Cell type-specific differences in β-glucan recognition and signalling in porcine innate immune cells
| Autor: | Eva Sonck, Kim Baert, Eric Cox, Bruno Goddeeris, Bert Devriendt |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
beta-glucan
beta-Glucans Neutrophils Swine medicine.medical_treatment Immunology Macrophage-1 Antigen macromolecular substances Biology complement receptor 3 Focal adhesion Immunomodulation Immune system neutrophils Phagocytosis medicine Animals Syk Kinase Lectins C-Type Veterinary Sciences Scavenger receptor RNA Small Interfering Receptor Respiratory Burst Innate immune system Macrophages Intracellular Signaling Peptides and Proteins Protein-Tyrosine Kinases Immunity Innate macrophages Respiratory burst Cell biology carbohydrates (lipids) stomatognathic diseases Cytokine Focal Adhesion Protein-Tyrosine Kinases Cytokines Cytokine secretion RNA Interference dectin-1 Reactive Oxygen Species Developmental Biology Signal Transduction |
| Zdroj: | Veterinary Immunology, 5th European workshop, Abstracts Keystone symposia on Molecular and Cellular Biology, Abstracts |
| ISSN: | 1879-0089 |
| Popis: | β-glucans exert receptor-mediated immunomodulating activities, including oxidative burst activity and cytokine secretion. The role of the β-glucan receptors dectin-1 and complement receptor 3 (CR3) in the response of immune cells towards β-glucans is still unresolved. Dectin-1 is considered as the main β-glucan receptor in mice, while recent studies in man show that CR3 is more important in β-glucan-mediated responses. This incited us to elucidate which receptor contributes to the response of innate immune cells towards particulate β-glucans in pigs as the latter might serve as a better model for man. Our results show an important role of CR3 in β-glucan recognition, as blocking this receptor strongly reduced the phagocytosis of β-glucans and the β-glucan-induced ROS production by porcine neutrophils. Conversely, dectin-1 does not seem to play a major role in β-glucan recognition in neutrophils. However, recognition of β-glucans appeared cell type-specific as both dectin-1 and CR3 are involved in the β-glucan-mediated responses in pig macrophages. Moreover, CR3 signalling through focal adhesion kinase (FAK) was indispensable for β-glucan-mediated ROS production and cytokine production in neutrophils and macrophages, while the Syk-dependent pathway was only partly involved in these responses. We may conclude that CR3 plays a cardinal role in β-glucan signalling in porcine neutrophils, while macrophages use a more diverse receptor array to detect and respond towards β-glucans. Nonetheless, FAK acts as a master switch that regulates β-glucan-mediated responses in neutrophils as well as macrophages. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect