Liver transcriptomic and plasma metabolic profile of fattening lambs is modified by feed restriction during the suckling period.
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PROVIDER: PRJNA418946 | ENA |
REPOSITORIES: ENA
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Project description:Purpose: The present study was designed to identify both differentially expressed (DE) genes in the liver tissues of fattening Merino lambs and differences in metabolites accumulated in plasma, thus trying to identify modified metabolic pathways as a consequence of milk restriction during the suckling period. Methods: Twenty-four male Merino lambs were assigned to 2 different groups (n=12 per dietary treatment). The first group (ad libitum, ADL) was kept permanently with the dams whereas the other group (restricted, RES) was milk restricted. When they reached 15 kg of live body weight, all the lambs were offered the same complete pelleted diet at the same level to ensure no differences in dry matter intake. All the lambs were slaughtered with 27 kg. For transcriptomic analysis, 4 liver samples representative from each group (8 samples in total) were selected for RNA sequencing methodology (RNA-seq). Results: 38 DE annotated genes were identified by RNA-seq, with 23 DE genes being down-regulated and 15 up-regulated in the liver of RES relative to the ADL group (P < 0.10). In general, those genes and pathways involved in protein synthesis or protease inhibitors were down-regulated in the RES group, whereas those related to proteolytic degradation were up-regultated, thus suggesting a higher catabolism of proteins in these lambs. Contrarily, RES lambs showed over-expression of xenobiotic metabolism pathways, whereas those genes related to β-oxidation of fatty acids were down expressed. Conclusions: According to the data obtained, early feed restriction during the suckling period of Merino lambs promoted long-term effects on hepatic transcriptomic profile and plasma metabolic profile wich might have modified fatty acids metabolism, catabolism of proteins and detoxification of xenobiotics, thus reducing feed efficiency of fattening period.
2018-05-15 | GSE107064 | GEO
Project description:Purpose: The present study was designed to identify both differentially expressed (DE) genes and differences in proteins accumulated in the liver tissues of suckling female lambs, thus trying to identify modified metabolic pathways as a consequence of milk restriction during the suckling period. Methods: Forty Assaf lambs (average BW 4.7 kg) were penned individually, twenty of them were fed milk replacer (200 g dry matter/L) ad libitum (ADL; 192 mL/kg LBW) whereas the other group (restricted, RES) only received 120 mL/kg LBW. When they were 35 days old, four animals per group were slaughtered (8 lambs in total) and a piece of liver was excised for transcriptomic analysis. The liver transcriptome analysis was carried out using RNA sequencing methodology (RNA-seq). Results: 386 DE genes were identified by RNA-seq, 198 of them being annotated genes in the KEGG pathway. Positive values of log2-fold change (log2FC) indicated that 210 genes were up-regulated in the liver of RES relative to the ADL group, whereas negative log2FC values denoted the down-regulation of 176 genes (P < 0.05). Conclusions: According to the data obtained, a restricted milk intake during the suckling period of replacement lambs affects hepatic transcriptome and proteome associated with an altered metabolism of lipids and proteins, thus reducing feed efficiency of replacement period.
2018-12-16 | GSE110192 | GEO
Project description:Samples of perirenal fat tissue from 8 Assaf breed suckling lambs. These animals were selected from a larger group of 17 Assaf suckling lambs for which carcass traits were measured. The 8 selected lambs were those showing the highest and the lowest values, from the larger group, for the percentage of perirenal and cavitary fat relative to the half carcass weight. Hence, considering the values for this trait, we defined the High-PF group (n = 4; average: 3.23 ± 0,.47) and the Low-PF group (n = 4; 1.65 ± 0,.16), respectively.
2023-04-25 | E-MTAB-11839 | biostudies-arrayexpress
Project description: Not available
| S-EPMC6140908 | biostudies-other
Project description:In sheep, differences were observed regarding fat accumulation and fatty acid composition between males and females, which may impact the quality and organoleptic characteristics of the meat. The analysis of omics technologies is a relevant approach for investigating biological and genetic mechanisms associated with complex traits. Here, the perirenal tissue of six male and six female Assaf suckling lambs was evaluated using RNA sequencing.
