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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Riboldi, Elena Gilfillan, Susan Trinchieri, Giorgio Colonna, Marco Kim, Alfred H. J. Swiecki, Melissa Wang, Yaming Dzutsev, Amiran Vermi, William Ruedl, Christiane |
| Description | Author Affiliation: Swiecki M ( Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110) |
| Abstract | Plasmacytoid dendritic cells (pDC) produce IFN-I in response to viruses and are routinely identified in mice by SiglecH expression. SiglecH is a sialic acid-binding Ig-like lectin that has an immunomodulatory role during viral infections. In this study, we evaluated the impact of SiglecH deficiency on cytokine responses in the presence and absence of pDC. We found that lack of SiglecH enhanced IFN-I responses to viral infection, regardless of whether pDC were depleted. We also examined the expression pattern of SiglecH and observed that it was expressed by specialized macrophages and progenitors of classical dendritic cells and pDC. Accordingly, marginal zone macrophages and pDC precursors were eliminated in newly generated SiglecH-diphtheria toxin receptor (DTR)-transgenic (Tg) mice but not in CLEC4C-DTR-Tg mice after diphtheria toxin (DT) treatment. Using two bacterial models, we found that SiglecH-DTR-Tg mice injected with DT had altered bacterial uptake and were more susceptible to lethal Listeria monocytogenes infection than were DT-treated CLEC4C-DTR-Tg mice. Taken together, our findings suggest that lack of SiglecH may affect cytokine responses by cell types other than pDC during viral infections, perhaps by altering viral distribution or burden, and that cell depletion in SiglecH-DTR-Tg mice encompasses more than pDC. |
| ISSN | 00221767 |
| e-ISSN | 15506606 |
| DOI | 10.4049/jimmunol.1303135 |
| Journal | The Journal of Immunology |
| Issue Number | 9 |
| Volume Number | 192 |
| Language | English |
| Publisher | The American Association of Immunologists |
| Publisher Date | 2014-05-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Dendritic Cells Immunology Intercellular Signaling Peptides And Proteins Biosynthesis Lectins Genetics Receptors, Cell Surface Animals Cell Separation Cytokines Diphtheria Toxin Metabolism Enzyme-linked Immunosorbent Assay Flow Cytometry Fluorescent Antibody Technique Gene Knock-in Techniques Heparin-binding Egf-like Growth Factor Immunohistochemistry Infection Macrophages Mice Mice, Inbred C57bl Mice, Transgenic Reverse Transcriptase Polymerase Chain Reaction Research Support, N.i.h., Extramural Research Support, Non-u.s. Gov't Discipline Immunology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Immunology and Allergy Immunology |
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