We used full genome microarrays to profile the full lifetime of the mouse placenta from embryonic day 8.5 (e8.5), at the time of chorioallantoic fusion, until postnatal day 0 (P0).
Genomic evolution of the placenta using co-option and duplication and divergence.
Specimen part
View SamplesWe used full genome microarrays to profile the full lifetime of the mouse placenta from embryonic day 8.5 (e8.5), at the time of chorioallantoic fusion, until postnatal day 0 (P0). For these samples, at each stage the fetal placenta and maternal decidual tissues were dissected and profiled separately (See series 1).
Genomic evolution of the placenta using co-option and duplication and divergence.
Specimen part
View SamplesGonadotrope or null cell pituitary tumors present clinically with signs of hypogonadism and hypopituitarism, together with visual disturbances due to mass effects. Since there are no medical therapies, surgery and/or radiation are the only therapeutic options. To identify dysregulated genes and/or pathways that may play a role in tumorigenesis and/ or progression, molecular profiling was performed on 14 gonadotrope tumors and 9 normal human pituitaries from autopsy samples. Principle component analysis (PCA) revealed clear discrimination between tumor and normal pituitary gene expression profiles. Bioinformatic analysis identified specific genes and pathways that were highly differentially regulated, including a cohort of putative downstream effectors of p53 were repressed in gonadotrope pituitary tumors, including GADD45, GADD45 and Reprimo with concomitant downregulation of the upstream regulator, PLAGL1. PLAGL1 reexpression in gonadotrope cells did not directly modulate the downstream targets. Further functional analysis of GADD45 was performed. Overexpression of GADD45 in mouse gonadotrope cells blocked proliferation, increased rates of apoptosis in response to growth factor withdrawal and increased colony formation in soft agar. In contrast to prior studies with GADD45, methylation interference assays showed no evidence of epigenetic modification of the GADD45 promoter in pituitary tumors. Thus, our data suggest that many components downstream of p53 are suppressed in gonadotrope pituitary tumors. A novel candidate, GADD45 is low in tumors and reexpression blocks proliferation, survival and tumorigenesis in gonadotrope cells. Unlike GADD45, GADD45 is not methylated to block its expression. Together these studies identify new targets and mechanisms to explore concerning pituitary tumor initiation and progression.
Identification of growth arrest and DNA-damage-inducible gene beta (GADD45beta) as a novel tumor suppressor in pituitary gonadotrope tumors.
Sex
View SamplesPurpose: To investigate the quaternary structures of Rhodopsin-family GPCRs. Method: Analyzed 60 receptors from HEK 293T cells. Results: 1) Most of these receptors are monomers. 2) The phylogenetic distribution of dimers suggests that monomers have an evolutionary advantage due to constraints imposed by dimerization on rates of receptor diversification. Overall design: To investigate the quaternary structures of 60 Rhodopsin-family GPCRs expressed in HEK 293T cells using type-1 and -3 BRET assays.
Receptor Quaternary Organization Explains G Protein-Coupled Receptor Family Structure.
Specimen part, Subject
View SamplesSarcoidosis, a systemic granulomatous syndrome invariably affecting the lung, typically spontaneously remits but in ~20% of cases progresses with severe lung dysfunction or cardiac and neurologic involvement (complicated sarcoidosis). Unfortunately, current biomarkers fail to distinguish patients with remitting (uncomplicated) sarcoidosis from other fibrotic lung disorders, and fail to identify individuals at risk for complicated sarcoidosis.
Peripheral blood gene expression as a novel genomic biomarker in complicated sarcoidosis.
Specimen part, Disease, Race
View SamplesWe have used microarrays to identify individual genes and pathways regulated by Gq/11 or G12/13 signalling in type II alveolar epithelial cells isolated from the lungs of knockout mice.
Loss of epithelial Gq and G11 signaling inhibits TGFβ production but promotes IL-33-mediated macrophage polarization and emphysema.
Specimen part
View SamplesWe hypothesized that tissue genome-wide gene expression analysis, coupled with gene network analyses of differentially expressed genes, would provide novel insights into the pathogenesis of pulmonary sarcoidosis.
Gene expression profiling identifies MMP-12 and ADAMDEC1 as potential pathogenic mediators of pulmonary sarcoidosis.
Specimen part, Disease, Disease stage
View SamplesThis series analyses germinating Lepidium sativum seeds with both temporal and spatial detail. This is a cross species microarray normalisation on Arabidopsis thaliana chips. Performed as part of the vSEED project
Promotion of testa rupture during garden cress germination involves seed compartment-specific expression and activity of pectin methylesterases.
Specimen part
View SamplesDCA (3,5-Dichloroanthranilic acid) is a newly identified synthetic defense elicitor. To perform a comparative analysis of defense responses triggered by DCA and the structurally related defense inducer INA (2,6-Dichloroisonicotinic acid) Affymetrix chip experiments were performed with Arabidopsis thaliana seedlings treated with one of these two compounds.
The synthetic elicitor 3,5-dichloroanthranilic acid induces NPR1-dependent and NPR1-independent mechanisms of disease resistance in Arabidopsis.
No sample metadata fields
View SamplesWe characterzised global changes in gene expresseion between 8 cell embryos and blastocysts to identify potential genes required for blastocyst formation.
Transcription factor AP-2γ is a core regulator of tight junction biogenesis and cavity formation during mouse early embryogenesis.
Specimen part
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