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Coordinated down-regulation of the antigen processing machinery in the gills of amoebic gill disease-affected Atlantic salmon (Salmo salar L.)
Citation
Young, ND and Cooper, GA and Nowak, BF and Koop, BF and Morrison, RN, Coordinated down-regulation of the antigen processing machinery in the gills of amoebic gill disease-affected Atlantic salmon (Salmo salar L.), Molecular Immunology, 45, (9) pp. 2581 - 2597. ISSN 0161-5890 (2008) [Refereed Article]
DOI: doi:10.1016/jmolimm.2007.12.023
Abstract
Several important cultured marine fish are highly susceptible to an ectoparasitic condition known as amoebic gill disease (AGD). In AGD-affected fish, modulation of IL-1β, p53 and p53-regulated transcripts is restricted to the (multi)focal AGD-associated gill lesions. To determine whether this lesion-restricted modulation of transcripts occurs on a transcriptome-wide scale and to identify mechanisms that underpin the susceptibility of fish to AGD, we compared the transcriptome of AGD lesions with "normal" tissue from AGD-affected and healthy individuals. Global gene expression profiling using a 16 K salmonid microarray, revealed a total of 176 significantly regulated annotated features and of those, the modulation of 99 (56%) was lesion-restricted. Annotated transcripts were classified according to functional gene ontology. Within the immune response category, transcripts were almost universally down-regulated. In AGD-affected tissue, significant, coordinated down-regulation of the major histocompatibility complex class I (MHC I) pathway-related genes occurred during the later stages of infection and appeared to be mediated by down-regulation of interferon-regulatory factor (IRF)-1, independent of interferon-α, interferon-γ and IRF-2 expression. Within this micro-environment, suppression of the MHC I and possibly the MHC II pathways may inhibit the development of acquired immunity and could explain the unusually high susceptibility of Atlantic salmon to AGD. © 2008 Elsevier Ltd. All rights reserved.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Research Division: | Agricultural and Veterinary Sciences |
| Research Group: | Fisheries Sciences |
| Research Field: | Fish Pests and Diseases |
| Objective Division: | Animal Production and Animal Primary Products |
| Objective Group: | Fisheries - Aquaculture |
| Objective Field: | Aquaculture Fin Fish (excl. Tuna) |
| UTAS Author: | Young, ND (Mr Neil Young) |
| UTAS Author: | Nowak, BF (Professor Barbara Nowak) |
| UTAS Author: | Morrison, RN (Dr Richard Morrison) |
| ID Code: | 55470 |
| Year Published: | 2008 |
| Web of Science® Times Cited: | 41 |
| Deposited By: | NC Marine Conservation and Resource Sustainability |
| Deposited On: | 2009-03-11 |
| Last Modified: | 2015-02-02 |
| Downloads: | 0 |
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