BALB/c mice are susceptible to proteoglycan (PG) aggrecan-induced arthritis (PGIA), and the absence of TSG-6 further increases susceptibility and local inflammatory reactions, including neutrophil invasion into the joints. To gain insight into the mechanisms of TSG-6 action, synovial fibroblasts were isolated from wild-type and TSG-6-KO mice, cultured and exposed to various agents affecting either the TSG-6 expression and/or modify the intracellular function of TSG-6.
TSG-6 protein, a negative regulator of inflammatory arthritis, forms a ternary complex with murine mast cell tryptases and heparin.
Sex, Treatment
View SamplesBALB/c mice are susceptible to proteoglycan (PG) aggrecan-induced arthritis (PGIA), a murine model of rheumatoid arthritis (Glant,T.T. and Mikecz,K., Proteoglycan aggrecan-induced arthritis. A murine autoimmune model of rheumatoid arthritis. Methods Mol.Med. 2004. 102: 313-338.). However, there are marked differences among BALB/c colonies (maintained by different vendors at different locations) in PGIA onset and severity, which could be the result of subtle variations in their genetic background.
BALB/c mice genetically susceptible to proteoglycan-induced arthritis and spondylitis show colony-dependent differences in disease penetrance.
Sex
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STAT6 transcription factor is a facilitator of the nuclear receptor PPARγ-regulated gene expression in macrophages and dendritic cells.
Specimen part, Treatment, Subject, Time
View SamplesC57Bl/6 wild-type and STAT6 KO mice were used to study PPARg and IL-4 signaling. Bone marrow of 3 mice per group was isolated and differentiated to macrophages with M-CSF (20 ng/ml). 20 ng/ml IL-4 was used to induce alternative macrophage activation and 1 uM Rosiglitazone (RSG) was used to activate PPARg. From each mouse 4 samples were generated: 1. M-CSF, 2. M-CSF+RSG, 3. IL-4 and 4. IL-4+RSG. All compounds were added throughout the whole differentiation process, and frech media was added every other day. Control cells were treated with vehicle (DMSO:ethanol). After 10 days, RNA was isolated and gene expression profiles were analyzed using Mouse Genome 430 2.0 microarrays from Affymetrix.
STAT6 transcription factor is a facilitator of the nuclear receptor PPARγ-regulated gene expression in macrophages and dendritic cells.
Specimen part, Treatment, Time
View SamplesTAZ-deficient mice have the abnormalities in the lung development. We expect the comparison of the gene expression profiles of TAZ-deficient and wild-type lungs would reveal the underlying mechanisms.
Transcriptional coactivator with PDZ-binding motif is essential for normal alveolarization in mice.
No sample metadata fields
View SamplesGene expression in self-renewing epithelial tissues is controlled by cis- and trans-activating regulatory factors that mediate responses to exogenous agents capable of causing tissue damage, infection, inflammation, or tumorigenesis. We used network construction methods to analyze the genetic architecture of gene expression in normal mouse skin in a cross between tumor-susceptible Mus musculus and tumor-resistant Mus spretus. We demonstrate that gene expression motifs representing different constituent cell types within the skin such as hair follicle cells, haematopoietic cells, and melanocytes are under separate genetic control. Motifs associated with inflammation, epidermal barrier function and proliferation are differentially regulated in mice susceptible or resistant to tumor development. The intestinal stem cell marker Lgr5 is identified as a candidate master regulator of hair follicle gene expression, and the Vitamin D receptor (Vdr) links epidermal barrier function, inflammation, and tumor susceptibility.
Genetic architecture of mouse skin inflammation and tumour susceptibility.
No sample metadata fields
View SamplesThe objective of this study was to understand the genetic mechanisms of Vitamin-A-Deficiency (VAD)-induced arrest of spermatogonial stem-cell differentiation. Vitamin A and its derivatives (the retinoids) participate in many physiological processes including vision, cellular differentiation and reproduction. VAD affects spermatogenesis, the subject of our present study. Spermatogenesis is a highly regulated process of differentiation and complex morphologic alterations that, in the postnatal testis, leads to the formation of sperm in the seminiferous epithelium. VAD causes early cessation of spermatogenesis, characterized by degeneration of meiotic germ cells, leading to seminiferous tubules containing mostly type A spermatogonia and Sertoli cells. In this study, we investigated the molecular basis of VAD on spermatogenesis in mice. We used adult Balb/C mice fed with a Control or VAD diet for an extended period of time (8-28 weeks) and selected two time points (18 and 25 weeks) for microarray analysis.
Long-term vitamin A deficiency induces alteration of adult mouse spermatogenesis and spermatogonial differentiation: direct effect on spermatogonial gene expression and indirect effects via somatic cells.
Specimen part, Treatment
View SamplesExpression profile of liver of ICR mice (13-week old) treated with control diet (CRF-1) or CRF-1 containing 500 ppm diosgenin for 4 weeks.
Chemoprevention of azoxymethane/dextran sodium sulfate-induced mouse colon carcinogenesis by freeze-dried yam sanyaku and its constituent diosgenin.
Specimen part, Treatment
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DNA methylation profiling of embryonic stem cell differentiation into the three germ layers.
Sex, Specimen part
View SamplesPhosphorylation and subsequent nuclear translocation of SMAD proteins determine the cellular response to activin. Here we identify a novel means by which activin signalling is regulated to enable developmental stage-specific SMAD gene transcription. In response to activin A, immature proliferating mouse Sertoli cells exhibit nuclear accumulation of SMAD3, but not SMAD2, although both proteins are phosphorylated. In post-mitotic differentiating cells, both SMAD2 and SMAD3 accumulate in the nucleus. Furthermore, immature Sertoli cells are sensitive to activin dosage; at higher concentrations maximal SMAD3 nuclear accumulation is observed, accompanied by a small, but significant, increase in nuclear SMAD2. Microarray analysis confirmed that differential SMAD utilization correlated with altered transcriptional outcomes and identified new activin target genes, Gja1 and Serpina5, which are known to be required for Sertoli cell development and male fertility. In immature Sertoli cells, genetic or transient knockdown of SMAD3 enhanced SMAD2 nuclear accumulation in response to activin, with increased Serpina5 mRNA levels associated with nuclear localized SMAD2. In transgenic mice with altered activin bioactivity that display male fertility phenotypes, testicular Gja1 and Serpina5 mRNA levels reflected altered in vivo activin levels. We conclude that regulated nuclear accumulation of phosphorylated SMAD2 is a novel determinant of developmentally regulated activin signalling.
Developmentally regulated SMAD2 and SMAD3 utilization directs activin signaling outcomes.
No sample metadata fields
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