Project description:Although the well-known importance of pig in agriculture, as well as a model for human biology, the miRNA catalog of pig has been largely undefined. Identification and preliminary characterization of adipose- and muscle-specific miRNAs would be a prerequisite for a thorough understanding of their roles in regulating adipose deposition and muscle growth. In the present study, we get insight into the miRNA transcriptome in eight adipose tissues, two skeletal muscles and cardiac muscle of pig using deep sequencing technology, and to elucidate their characteristic tissue-specific profiles and genomic context. Eleven small RNA libraries from eight adipose tissues, two skeletal muscle tissues and cardiac muscle of pig were sequenced.
Project description:Although the well-known importance of pig in agriculture, as well as a model for human biology, the miRNA catalog of pig has been largely undefined. Identification and preliminary characterization of adipose- and muscle-specific miRNAs would be a prerequisite for a thorough understanding of their roles in regulating adipose deposition and muscle growth. In the present study, we get insight into the miRNA transcriptome in eight adipose tissues, two skeletal muscles and cardiac muscle of pig using deep sequencing technology, and to elucidate their characteristic tissue-specific profiles and genomic context.
Project description:Obese and lean-type pig breeds show obvious differences in adipose deposition and muscle growth; however, the molecular mechanisms underlying this phenotypic variation remains unclear. Landrace (a leaner, Western breed), Rongchang (a fatty, Chinese breed) and Tibetan (a feral, indigenous Chinese breed that has not undergone artificial selection) pig breeds were used in this study. We collected eight diverse adipose tissues and two phenotypically distinct skeletal muscle tissues from three well-defined pig models with distinct fat rates, and studied mRNA expression differences among breeds, males and females, and tissues. These results highlight some possible candidate genes for porcine adipose deposition and muscle growth and provide some data on which to base further studies of the molecular basis of energy metabolism. The mRNA expression differences of eight diverse adipose tissues and two phenotypically distinct skeletal muscle tissues from three well-defined pig models with distinct fat rates are measured.
Project description:It is evident that epigenetic factors, especially DNA methylation, play essential roles in obesity development. To learn systematic association of DNA methylation to obesity, we used pig as a model, and sampled eight diverse adipose tissues and two distinct skeletal muscle tissues from three pig breeds with distinguished fat levels: the lean Landrace, the fatty Rongchang, and the feral Tibetan pig. We sequenced 180 methylated DNA immunoprecipitation (MeDIP) libraries, generated 1,381 Gbp sequence data, and provided a genome-wide DNA methylation map for pig adipose and muscle studies. The analysis showed global similarities and differences between breeds, genders and tissues, and identified the differentially methylated regions (DMRs) that are preferentially located in intermediate CpG promoters and CpG island shores. The DMRs in promoters are highly associated to obesity development. We also analyzed methylation and regulation of the known obesity-related genes and predicted novel candidate genes. The comprehensive map here provides a solid base for exploring epigenetic mechanisms of adipose deposition and muscle growth.
Project description:Obese and lean-type pig breeds show obvious differences in adipose deposition and muscle growth; however, the molecular mechanisms underlying this phenotypic variation remains unclear. Landrace (a leaner, Western breed), Rongchang (a fatty, Chinese breed) and Tibetan (a feral, indigenous Chinese breed that has not undergone artificial selection) pig breeds were used in this study. We collected eight diverse adipose tissues and two phenotypically distinct skeletal muscle tissues from three well-defined pig models with distinct fat rates, and studied mRNA expression differences among breeds, males and females, and tissues. These results highlight some possible candidate genes for porcine adipose deposition and muscle growth and provide some data on which to base further studies of the molecular basis of energy metabolism.
Project description:It is evident that epigenetic factors, especially DNA methylation, play essential roles in obesity development. To learn systematic association of DNA methylation to obesity, we used pig as a model, and sampled eight diverse adipose tissues and two distinct skeletal muscle tissues from three pig breeds with distinguished fat levels: the lean Landrace, the fatty Rongchang, and the feral Tibetan pig. We sequenced 180 methylated DNA immunoprecipitation (MeDIP) libraries, generated 1,381 Gbp sequence data, and provided a genome-wide DNA methylation map for pig adipose and muscle studies. The analysis showed global similarities and differences between breeds, genders and tissues, and identified the differentially methylated regions (DMRs) that are preferentially located in intermediate CpG promoters and CpG island shores. The DMRs in promoters are highly associated to obesity development. We also analyzed methylation and regulation of the known obesity-related genes and predicted novel candidate genes. The comprehensive map here provides a solid base for exploring epigenetic mechanisms of adipose deposition and muscle growth. We collected eight diverse adipose tissues and two phenotypically distinct skeletal muscle tissues from three well-defined pig models with distinct fat rates, and studied genome-wide DNA methylation differences among breeds, males and females, and tissues.
Project description:Artificial selection has resulted in animal breeds with extreme phenotypes. As an organism is made up of many different tissues and organs, each with its own genetic programme, it is pertinent to ask what are the relative contributions of breed or sex when assessed across tissues. Are all tissues equally affected by breed or sex? How relevant is tissue in terms of total transcriptome variability? Experiment Overall Design: In order to gain insight on these issues, we have microarrayed 16 different tissues hybridization on Affymetrix microarrays from four animals of the extreme pig breeds Large White and Iberian, two males and two females
Project description:Domestication of pig results in modifications of many traits, including fatness traits, which are important in pig production since they have effect on meat quality, fattening efficiency, reproduction and immunity.In this study, we investigate 3D genome organization and transcriptomic characterization of adipose tissues (ATs) between wild boars and Bama pig, a typical indigenous domestic pig in China, to uncover molecular mechanisms of fatness-phenotypic shifts.
Project description:Landscape of chromatin accessibility across tissues and developmental stages is essential to elucidate the transcriptional regulation in various biological processes and phenotypes. However, the chromatin accessibility profiles of multiple tissues in newborn pigs and across porcine liver development have been seldomly investigated. Here, we profiled open chromatin maps and transcriptional features of the heart, kidney, liver, lung, skeletal muscle, and spleen tissues in newborn pigs and that of porcine liver tissue at suckling and adult stages using ATAC-seq and rRNA-depleted RNA-seq, respectively. Employing a union set of protein coding genes (PCGs) and two kinds of transcripts (lncRNAs and TUCPs), we obtained a comprehensive annotation of consensus ATAC-seq peaks for each tissue or developmental stage. The PCGs with tissue-specific accessible promoters, as expected, had active transcription and were relevant to tissue-specific functions. Other non-coding tissue-specific peaks were involved in both physical activities and morphogenesis in the neonatal tissues. We also characterized stage-specific peaks and observed a close association between dynamic chromatin accessibility and hepatic function transition during liver postnatal development. Overall, this study expands the understanding of epigenetic regulation in mammalian tissue functions and organ development, which can benefit both economic trait improvement and better biomedical use of pigs.