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GSE11987
Rattus norvegicus
6 Downloadable Samples
Affymetrix Rat Genome 230 2.0 Array (rat2302)
Description
SHH signaling pathway is activated in many type of cancers. However, the role of its activation in particular type of cancer was poorly understood. The GLI family transcription factor GLI1 is the effector of Shh pathway activation and functions as oncogene. Our goal of research is to identify the GLI1 targets in desmoplastic medulloblastomas.
Publication Title
Defining a role for Sonic hedgehog pathway activation in desmoplastic medulloblastoma by identifying GLI1 target genes.
Sample Metadata Fields
No sample metadata fields
View Samples- Mus musculus
- 17 Downloadable Samples
- Affymetrix Mouse Genome 430 2.0 Array (mouse4302)
Description
Loss of function mutations in the SCN9a gene encoding voltage-gated sodium channel Nav1.7 cause congenital insensitivity to pain (CIP) and anosmia in otherwise normal humans and mice, suggesting that this channel may be a good analgesic drug target. Surprisingly, potent selective antagonists of Nav1.7 are weak analgesics. We therefore investigated whether Nav1.7 , as well as contributing to electrical signalling may have an additional function. Here we report that Nav1.7 deletion has profound effects on the sensory neuron transcriptome, leading to dysregulation of a number of transcription factors as well as upregulation of enkephalin precursor PENK mRNA and down regulation of CEACAM10 mRNA, a protein involved in noxious thermosensation. PENK mRNA is transcriptionally upregulated in Nav1.7 null mutant female sensory neurons, resulting in increased enkephalin expression in the dorsal horn of the spinal cord. PENK expression is down-regulated by addition of the sodium ionophore monensin, suggesting that sodium may play a role as a second messenger. Application of the opioid antagonist naloxone strongly enhances noxious peripheral input into the spinal cord, and dramatically reduces analgesia in both male and female Nav1.7 null mutant mice, as well as in human Nav1.7 null mutants. These data show that loss of Nav1.7 expression increases opioid drive over the lifetime of mice and humans. They further suggest that Nav1.7 channel blockers alone may not replicate the phenotype of null mutant humans and mice, but should be potentiated with exogenous opioids.
Publication Title
Endogenous opioids contribute to insensitivity to pain in humans and mice lacking sodium channel Nav1.7.
Sample Metadata Fields
Specimen part
View Samples- Homo sapiens
- 12 Downloadable Samples
- Affymetrix Human Gene 1.0 ST Array (hugene10st)
Description
A major limitation in the cancer treatment is the ability of cancer cells to become resistant to chemotherapeutic drugs, by multidrug establishment. Here, we evaluate the possibility to utilize MC70, either as ABC transporters inhibitor or as anticancer agent, in monotherapy or in combination with doxorubicin for cancer treatment. The study was carried out in MCF7/ADR and Caco-2, breast and colon cancer cells, respectively. Cell growth and apoptosis were measured by MTT assay and DNA laddering Elisa kit, respectively. Cell cycle perturbation and cellular targets modulation were analyzed by flowcytometry and western blotting, respectively. MC70 was analyzed for its interaction with ABC transporters, MDR-1, BCRP and MRP-1, and for its anticancer activity. In MCF7/ADR, MC70 slight inhibited cell proliferation and strongly enhanced doxorubicin effectiveness; conversely in Caco-2, it inhibited cell growth without affecting doxorubicin efficacy. In addition, it induced apoptosis, canceled in favor of necrosis when it was given in combination with high doses of the anthracycline. Moreover, MC70 inhibited cell migration probably through its residual activity as sigma-1 ligand. Among the hypothesized molecular and cellular mechanisms responsible for all these effects, modulations of cell cycle, of pAkt and of the three MAPKs phosphorylation were evidenced while activity at transcription level was excluded. MC70 can be considered as a potential new anticancer agent with the capability to enhance doxorubicin effectiveness and an interesting role in the treatment of chemotherapy resistant tumors.
