Polycystic ovarian syndrome (PCOS) is an endocrine disorder of the reproductive and metabolic axis in women during the reproductive age. In this study, we used a rat model exhibiting reproductive and metabolic abnormalities similar to human PCOS to unravel the molecular mechanisms underlining this complex syndrome.
Polycystic ovarian syndrome is accompanied by repression of gene signatures associated with biosynthesis and metabolism of steroids, cholesterol and lipids.
Specimen part
View SamplesAberrant placental gene expression associated with culture condition and/or deficiencies in transcriptome reprogramming are hypothesized to be the major cause of SCNT and IVP inefficiencies. Therefore, the main objective of this study was to invesitgate the dysregulated genes, molecular pathways and functional alteration in bovine placentas derived from SCNT and IVP pregnancies compared to their AI counterparts
Aberrant placenta gene expression pattern in bovine pregnancies established after transfer of cloned or in vitro produced embryos.
Specimen part, Treatment
View SamplesIn vivo microarray study of global gene expression changes in peripheral blood mononuclear cells (PBMCs) of Pietrain pigs during the stage of inatte immune and adaptive immune response to porcine reproductive and respiratory syndrome virus vaccination.
PBMC transcriptome profiles identifies potential candidate genes and functional networks controlling the innate and the adaptive immune response to PRRSV vaccine in Pietrain pig.
Sex
View SamplesThe study aimed to uncover differential expression pattern of regulatory microRNAs in bovine granulosa cells derived from preovulatory dominant and subordinate follicles. Overall design: We used ovarian follicle samples of experimental heifers slaughtered at day 19 of the estrous cycle . Follicles were catagorized as preovulatory dominant follicles (PDF) and anovulatory subordinate follicles (SF). The granulosa cells were collected from each follicle and subjected to microRNA enriched total RNA isolation and used for miRNAs deep sequencing. A total of 6 samples (three biological replicated from PDF and 3 biological replicates from SF) were used for miRNA deep sequencing.
MicroRNA Expression Profile in Bovine Granulosa Cells of Preovulatory Dominant and Subordinate Follicles during the Late Follicular Phase of the Estrous Cycle.
Subject
View SamplesThe histone variant H3.3 is incorporated in a replication-independent manner at heterochromatic regions by the ATRX-DAXX histone chaperone complex. Here, we present a high-resolution x-ray crystal structure of an interaction surface between ATRX and DAXX. We used single amino acid substitutions in DAXX that abrogate formation of the complex to explore ATRX-dependent and -independent functions of DAXX. We found that the repression of specific murine endogenous retroviruses is dependent on DAXX, but not on ATRX. In support, we reveal the existence of two biochemically distinct DAXX-containing complexes: The ATRX-DAXX complex involved in gene repression and telomere chromatin structure, and a DAXX-SETDB1-KAP1-HDAC1 complex that represses endogenous retroviruses independently of ATRX and H3.3 incorporation into chromatin. We found that histone H3.3 stabilizes DAXX protein levels and affects DAXX-regulated genes independently of its incorporation into nucleosomes. Our findings represent the first description of a nucleosome-independent function for the H3.3 histone variant. Overall design: RNA-seq analysis of five embryonic stem cell lines in duplicate (Daxx-/- mESC, Daxx-/- mESC rescued with Daxx WT, H3.3 KO mESC, H3.3 KO mESC rescued with H3.3 WT and H3.3 L126A-L130A mutant)
Structural and mechanistic insights into ATRX-dependent and -independent functions of the histone chaperone DAXX.
Specimen part, Cell line, Subject
View SamplesInducible co-stimulator (ICOS) interaction with its ligand (ICOSL) is involved in several T cell effector functions. While blockade of ICOS:ICOSL interaction in chronic graft versus host disease (GVHD) seems benefi cial, results for acute GVHD remain controversial. To further elucidate its role in acute GVHD, C57BL / 6 mice were lethally irradiated and reconstituted with allogeneic spleen cells in the absence or presence of ICOSL-blocking mAb. Mice reconstituted with allogeneic spleen cells experienced severe GVHD and died untreated within 6 9 days after transplantation. Mice treated with an anti-ICOSL mAb starting from day 3 after transplantation gained weight again and survived for at least additional 12 days, although the treatment was already stopped at day 11 after transplantation. In contrast, the anti-ICOSL treatment starting from day 0 did not prevent GVHD. The diff erence between therapeutic (day 3) and prophylactic (day 0) anti-ICOSL treatment was independent of CD25 + CD4 + regulatory T cells since their depletion did not abrogate the therapeutic eff ect of ICOSL blockade. Microarray analysis revealed IFN- and chemokine up-regulation in spleen cells of prophylactically treated mice, emphasizing kinetic dependence of acute GVHD modulation via blockade of ICOS:ICOSL interaction.
Only therapeutic ICOS:ICOSL blockade alleviates acute graft versus host disease.
Sex, Specimen part
View SamplesGEP on Affymetrix U133+2.0 microarrays was performed on ex vivo cell-sorted Tfh from FL or TONS
CD10 delineates a subset of human IL-4 producing follicular helper T cells involved in the survival of follicular lymphoma B cells.
Specimen part, Treatment
View SamplesWe report pregnacy-induced changes at the RNA level using RNAseq Overall design: Comparison of RNA transcript of islets isolated from 5 control and 5 pregnant animals at gestational day 14.5
Research Resource: A Dual Proteomic Approach Identifies Regulated Islet Proteins During β-Cell Mass Expansion In Vivo.
Specimen part, Cell line, Subject
View SamplesSafety sciences and the identification chemical hazard have been seen as one of the most immediate practical applications of human pluripotent stem cell technology. Protocols for the generation of many desirable human cell types have been developed, but optimization of neuronal models for toxicological use has been astonishingly slow, and the wide, clinically- important field of peripheral neurotoxicity is still largely unexplored. Here, a 2-step protocol to generate large lots of identical peripheral human neuronal precursors was characterized and adapted to the measurement of peripheral neurotoxicity. High content imaging allowed an unbiased assessment of cell morphology and viability. The computational quantification of neurite growth as functional parameter highly sensitive to disturbances by toxicants was used as endpoint reflecting specific neurotoxicity. The differentiation of cells towards dorsal root ganglia neurons was tracked in relation to a large background data set based on gene expression microarrays. On this basis, a peripheral neurotoxicity (PeriTox) test was developed as first toxicological assay that harnesses the potential of human pluripotent stem cells to generate cell types/tissues that are not otherwise available for prediction of human systemic organ toxicity. Testing of more than 30 chemicals showed that human neurotoxicants, as well as neurite growth enhancers, were correctly identified. Various classes of chemotherapeutics causing human peripheral neuropathies were identified, while they were missed when tested on human central neurons. The PeriTox-test established here shows the potential of human stem cells for clinically-relevant safety testing of drugs in use and of new emerging candidates.
Stem Cell-Derived Immature Human Dorsal Root Ganglia Neurons to Identify Peripheral Neurotoxicants.
Sex, Specimen part, Cell line
View Samples3 pairs of wt and ClC-6 knockout mice, RNA from p14 hippocampus
Lysosomal storage disease upon disruption of the neuronal chloride transport protein ClC-6.
Sex, Age, Specimen part, Subject, Time
View Samples