Hepatic transcriptome analysis of inter-family variability in flesh n-3 long-chain polyunsaturated fatty acid content in Atlantic salmon
Abstract Background Genetic selection of Atlantic salmon families better adapted to alternative feed formulations containing high levels of vegetable ingredients has been suggested to ensure sustainable growth of aquaculture. The present study aimed to identify molecular pathways that could underlie...
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ftdoajarticles:oai:doaj.org/article:c0e60ea1870c49868c8a31aa7963af6f 2023-05-15T15:32:04+02:00 Hepatic transcriptome analysis of inter-family variability in flesh n-3 long-chain polyunsaturated fatty acid content in Atlantic salmon Morais Sofia Taggart John B Guy Derrick R Bell J Tocher Douglas R 2012-08-01T00:00:00Z https://doi.org/10.1186/1471-2164-13-410 https://doaj.org/article/c0e60ea1870c49868c8a31aa7963af6f EN eng BMC http://www.biomedcentral.com/1471-2164/13/410 https://doaj.org/toc/1471-2164 doi:10.1186/1471-2164-13-410 1471-2164 https://doaj.org/article/c0e60ea1870c49868c8a31aa7963af6f BMC Genomics, Vol 13, Iss 1, p 410 (2012) Biotechnology TP248.13-248.65 Genetics QH426-470 article 2012 ftdoajarticles https://doi.org/10.1186/1471-2164-13-410 2022-12-31T08:46:02Z Abstract Background Genetic selection of Atlantic salmon families better adapted to alternative feed formulations containing high levels of vegetable ingredients has been suggested to ensure sustainable growth of aquaculture. The present study aimed to identify molecular pathways that could underlie phenotypic differences in flesh n-3 long-chain polyunsaturated fatty acid (LC-PUFA) levels when fish are fed vegetable oil diets. Liver transcriptome was analyzed and compared in four families presenting higher or lower n-3 LC-PUFA contents at two contrasting flesh total lipid levels. Results The main effect of n-3 LC-PUFA contents was in the expression of immune response genes (38% of all significantly affected genes), broadly implicated in the modulation of inflammatory processes and innate immune response. Although genetic evaluations of traits used in the breeding program revealed that the chosen families were not balanced for viral disease resistance, this did not fully explain the preponderance of immune response genes in the transcriptomic analysis. Employing stringent statistical analysis no lipid metabolism genes were detected as being significantly altered in liver when comparing families with high and low n-3 LC-PUFA flesh contents. However, relaxing the statistical analysis enabled identification of potentially relevant effects, further studied by RT-qPCR, in cholesterol biosynthesis, lipoprotein metabolism and lipid transport, as well as eicosanoid metabolism particularly affecting the lipoxygenase pathway. Total lipid level in flesh also showed an important effect on immune response and 8% of significantly affected genes related to lipid metabolism, including a fatty acyl elongase ( elovl2 ), an acyl carrier protein and stearoyl-CoA desaturase. Conclusions Inter-family differences in n-3 LC-PUFA content could not be related to effects on lipid metabolism, including transcriptional modulation of the LC-PUFA biosynthesis pathway. An association was found between flesh adiposity and n-3 LC-PUFA in ... Article in Journal/Newspaper Atlantic salmon Directory of Open Access Journals: DOAJ Articles BMC Genomics 13 1 410 |
institution |
Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
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language |
English |
topic |
Biotechnology TP248.13-248.65 Genetics QH426-470 |
spellingShingle |
Biotechnology TP248.13-248.65 Genetics QH426-470 Morais Sofia Taggart John B Guy Derrick R Bell J Tocher Douglas R Hepatic transcriptome analysis of inter-family variability in flesh n-3 long-chain polyunsaturated fatty acid content in Atlantic salmon |
topic_facet |
Biotechnology TP248.13-248.65 Genetics QH426-470 |
description |
Abstract Background Genetic selection of Atlantic salmon families better adapted to alternative feed formulations containing high levels of vegetable ingredients has been suggested to ensure sustainable growth of aquaculture. The present study aimed to identify molecular pathways that could underlie phenotypic differences in flesh n-3 long-chain polyunsaturated fatty acid (LC-PUFA) levels when fish are fed vegetable oil diets. Liver transcriptome was analyzed and compared in four families presenting higher or lower n-3 LC-PUFA contents at two contrasting flesh total lipid levels. Results The main effect of n-3 LC-PUFA contents was in the expression of immune response genes (38% of all significantly affected genes), broadly implicated in the modulation of inflammatory processes and innate immune response. Although genetic evaluations of traits used in the breeding program revealed that the chosen families were not balanced for viral disease resistance, this did not fully explain the preponderance of immune response genes in the transcriptomic analysis. Employing stringent statistical analysis no lipid metabolism genes were detected as being significantly altered in liver when comparing families with high and low n-3 LC-PUFA flesh contents. However, relaxing the statistical analysis enabled identification of potentially relevant effects, further studied by RT-qPCR, in cholesterol biosynthesis, lipoprotein metabolism and lipid transport, as well as eicosanoid metabolism particularly affecting the lipoxygenase pathway. Total lipid level in flesh also showed an important effect on immune response and 8% of significantly affected genes related to lipid metabolism, including a fatty acyl elongase ( elovl2 ), an acyl carrier protein and stearoyl-CoA desaturase. Conclusions Inter-family differences in n-3 LC-PUFA content could not be related to effects on lipid metabolism, including transcriptional modulation of the LC-PUFA biosynthesis pathway. An association was found between flesh adiposity and n-3 LC-PUFA in ... |
format |
Article in Journal/Newspaper |
author |
Morais Sofia Taggart John B Guy Derrick R Bell J Tocher Douglas R |
author_facet |
Morais Sofia Taggart John B Guy Derrick R Bell J Tocher Douglas R |
author_sort |
Morais Sofia |
title |
Hepatic transcriptome analysis of inter-family variability in flesh n-3 long-chain polyunsaturated fatty acid content in Atlantic salmon |
title_short |
Hepatic transcriptome analysis of inter-family variability in flesh n-3 long-chain polyunsaturated fatty acid content in Atlantic salmon |
title_full |
Hepatic transcriptome analysis of inter-family variability in flesh n-3 long-chain polyunsaturated fatty acid content in Atlantic salmon |
title_fullStr |
Hepatic transcriptome analysis of inter-family variability in flesh n-3 long-chain polyunsaturated fatty acid content in Atlantic salmon |
title_full_unstemmed |
Hepatic transcriptome analysis of inter-family variability in flesh n-3 long-chain polyunsaturated fatty acid content in Atlantic salmon |
title_sort |
hepatic transcriptome analysis of inter-family variability in flesh n-3 long-chain polyunsaturated fatty acid content in atlantic salmon |
publisher |
BMC |
publishDate |
2012 |
url |
https://doi.org/10.1186/1471-2164-13-410 https://doaj.org/article/c0e60ea1870c49868c8a31aa7963af6f |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_source |
BMC Genomics, Vol 13, Iss 1, p 410 (2012) |
op_relation |
http://www.biomedcentral.com/1471-2164/13/410 https://doaj.org/toc/1471-2164 doi:10.1186/1471-2164-13-410 1471-2164 https://doaj.org/article/c0e60ea1870c49868c8a31aa7963af6f |
op_doi |
https://doi.org/10.1186/1471-2164-13-410 |
container_title |
BMC Genomics |
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13 |
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1 |
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410 |
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1766362575310684160 |