We are investigating the response of human lymphoblastoid cells to low-dose exposure of environmental metals
Comparative genomic analyses identify common molecular pathways modulated upon exposure to low doses of arsenic and cadmium.
Cell line, Treatment
View SamplesTranscriptome and translatome analyses of 6 and 24 hours imbibed seeds dormant and non-dormant seeds of NILDOG1-Cvi with and without addition of the transcription inhibitor Cordycepin. NILDOG1-Cvi is the Ler WT containing an introgression of the Cvi accession on chromosome 5, which includes the DOG1 gene (Bentsink et al., 2006).
Combined transcriptome and translatome analyses reveal a role for tryptophan-dependent auxin biosynthesis in the control of DOG1-dependent seed dormancy.
Specimen part, Treatment
View SamplesWe analysed the transcriptome of dormant and after-ripened imbibed seeds of different genotypes (Landsberg erecta and the different NILs) to identify dormancy and after-ripening genes that are absolutely required for these traits.
Differentially expressed genes during the imbibition of dormant and after-ripened seeds - a reverse genetics approach.
Specimen part
View SamplesMyelodysplastic syndromes (MDS) are a heterogeneous group of hematopoietic stem cell diseases characterized by dysplasia of one or more hematologic lineages and a high-risk of developing acute myeloid leukemia (AML). MDS patients have recurrent bacterial infections and abnormal expression of CD56 by monocytes. We investigated MDS patients’ bone marrow CD56+/CD56- monocytes and their in vitro derived dendritic cell (DCs) populations in comparison to cells obtained from disease-free subjects. We found that monocytes from MDS patients, irrespective of CD56 expression, have reduced phagocytosis activity and low expression of genes involved in triggering immune responses, regulation of immune and inflammatory response signaling pathways, and in the response to lipopolysaccharide. Dendritic cells (DCs) derived in vitro from MDS monocytes failed to develop dendritic projections and had reduced expression of HLA-DR and CD86 suggesting that antigen processing and T cell activation capabilities are impaired. In conclusion, we identified in both CD56+ and CD56- monocytes from MDS-patients several abnormalities that may be related to the increased susceptibility to infections observed in these patients.
Bone Marrow Monocytes and Derived Dendritic Cells from Myelodysplastic Patients Have Functional Abnormalities Associated with Defective Response to Bacterial Infection.
Specimen part, Disease
View SamplesPreeclampsia (PE) is a complex, heterogeneous disorder of pregnancy, demonstrating considerable variability in observed maternal symptoms and fetal outcomes. We hypothesized that this heterogeneity is due to the existence of multiple molecular forms of PE. To address our hypothesis, we created a large (N=330) human placental microarray data set consisting of seven previously published studies (GSE30186, GSE10588, GSE24129, GSE25906, GSE43942, GSE4707, and GSE44711) and 157 highly annotated samples from a BioBank (below).
Unsupervised Placental Gene Expression Profiling Identifies Clinically Relevant Subclasses of Human Preeclampsia.
Specimen part, Disease
View SamplesWe analyzed the transcriptome of dormant and after-ripened imbibed seeds of the Arabidopsis accession Cape verde Islands.
Dormant and after-Ripened Arabidopsis thaliana Seeds are Distinguished by Early Transcriptional Differences in the Imbibed State.
Specimen part, Time
View SamplesObjective: The etiology of PCOS is mostly unknown. Existing data support both genetic and environmental factors in its pathogenesis. Design: Prospective case - control study. Setting: University Hospital. Patients: 25 patients undergoing IVF-ICSI treatment. Intervention: Genome-wide oligonucleotide microarray technology was used to study differential gene-expression patterns of cultured human cumulus cells from IVF patients divided into 4 groups according to disease state (PCOS vs. Control) and BMI (Obese vs. Lean). Results: Two differential PCOS gene expression profiles were established: Lean-Type was formed by comparing PCOS lean (PL) vs. non-PCOS lean (NL) individuals; Obese-Type was formed by comparing PCOS obese (PO) vs. non-PCOS (NO) obese patients. Conclusions: Different molecular pathways are associated with PCOS in Lean and Obese individuals, as demonstrated by gene expression profiling of cumulus cells. Our findings provide insights into the molecular pathogenesis of PCOS.
Gene expression microarray profiles of cumulus cells in lean and overweight-obese polycystic ovary syndrome patients.
Sex
View SamplesFetal growth restriction (FGR) is a heterogeneous disorder of pregnancy associated with pathologically low fetal and neonatal weights. We hypothesized that FGR consists of multiple placental subtypes, similar to what we have observed in preeclampsia. To address this hypothesis, we assembled a fetal growth-focused human placental microarray data set (N=97) consisting of 20 new normotensive suspected FGR samples (below), in addition to term controls (N=26) and hypertensive suspected FGR samples (N=51) from GSE75010.
Placental transcriptional and histologic subtypes of normotensive fetal growth restriction are comparable to preeclampsia.
Specimen part
View SamplesTranscriptome analyses on seeds developed in different parental conditions
Effects of Parental Temperature and Nitrate on Seed Performance are Reflected by Partly Overlapping Genetic and Metabolic Pathways.
No sample metadata fields
View SamplesThe insulin-like growth factor-I (IGF-IR) and androgen (AR) receptors are important players in prostate cancer biology. Functional interactions between the IGF-I and androgen signaling pathways seem to have crucial roles in the progression of prostate cancer from early (benign) to advanced (metastatic) stages. DNA methylation is a major epigenetic alteration affecting gene expression. Hypermethylation of tumor suppressor promoters is a frequent event in human cancer, leading to inactivation and repression of specific genes. The aim of the present study was to identify the entire set of methylated genes (methylome) in a cellular model that replicates prostate cancer progression.
Global methylation analysis identifies PITX2 as an upstream regulator of the androgen receptor and IGF-I receptor genes in prostate cancer.
Cell line, Treatment, Time
View Samples