Identification of the relationships of Kaposi sarcoma (KS), normal skin to various cell cultures. The effects of KS herpes virus, the infectious cause of KS, on infected endothelial cells are also investigated.
ARID3B induces malignant transformation of mouse embryonic fibroblasts and is strongly associated with malignant neuroblastoma.
Sex, Specimen part, Disease, Disease stage, Cell line, Subject
View SamplesThe aim of this experiment was to get a comparison of the signatures between a non-transformed cell (NIH3T3 + vector) and a transformed cell (NIH3T3 + Fbxo7). NIH3T3 cells become transformed after the stable integration of the Fbxo7 gene. Fbxo7 potentiates cyclin D/cdk6 activity.
Transforming activity of Fbxo7 is mediated specifically through regulation of cyclin D/cdk6.
Cell line
View SamplesCompare the behaviour of two populations of non-hematopoetic stem cells (MSC and MAPC) isolated from human bone marrow. The effect of culture conditions on the behaviour of MSC was also characterised by isolating MSC and then culturing the cells for 96h in MAPC growth conditions
Validation of COL11A1/procollagen 11A1 expression in TGF-β1-activated immortalised human mesenchymal cells and in stromal cells of human colon adenocarcinoma.
Age, Specimen part
View SamplesThe most frequent genetic alterations in melanoma are gain-of-function mutations in BRAF, which result in addiction to the RAF-MEK-ERK signaling pathway. Despite success of RAF and MEK inhibitors in treating BRAFV600 mutant tumors, a major challenge is the inevitable emergence of drug resistance, which often involves reactivation of the MAPK pathway. Interestingly, resistant tumors are often sensitive to drug withdrawal, suggesting that hyperactivation of the MAPK pathway is not tolerated. To further characterize this phenomenon, we generated isogenic models of inducible MAPK hyperactivation in BRAFV600E melanoma cells by overexpression of ERK2. Using this model system, we demonstrated that supra-physiological levels of MAPK signaling led to cell death, which was reversed by MAPK inhibitors. Whereas MAPK pathway inhibition led to cell stasis in BRAFV600E melanoma cells, MAPK hyperactivation induced cytotoxicity. Furthermore, complete tumor regression was observed in an ERK2 overexpressing xenograft model. To identify mediators of MAPK hyperactivation- induced cell death, we conducted a large-scale pooled screen which showed that only shRNAs against BRAF and MAP2K1 rescued loss of cell viability. This suggested that no single downstream ERK2 effector was required, consistent with pleiotropic effects on multiple cellular stress pathways. Intriguingly, the detrimental effect of MAPK hyperactivation could be partially attributed to secreted factors, and more than 100 differentially secreted proteins were identified. The effect of ERK2 overexpression was highly context dependent, as RAS/RAF mutant but not RAS/RAF wildtype melanoma were sensitive to this perturbation. This vulnerability to MAPK hyperactivation raises the possibility of a novel therapeutic approach for RAS/RAF mutant cancers.
No associated publication
Sex, Specimen part, Disease, Cell line, Treatment
View SamplesWe established gene expression profiles of diagnostic bone marrow samples of monozygotic twins with acute lymphoblastic leukemia. We established technical duplicates for each twin.
Prenatal origin of separate evolution of leukemia in identical twins.
Sex, Specimen part, Disease, Disease stage
View SamplesType-1 interferons are critical for inhibiting HIV and simian immunodeficiency virus. However, it is largely unknown which of the hundreds of interferon-stimulated genes (ISGs) restrict HIV replication (with the notable exceptions of APOBEC3G, MX2, and BST-2). To identify HIV restriction factors, we sequenced activated CD4+ T cell RNA from 19 humans with untreated HIV infection before and after peginterferon alpha 2b (IFN) injection. Antiretroviral therapy (ART) durably suppresses HIV-1, prevents progression to acquired immunodeficiency syndrome, and reduces mortality. However, even with ART HIV-1 infected adults remain at higher risk of death from inflammatory disease. To understand the role of ART in altering cell-associated HIV RNA and host RNA changes within activated CD4 T cells we also sequenced activated CD4 T cell RNA from these same 19 humans after initiating ART and obtaining =12 weeks of undetectable viremia.
No associated publication
No sample metadata fields
View SamplesTo investigate the effect of local genetic variation on heritable traits, we developed a new recombinant inbred line (RIL) population derived from four wild isolates. The wild isolates were collected from two closely located sites in France: Orsay and Santeuil. By crossing these four genetically diverse parental isolates a population of 200 RILs was constructed. RNA-seq was used to obtain sequence polymorphisms
No associated publication
Sex, Specimen part, Cell line
View SamplesNo description.
No associated publication
Age, Specimen part
View SamplesNo description.
No associated publication
Sex, Age, Specimen part, Disease
View SamplesIn mice, zygotic activation mainly occurs on a wide variety of genes mainly at the 2-cell stage. Long noncoding RNAs (lncRNAs) are increasingly being recognized as molecules that modulate gene expression. In this study, we performed the directional RNA-seq of MII oocytes and 2-cell embryos to identify the long noncoding RNAs activated during ZGA.
No associated publication
No sample metadata fields
View Samples