2024-03-29T14:13:53Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/2201222022-10-04T06:43:41Zcom_10261_94com_10261_8col_10261_347
DIGITAL.CSIC
author
Torres Rodríguez, M.
author
Navarro, Juan Carlos
author
Varó, Inmaculada
author
Agulleiro Gozalbo, Maria Josep
author
Morais, Sofia
author
Monroig, Óscar
author
Hontoria, Francisco
funder
Ministerio de Economía y Competitividad (España)
funder
Generalitat Valenciana
funder
Diputación de Castellón
orcid
Navarro, Juan Carlos [0000-0001-6976-6686]
orcid
Varó, Inmaculada [0000-0002-3937-3846]
orcid
Monroig, Óscar [0000-0001-8712-0440]
orcid
Hontoria, Francisco [0000-0003-2466-1375]
2020-09-23T10:19:57Z
2020-09-23T10:19:57Z
2020-04-15
Aquaculture 520: 734949 (2020)
0044-8486
http://hdl.handle.net/10261/220122
10.1016/j.aquaculture.2020.734949
http://dx.doi.org/10.13039/501100003359http://dx.doi.org/10.13039/501100003329
Long-chain polyunsaturated fatty acids (LC-PUFA) have been extensively studied in aquaculture due to their importance for survival and development in teleosts. However, very long-chain polyunsaturated fatty acids (VLC-PUFA) have been practically unexplored within the aquaculture scenario. VLC-PUFA, although always present in small amounts, can be pivotal for the correct development and function of tissues such as retina, brain and gonads of vertebrates including fish. This study aimed at determining the temporal expression patterns of genes involved in the biosynthesis of VLC-PUFA (elovl4a, elovl4b) and their precursors, LC-PUFA, (fads2, elovl5) during the early ontogeny of Solea senegalensis and Sparus aurata. Furthermore, we investigated the nutritional regulation of these genes in early life-cycle stages of fish fed low and high LC-PUFA diets consisting of non-enriched and enriched live preys (Brachionus plicatilis and Artemia franciscana), respectively. The effect of dietary LC-PUFA on growth and fatty acid composition was also examined. The results obtained during early development reveal that all genes studied are expressed before the hatching stage. There is a consistency between the timing at which retinogenesis occurs in both species and an increase of the expression of the two elovl4 responsible for the synthesis of VLC-PUFA. The results obtained in nutritional assays for both species suggest that the expression of the two isoforms of elovl4 (isoform a in early larvae, and b in late larvae) can be regulated positively according to the dietary content of LC-PUFA in early stages, which could activate the VLC-PUFA biosynthesis even during short-term feeding periods (seven days). The body part analysis in late larvae of both species revealed that both isoforms of elovl4 are expressed preferentially in the head. This can be associated to their highest presence in the neural and visual tissues.
eng
openAccess
Solea senegalensis
Sparus aurata
Marine larvae
Very long-chain polyunsaturated fatty acid
Elovl4
Expression of genes related to long-chain (C18-22) and very long-chain (>C24) fatty acid biosynthesis in gilthead seabream (Sparus aurata) and Senegalese sole (Solea senegalensis) larvae: Investigating early ontogeny and nutritional regulation
artículo
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URL
https://digital.csic.es/bitstream/10261/220122/1/Expression_genes.docx
File
MD5
ea296f7e7cd228df51f5f71167b80dbe
157450
application/vnd.openxmlformats-officedocument.wordprocessingml.document
Expression_genes.docx