Childhood T-ALL samples were compared with thymocyte subsets
Deregulated WNT signaling in childhood T-cell acute lymphoblastic leukemia.
Specimen part
View SamplesWe have used microarrays to identify genes expressed and required for the second mitotic wave (SMW) during eye development. Eye discs expressing Spitz under the control of GMR Gal4 have no SMW as Spitz promotes G1 arrest, ectopic differentiation also occures. To control for the ectopic differentiation, Spi expressing eye antennal discs were compared to eye antennal discs expressing activated RasV12. In discs expresseding RasV12 under the control of GMRGal4 the SMW takes place normally prior to any ectopic differentiation.
Spitz from the retina regulates genes transcribed in the second mitotic wave, peripodial epithelium, glia and plasmatocytes of the Drosophila eye imaginal disc.
No sample metadata fields
View SamplesStudies have reported opposing effects of high-fat diet and mechanical stimulation on lineage commitment of the bone marrow stem cells. Yet, how the bone marrow modulates its gene expression in response to the combined effects of mechanical loading and a high-fat diet has not yet been addressed. We investigated whether early-life voluntary physical activity can modulate the effects of a high-fat diet on body composition, bone phenotype and bone marrow gene expression in male Sprague Dawley rats. We show that early-life high-fat diet positively affected body weight, total fat percentage and bone mass indices. In the bone marrow, early-life high-fat diet resulted in adipocyte hypertrophy and a pro-inflammatory and pro-adipogenic gene expression profile. Crucially, the bone marrow of the rats that undertook wheel exercise while on a high-fat diet retained a memory of the early-life exercise. This memory lasted at least 60 days after the cessation of the voluntary exercise and was manifest by: 1) the bone marrow adipocyte size of the exercised rats not exhibiting hypertrophy; and 2) genes associated with mature adipocyte function being down-regulated. Our results are consistent with the marrow adipose tissue having a unique and long-lasting response to high-fat feeding in the presence or absence of exercise. Overall design: Eighty male SD rats were randomised at weaning into : chow-fed group (C-SED) or a high-fat fed group. The high-fat fed group was further divided into three sub-groups: the high-fat sedentary (HF-SED) group, the high-fat late-exercise (HF-LEX) group, and the high-fat early-exercise (HF-EEX) group. At day 120-123, the animals were culled and total RNA was extracted from the bone marrow of the femur. The RNA was sequenced using Illumina Hiseq4000 technology. Differential gene expression analysis was carried out using Tuxedo suite of bioinformatic tools.
A Memory of Early Life Physical Activity Is Retained in Bone Marrow of Male Rats Fed a High-Fat Diet.
No sample metadata fields
View SamplesThe aim of this study was to employ a systems-level analysis to elucidate gene expression networks operating in the CD4 T-cell responses which underpin human atopic disease.
A network modeling approach to analysis of the Th2 memory responses underlying human atopic disease.
Time
View SamplesRenal excretion of water and major electrolytes exhibits a significant circadian rhythm. This functional periodicity is believed to result, at least in part, from circadian changes in secretion/reabsorption capacities of the distal nephron and collecting ducts. Here, we studied the molecular mechanisms underlying circadian rhythms in the distal nephron segments, i.e. distal convoluted tubule (DCT) and connecting tubule (CNT) and, the cortical collecting duct (CCD). Temporal expression analysis performed on microdissected mouse DCT/CNT or CCD revealed a marked circadian rhythmicity in the expression of a large number of genes crucially involved in various homeostatic functions of the kidney. This analysis also revealed that both DCT/CNT and CCD possess an intrinsic circadian timing system characterized by robust oscillations in the expression of circadian core clock genes (clock, bma11, npas2, per, cry, nr1d1) and clock-controlled Par bZip transcriptional factors dbp, hlf and tef. The clock knockout mice or mice devoid of dbp/hlf/tef (triple knockout) exhibit significant changes in renal expression of several key regulators of water or sodium balance (vasopressin V2 receptor, aquaporin-2, aquaporin-4, alphaENaC). Functionally, the loss of clock leads to a complex phenotype characterized by partial diabetes insipidus, dysregulation of sodium excretion rhythms and a significant decrease in blood pressure. Collectively, this study uncovers a major role of molecular clock in renal function.
Molecular clock is involved in predictive circadian adjustment of renal function.
Sex, Specimen part
View SamplesWe compared the gene expression profile from a group of children with T-cell acute lymphoblastic leukamia who remained in continuous complete remission (CCR) (n = 7) with that from a group who relapsed (n = 5), using Affymetrix HG-U133A arrays. Using the decision-tree based supervised learning algorithm Random Forest (RF), genes were ranked with respect to their ability to discriminate between patients who remained in CCR and those who relapsed. From the 300 top-ranked probe sets 9 genes were selected for further investigation and validation in an independent cohort of 25 T-ALL patients using quantitative real time polymerase chain reaction.
Identification of novel molecular prognostic markers for paediatric T-cell acute lymphoblastic leukaemia.
Sex, Age, Specimen part, Disease, Subject
View SamplesThis SuperSeries is composed of the SubSeries listed below.
Embryonic stem cell potency fluctuates with endogenous retrovirus activity.
Specimen part, Cell line, Treatment
View SamplesWe compared gene expression from 2C::tomato+/- ES cells from Kdm1a wt and mutant ES cultures
Embryonic stem cell potency fluctuates with endogenous retrovirus activity.
Cell line
View SamplesTo determine gene expression in 2 cell stage embryos Overall design: 3 Replicates of litters of wild type 2 cell stage embryos
Embryonic stem cell potency fluctuates with endogenous retrovirus activity.
Specimen part, Subject
View SamplesTo measure gene expression difference between wt and g9A knockout ES cells Overall design: G9A TT2 ES cells (Yokochi et al) were treated with Veh. Or 4OHT (to delete G9A)
Embryonic stem cell potency fluctuates with endogenous retrovirus activity.
Specimen part, Treatment, Subject
View Samples