Reverse genetics has been widely used to investigate function of viral genes. In the present study we investigated the gene expression profile of a primary ovine cell (OFTu) in response to infection with the wild type (OV-IA82) and deletion mutant virus (OV-IA82024) aiming to determine possible functions for ORFV024 during ORFV infection.
A novel inhibitor of the NF-{kappa}B signaling pathway encoded by the parapoxvirus orf virus.
Specimen part
View SamplesWe present ScarTrace, a single-cell sequencing strategy that allows us to simultaneously quantify information on clonal history and cell type for thousands of single cells obtained from different organs from adult zebrafish. Using this approach we show that all blood cells types in the kidney marrow arise from a small set of multipotent embryonic. In contrast, we find that cells in the eyes, brain, and caudal tail fin arise from many embryonic progenitors, which are more restricted and produce specific cell types in the adult tissue. Next we use ScarTrace to explore when embryonic cells commit to forming either left or right organs using the eyes and brain as a model system. Lastly we monitor regeneration of the caudal tail fin and identify a subpopulation of resident macrophages that have a clonal origin that is distinct from other blood cell types. Overall design: Single cell sequencing data from cells isolated from zebrafish organs (whole kidney marrow, forebrain, hindbrain, left eye, right eye, left midbrain, right midbrain, and regenerated fin). For each cell, we provide libraries with transcritpome and with clonal information, respectively.
Whole-organism clone tracing using single-cell sequencing.
Specimen part, Subject
View SamplesBackground
A systems biology approach reveals common metastatic pathways in osteosarcoma.
Specimen part, Cell line
View SamplesMammary gland development is fueled by stem cell self-renewal and differentiation. External cues from the microenvironment coupled with internal cues such as post-transcriptional regulation exerted by miRNAs regulate stem cell behavior and stem cell fate. We have identified a miR205 regulatory network required for mammary gland morphogenesis and stem cell maintenance. In the postnatal mammary gland, miR205 is predominantly expressed in the basal/stem cell enriched population. Conditional deletion of miR205 in mammary epithelial cells severely impaired stem cell self-renewal and mammary repopulating potential both in vitro and in vivo. miR205 null glands displayed significant changes in the basal population, basement membrane and stroma. NKD1 and PP2A-B56, which inhibit the Wnt signaling pathway, and AMOT, which causes YAP cytoplasmic retention and inactivation were identified as miR205 downstream effectors. Collectively these findings reveal an essential role of miR205 in mammary gland development. Overall design: WT;RosamTmG/mTmG and miR-205fl/fl;RosamTmG/mTmG cells were treated with Ad-cre and transplanted back to 3-wk-old SCID-Beige mice. Mammary epithelial cell (MECs) were isolated from pooled 40 WT;RosamTmG/mTmG cre+ and miR-205fl/fl;RosamTmG/mTmG cre+ outgrowths after 8 weeks. GFP+ basal cells (CD24+CD49fhigh) were further sorted from MECs of each group and RNA-seq were performed on WT and miR205fl/fl cre+ green basal cells to look for differentially expressed genes.
miR-205 Regulates Basal Cell Identity and Stem Cell Regenerative Potential During Mammary Reconstitution.
Specimen part, Subject
View SamplesRecent studies have documented genome-wide binding patterns of transcriptional regulators and their associated epigenetic marks in hematopoietic cell lineages. In order to determine how epigenetic marks are established and maintained during developmental progression, we have generated long-term cultures of hematopoietic progenitors by enforcing the expression of the E-protein antagonist Id2. Hematopoietic progenitors that express Id2 are multipotent and readily differentiate upon withdrawal of Id2 expression into committed B lineage cells, thus indicating a causative role for E2A (Tcf3) in promoting the B cell fate. Genome-wide analyses revealed that a substantial fraction of lymphoid and myeloid enhancers are premarked by the poised or active enhancer mark H3K4me1 in multipotent progenitors. Thus, in hematopoietic progenitors, multilineage priming of enhancer elements precedes commitment to the lymphoid or myeloid cell lineages.
Multilineage priming of enhancer repertoires precedes commitment to the B and myeloid cell lineages in hematopoietic progenitors.
