Regulatory T cells (Treg) are pivotal for the maintenance of peripheral tolerance by controlling self-reactive, chronic and homeostatic T cell responses. We now report that the increase in Treg suppressive function observed in lymphopenic mice correlates with the degree of lymphopenia and is caused by a higher frequency of a novel subpopulation of CD103posICOSpos cells among peripheral Treg that differentially express multiple Treg signature genes.
A subpopulation of CD103(pos) ICOS(pos) Treg cells occurs at high frequency in lymphopenic mice and represents a lymph node specific differentiation stage.
Sex, Age, Specimen part
View SamplesTo induce a differentiated phenotype, primary pancreatic TIC cultures were grown in 10% FBS containing conditions. To analyze gene expression changes upon induction of a differentiated phenotype, total RNA of cells cultured in FBS containing conditions and parallel control cells cultured under serum-free conditions was isolated and comparative gene expression profiling was performed.
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View SamplesMyocardial infarction (MI) is one of the most severe manifestations of coronary artery disease (CAD) and the leading cause of death from non-infectious diseases worldwide. It is known, that the central component of CAD pathogenesis is a chronic vascular inflammation. However, the mechanisms underlying the changes that occur in T, B and NK-lymphocytes, monocytes and other immune cells during CAD and MI are still poorly understood. One of those pathogenic mechanisms might be the dysregulation of intracellular signaling pathways in the immune cells.
Collapsing the list of myocardial infarction-related differentially expressed genes into a diagnostic signature.
Sex, Specimen part, Disease stage
View SamplesWe used microarrays to detail the global gene expression changes during aging in fly heads and identified genes related to the unfolded protein response are up-regulated upon aging.
EDEM Function in ERAD Protects against Chronic ER Proteinopathy and Age-Related Physiological Decline in Drosophila.
Age, Specimen part
View SamplesBone remodeling is characterized by the sequential, local tethering of osteoclasts and osteoblasts, and is key to the maintenance of bone integrity. While bone matrix-mobilized growth factors, such as TGF-, are proposed to regulate remodeling, no in vivo evidence exists that an osteoclast-produced molecule is the enigmatic coupling factor. We have identified Cthrc1, a protein secreted by mature bone-resorbing osteoclasts, that targets stromal cells so as to stimulate osteogenesis. The expression of Cthrc1 is robustly induced when mature osteoclasts are placed on dentin or hydroxyapatite, and also by increasing extracellular calcium. Cthrc1 expression in bone increases in a high turnover state, such as that which is induced by RANKL injections in vivo, whereas it decreases with aging or following alendronate treatment, conditions associated with suppressed bone turnover. The targeted deletion of the Cthrc1 gene eliminates Cthrc1 expression in bone, whereas its deficiency in osteoblasts does not exert any significant effect. Osteoclast-specific deletion of the Cthrc1 gene results in osteopenia due to reduced bone formation: it also impairs the coupling process following resorption induced by RANKL injections, with a resultant impairment of bone mass recovery. Thus, Cthrc1 is an osteoclast-secreted coupling factor that regulates bone remodeling and hence, skeletal integrity.
No associated publication
Specimen part
View SamplesThis SuperSeries is composed of the SubSeries listed below.
Identification of genes with a correlation between copy number and expression in gastric cancer.
Sex, Age, Specimen part, Disease, Disease stage
View SamplesWe performed the GeneChip analysis to identify multiple extracellular determinants such as cytokines, cell membrane-bound molecules, and matrix responsible for cardiomyogenic differentiation, and evaluated the statistical significance of differential gene expression by the NIA array analysis (http://lgsun.grc.nia.nih.gov/ANOVA/) (Bioinformatics 21: 2548), a web-based tool for microarrays data analysis.
Gremlin enhances the determined path to cardiomyogenesis.
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View SamplesTo elucidate gene expression associated with copy number changes, we performed a genome-wide copy number and expression microarray analysis of 25 pairs of gastric tissues.
Identification of genes with a correlation between copy number and expression in gastric cancer.
Sex, Age, Specimen part, Disease, Disease stage
View SamplesCdca7l acts as a male-specific oncogene in astrocytoma and glioblastoma, and can transform primary astrocyte growth in soft agar. We stably overexpressed Cdca7l in mouse primary astrocytes and compared gene expression to primary astrocytes expressing empty vector control in male and female cell to identify gene expression differences between male and female cells and between Cdca7l-overexpressing and normal primary astrocytes.
No associated publication
Sex, Specimen part
View SamplesCdca7l is expressed higher in male astrocytoma/GBM than female tumors or normal cells, and knockdown of Cdca7l blocks growth of male tumor cells, but not female tumor cells. We stably depleted Cdca7l in mouse astrocytoma cells and compared gene expression to control astrocytoma cells expressing non-targeting scrambled shRNA in male and female cells and to wild type primary astrocytes to identify gene expression differences between male and female cells and between Cdca7l-depleted, scrambled shRNA control cells and wild type primary astrocytes.
No associated publication
Sex
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