Data/hora: 21/06/2024 18:58:19

Biblioteca(s): | Embrapa Rondônia.
Data corrente: | 14/08/2013
Data da última atualização: | 14/08/2013
Autoria: | AKBAR, H.; SCHMITT, E.; BALLOU, M. A.; CORRÊA, M. N.; DEPETERS, E. J.; LOOR, J. J.
Afiliação: | haji Akbar, University of illinois, Urbana; EDUARDO SCHMITT, CPAF-RO; Michael A. Ballou, Texas Tech University; Marcio N. Corrêa, NUPeeC, UFPel; Edward J. DePeter, University of California; Juan J. Loor, University of illinois, Urbana.
Título: | Dietary Lipid During Late-pregnancy and early-Lactation to Manipulate Metabolic and Inflammatory Gene Network Expression in Dairy Cattle Liver with a Focus on PPARs.
Ano de publicação: | 2013
Fonte/Imprenta: | Gene Regulation and Systems Biology, v. 7, p. 103?123, 2013.
Idioma: | Inglês
Conteúdo: | Polyunsaturated (PUFA) long-chain fatty acids (LCFAs) are more potent in eliciting molecular and tissue functional changes in monogastrics than saturated LCFA. From &#8722;21 through 10 days relative to parturition dairy cows were fed no supplemental LCFA (control), saturated LCFA (SFAT; mainly 16:0 and 18:0), or fish oil (FISH; high-PUFA). Twenty-seven genes were measured via quantitative RT-PCR in liver tissue on day &#8722;14 and day 10. Expression of nuclear receptor co-activators (CARM1, MED1), LCFA metabolism (ACSL1, SCD, ACOX1), and inflammation (IL6, TBK1, IKBKE) genes was lower with SFAT than control on day &#8722;14. Expression of SCD, however, was markedly lower with FISH than control or SFAT on both &#8722;14 and 10 days. FISH led to further decreases in expression on day 10 of LCFA metabolism (CD36, PLIN2, ACSL1, ACOX1), intracellular energy (UCP2, STK11, PRKAA1), de novo cholesterol synthesis (SREBF2), inflammation (IL6, TBK1, IKBKE), and nuclear receptor signaling genes (PPARD, MED1, NRIP1). No change in expression was observed for PPARA and RXRA. The increase of DGAT2, PLIN2, ACSL1, and ACOX1 on day 10 versus &#8722;14 in cows fed SFAT suggested upregulation of both beta-oxidation and lipid droplet (LD) formation. However, liver triacylglycerol concentration was similar among treatments. The hepatokine FGF21 and the gluconeogenic genes PC and PCK1 increased markedly on day 10 versus &#8722;14 only in controls. At the levels supplemented, the change in the profile of metabolic genes after parturition in cows fed saturated fat suggested a greater capacity for uptake of fatty acids and intracellular handling without excessive storage of LD.
Palavras-Chave: | Fat supplementation; Hepatic gene network; Rede de gene hepática; Suplementação de gordura; Vacas leiteiras.
Thesaurus Nal: | dairy cows.
Categoria do assunto: | L Ciência Animal e Produtos de Origem Animal
Registro original: | Embrapa Rondônia (CPAF-RO)
Exemplares: | CPAF-RO - (16719-1) - UPC - AP - DD -  -  -  - DIS