Transcriptomal analysis revealed that the metabolism and structure of porcine Longissimus Dorsi muscle were changed by constant heat stress
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ABSTRACT:
ORGANISM(S): Sus scrofa
PROVIDER: GSE83280 | GEO | 2017/06/11
SECONDARY ACCESSION(S): PRJNA325481
REPOSITORIES: GEO
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Project description:To characterize the changes of miRNAs in skeletal muscle responding to heat stress, the miRNA expression profiles of longissimus dorsi muscles of pigs raised under constant heat stress (30°C, n=8) or control temperature (22 C, n=8) for 21 days were analyzed by Illumina deep sequencing. 58 differentially expressed miRNAs were identified with 30 down-regulated and 28 up-regulated and 63 differentially expressed target genes were predicted by miRNA-mRNA joint analysis. GO and KEGG analyses showed that the genes regulated by differentially expressed miRNAs were enriched in glucose metabolism, cytoskeletal structure and function, and stress response. Real-time PCR showed that the mRNA levels of PDK4, HSP90 and DES were significantly increased whereas those of SCD and LDH-A significantly decreased by heat exposure. The protein levels of CALM, DES and HIF1α were also significantly increased by constant heat. These results demonstrated that the change of miRNA expression in porcine longissimus dorsi muscle underlie the changes of muscle structure and metabolism in porcine skeletal muscle affected by constant heat stress. Characterize and compare expression profiling of the miRNA transcriptome in 2 groups of porcine skeletal muscle.
2015-12-09 | E-GEOD-75785 | biostudies-arrayexpress
Project description:To characterize the changes of miRNAs in skeletal muscle responding to heat stress, the miRNA expression profiles of longissimus dorsi muscles of pigs raised under constant heat stress (30°C, n=8) or control temperature (22 C, n=8) for 21 days were analyzed by Illumina deep sequencing. 58 differentially expressed miRNAs were identified with 30 down-regulated and 28 up-regulated and 63 differentially expressed target genes were predicted by miRNA-mRNA joint analysis. GO and KEGG analyses showed that the genes regulated by differentially expressed miRNAs were enriched in glucose metabolism, cytoskeletal structure and function, and stress response. Real-time PCR showed that the mRNA levels of PDK4, HSP90 and DES were significantly increased whereas those of SCD and LDH-A significantly decreased by heat exposure. The protein levels of CALM, DES and HIF1α were also significantly increased by constant heat. These results demonstrated that the change of miRNA expression in porcine longissimus dorsi muscle underlie the changes of muscle structure and metabolism in porcine skeletal muscle affected by constant heat stress.
2015-12-09 | GSE75785 | GEO
Project description:To identify transcriptional markers for beef traits related to meat tenderness and moisture, we measured the transcriptome of the Longissimus dorsi skeletal muscle in 10 Korean native cattle (KNC). We analyzed the correlation between the beef transcriptome and measurements of four different beef traits, shear force (SF), water holding capacity (WHC), cooking loss (CL), and loin eye area (LEA). We obtained non-overlapping and unique panels of genes showing strong correlations (|r| > 0.8) with SF, WHC, CL, and LEA, respectively. Functional studies of these genes indicated that SF was mainly related to energy metabolism, and LEA to rRNA processing. Interestingly, our data suggested that WHC is influenced by protein metabolism. Overall, the skeletal muscle transcriptome pointed to the importance of energy and protein metabolism in determining meat quality after the aging process. The panels of transcripts for beef traits may be useful for predicting meat tenderness and moisture. Experiment Overall Design: Gene expression profiles were correlated with beef traits measured at the same cattle.
2008-11-01 | E-GEOD-9256 | biostudies-arrayexpress
Project description:To identify transcriptional markers for beef traits related to meat tenderness and moisture, we measured the transcriptome of the Longissimus dorsi skeletal muscle in 10 Korean native cattle (KNC). We analyzed the correlation between the beef transcriptome and measurements of four different beef traits, shear force (SF), water holding capacity (WHC), cooking loss (CL), and loin eye area (LEA). We obtained non-overlapping and unique panels of genes showing strong correlations (|r| > 0.8) with SF, WHC, CL, and LEA, respectively. Functional studies of these genes indicated that SF was mainly related to energy metabolism, and LEA to rRNA processing. Interestingly, our data suggested that WHC is influenced by protein metabolism. Overall, the skeletal muscle transcriptome pointed to the importance of energy and protein metabolism in determining meat quality after the aging process. The panels of transcripts for beef traits may be useful for predicting meat tenderness and moisture.
