Polymorphism in the ELOVL6 gene is associated with a major QTL effect on fatty acid composition in pigs.

<h4>Background</h4>The ELOVL fatty acid elongase 6 (ELOVL6), the only elongase related to de novo lipogenesis, catalyzes the rate-limiting step in the elongation cycle by controlling the fatty acid balance in mammals. It is located on pig chromosome 8 (SSC8) in a region where a QTL affec...

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Autores principales:	Jordi Corominas, Yuliaxis Ramayo-Caldas, Anna Puig-Oliveras, Dafne Pérez-Montarelo, Jose L Noguera, Josep M Folch, Maria Ballester
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2013
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/e3b4903a872444179792bd8dea3cc9ef
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spelling	oai:doaj.org-article:e3b4903a872444179792bd8dea3cc9ef2021-11-18T08:01:37ZPolymorphism in the ELOVL6 gene is associated with a major QTL effect on fatty acid composition in pigs.1932-620310.1371/journal.pone.0053687https://doaj.org/article/e3b4903a872444179792bd8dea3cc9ef2013-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23341976/?tool=EBIhttps://doaj.org/toc/1932-6203<h4>Background</h4>The ELOVL fatty acid elongase 6 (ELOVL6), the only elongase related to de novo lipogenesis, catalyzes the rate-limiting step in the elongation cycle by controlling the fatty acid balance in mammals. It is located on pig chromosome 8 (SSC8) in a region where a QTL affecting palmitic, and palmitoleic acid composition was previously detected, using an Iberian x Landrace intercross. The main goal of this work was to fine-map the QTL and to evaluate the ELOVL6 gene as a positional candidate gene affecting the percentages of palmitic and palmitoleic fatty acids in pigs.<h4>Methodology and principal findings</h4>The combination of a haplotype-based approach and single-marker analysis allowed us to identify the main, associated interval for the QTL, in which the ELOVL6 gene was identified and selected as a positional candidate gene. A polymorphism in the promoter region of ELOVL6, ELOVL6:c.-533C>T, was highly associated with the percentage of palmitic and palmitoleic acids in muscle and backfat. Significant differences in ELOVL6 gene expression were observed in backfat when animals were classified by the ELOVL6:c.-533C>T genotype. Accordingly, animals carrying the allele associated with a decrease in ELOVL6 gene expression presented an increase in C16:0 and C16:1(n-7) fatty acid content and a decrease of elongation activity ratios in muscle and backfat. Furthermore, a SNP genome-wide association study with ELOVL6 relative expression levels in backfat showed the strongest effect on the SSC8 region in which the ELOVL6 gene is located. Finally, different potential genomic regions associated with ELOVL6 gene expression were also identified by GWAS in liver and muscle, suggesting a differential tissue regulation of the ELOVL6 gene.<h4>Conclusions and significance</h4>Our results suggest ELOVL6 as a potential causal gene for the QTL analyzed and, subsequently, for controlling the overall balance of fatty acid composition in pigs.Jordi CorominasYuliaxis Ramayo-CaldasAnna Puig-OliverasDafne Pérez-MontareloJose L NogueraJosep M FolchMaria BallesterPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 8, Iss 1, p e53687 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jordi Corominas Yuliaxis Ramayo-Caldas Anna Puig-Oliveras Dafne Pérez-Montarelo Jose L Noguera Josep M Folch Maria Ballester Polymorphism in the ELOVL6 gene is associated with a major QTL effect on fatty acid composition in pigs.
description	<h4>Background</h4>The ELOVL fatty acid elongase 6 (ELOVL6), the only elongase related to de novo lipogenesis, catalyzes the rate-limiting step in the elongation cycle by controlling the fatty acid balance in mammals. It is located on pig chromosome 8 (SSC8) in a region where a QTL affecting palmitic, and palmitoleic acid composition was previously detected, using an Iberian x Landrace intercross. The main goal of this work was to fine-map the QTL and to evaluate the ELOVL6 gene as a positional candidate gene affecting the percentages of palmitic and palmitoleic fatty acids in pigs.<h4>Methodology and principal findings</h4>The combination of a haplotype-based approach and single-marker analysis allowed us to identify the main, associated interval for the QTL, in which the ELOVL6 gene was identified and selected as a positional candidate gene. A polymorphism in the promoter region of ELOVL6, ELOVL6:c.-533C>T, was highly associated with the percentage of palmitic and palmitoleic acids in muscle and backfat. Significant differences in ELOVL6 gene expression were observed in backfat when animals were classified by the ELOVL6:c.-533C>T genotype. Accordingly, animals carrying the allele associated with a decrease in ELOVL6 gene expression presented an increase in C16:0 and C16:1(n-7) fatty acid content and a decrease of elongation activity ratios in muscle and backfat. Furthermore, a SNP genome-wide association study with ELOVL6 relative expression levels in backfat showed the strongest effect on the SSC8 region in which the ELOVL6 gene is located. Finally, different potential genomic regions associated with ELOVL6 gene expression were also identified by GWAS in liver and muscle, suggesting a differential tissue regulation of the ELOVL6 gene.<h4>Conclusions and significance</h4>Our results suggest ELOVL6 as a potential causal gene for the QTL analyzed and, subsequently, for controlling the overall balance of fatty acid composition in pigs.
format	article
author	Jordi Corominas Yuliaxis Ramayo-Caldas Anna Puig-Oliveras Dafne Pérez-Montarelo Jose L Noguera Josep M Folch Maria Ballester
author_facet	Jordi Corominas Yuliaxis Ramayo-Caldas Anna Puig-Oliveras Dafne Pérez-Montarelo Jose L Noguera Josep M Folch Maria Ballester
author_sort	Jordi Corominas
title	Polymorphism in the ELOVL6 gene is associated with a major QTL effect on fatty acid composition in pigs.
title_short	Polymorphism in the ELOVL6 gene is associated with a major QTL effect on fatty acid composition in pigs.
title_full	Polymorphism in the ELOVL6 gene is associated with a major QTL effect on fatty acid composition in pigs.
title_fullStr	Polymorphism in the ELOVL6 gene is associated with a major QTL effect on fatty acid composition in pigs.
title_full_unstemmed	Polymorphism in the ELOVL6 gene is associated with a major QTL effect on fatty acid composition in pigs.
title_sort	polymorphism in the elovl6 gene is associated with a major qtl effect on fatty acid composition in pigs.
publisher	Public Library of Science (PLoS)
publishDate	2013
url	https://doaj.org/article/e3b4903a872444179792bd8dea3cc9ef
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Polymorphism in the ELOVL6 gene is associated with a major QTL effect on fatty acid composition in pigs.

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