR9 protein, human; D051196:Toll-Like Receptor 3; D051197:Toll-Like Receptor 4; D051217:Toll-Like Receptor 9; D051193:Toll-Like Receptors; D014157:Transcription Factors; D007372:Interferons