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Metabolomics,Unknown,Transcriptomics,Genomics,Proteomics

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Effects of selection on residual feed intake and diet on gene expression in pig subcutaneous adipose tissue

ABSTRACT: Transcriptional profiling in subcutaneous adipose tissue of 48 pigs aged (132 days of age) originated from two lines divergently selected for residual feed intake (RFI) : low-RFI pigs (RFIneg), high-RFI pigs (RFIpl). Both lines were offered isocaloric and isoproteic diets with contrasted energy source and nutrients: low fat, low fiber (LF) diet or a high fat, high fiber (HF)diet during 10 weeks. Effects of RFI selection, diet and interaction between diet and line were investigated. Four experimental groups: low-RFI pigs fed high fat, high fiber diet (HF_RFIneg), high-RFI pigs fed high fat, high fiber diet(HF_RFIpl), low-RFI pigs fed low fat, low fiber diet (LF_RFIneg) and high-RFI pigs fed low fat, low fiber diet(LF_RFIpl). 12 pigs per condition. One replicate per array.

ORGANISM(S): Sus scrofa

SUBMITTER: Annie Vincent

PROVIDER: E-GEOD-70836 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Molecular alterations induced by a high-fat high-fiber diet in porcine adipose tissues: variations according to the anatomical fat location.

Gondret Florence F Vincent Annie A Houée-Bigot Magalie M Siegel Anne A Lagarrigue Sandrine S Louveau Isabelle I Causeur David D

BMC genomics 20160218

<h4>Background</h4>Changing the energy and nutrient source for growing animals may be an effective way of limiting adipose tissue expansion, a response which may depend on the genetic background of the animals. This study aims to describe the transcriptional modulations present in the adipose tissues of two pig lines divergently selected for residual feed intake which were either fed a high-fat high-fiber (HF) diet or an isocaloric low-fat high-starch diet (LF).<h4>Results</h4>Transcriptomic ana ...[more]

PMID: 26892011

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Effect of selection on residual feed intake on gene expression in porcine liver (115 kg body weight)

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Transcriptional profiling of response to acute caloric restriction in liver and fat of pigs differing in feed efficiency

Project description:Residual feed intake (RFI) is a measure of feed efficiency, where low RFI denotes high feed efficiency. Caloric restriction (CR) is associated with feed efficiency in livestock species and to human health benefits such as longevity and cancer prevention. We have developed pig lines that differ in RFI and are interested to identify the genes and pathways that underlie feed efficiency. Prepubertal Yorkshire gilts with low RFI (n=10) or high RFI (n=10) were fed ad libitum or at 80% of maintenance for eight days. We measured serum metabolites and generated transcriptional profiles of liver and subcutaneous adipose tissue. 6,114 genes in fat and 305 genes in liver were differentially expressed (DE) in response to CR and 311 in fat and 147 in liver were DE due to RFI differences. Pathway analyses of CR-induced DE genes indicated a switch to a conservation mode of energy by down-regulating lipogenesis and steroidogenesis in both liver and fat. Interestingly, CR in pigs altered expression of genes in immune and cell cycle/apoptotic pathways in fat, which may explain part of the CR-driven lifespan enhancement. In-silico analysis of transcription factors revealed ESR1 as a putative regulator of the adaptive response to CR and several targets of ESR1 in our DE fat genes were annotated as cell cycle/apoptosis genes. Lipid metabolic pathway was overrepresented by down-regulated genes due to both CR and low RFI. We propose a common energy conservation mechanism, which may be controlled by PPARA, PPARG, and/or CREB in both CR and feed efficient pigs. Prepubertal Yorkshire gilts with low RFI (n=10) or high RFI (n=10) were fed ad libitum or at 80% of maintenance for eight days in 2 x 2 complete factorial arrangement.

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