Publication Title
MC70 potentiates doxorubicin efficacy in colon and breast cancer in vitro treatment.
Sample Metadata Fields
Cell line, Treatment
View Samples- Homo sapiens
- 4 Downloadable Samples
IlluminaGenomeAnalyzerIIx
Description
Activating Transcription Factor 4 (ATF4) is a transcription factor induced by the integrated stress response (ISR). This experiment is a genome-wide profiling of ATF4-dependent RNA expression in human HAP-1 cells. HAP-1 is a near-haploid human cell line that was derived from KBM-7 cells isolated from a patient with Chronic Myelogenous Leukemia. We analyzed WT and ATF4 KO cells. We induced ATF4 expression by mimicking amino acid starvation with the drug histidinol. Overall design: RNA expression profiles were generated for WT and ATF4 KO HAP1 cells. ATF4 genes were mutated using Cas9 genome editing technology. Amino acid starvation was mimicked by treating WT and ATF4 KO cells with 2 mM histidinol for 24 hours, which increases ATF4 expression.
Publication Title
A forward genetic screen reveals novel independent regulators of ULBP1, an activating ligand for natural killer cells.
Sample Metadata Fields
No sample metadata fields
View Samples- Caenorhabditis elegans
- 27 Downloadable Samples
- Illumina Genome Analyzer II
Description
We have used a combination of three high-throughput RNA capture and sequencing methods to refine and augment the transcriptome map of a well studied genetic model, Caenorhabditis elegans. The three methods include a standard (non-directional) library preparation protocol relying on cDNA priming and foldback that has been used in several previous studies for transcriptome characterization in this species, and two directional protocols, one involving direct capture of single stranded RNA fragments and one involving circular-template PCR (circligase). We find that each RNA-seq approach shows specific limitations and biases, with the application of multiple methods providing a more complete map than was obtained from any single method. Of particular note in the analysis were substantial advantages of circligase-based and ssRNA-based capture for defining sequences and structures of the precise 5'' ends (which were lost using the double strand cDNA capture method). Of the three methods, ssRNA capture was most effective in defining sequences to the polyA junction. Using datasets from a spectrum of C. elegans strains and stages and the UCSC Genome Browser, we provide a series of tools, which facilitate rapid visualization and assignment of gene structures. Overall design: single-strand-capture, double-strand-capture, and circligase-based RNA-seq
Publication Title
Co-option of the piRNA pathway for germline-specific alternative splicing of C. elegans TOR.
Sample Metadata Fields
Sex, Specimen part, Cell line, Subject
View Samples- Mus musculus
- 134 Downloadable Samples
- NextSeq 500
Description
Cellular function is strongly dependent on surrounding cells and environmental factors. Current technologies are limited in characterizing the spatial location and unique gene-programs of cells in less structured and dynamic niches. Here we developed a method (NICHE-seq) that combines photoactivatable fluorescent reporters, two-photon microscopy and single-cell RNA-seq to infer the cellular and molecular composition of niches. We applied NICHE-seq to examine the high-order assembly of immune cell networks. NICHE-seq is highly reproducible in spatial tissue reconstruction, enabling identification of rare niche-specific immune subpopulations and unique gene-programs, including natural killer cells within infected B cell follicles and distinct myeloid states in the marginal zone. This study establishes NICHE-seq as a broadly applicable method for elucidating high-order spatial organization of cell types and their molecular pathways. Overall design: Transcriptional profiling of single cells from the specific immune niches in the lymph node and spleen, generated from deep sequencing of tens of thousands of cells, sequenced in several batches on illumina Nextseq500
Publication Title
Spatial reconstruction of immune niches by combining photoactivatable reporters and scRNA-seq.
