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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Heikema, Astrid P. Crocker, Paul R. Lewis, Leanne E. Oetke, Cornelia Klaas, Mariliis Easton, Alistair Willison, Hugh J. Erwig, Lars P. |
| Description | Country affiliation: United kingdom Author Affiliation: Klaas M ( Division of Cell Signalling and Immunology, College of Life Sciences, University of Dundee, Dundee DD1 5EH, United Kingdom.) |
| Abstract | Sialoadhesin (Sn) is a macrophage (Mφ)-restricted receptor that recognizes sialylated ligands on host cells and pathogens. Although Sn is thought to be important in cellular interactions of Mφs with cells of the immune system, the functional consequences of pathogen engagement by Sn are unclear. As a model system, we have investigated the role of Sn in Mφ interactions with heat-killed Campylobacter jejuni expressing a GD1a-like, sialylated glycan. Compared to Sn-expressing bone marrow-derived macrophages (BMDM) from wild-type mice, BMDM from mice either deficient in Sn or expressing a non-glycan-binding form of Sn showed greatly reduced phagocytosis of sialylated C. jejuni. This was accompanied by a strong reduction in MyD88-dependent secretion of TNF- , IL-6, IL-12, and IL-10. In vivo studies demonstrated that functional Sn was required for rapid TNF- and IFN-ß responses to i.v.-injected sialylated C. jejuni. Bacteria were captured within minutes after i.v. injection and were associated with Mφs in both liver and spleen. In the spleen, IFN-ß-reactive cells were localized to Snâ º Mφs and other cells in the red pulp and marginal zone. Together, these studies demonstrate that Sn plays a key role in capturing sialylated pathogens and promoting rapid proinflammatory cytokine and type I IFN responses. |
| ISSN | 00221767 |
| e-ISSN | 15506606 |
| DOI | 10.4049/jimmunol.1200776 |
| Journal | The Journal of Immunology |
| Issue Number | 5 |
| Volume Number | 189 |
| Language | English |
| Publisher | The American Association of Immunologists |
| Publisher Date | 2012-09-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Campylobacter Jejuni Immunology Pathogenicity Inflammation Mediators Metabolism Interferon Type I Physiology Membrane Glycoproteins Receptors, Immunologic Sialoglycoproteins Animals Bone Marrow Cells Cells, Cultured Gene Knock-in Techniques Host-pathogen Interactions Mice Mice, 129 Strain Mice, Inbred Balb C Mice, Inbred C57bl Mice, Knockout Sialic Acid Binding Ig-like Lectin 1 Time Factors Research Support, Non-u.s. Gov't Discipline Immunology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Immunology and Allergy Immunology |
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