2008-10-06 | GSE9256 | GEO
Project description:Western commercial pig breeds have been intensively selected, resulting in a sizeable, rapid, and efficient accretion of muscle but a reduction in meat quality. When compared with Western commercial pig breeds, Chinese indigenous pig breeds exhibited slower growth rates and reduced lean meat content but superior perceived meat quality. To study the factors that determine meat quality, we examined piglets of one Western commercial breed (Yorkshire) and one Chinese indigenous breed (Wannanhua) and sequenced the longissimus dorsi muscle using RNA-sequencing (RNA-seq). We analyzed their transcriptomes, focusing on identifying candidate genes that may influence porcine muscle growth, meat quality and adipose deposition. Gene ontology functional enrichment and pathway enrichment analyses identified differentially expressed genes primarily associated with glycolytic metabolism, biological processes of muscle development and signaling pathways related to fatty acid metabolism, growth and carcass traits. This finding suggests that the differentially expressed genes may play important roles in determining meat quality traits. Quantitative real-time reverse transcription-polymerase chain reaction (RT-PCR) confirmed the differential expression of twelve selected differentially expressed genes. This study identified a number of novel candidate genes for porcine meat quality and carcass traits that merit further investigation to elucidate the molecular mechanisms responsible for muscle growth and fat deposition.
2015-11-30 | GSE75045 | GEO
Project description:Intramuscular fat (IMF) content is an important trait closely correlated with meat quality, which is highly variable among swine breeds from diverse genetic backgrounds. In order to elucidate the molecular mechanism underlying porcine meat quality, we adopted RNA-sequencing to detect transcriptome in the longissimus dorsi muscle of Wei pigs (a Chinese indigenous breed) and Yorkshire pigs (a Western lean-type breed) with different IMF content. A total of 717 differentially expressed genes (DEGs) were identified in our study, with 323 up-regulated and 394 down-regulated genes in Wei pigs compared with Yorkshire pigs. GO analysis showed that DEGs significantly related to muscle proliferation and development, lipid storage and catabolic, extracellular matrix structural constituent, and neutral amino acid transmembrane transporter activity. Pathway analysis revealed that DEGs associated with fatty acid metabolism, steroid biosynthesis, glycerophospholipid metabolism, protein digestion and absorption, and amino acid metabolism. Quantitative real time PCR confirmed the differential expression of 11 selected DEGs from both pig breeds. The results provide useful information to investigate the transcriptional profiling in skeletal muscle of different pig breeds with divergent phenotypes, and several DEGs can be taken as functional candidate genes for affecting pork quality.
2017-05-20 | GSE99092 | GEO
Project description:In the last 20 years, there has been significant research towards defining the genetic basis of lipid metabolism and meat quality related traits in pigs. Nowadays, the study of the transcriptome and its regulatory mechanisms allows going far beyond in the genetic dissection of these complex traits. In present study, a genome-wide eQTL scan aiming to detect pig genome regions regulating levels of skeletal muscle mRNA expression has been performed. This study has been conducted on a commercial Duroc population where a number of QTL for muscle fat deposition and fatty acid composition had been detected. GeneChip Porcine Genome® arrays (Affymetrix) were used to determine the gene expression levels of gluteus medius samples from 105 Duroc pigs belonging to two groups with divergent phenotypes for fatness traits. This experimental design aimed to favour detection of eQTL affecting genes related to lipid metabolism and meat quality traits. The whole genome scan with a panel of 110 microsatellites allowed us detecting 613 genome-wide significant eQTL unequally distributed across the pig genome, SSC5 and SSC3 harbouring the highest number of eQTL. Moreover, 11 genome regions with eQTL affecting the expression levels of a high number of genes (eQTL hot spots) have been described. After mapping target probes and discarding low quality probes, a total of 59 cis- and 396 trans-acting eQTL were retained for further analyses. The functional classification showed that lipid-related GO terms were not the most enriched by the list of eQTL-regulated genes. However, a number of regulated genes functionally related to lipid metabolism and fat deposition traits were identified, and their functional relationship with these phenotypes were further investigated. With this purpose, eQTL results were integrated with 1) QTL linkage maps and 2) correlation data between phenotypes and gene expression levels. As a result, a comprehensive list of 29 positional and functional candidate genes was elaborated. These results represent a valuable contribution to the comprehension of genetic regulation of skeletal muscle individual gene expression in swine species, and a first step towards disentangling gene networks and molecular mechanisms involved in lipid metabolism and meat quality traits. 105 gluteus medius samples from 105 animals belonging to two groups of 53 and 52 animals each: HIGH group had higher carcass, plasma and muscle fat content; LOW group had lower carcass, plasma and muscle fat content
2010-12-16 | E-GEOD-26091 | biostudies-arrayexpress