Sample Metadata Fields
Specimen part, Cell line, Treatment, Subject
View Samples- Mus musculus
- 570 Downloadable Samples
- NextSeq 500
Description
We report the comparative gene expression between embryonic stem cell derived cranial and spinal motor neurons and multiple time points after induction and primary cultured ocular and spinal motor neurons, using single cell RNA sequencing. Overall design: Single neurons were isolated in 96-well plates and their gene expression profiled using SMART-Seq2 from 8 samples: (1-2) primary cultured oculomotor/trochlear motor neurons and spinal motor neurons collected at embryonic day E11.5 and cultured for 7 days, (3-8) ESC-derived induced cranial and spinal motor neurons at either 2 days, 5 days, or 7 days after plating.
Publication Title
Stem cell-derived cranial and spinal motor neurons reveal proteostatic differences between ALS resistant and sensitive motor neurons.
Sample Metadata Fields
Specimen part, Subject
View Samples- Mus musculus
- 35 Downloadable Samples
- Affymetrix Mouse Genome 430 2.0 Array (mouse4302)
Description
This experiment compares the transciptional changes in antigen specific murine CD8 T cells (P14 T cells) after exposure in vivo to dendritic cells (DC) pulsed with low dose cognate peptide (1uM KAVYNFATC), high dose cognate peptide (100uM KAVYNFATC) or no antigen. Splenic dendritic cells were freshly isolated, peptide pulsed, washed and then adoptively transferred s.c. to the right footpad of C57BL/6 hosts. After 18h, freshly isolated P14 CD8 T cells were labelled with CMFDA and adoptively transferred iv. Two hours after T cell transfer, anti-L selectin antibody was given iv. At 12 and 24 hours, recipients were sacrificed and The right popliteal LN was harvested at 12 or 24h post T cell transfer and a single cell suspension was created and stained with PE CD4, B220 and CD19 (dump channel). Cells were then sorted on a FacsARIA for being non-doublets, CMFDA positive and dump channel negative.
Publication Title
Antigen availability determines CD8⁺ T cell-dendritic cell interaction kinetics and memory fate decisions.
Sample Metadata Fields
No sample metadata fields
View Samples- Mus musculus
- 32 Downloadable Samples
- Illumina HiSeq 2000
Description
Natural killer T (NKT) cells identified by CD1d-tetramer and TCRb were isolated from the thymi of wild type and Ezh2 knockout mice. The NKT cells were FACS sorted into different stages based on the surface expression of CD44 and NK1.1. Overall design: For both wildtype and knockout mice, RNA was extracted from two biological replicates of CD44+ NK1.1- cells, one replicate of CD44+ NK1.1+ cells and one replicate of CD44- NK1.1- cells. Each RNA sample was divided into four and sequenced on four lanes of an Illumina HiSeq sequencer.
Publication Title
A non-canonical function of Ezh2 preserves immune homeostasis.
Sample Metadata Fields
Specimen part, Subject
View Samples- Homo sapiens
- 6 Downloadable Samples
- Illumina HiSeq 3000
Description
Dysfunctions in mitochondria dynamics and metabolism are common pathological processes associated with Parkinson's disease (PD). Recently, it was shown that an inherited form of PD and dementia is caused by new mutations in the OPA1 gene, which encodes for a key player of mitochondrial fusion and structure. iPSC-derived neural cells from these patients exhibited severe mitochondrial fragmentation, respiration impairment, ATP deficits and heightened oxidative stress. Reconstitution of normal levels of OPA1 in PD-derived neural cells normalized mitochondria morphology and function. OPA1 mutated neuronal cultures showed reduced survival in vitro. Intriguingly, selective inhibition of necroptosis effectively rescued this survival deficit. Additionally, dampening necroptosis in MPTP treated mice protected from DA neuronal cell loss. This human iPSC-based model captures both the early pathological events in OPA1 mutant neural cells and the beneficial effects of blocking necroptosis, highlighting this cell death process as a promising therapeutic target for PD. Overall design: 3 replicates for control and 3 replicates for OPA1 F38D mutant cells
Publication Title
Pharmacological Inhibition of Necroptosis Protects from Dopaminergic Neuronal Cell Death in Parkinson's Disease Models.
Sample Metadata Fields
Specimen part, Subject
View Samples