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.
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.
Project description:Transcriptomal analysis revealed that the metabolism and structure of porcine Longissimus Dorsi muscle were changed by constant heat stress
Project description:Skeletal muscle were collected from pigs treated in the control group, the Lys deficiency group and the Lys rescue group. Then, the samples were analyzed by LC-MSMS.
Project description:To obtain an overview of the transcriptome landscape in developing pig skeletal muscle, 81 high-quality transcriptome libraries that covered 27 developmental stages (3 biological replicates per stage) in pig skeletal muscle were produced by strand-specific rRNA-depleted total RNA sequencing (RNA-seq). We generated 8.59 billion paired-end reads (150 bp × 2) covering 1.24 Tb of sequence for RNA-seq.
