Project description:In this study, we generated whole genome bisulfite sequencing data of 2 samples for Bones in Holstein cattle. We analyzed the variations of DNA methylation among tissues compared to other tissues we generated before.
Project description:In this study, we generated whole genome bisulfite sequencing data of 19 samples for 13 tissues in Holstein cattle. We analyzed the variations of DNA methylation among tissues. In this study, we generated whole genome bisulfite sequencing data of 6 samples for 5 tissues in Hereford cattle. We analyzed the variations of DNA methylation among tissues.
Project description:DNA methylation is a key epigenetic modification in mammals, have essential and important roles in muscle development. Here, using cattle as a model, we investigate the systematic association between DNA methylation and muscle development. We sample longissimus thoracis tissues from a famous elite native breed of Chinese Qinchuan cattle living within comparable environments under fetal and adult stages. Using methylated DNA immunoprecipitation sequencing (MeDIP-Seq) , we generate and provide a genome-wide landscapes of DNA methylomes for muscle studies. The analysis shows global similarity and difference among fetal and adult stage and identifies the differentially methylated regions. The differentially methylated regions in promoters are highly associated with muscle development via expression repression of both known muscle-related genes and novel genes. This comprehensive map provides a solid basis for exploring epigenetic mechanisms of muscle growth and development. Examination of 2 different developmental stages of the Longissimus Muscle
Project description:Comprehensive analyses of tissues at single-cell level will benefit our understanding of genetic bases for complex traits. Here we present an initial effort of single-cell transcriptomic analyses of cattle ruminal epithelial cells during the rumen development. We obtained 5064 and 1372 cells from Holstein ruminal epithelial cells before and after weaning, respectively. We reported 6 cell types across their temporal and spatial distributions, which were partially correlated with rumen epithelium layer’s structures and functions. We also reported a distinct sets of cell markers for these cell types, for example, CRA1, HMMR, MKI67, and EZH2 for the dividing epithelial cells and the TGFB pathway and the keratin gene family for keratinized epithelial cells. Our proposed a cell lineage model may contribute to the understanding of cattle rumen epithelial proliferation and development.
Project description:Comprehensive analyses of tissues at the single-cell level will benefit our understanding of genetic bases for complex traits. We performed single-cell RNA sequencing (scRNA-seq) analyses of peripheral blood mononuclear cells (PBMCs) from Holstein cattle, investigating their cell types and responses to lipopolysaccharide (LPS) treatment in vitro. The responses to LPS treatment include innate immunity activation of monocytes, macrophages, and dendritic cells, as well as B cell proliferation. The innate immunity responses are featured with CCL2 and CXCL2 proinflammatory cytokines. We detected trait-relevant cell types and found that DEGs induced by LPS were significantly associated with many complex traits of economic value in Holstein.
Project description:We previously identified endothelial cell-selective adhesion molecule (ESAM) as a novel functional marker of hematopoietic stem cells (HSCs) in mice. To examine ESAM expression in human, we analyzed diverse HSC sources using flow cytometry. From mononuclear cells of collagenase-treated human hip bones, we obtained two ESAM positive populations in CD34(+) CD38(-) fraction, referred to as ESAM(High) and ESAM(Bright). Then we conducted microarray analyses comparing gene expression signatures between these two populations. Trabecular tissues of the femora were treated with collagenase IV and DNase. Mononuclear cells were collected, and CD34(+) CD38(-) ESAM(High) or ESAM(Bright) cells were sorted.
Project description:We previously identified endothelial cell-selective adhesion molecule (ESAM) as a novel functional marker of hematopoietic stem cells (HSCs) in mice. To examine ESAM expression in human, we analyzed diverse HSC sources using flow cytometry. From mononuclear cells of collagenase-treated human hip bones, we obtained two ESAM positive populations in CD34(+) CD38(-) fraction, referred to as ESAM(High) and ESAM(Bright). Then we conducted microarray analyses comparing gene expression signatures between these two populations.