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Unravelling the main immune repertoire of Paracentrotus lividus following Vibrio anguillarum bath challenge

Title
Unravelling the main immune repertoire of Paracentrotus lividus following Vibrio anguillarum bath challenge
Type
Article in International Scientific Journal
Year
2024
Authors
Fernández-Boo, S
(Author)
Other
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Machado, A
(Author)
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Filipe F C Castro
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Azeredo, R
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Costas, B
(Author)
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Journal
Vol. 147
ISSN: 1050-4648
Publisher: Elsevier
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Publicação em ISI Web of Knowledge ISI Web of Knowledge - 0 Citations
Publicação em Scopus Scopus - 0 Citations
Other information
Authenticus ID: P-010-0QZ
Abstract (EN): Paracentrotus lividus is the most abundant echinoid species in the North East Atlantic Ocean and Mediterranean Sea. Although there is abundant genomic information of the species, there is no deep characterisation of the genes involved in the immune response. Here, a reference transcriptome of male and female coelomocytes was produced. The generated P. lividus transcriptome assembly has 203,511 transcripts, N50 transcript length of 1079 bp, and more than 90% estimated gene completeness in Eukaryota and Metazoa BUSCO databases, respectively. Differential gene expression analyses showed 54 and 55 up-regulated genes in P. lividus female and male coelomocyte tissues, respectively. These results suggest a similar immune gene repertoire between sexes. To examine the immune response, P. lividus was challenged with Vibrio anguillarum, one of the candidate pathogens for bald disease. Immune parameters were evaluated at cell and humoral levels, as well as the expression analysis of immune related genes at an early response stage. No differences were found at cellular and humoral levels with the exception of the increase of nitric oxide in perivisceral fluid of challenged animals. At the gene expression level, a total of 2721 genes were upregulated in challenged animals, 13.6 times higher expression than control group. Our analysis revealed that four major KEGG pathways were enriched in challenged animals: Autophagy (KEGG:04140), Endocytosis (KEGG:04144), Phagosome (KEGG:04145) and Protein processing in endoplasmic reticulum (KEGG:04141). Several toll-like receptors (TLR), scavenger receptors cysteine-rich (SRCR) or nucleotide-binding oligomerisation domain like receptors (NLR) were identified as major family genes for pathogen recognition and immune defence. This study provides a valuable transcriptomic resource and unfolds the molecular basis of immune response to V. anguillarum exposure. Overall, our findings contribute to the conservation effort of the P. lividus populations, as well as its sustainable exploitation in an aquaculture context.
Language: English
Type (Professor's evaluation): Scientific
No. of pages: 10
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