2022-10-12 | E-MTAB-12130 | biostudies-arrayexpress
Project description:Investigate the genome-wide DNA methylation changes in the mouse hypothalamus during the suckling period.
2012-05-01 | GSE32475 | GEO
Project description:The aim of this study was to perform a comparative analysis of the perirenal fat transcriptomes of suckling lambs from two breeds with different growth and carcass characteristics. The perirenal fat tissue from 14 suckling lambs (Assaf= 8, Churra= 6) was used for the RNA-Seq analysis. The functional enrichment analysis of the 670 highly expressed genes (>150 fragments per kilobase of exon per million fragments mapped) in the perirenal fat transcriptome of both breeds revealed that the majority of these genes were involved in energy processes. The differential expression analysis performed identified 373 differentially expressed genes (DEGs) between the two compared breeds. In Assaf lambs, DEGs were enriched in Gene Ontology (GO) biological processes related to fatty-acid oxidation, while in Churra lambs, the majority of the significantly enriched GO terms were related to cholesterol synthesis, which suggests that upregulated DEGs in Assaf lambs are implicated in fat burning, while the Churra upregulated DEGs are linked to fat accumulation.
2018-07-18 | GSE108314 | GEO
Project description:Investigate the genome-wide DNA methylation changes in the mouse hypothalamus during the suckling period. Hypothalami were collected from new born (P0) mice, or mice of 21 day-old (P21). Two-color experiment was performed as paired comparison of P21 vs. P0 with two biological replicates. Genome-wide DNA methylation changes from P0 to P21 were detected by MSAM. As a brief description of the MSAM: 500ng of genomic DNA was serially digested with SmaI and XmaI followed by an adaptor ligation and adaptor mediated PCR amplification and then cohybridization.
2012-04-30 | E-GEOD-32475 | biostudies-arrayexpress
Project description:Gene expression was analysed in the colon and brain of normal rat pups from late prenatal through early postnatal development. Tissue was isolated from pups one day prior to the anticipated date of birth and throughout the suckling period until the end of weaning.
2009-12-18 | GSE18133 | GEO
Project description:The common practise of artificially rearing some lambs from prolific meat breeds of sheep constitutes a welfare issue due to increased mortality rates and negative health issues. In this multidisciplinary study, we investigated the possible short and mid-term advantages of artificially feeding fresh ewe’s milk instead of commercial milk replacer on lambs’ growth, health and welfare. Romane lambs were either separated from their mothers on D3 and fed with Lacaune ewes’ milk (LAC, n=13) or milk replacer (REP, N=15), or they were reared by their mothers (MOT, n=15). On D45, they were weaned, gathered in single sex groups until the end of the study on D150. Lamb performance and biomarkers of overall health were assessed by measuring: growth, dirtiness of the perianal area, enteric pathogens in the faeces, total antioxidant status and redox status assessed by plasma reduced (GSH)/oxidized (GSSG) glutathione ratio, and immune response after vaccination against chlamydiosis. As an exploratory approach, blood cell transcriptomic profiles were also investigated. Last, Qualitative Behaviour Assessment was performed as an integrated welfare criteria. LAC and REP never differed in their average daily gain but grew less than MOT lambs in the early suckling period and just after weaning. No effect was detected afterwards. On D30, LAC and REP lambs had lower total antioxidant and higher redox status than MOT lambs but did not differ among themselves. LAC and MOT had a cleaner perianal area than REP lambs on D21, while faecal pathogen infection did not vary between the treatment groups. After vaccination, LAC also had a stronger immune response on D90 compared to REP lambs. Transcriptome analysis performed on D150 showed differential gene expression, mainly in relation to inflammatory, immune and cell cycle response, between male lambs of the LAC group and those of the MOT and REP groups. Based on Qualitative Behaviour Assessment, LAC lambs never differed from MOT lambs in their general activity and varied from REP only on D21; REP lambs were always more agitated than MOT lambs. In conclusion, artificial milk feeding impaired early growth rate, health, and emotional state mainly during the milk feeding period and at weaning. Feeding artificially reared lambs with fresh ewe's milk partly mitigated some of the negative effects induced by milk replacer but without achieving the full benefit of being reared by the mother.
2020-11-23 | GSE131763 | GEO