Remodeling of the actin cytoskeleton through actin dynamics (assembly and disassembly of filamentous actin) is known to be essential for numerous basic biological processes. In addition, recent in vitro studies provided evidence that actin dynamics participate in the control of gene expression. A spontaneous mouse mutant, corneal disease 1 (corn1), is deficient for a regulator of actin dynamics, destrin (DSTN; also known as actin depolymerizing factor or ADF), and develops epithelial hyperproliferation and neovascularization in the cornea. Dstncorn1 mice exhibit the actin dynamics defect in the corneal epithelial cells as evidenced by increased filamentous actin, offering an in vivo model to investigate the physiological significance of the transcriptional regulation by actin dynamics. To examine the effect of the Dstncorn1 mutation on gene expression, we performed a microarray analysis using the cornea from Dstncorn1 and wild-type control mice. A dramatic alteration of gene expression was observed in the Dstncorn1 cornea, with 1,226 annotated genes differentially expressed. Functional annotation of these genes revealed that most significantly enriched functional categories are associated with actin and/or cytoskeleton. Among genes that belong to these categories, a considerable number of serum response factor (SRF) target genes were found, indicating the existence of the actin-SRF pathway of transcriptional regulation in vivo. A comparative study using an allelic mutant strain, Dstncorn1-2J, with milder corneal phenotypes also suggested that the severity of the actin dynamics defect correlates with the level of gene expression changes. Our study provides evidence that actin dynamics have a strong impact on gene expression in vivo.
Effect of destrin mutations on the gene expression profile in vivo.
Sex, Age
View SamplesGenistein is one of the flabonoids which is included in high concentration in soy and has a high estrogenic activity. Beneficial effects of estrogen or hormone replacement therapy (HRT) on muscle mass or muscle atrophy have been demonstrated. We investigated the preventive effects and underlying mechanisms of genistein intake on denervation-induced muscle atrophy.
Dietary Genistein Prevents Denervation-Induced Muscle Atrophy in Male Rodents via Effects on Estrogen Receptor-α.
Sex, Age, Specimen part, Treatment
View SamplesAutoantibodies that arise in autoimmunity can be present years to decades prior to the onset of disease manifestations. This suggests that the initial autoimmune trigger involves a peripheral lymphoid component, which then drives disease pathology in local tissues later in life. To explore the impact of early peripheral immune dysregulation on the progression of Sjgrens Syndrome, we blocked the CD40-CD40L pathway in young female NOD.H-2h4 mice at 4 weeks of age with a single injection of anti-CD40L antibody, and collected total salivary gland at the age of week 8, 16 and 24. RNA was extracted and submitted to transcriptome profiling using Affymetrix microarray.
Autoimmune manifestations in aged mice arise from early-life immune dysregulation.
Treatment
View SamplesCancer cells have wide variety of gene expression profile. The objective of the study is to reveal the cancer-associated gene expression profile.
Gene expression signatures for identifying diffuse-type gastric cancer associated with epithelial-mesenchymal transition.
Specimen part
View SamplesAnalysis of human iPS-derived cardiomyocytes exposed to glucose, endothelin-1 and cortisol in vitro. Treatment produces a surrogate diabetic cardiomyopathic phenotype. Results provide insight into the pathways regulated by the treatment in the cardiomyocyte.
Disease modeling and phenotypic drug screening for diabetic cardiomyopathy using human induced pluripotent stem cells.
Specimen part, Treatment, Time
View SamplesFibroblasts are the principal stromal cells that exist in whole organs and play vital roles in many biological processes. Although the functional diversity of fibroblasts has been estimated, a comprehensive analysis of fibroblasts from the whole body has not been performed and their phenotypical diversity has not been sufficiently explored. The aim of this study was to elucidate the phenotypical diversity of human fibroblasts within the whole body.
Gastrointestinal Fibroblasts Have Specialized, Diverse Transcriptional Phenotypes: A Comprehensive Gene Expression Analysis of Human Fibroblasts.
Sex, Age, Specimen part
View SamplesFibroblasts isolated from human colon submucosal and subperitoneal layer were stimulated by colon cancer cell line (DLD-1) cultured medium. Peritoneal invasion in colon cancer is an important prognostic factor, and the fibrosis with -SMA was a significant pathological feature of the cancer microenvironment formed by peritoneal invasion (CMPI).
Human subperitoneal fibroblast and cancer cell interaction creates microenvironment that enhances tumor progression and metastasis.
Sex, Age, Specimen part
View SamplesConceptus implantation to the uterine endometrium is required for pregnancy establishment, during which non-invasive trophoblasts attach and adhere to the uterine endometrium or invasive trophoblasts invade into the uterine stroma, followed by placental formation in most mammalian species.
Down-regulation of transcription factor OVOL2 contributes to epithelial-mesenchymal transition in a noninvasive type of trophoblast implantation to the maternal endometrium.
Specimen part
View SamplesIn order to find the difference between human lung tissue-derived fibroblasts and human vascular adventitial fibroblasts for enhancing tumor formation ablity of human lung adenocarcinoma cell line A549, we found that human vascular adventitial fibroblasts enhance A549 tumor formation in vivo compared to human lung tissue-derived fibroblasts. To find the responsible genes for this phenomena, we used microarray analysis to find the expression difference between lung tissue-derived fibroblasts and vascular adventitial fibroblas
Podoplanin-positive fibroblasts enhance lung adenocarcinoma tumor formation: podoplanin in fibroblast functions for tumor progression.
Specimen part
View SamplesThis SuperSeries is composed of the SubSeries listed below.
Artificially induced epithelial-mesenchymal transition in surgical subjects: its implications in clinical and basic cancer research.
Specimen part, Disease, Disease stage, Subject
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