Expression of genes involved in lipid metabolism in the muscle of beef cattle fed soybean or rumen-protected fat, with or without monensin supplementation

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MetadadosDescriçãoIdioma
Autor(es): dc.creatorOliveira, D. M.-
Autor(es): dc.creatorChalfun-Junior, A.-
Autor(es): dc.creatorChizzotti, M. L.-
Autor(es): dc.creatorBarreto, H. G.-
Autor(es): dc.creatorCoelho, T. C.-
Autor(es): dc.creatorPaiva, L. V.-
Autor(es): dc.creatorCoelho, C. P.-
Autor(es): dc.creatorTeixeira, P. D.-
Autor(es): dc.creatorSchoonmaker, J. P.-
Autor(es): dc.creatorLadeira, M. M.-
Data de aceite: dc.date.accessioned2026-02-09T12:13:02Z-
Data de disponibilização: dc.date.available2026-02-09T12:13:02Z-
Data de envio: dc.date.issued2017-02-17-
Data de envio: dc.date.issued2017-02-17-
Data de envio: dc.date.issued2014-12-
Fonte completa do material: dc.identifierhttps://repositorio.ufla.br//handle/1/12302-
Fonte completa do material: dc.identifierhttps://academic.oup.com/jas/article-abstract/92/12/5426/4703265?redirectedFrom=fulltext-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1156807-
Descrição: dc.descriptionDegree of unsaturation of fatty acids, which is influenced by lipid source and level of metabolism in the rumen, is a major determinant in how dietary lipids affect genes that regulate beef marbling. A total of 28 Red Norte bulls with an initial live weight of 361 ± 32 kg (P > 0.05) were used in a completely randomized experimental design to analyze the expression of genes that are involved in lipid metabolism in the longissimus dorsi (LD) when diets contained soybean grain or rumen-protected fat, with or without monensin. Treatments were arranged as a 2 × 2 factorial, with 4 treatments and 7 replicates per treatment. Half of the animals that received soybean or rumen-protected fat were supplemented with 230 mg head−1 d−1 of monensin. Gene expression was analyzed by reverse-transcription quantitative PCR (RT-qPCR). Expression of sterol regulatory element-binding protein-1c (SREBP-1c) in the LD muscle was not affected by lipid source or monensin (P > 0.05). There was an interaction effect (P < 0.05) between lipid source and monensin for peroxisome proliferator-activated receptor α (PPAR-α) and stearoyl-CoA desaturase (SCD) expression, where greater gene expression was found in animals fed soybean plus monensin and the lower gene expression was found in animals fed rumen-protected fat plus monensin. Expression of lipoprotein lipase (LPL) and fatty acid-binding protein 4 (FABP4) were greater (P < 0.05) in the LD muscle of animals fed soybean. Monensin had no effect on LPL and FABP4 expression when soybean without monensin was fed, but when rumen-protected fat was fed, monensin increased LPL expression and decreased FABP4 expression (P < 0.05). Linoleic and arachidonic acids had negative correlations (P < 0.05) with the expression of PPAR-α, SCD, FABP4, and LPL genes. PPAR-α gene expression was not correlated with SREBP-1c but was positively correlated with SCD, FABP4, LPL, and glutathione peroxidase (GPX1) gene expression (P < 0.001). Lipid sources and monensin interact and alter the expression of PPAR-α, SCD, acetyl CoA carboxylase α (ACACA), LPL, FABP4, and GPX1. These changes in gene expression were most associated with arachidonic and α-linolenic acids and the ability of lipid sources and monensin to increase these fatty acids in tissues.-
Idioma: dc.languageen-
Publicador: dc.publisherAmerican Society of Animal Science-
Direitos: dc.rightsrestrictAccess-
???dc.source???: dc.sourceJournal of Animal Science-
Palavras-chave: dc.subjectIonophores-
Palavras-chave: dc.subjectmRNA-
Palavras-chave: dc.subjectOilseeds-
Palavras-chave: dc.subjectPeroxisome proliferator-activated receptor α (PPAR-α)-
Palavras-chave: dc.subjectSterol regulatory element-binding protein-1c (SREBP-1c)-
Título: dc.titleExpression of genes involved in lipid metabolism in the muscle of beef cattle fed soybean or rumen-protected fat, with or without monensin supplementation-
Tipo de arquivo: dc.typeArtigo-
Aparece nas coleções:Repositório Institucional da Universidade Federal de Lavras (RIUFLA)

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