Identification of genes enriched in the presumptive primary mouth. Dissected tissues from the primary mouth anlage and two other anterior regions for comparison, the anterior dorsal and ventral plus cement gland.
The Wnt antagonists Frzb-1 and Crescent locally regulate basement membrane dissolution in the developing primary mouth.
No sample metadata fields
View SamplesThe transcription factors Mixer and Sox17beta have well characterized roles in endoderm specification during Xenopus embryogenesis. In order to more thoroughly understand the mechanisms by which these endodermal regulators act, we expressed Mixer and Sox17beta in nave ectodermal tissue and, using oligonucleotide-based microarrays, compared their genomic transcriptional profile to that of unaffected tissue. Using this novel approach, we identified 71 transcripts that are upregulated by Mixer or Sox17beta, 63 of which have previously uncharacterized roles in endoderm development. Furthermore, an in situ hybridization screen using antisense probes for several of these clones identified six targets of Mixer and/or Sox17beta that are expressed in the endoderm during gastrula stages, providing new and regional markers of the endoderm. Our results contribute further insight into the functions of Mixer and Sox17beta and bring us closer to understanding at the molecular level the pathways that regulate endoderm development.
Genomic profiling of mixer and Sox17beta targets during Xenopus endoderm development.
Sex, Specimen part
View SamplesThe irreversible decarboxylation step, which commits 2-oxo acids to the Ehrlich pathway, was initially attributed to pyruvate decarboxylase. However, the yeast genome was shown to harbour no fewer than 5 genes that show sequence similarity with thiamine-diphosphate dependent decarboxylase genes. Three of these (PDC1, PDC5 and PDC6) encode pyruvate decarboxylases { while ARO10 and THI3 represent alternative candidates for Ehrlich-pathway decarboxylases.
The Ehrlich pathway for fusel alcohol production: a century of research on Saccharomyces cerevisiae metabolism.
No sample metadata fields
View SamplesThree different recombinant forms of CyaA were used to investigate transcriptional responses of murine bone marrow-derived macrophages (BMDMs) using Affymetrix Mouse Genome Genechips. These forms were enzymically active, invasive CyaA, nonenzymically active, invasive CyaA (CyaA*) and non-enzymically active, non-invasive CyaA (proCyaA*). BMMs, treated with 20 ng/ml of CyaA for 24 h, showed over 1000 significant changes in gene transcription compared with control cells. CyaA caused an increase in transcription of many inflammatory genes and genes associated with various signalling cascades such as those involved in cyclic AMP-dependent protein kinase A signalling. Most strikingly, CyaA caused down-regulation of numerous genes involved in cell proliferation. CyaA* at 20 ng/ml significantly up-regulated the transcription of only twelve genes after 24 h whereas proCyaA* at this concentration significantly increased the transcription of only two genes.
Transcriptional responses of murine macrophages to the adenylate cyclase toxin of Bordetella pertussis.
Sex, Age, Specimen part, Treatment
View SamplesWhile acute aerobic and resistance exercise stimulate a number of shared genes, each exercsie mode stimlutes a number of uniquely responsive genes, thus highlighting that different forms of exercise facilitate distinct molecular responses in skeletal muscle. Overall design: Randomized, counter-balanced, cross-over design (n=6) in which subjects performed an acute bout aerobic and resistance exercise separated by ~1 week.
Transcriptome response of human skeletal muscle to divergent exercise stimuli.
Sex, Subject, Time
View SamplesRad21 is a subunit of cohesin. The main function of cohesin is to hold replicated chromosomes together until cells divide, but it also plays a role in gene expression. To find out which genes might be regulated by cohesin, a study was conducted to look for global changes in gene expression in zebrafish embryos lacking cohesin component Rad21.
Positive regulation of c-Myc by cohesin is direct, and evolutionarily conserved.
Specimen part, Time
View SamplesCellular senescence is an irreversible proliferative arrest and can be triggered in many cell types in response to diverse forms of cellular damage or stress.
Senescence of activated stellate cells limits liver fibrosis.
No sample metadata fields
View SamplesThis SuperSeries is composed of the SubSeries listed below.
Dissecting the unique role of the retinoblastoma tumor suppressor during cellular senescence.
Cell line
View SamplesThe action of RB as a tumor suppressor has been difficult to define, in part, due to the redundancy of the related proteins p107 and p130. By coupling advanced RNAi technology to suppress RB, p107 or p130 with a genome wide analysis of gene expression in growing, quiescent or ras-senescent cells, we identified a unique and specific activity of RB in repressing DNA replication as cells exit the cell cycle into senescence, a tumor suppressive program.
Dissecting the unique role of the retinoblastoma tumor suppressor during cellular senescence.
Cell line
View SamplesRight ventricular failure (RVF) due to pressure load is a major cause of death in congenital heart diseases and pulmonary hypertension. The mechanisms of RVF are yet unknown. Research is hampered by the lack of a good RVF model. Our aim was to study the pathophysiology of RVF in a rat model of chronic pressure load.
Clinical symptoms of right ventricular failure in experimental chronic pressure load are associated with progressive diastolic dysfunction.
Sex, Specimen part
View Samples