Expression of P2 receptors at sites of chronic inflammation
| Autor: | L. de Leij, Daniel T. Luttikhuizen, Martin C. Harmsen, M.J.A. van Luyn |
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| Přispěvatelé: | Groningen University Institute for Drug Exploration (GUIDE), Restoring Organ Function by Means of Regenerative Medicine (REGENERATE), Vascular Ageing Programme (VAP) |
| Rok vydání: | 2004 |
| Předmět: |
Giant Cells
Foreign-Body Male ADP Cell signaling Time Factors vasculature Histology male) EXTRACELLULAR ATP Inflammation Biology P2 receptor DENDRITIC CELLS Pathology and Forensic Medicine Immunoenzyme Techniques foreign body reaction Downregulation and upregulation rat (AO male) medicine Extracellular Animals Receptor purine NUCLEOTIDE RECEPTORS rat (AO Receptors Purinergic P2 Foreign-Body Reaction PROLIFERATION Rats Inbred Strains CYTOKINE PRODUCTION MESENTERIC BED Cell Biology ENDOTHELIAL-CELLS Rats macrophages APOPTOSIS Cell biology Disease Models Animal MICE Giant cell Immunology medicine.symptom Signal transduction |
| Zdroj: | Cell and Tissue Research, 317(3), 289-298. SPRINGER |
| ISSN: | 1432-0878 0302-766X |
| Popis: | Extracellular nucleotides have been identified as important signaling molecules. These nucleotides act on the P2 family of receptors that respond by either forming an ion-channel or by activation of a signal transduction cascade, both of which enable a cellular response. Although a role for P2 receptors in inflammation has been implied, the local expression pattern and kinetics of these receptors at sites of inflammation are not known. Therefore, we have studied the expression of the P2 receptors expressed by inflammatory cells or by cells in the vasculature, with special attention to P2X(1)R, P2X(7)R, P2Y(1)R, and P2Y(2)R. As a suitable model for studying inflammatory reactions, we have employed the foreign body reaction (FBR), a sterile inflammatory reaction induced by implanting degradable cross-linked dermal sheep collagen disks subcutaneously in the rat. We show that, in the vasculature, the expression of P2X(7)R, P2Y(1)R, and P2Y(2)R increase until day 2. The expression of P2X(7)R and P2Y(1)R on macrophages and giant cells increased during the course of the inflammatory reaction which was studied for 21 days. The expression of the P2Y(2)R on macrophages and giant cells inside the foreign body increases with time, whereas the expression on macrophages in the surrounding tissue is maximal at day 5. The expression of P2X(1)R remains at a constant low level. The upregulation of P2X(7)R, P2Y(1)R, and P2Y(2)R over time suggests a regulatory function for these receptors in inflammation. |
| Databáze: | OpenAIRE |
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