Prophase I of male meiosis involves dynamic chromosome segregation processes during early spermatogenesis, including synapsis, meiotic recombination, and cohesion. Genetic defects in genes participating in these processes consistently cause reproduction failure in mice. To identify candidate genes responsible for infertility in humans, we performed expression profiling of mouse spermatogenic cells undergoing meiotic prophase I.
Screening of genes involved in chromosome segregation during meiosis I: toward the identification of genes responsible for infertility in humans.
Sex, Specimen part
View SamplesProphase I of meiosis involves dynamic chromosome segregation processes including synapsis, meiotic recombination, and cohesion. Genetic defects in genes participating in these processes consistently cause reproduction failure in mice. To identify candidate genes responsible for infertility or recurrent pregnancy loss in humans, we performed expression profiling of male and female gonads of mice undergoing meiotic prophase I.
Screening of genes involved in chromosome segregation during meiosis I: in vitro gene transfer to mouse fetal oocytes.
Sex, Age, Specimen part
View SamplesIntratracheal transfer of isolated lung fibroblasts in bleomycin-induced lung fibrosis recapitulates the activation process of lung fibroblasts after epithelial injury. In order to investigate gene expression signatures of transferred fibroblasts, we purified transferred fibroblasts 2, 4, and 7 days after the transfer and performed transcriptome analysis. We also isolated Acta2 high and low cells by using Acta2-mKO1 reporter mice 4 days after the transfer. Overall design: Lung fibroblasts were isolated from untreated Col-GFP mice after tissue dissociation and negative selection for lineage markers. Isolated lung fibroblasts were intratracheally transferred into wild type mice, which received intratracheal bleomycin treatment 7 days before the transfer. Col-GFP+ cells were purified from the host lungs by FACS sorting on 2, 4, and 7 days after the transfer. Acta2 high and low cells were prepared by transferring lung fibroblasts from Acta2-mKO1 reporter mice. mRNA was isolated from sorted cells, and gene expression profiles were acquired by next generation sequencing.
Gli signaling pathway modulates fibroblast activation and facilitates scar formation in pulmonary fibrosis.
Cell line, Subject
View SamplesTo test TWEAK/Fn14 pathway and relative agents in chronic TNBS colitis
TWEAK/Fn14 pathway promotes a T helper 2-type chronic colitis with fibrosis in mice.
Specimen part
View SamplesDecreased bile secretion in rodents by either ligation of the common bile duct or induction of cirrhosis causes changes in the small intestine, including bacterial overgrowth and translocation across the mucosal barrier. Oral administration of bile acids inhibits these effects. The genes regulated by FXR in ileum suggested that it might contribute to the enteroprotective actions of bile acids. To test this hypothesis, mice were administered either GW4064 or vehicle for 2 days and then subjected to bile duct ligation (BDL) or sham operation. After 5 days, during which GW4064 or vehicle treatment was continued, the mice were killed and their intestines were analyzed for FXR target gene expression.
Regulation of antibacterial defense in the small intestine by the nuclear bile acid receptor.
Sex, Treatment
View SamplesObstruction of bile flow results in bacterial proliferation and mucosal injury in the small intestine that can lead to the translocation of bacteria across the epithelial barrier and systemic infection. These adverse effects of biliary obstruction can be inhibited by administration of bile acids. Here we show that the farnesoid X receptor (FXR), a nuclear receptor for bile acids, induces genes involved in enteroprotection and inhibits bacterial overgrowth and mucosal injury in ileum caused by bile duct ligation. Mice lacking FXR have increased ileal levels of bacteria and a compromised epithelial barrier. These findings reveal a central role for FXR in protecting the distal small intestine from bacterial invasion and suggest that FXR agonists may prevent epithelial deterioration and bacterial translocation in patients with impaired bile flow. In this report we have examined the role of FXR in the ileum. We demonstrate that it plays a crucial role in preventing bacterial overgrowth and maintaining the integrity of the intestinal epithelium
Regulation of antibacterial defense in the small intestine by the nuclear bile acid receptor.
Sex, Compound
View SamplesA mouse AGM-derived cell line, AGM-s3, was shown to support the development of hematopoietic stem cells. To elucidate the molecular mechanisms regulating early hematopoiesis, we obtained subclones from AGM-s3, some of which were hematopoiesis supportive (s3-A9) and others which were non-supportive (s3-A7), and we analyzed the gene expression profiles by gene chip analysis.
Expression profile analysis of aorta-gonad-mesonephros region-derived stromal cells reveals genes that regulate hematopoiesis.
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View SamplesLung fibroblasts play a pivotal role in pulmonary fibrosis, a devastating lung diseases, by producing extracellular matrix. MicroRNAs (miRNAs) suppress a lot of genes posttranscriptionally, but the dynamics and the role of miRNAs in activated lung fibroblasts in fibrotic lung has been poorly understood. We found miR-19a, 19b and 20a subcluster expression increased in activated lung fibroblasts as the fibrosis progression. To elucidate whether fibroblast-specific intervention against miR-19a, 19b and 20a subcluster modulates pathogenic activation of lung fibroblasts in vivo, we intratracheally-transferred the subcluster-overexpressed fibroblasts into bleomycin-treated lungs and performed global transcriptome analysis. Overall design: miR-19a, 19b and 20a subcluster-overexpressed fibroblasts and mock-expressed fibroblasts were intratracheally-transferred to B6 mice at day 7 post-administration of 2 mg/kg of bleomycin. Donor cells were recoverred at day 3 post-transfer by cell sotring. Global transcriptome of transferred fibroblasts was generated by 3'SAGE-seq using Ion Proton sequencer.
Lung fibroblasts express a miR-19a-19b-20a sub-cluster to suppress TGF-β-associated fibroblast activation in murine pulmonary fibrosis.
Specimen part, Subject
View SamplesTGF-beta signaling in neural crest cells is required for normal craniofacial development. This signaling can be transduced via TGF-beta type I receptors (TGFbRI) using Smad-dependent or Smad independent signaling pathways.
TGF-β-activated kinase 1 (Tak1) mediates agonist-induced Smad activation and linker region phosphorylation in embryonic craniofacial neural crest-derived cells.
Specimen part, Treatment
View SamplesPulmonary fibrosis (PF) is an intractable disorder with a poor prognosis. Although lung fibroblasts play central roles in PF, their key regulatory molecules remain unclear. We performed transcriptome analysis of lung fibroblasts from bleomycin- and silica-treated murine lungs and identified 55 hub transcription factors highly connected to gene modules differentially expressed in PF. To elucidate whether fibroblast-specific intervention against the hub transcription factor Srebf1 modulates pathogenic activation of lung fibroblasts in vivo, we intratracheally-transferred active form of Srebf1-overexpressed fibroblasts into bleomycin-treated lungs and performed global transcriptome analysis. Overall design: Active form of Srebf1-overexpressed fibroblasts and mock-expressed fibroblasts were intratracheally-transferred to B6 mice at day 5 post-administration of 2 mg/kg of bleomycin. Expression of active form of Srebf1 was induced by doxycycline administration at day 7 post-administration of 2 mg/kg of bleomycin. Donor cells were recovered at day 10 post--administration of 2 mg/kg of bleomycin by cell sorting. Global transcriptome of transferred fibroblasts was generated by 3'SAGE-seq using Ion Proton sequencer.
Transcriptome network analysis identifies protective role of the LXR/SREBP-1c axis in murine pulmonary fibrosis.
Specimen part, Cell line, Subject
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