Project description:Studies exploring the transcriptome of stress and its effects on meat quality are very limited, particularly in goats. Fifty-four male Spanish goats (8-mo old; BW = 29.7 ± 2.03 kg) were randomly subjected to one of three treatments (TRT; n = 18 goats / treatment): (i) transported for 180 min, (ii) transported for 30 min, or (iii) held in pens (control) to analyze the transcriptome of stress and meat quality in goats using RNA-seq technology. Blood samples were collected before and after treatment, and meat samples were collected after humane slaughter for stress hormone, meat quality (Longissimus dorsi), and transcriptomic analysis. Plasma epinephrine concentrations were higher (P < 0.01) in 180 min and 30 min groups compared to the control group; however, norepinephrine concentrations were not affected by the treatment. Muscle glycogen concentrations (15 min postmortem) were lower (P < 0.01) in both 30 min and 180 min groups compared to the control group. Calpastatin levels were higher (P < 0.01) in 180 min and 30 min groups than the control group. Warner-Bratzler shear force values of loin chops were the highest in the 180 min group (4 ± 0.15, kg), lowest in the control group (3.51 ± 0.10, kg), and intermediate in the 30 min group (3.78 ± 0.09, kg; P < 0.01) both at day 1 and day 6 aging time. Additionally, desmin levels of day 6 samples were lowest in the control group, highest in 180 min group, and intermediate in 30 min group (P < 0.05). RNA-seq results showed that a total of 10,633 genes were differentially expressed (5,194 up regulated; 5,439 down regulated) among all comparisons (blood and day 1 and day 6 muscle samples). Among these differentially expressed genes (DEGs), KLF9, AMPK, FOXO3, PTX3, GADD45, PTPN1, CASP7, MAPK4, HSPA12A, and JAK-STAT were probably associated with the effects of stress on skeletal muscle proteins and involved in biological process such as cellular response to corticosteroid stimulus, endoplasmic reticulum stress, insulin resistance, DNA repair, apoptosis, MAPK cascade and regulation of proteolysis. The KEGG analysis revealed that AMPK and JAK-SAT signaling pathways and autophagy were among the top 20 enriched pathways in our treatment comparisons. The results provide an understanding of the genes and pathways involved in stress responses and related changes in postmortem muscle metabolism and meat quality characteristics in goats.
2022-08-14 | GSE210823 | GEO
Project description:This study was aimed at examining the effects of long-term of heat-stress on the gene expression of skeletal muscle hypertrophy. Heat- and stream-generating (HSG) sheets were placed on thigh laterally. The HSG sheets (heat-stress) were applied 8-hrs/day, once a day, 4 days/weeks, for 10 weeks. A muscle biopsy was taken from the vastus lateralis muscle (2 cm depth) of the treated leg before and after the experiment. Oligonucleotide microarray revealed that genes related to ATP-synthesis, protein synthesis and the molecular chaperonic activity were increased by heat stress. These results suggest that heat-stress might be a useful countermeasure for muscular atrophy during aging. Overall design: Five subjects were applied by heat- and stream-generating (HSG) sheets for 10 weeks. Total RNAs obtained from the skeletal muscle before and after the experiment were used for the analysis.
2011-07-30 | E-GEOD-12474 | biostudies-arrayexpress
Project description:The aim of this study was to identify genes, gene clusters and networks involved in sexual dimorphism and in the response to nutritional restriction in porcine skeletal muscles, through the analysis of gene expression differences. Full sib Iberian piglets from three litters composed of two males and two females per family were randomly assigned to two dietary treatments which differed in the feeding level during 15 wk. At the end of the trial, 27 wk of age, significant phenotypic differences were detected between genders and between feeding levels for growth, fatness, fatty acid composition and primary cuts weights. RNA samples from two skeletal muscles, diaphragm and Psoas major, were hybridized with Affymetrix microarrays and the expression data were analyzed using a mixed model and a FDR<0.01. The successfully performed validations by qRT-PCR of six selected genes supported the reliability of our microarray results. Ina a first step, the main gene expression differences between both muscles were established, identifying 181 differentially expressed genes, which represented almost exclusively anatomical structural differences. The analysis between genders reported expression differences of 59 unique genes, mainly implicated in muscle growth and stress response, including well known genes, such as IGF1, apart from others potentially associated to meat quality such as ANKRD1. The analysis of the feeding level effect restriction reported up-regulation of 76 genes and down-regulation of other 60 genes. Functional annotation showed that the moderated nutritional restriction applied led to a reduced growth through down-regulation of key genes implicated in enhancing growth and up-regulation of genes implicated in inhibiting growth. Besides, the restriction led to an increase of muscular aminoacid metabolism and decrease of lipid metabolism as adaptive response. Changes in expression patterns of genes determining meat characteristics, such as PDK4 implicated in water holding, CTSD associated to muscle transformation during meat processing and SCD involved in the determination of fatty acids profiles, were also reported. Finally, we identify relevant expression differences in ADAM12, CA2, UCHL1 and ESRRG genes, which are involved in human obesity and have not been previously studied in pig. 16 skeletal muscle samples, diaphragm and psoas major, from eight animals at slaughter, 211 days old, four males and four females, four under high feeding level and four under 20% restriction.
2010-07-30 | E-GEOD-23324 | biostudies-arrayexpress