Project description:Dosage compensation restores a balanced network of gene expression between autosomes and sex chromosomes in males (XY) and females (XX). In mammals, this is achieved by doubling the expression of X-linked genes in both sexes, together with X inactivation in females. X up-regulation may be controlled by DNA sequence based and/or epigenetic mechanisms that double the X output potentially in response to an autosomal counting factor. Human triploids with either one or two active X chromosomes (Xa) provide a mean to test X chromosome expression in the presence of three sets of autosomes, which will help understand the underlying mechanisms of X up-regulation. We measured whole genome gene expression in human triploid cell cultures with either one or two active X. We found that overall X-linked gene expression is not tripled in the presence of three sets of autosomes. However, in triploid cells with a single active X chromosome, its expression is adjusted upward, presumably by an epigenetic mechanism that senses the active X-autosome ratio. Six human XXX triploid fibroblast clones with either one or two active X, three XYY triploid fibroblast cultures, and two male (XY) and two female (XaXi) control diploid fibroblast cultures were selected for RNA extraction and hybridization on Affymetrix whole genome expression arrays (HG-U133 2.0 plus chip). Probe labeling, array hybridization and scanning were done by the University of Washington Microarray Center.
Project description:Gene expression profiling of immortalized human mesenchymal stem cells with hTERT/E6/E7 transfected MSCs. hTERT may change gene expression in MSCs. Goal was to determine the gene expressions of immortalized MSCs.
Project description:Transcriptional profiling of human mesenchymal stem cells comparing normoxic MSCs cells with hypoxic MSCs cells. Hypoxia may inhibit senescence of MSCs during expansion. Goal was to determine the effects of hypoxia on global MSCs gene expression.
Project description:The parasitoid wasp Nasonia vitripennis is a major insect model for morphology, behavior, and genetics. It has haplodiploid sex determination: unfertilized eggs develop into haploid males and fertilized eggs develop into diploid females. Additionally, polyploids (diploid males, triploid females) occur in Nasonia, representing gene expression mechanisms regulating sexual maintenance outside of standard haplodiploidy. Here, we generated a transcriptomic atlas for N. vitripennis across two tissues (head and abdomen) for typical haploid males and diploid females and polyploid diploid males and triploid females. These data are a resource for analyses on transcriptomic differences across sex, tissue type, ploidy, strain, and temporal change.
Project description:The parasitoid wasp Nasonia vitripennis is a major insect model for morphology, behavior, and genetics. It has haplodiploid sex determination: unfertilized eggs develop into haploid males and fertilized eggs develop into diploid females. Additionally, polyploids (diploid males, triploid females) occur in Nasonia, representing gene expression mechanisms regulating sexual maintenance outside of standard haplodiploidy. Here, we generated a transcriptomic atlas for N. vitripennis across two tissues (head and abdomen) for typical haploid males and diploid females and polyploid diploid males and triploid females. These data are a resource for analyses on transcriptomic differences across sex, tissue type, ploidy, strain, and temporal change.
Project description:The parasitoid wasp Nasonia vitripennis is a major insect model for morphology, behavior, and genetics. It has haplodiploid sex determination: unfertilized eggs develop into haploid males and fertilized eggs develop into diploid females. Additionally, polyploids (diploid males, triploid females) occur in Nasonia, representing gene expression mechanisms regulating sexual maintenance outside of standard haplodiploidy. Here, we generated a transcriptomic atlas for N. vitripennis across two tissues (head and abdomen) for typical haploid males and diploid females and polyploid diploid males and triploid females. These data are a resource for analyses on transcriptomic differences across sex, tissue type, ploidy, strain, and temporal change.
Project description:The parasitoid wasp Nasonia vitripennis is a major insect model for morphology, behavior, and genetics. It has haplodiploid sex determination: unfertilized eggs develop into haploid males and fertilized eggs develop into diploid females. Additionally, polyploids (diploid males, triploid females) occur in Nasonia, representing gene expression mechanisms regulating sexual maintenance outside of standard haplodiploidy. Here, we generated a transcriptomic atlas for N. vitripennis across two tissues (head and abdomen) for typical haploid males and diploid females and polyploid diploid males and triploid females. These data are a resource for analyses on transcriptomic differences across sex, tissue type, ploidy, strain, and temporal change.