With the growing interest in studying primary tissue samples by single cell transcriptome analysis, there is an emerging demand for a preservation strategy that enables sample transportation and storage. In this study, we describe a simple and general strategy that preserves primary tissues at hypothermic temperature. Using FACS and single-cell RNAseq, we demonstrated the effectiveness of this strategy in maintaining cell viability, cell population heterogeneity, and cell transcriptome integrity for primary tissues that underwent up to 3 days of preservation. Overall design: Examine the impact of hypothermic preservation on mouse kidney resident immune cells over up to 4 days at single-cell resolution
High fidelity hypothermic preservation of primary tissues in organ transplant preservative for single cell transcriptome analysis.
Cell line, Subject, Time
View Samples4 Treatment groups:
Dysregulation of gene expression in primary neuron models of Huntington's disease shows that polyglutamine-related effects on the striatal transcriptome may not be dependent on brain circuitry.
No sample metadata fields
View SamplesPrimary neuron model of Huntington's Disease. 2 treatment groups: A) Infected 4 weeks prior with TRE-Htt-N853-18Q-expressing recombinant lentivirus, B) Infected 4 weeks prior with TRE-Htt-N853-82Q-expressing recombinant lentivirus
Dysregulation of gene expression in primary neuron models of Huntington's disease shows that polyglutamine-related effects on the striatal transcriptome may not be dependent on brain circuitry.
No sample metadata fields
View SamplesCellular replicative senescence, a state of permanent cell-cycle arrest that occurs following an extended period of cell division in culture, has been linked to organismal aging, tissue repair and tumorigenesis. In this study, we comparatively investigated the global lipid profiles and mRNA content of proliferating and senescent-state BJ fibroblast cells. We found that both the expression levels of lipid-regulating genes, as well as the abundance of specific lipid families, are actively regulated. We further found that 19 polyunsaturated triacylglycerol species showed the most prominent changes during replicative senescence. We argue that diversion of polyunsaturated fatty acids to glycerolipid biosynthesis could be responsible for the accumulation of specific triacylglycerols. This, in turn, could be one of the cellular mechanisms to prevent lipotoxicity under increased oxidative stress conditions observed during replicative senescence. Collectively, our results place regulation of specific lipid species to a central role during replicative senescence. Overall design: We sequence total RNA from 3 early PD and 3 senesent human BJ cell lines to detect the expressional differences between early PD and senescent cells.
Regulation of lipids is central to replicative senescence.
Specimen part, Subject
View SamplesWe applied a 5''RNA-seq methodology to assess gene and differential isoform expression in striated muscle tissues extracted from adult wild-type mice. Overall design: 5''RNA-seq analysis of transcriptomes from mouse soleus, tibialis anterior (TA), diaphragm and left ventricle myocardial tissues. Three biological replicates per tissue were pooled into a single sequencing run. 5''RNA-seq methodology consists of enhanced sequencing of 5'' ends and computational assessment of changes at start-sites of genes.
Tropomodulin 1 directly controls thin filament length in both wild-type and tropomodulin 4-deficient skeletal muscle.
Sex, Specimen part, Cell line, Subject
View SamplesParthenogenetic embryonic stem cells (PESCs) may have future utility in cell replacement therapies. We examined genome-wide mRNA expression profiles of monkey PESCs relative to ESCs derived from fertilized embryos. Several known paternally-imprinted genes were in the highly down-regulated group in PESCs compared to ESCs. Allele specific expression analysis of paternally-imprinted genes, i.e., those genes whose expression is down-regulated in PESCs, led to the identification of one novel candidate that was exclusively expressed from a paternal allele. Our findings suggest that PESCs could be used as a model for studying genomic imprinting and in the discovery of novel imprinted genes.
Discovery of a novel imprinted gene by transcriptional analysis of parthenogenetic embryonic stem cells.
Sex, Specimen part
View SamplesDerivation of embryonic stem cells (ESC) genetically identical to a patient by somatic cell nuclear transfer (SCNT) holds the potential to cure or alleviate the symptoms of many degenerative diseases while circumventing any immunorejection issues. However, no primate nuclear transfer embryonic stem (ntES) cell lines have been derived to date. Here, we used a modified SCNT technique to produce rhesus macaque SCNT blastocysts at a relatively high efficiency from adult donor cells and we successfully derived two primate ntES cell lines from 304 oocytes (an overall efficiency of 0.7%). Nuclear and mitochondrial DNA analysis confirmed the ntES cell lines were derived from rhesus monkey SCNT blastocysts and both rhesus monkey ntES cell lines exhibited a normal ESC morphology, expressed key stemness markers, were transcriptionally indistinguishable from control ESC lines and differentiated into multiple cell types. This is, to our knowledge, the first confirmed derivation of primate ntES cell lines.
Producing primate embryonic stem cells by somatic cell nuclear transfer.
No sample metadata fields
View SamplesThe goal of this study is to uncover the changes in the transcriptome of sensory neurons of the liver kinase B1 (LKB1) knockout
Regulation of axonal morphogenesis by the mitochondrial protein Efhd1.
Specimen part
View SamplesThe respiratory system undergoes remarkable structural, biochemical, and functional changes necessary for adaptation to air breathing at birth. To identify dynamic changes in gene expression in the diverse pulmonary cells at birth, we performed Drop-seq based massive parallel single-cell RNA sequencing. An iterative cell type identification strategy was used to unbiasedly identify the heterogeneity of murine pulmonary cell types on postnatal day 1. Distinct populations of epithelial, endothelial, mesenchymal, and immune cells were identified, each containing distinct subpopulations. Cell type predictions and signature genes identified using Drop-seq were cross-validated using an independent single cell isolation platform. Temporal changes in RNA expression patterns were compared before and after birth to identify signaling pathways selectively activated in specific pulmonary cell types, demonstrating activation of UPR signaling during perinatal adaptation of the lung. Present data provide the first single cell view of the adaptation to air breathing after birth. All data from the present study are freely accessed at https://research.cchmc.org/pbge/lunggens/SCLAB.html. Overall design: Left and right lobes of PND1 mouse lungs were rapidly dissected in ice-cold PBS. Cell concentration was examined with a hemocytometer and adjusted to around 300 cells per microliter for Fluidigm C1.
Single cell RNA analysis identifies cellular heterogeneity and adaptive responses of the lung at birth.
Specimen part, Cell line, Subject
View SamplesMedulloblastoma is a malignant brain tumor that occurs predominantly in children. Current risk stratification based on the clinical parameters is inadequate for accurate prognostication. In order to get a better understanding of medulloblastoma biology, miRNA profiling of medulloblastomas was carried out in parallel with the expression profiling of protein- coding genes.
Distinctive microRNA signature of medulloblastomas associated with the WNT signaling pathway.
Sex
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