Specimen part
View SamplesExpansion for hematopoietic cells from umbilical cord blood is a strategy for use this cell source in clinic transplants, however, it is important to know about the genomic changes that can occur in expanded cells. In order to detect global expression profiles changes in hematopoietic stem and progenitors cells generated in vitro, we analyzed hematopoietics populations obtained by FACS in fresh from umbilical cord blood. HSC (fHSC) was defined as CD34+ CD38- CD71- CD45RA- Lin- and were cocultured with stromal cell line OP-9 plus FL, SCF, IL3, IL6, TPO, GMCSF and G-CSF by 7 days, after time we repurified HSC population by FACS using same immunophenotype (ivHSC). In other hand, fresh erythroid progenitors cells (fEPC) were identified as CD34+CD38+CD71+CD45RA- Lin- and fresh myeloid progenitors cells (fMPC) were identified as CD34+CD38+CD71-CD45RA+Lin-. In vitro progenitors cells (ivEPC and ivMPC) were obtained by culturing fHSC in Stemspan serum-free media plus SCF, TPO, IL6, FL and IL3 by 10 days, after time cells were repurified by FACS using same immunophenotype for fresh progenitors. In vitro generated cells were compared with their corresponding fresh population cells.
Functional Integrity and Gene Expression Profiles of Human Cord Blood-Derived Hematopoietic Stem and Progenitor Cells Generated In Vitro.
Specimen part
View SamplesRecent studies have documented genome-wide binding patterns of transcriptional regulators and their associated epigenetic marks in hematopoietic cell lineages. In order to determine how epigenetic marks are established and maintained during developmental progression, we have generated long-term cultures of hematopoietic progenitors by enforcing the expression of the E-protein antagonist Id2. Hematopoietic progenitors that express Id2 are multipotent and readily differentiate upon withdrawal of Id2 expression into committed B lineage cells, thus indicating a causative role for E2A in promoting the B cell fate. Genome-wide analyses revealed that a substantial fraction of lymphoid and myeloid enhancers are pre-marked by H3K4me1 in multipotent progenitors. However, H3K4me1 levels at a subset of enhancers are elevated during developmental progression, resulting in evolving enhancer repertoires that we propose orchestrate the myeloid and B cell fates.
Multilineage priming of enhancer repertoires precedes commitment to the B and myeloid cell lineages in hematopoietic progenitors.
Specimen part
View SamplesTrans fatty acids (tFAs) may have deleterious, long-term transcriptional effects. To explore that issue, we assessed the effects of the tFA elaidic acid and its cis isomer oleic acid on transcription and, in parallel, on DNA methylation.
The trans fatty acid elaidate affects the global DNA methylation profile of cultured cells and in vivo.
Cell line, Treatment
View SamplesWe generated and characterized an androgen-independent LNCaP-AI cell line by long-term culture of androgen-dependent LNCaP cells in RPMI-1640 medium containing charcoal-stripped serum. This approach used to generate the line mimics the castration resistant condition for treating prostate cancer, supporting the relevance of the LNCAP-AI cell line to Castration Resistant Prostate Cancer. Overall design: LNCaP-AI cells transfected with lncRNA PCAT1 shRNA and the scramble shRNA were used for the RNA-seq.
LncRNA PCAT1 activates AKT and NF-κB signaling in castration-resistant prostate cancer by regulating the PHLPP/FKBP51/IKKα complex.
Cell line, Subject
View SamplesWe sought to determine whether Ldh activity in SCC tumors is a marker of the cell type from which these cells arise, or a key metabolic activity important for tumor initiation or progression. Here we show that genetic abrogation of Ldh enzyme activity in HFSC-mediated tumorigenesis had no effect on tumor number, time to tumor formation, tumor proliferation, epithelial to mesenchymal transition in tumors, gene expression in tumors, tumor pathology, or the immune response to tumors. Overall design: Examination of mRNA profile of five LDHA knockout mice vs five wild type (WT) mice using Illumina HiSeq2500.
Increased lactate dehydrogenase activity is dispensable in squamous carcinoma cells of origin.
Specimen part, Subject
View Samples