Serum amyloid A production by chicken fibroblast-like synoviocytes
| Autor: | Peter C.J. Tooten, Wil J.M. Landman, Alphonsus J.A.M. van Asten, Narin Upragarin, Erik Gruys |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Lipopolysaccharides
musculoskeletal diseases Lipopolysaccharide Amyloid animal diseases Immunology Gene Expression In situ hybridization Biology chemistry.chemical_compound Animals Northern blot Serum amyloid A Cells Cultured Poultry Diseases Southern blot Serum Amyloid A Protein General Veterinary Synovial Membrane Amyloidosis musculoskeletal system Molecular biology Blot stomatognathic diseases Real-time polymerase chain reaction chemistry Joint Diseases Chickens |
| Zdroj: | Veterinary Immunology and Immunopathology. 106:39-51 |
| ISSN: | 0165-2427 |
| DOI: | 10.1016/j.vetimm.2005.01.004 |
| Popis: | In brown chicken with chronic inflammatory processes of the joints amyloid arthropathy easily develops. The amyloid has been shown to be of the AA type which is derived from serum amyloid A (SAA). The aim of the present study was to investigate whether fibroblast-like synoviocytes (FLS) originating from brown chicken and other chicken breeds express SAA mRNA and produce SAA protein. FLS were isolated from the knee joint synovium of healthy brown chickens, white chickens, and broilers. The absence of macrophages in FLS cultures was confirmed by assessment of the phagocytic capability and by immunohistochemistry. Additionally, cultured cells were identified by electron microscopy and immunohistochemical staining. Expression of SAA mRNA in normal and lipopolysaccharide (LPS)-stimulated cells was assessed by in situ hybridization, Northern blot analysis, reverse transcriptase-polymerase chain reaction (RT-PCR), Southern blot analysis and real-time quantitative PCR. SAA protein production was analyzed by Western blotting and ELISA. SAA mRNA was detected in unstimulated FLS isolated from the three different chicken breeds and more abundantly in those stimulated with LPS. However, SAA protein production was only detected in culture medium and cell lysate of LPS-stimulated FLS. Furthermore, FLS produced SAA in a concentration-dependent manner after stimulation with different amounts of LPS. The data suggest that during infection and inflammation chicken FLS may act as a source of articular SAA. This process may enhance development of amyloid from SAA in the joint. |
| Databáze: | OpenAIRE |
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