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Transcriptomic characterisation of a common skin lesion in farmed Chinook salmon


Anderson, KC and Ghosh, B and Chetty, T and Walker, SP and Symonds, JE and Nowak, BF, Transcriptomic characterisation of a common skin lesion in farmed Chinook salmon, Fish and Shellfish Immunology, 124 pp. 28-38. ISSN 1050-4648 (2022) [Refereed Article]

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Copyright 2022 Elsevier Ltd.

DOI: doi:10.1016/j.fsi.2022.03.024


Little is known about host responses of farmed Chinook salmon with skin lesions, despite the lesions being associated with increased water temperatures and elevated mortality rates. To address this shortfall, a transcriptomic approach was used to characterise the molecular landscape of spot lesions, the most commonly reported lesion type in New Zealand Chinook salmon, versus healthy appearing skin in fish with and without spot lesions. Many biological (gene ontology) pathways were enriched in lesion adjacent tissue, relative to control skin tissue, including proteolysis, fin regeneration, calcium ion binding, mitochondrial transport, actin cytoskeleton organisation, epithelium development, and tissue development. In terms of specific transcripts of interest, pro-inflammatory cytokines (interleukin 1β and tumour necrosis factor), annexin A1, mucin 2, and calreticulin were upregulated, while cathepsin H, mucin 5AC, and perforin 1 were downregulated in lesion tissue. In some instances, changes in gene expression were consistent between lesion and healthy appearing skin from the same fish relative to lesion free fish, suggesting that host responses weren't limited to the site of the lesion. Goblet cell density in skin histological sections was not different between skin sample types. Collectively, these results provide insights into the physiological changes associated with the common spot lesions in farmed Chinook salmon.

Item Details

Item Type:Refereed Article
Keywords:spot lesion, Chinook salmon, transcriptome, skin, mucin, annexin, cytokine
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Fisheries sciences
Research Field:Aquaculture
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - aquaculture
Objective Field:Aquaculture fin fish (excl. tuna)
UTAS Author:Anderson, KC (Dr Kelli Anderson)
UTAS Author:Ghosh, B (Dr Bikramjit Ghosh)
UTAS Author:Chetty, T (Ms Thaveshini Chetty)
UTAS Author:Nowak, BF (Professor Barbara Nowak)
ID Code:149510
Year Published:2022
Web of Science® Times Cited:1
Deposited By:Fisheries and Aquaculture
Deposited On:2022-04-03
Last Modified:2022-10-26

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