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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Rowley, Andrew F. Morgan, Elizabeth L. Taylor, Graham W. Sunyer, J. Oriol Holland, Jason W. Vogan, Claire L. Secombes, Christopher J. |
| Description | Country affiliation: United kingdom Author Affiliation: Rowley AF ( Department of Biosciences, College of Science, Swansea University, Swansea, SA2 8PP, UK. a.f.rowley@swansea.ac.uk) |
| Abstract | Both eicosanoid generation and the complement system have long evolutionary histories predating the emergence of the vertebrates over 500 myr ago. This study investigated the interplay between these two systems in an example of a bony fish, the rainbow trout (Oncorhynchus mykiss). Specifically, it examined whether purified complement fragments including C3a-1 and zymosan-activated serum, stimulate the biosynthesis of any of these eicosanoids by trout macrophages. Incubation of macrophages with zymosan pre-incubated with normal trout serum resulted in the phagocytosis of such particles and the generation of both intra- and extra-cellularly located lipoxygenase and cyclooxygenase products. Both eicosanoid generation and phagocytosis levels were significantly elevated following incubation of zymosan in trout serum in comparison with heat-inactivated (60°C for 30 min) trout serum and saline alone. A combined mass spectrometry/high performance liquid chromatography approach was employed to conclusively demonstrate the presence of the cyclooxygenase product, prostaglandin E (PGE) in the culture supernatants of ionophore-challenged macrophages. Incubation of trout macrophages with zymosan-activated trout serum (i.e. no zymosan present) failed to stimulate PGE generation. Similarly, incubation of these cells for up to 60 min with C3a-1 (4 or 50 nM) failed to generate significant amounts of PGE or lipoxygenase products such as leukotriene B(4/5) or lipoxin A(4/5). Longer term (6 & 24h) incubation of macrophages with C3a-1 (4 nM) resulted in a time dependent increase in the generation of PGE but not leukotriene B in culture supernatants. No conclusive evidence that the increase in PGE generation was caused by changes in the expression of either cyclooxygenase-1 or -2 was found. |
| File Format | HTM / HTML |
| ISSN | 0145305X |
| Issue Number | 1 |
| Volume Number | 36 |
| e-ISSN | 18790089 |
| Journal | Developmental & Comparative Immunology |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2012-01-01 |
| Publisher Place | United States |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Immunology Complement C3a Metabolism Fish Proteins Macrophages Oncorhynchus Mykiss Prostaglandins E Animals Cells, Cultured Chromatography, High Pressure Liquid Immunology Complement Pathway, Alternative Gene Expression Regulation Lipoxygenase Genetics Pathology Mass Spectrometry Phagocytosis Prostaglandin-endoperoxide Synthases Zymosan Journal Article Research Support, Non-u.s. Gov't Research Support, U.s. Gov't, Non-p.h.s. |
| Content Type | Text |
| Resource Type | Article |
| Subject | Developmental Biology Immunology |
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