Search results for " Knockout; Models"

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Mast Cells Infiltrating Inflamed or Transformed Gut Alternatively Sustain Mucosal Healing or Tumor Growth.

2015

Abstract Mast cells (MC) are immune cells located next to the intestinal epithelium with regulatory function in maintaining the homeostasis of the mucosal barrier. We have investigated MC activities in colon inflammation and cancer in mice either wild-type (WT) or MC-deficient (KitW-sh) reconstituted or not with bone marrow-derived MCs. Colitis was chemically induced with dextran sodium sulfate (DSS). Tumors were induced by administering azoxymethane (AOM) intraperitoneally before DSS. Following DSS withdrawal, KitW-sh mice showed reduced weight gain and impaired tissue repair compared with their WT littermates or KitW-sh mice reconstituted with bone marrow-derived MCs. MCs were localized i…

Cancer ResearchPathologyColorectal cancerCell CountAnimals; Animals Congenic; Azoxymethane; Carcinoma; Cell Count; Cell Transformation Neoplastic; Cells Cultured; Colitis; Colonic Neoplasms; Dextran Sulfate; Epithelial Cells; Humans; Inflammatory Bowel Diseases; Interleukin-33; Intestinal Mucosa; Mast Cells; Mice; Mice Inbred C57BL; Mice Knockout; Models Biological; Proto-Oncogene Proteins c-kit; Receptors Interleukin; Regeneration; Serine Endopeptidases; Species Specificity; Specific Pathogen-Free Organisms; Cancer Research; Oncology; Medicine (all)chemistry.chemical_compoundMiceAnimals CongenicMast CellMast CellsIntestinal MucosaCells CulturedMice KnockoutColonic NeoplasmMedicine (all)Dextran SulfateSerine EndopeptidasesColitisIntestinal epitheliumSpecific Pathogen-Free OrganismsSerine EndopeptidaseProto-Oncogene Proteins c-kitCell Transformation NeoplasticOncologyColonic Neoplasmsmedicine.symptomHumanmedicine.medical_specialtyAzoxymethaneInflammationModels BiologicalImmune systemSpecies SpecificitymedicineSpecific Pathogen-Free OrganismAnimalsHumansRegenerationColitisEpithelial CellAnimalAzoxymethanebusiness.industryInflammatory Bowel DiseaseCarcinomaEpithelial CellsReceptors Interleukinmedicine.diseaseInflammatory Bowel DiseasesInterleukin-33Interleukin-1 Receptor-Like 1 ProteinMice Inbred C57BLchemistrybusinessWound healingColitiHomeostasisCancer research
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The stable repression of mesenchymal program is required for hepatocyte identity: A novel role for hepatocyte nuclear factor 4α

2011

The concept that cellular terminal differentiation is stably maintained once development is complete has been questioned by numerous observations showing that differentiated epithelium may undergo an epithelial-to-mesenchymal transition (EMT) program. EMT and the reverse process, mesenchymal-to-epithelial transition (MET), are typical events of development, tissue repair, and tumor progression. In this study, we aimed to clarify the molecular mechanisms underlying these phenotypic conversions in hepatocytes. Hepatocyte nuclear factor 4α (HNF4α) was overexpressed in different hepatocyte cell lines and the resulting gene expression profile was determined by real-time quantitative polymerase…

Transcription FactorCellular differentiationMESH: Mice KnockoutMESH: HepatocytesMesodermMice0302 clinical medicineMESH: Liver NeoplasmsMESH: AnimalsHepatocyteHepatocyte Nuclear Factor 1-alphaMESH: Carcinoma HepatocellularRegulator geneHepatocyte differentiationMice KnockoutMESH: Mesoderm0303 health sciencesLiver NeoplasmsCell DifferentiationMESH: Transcription FactorsCell biologyHepatocyte nuclear factorsPhenotypeMESH: Models AnimalHepatocyte Nuclear Factor 4MESH: Epithelial CellsLiver Neoplasm030220 oncology & carcinogenesisModels AnimalMESH: Hepatocyte Nuclear Factor 4HumanMESH: Cell DifferentiationMESH: Cell Line TumorCarcinoma Hepatocellular[SDV.BC]Life Sciences [q-bio]/Cellular BiologyBiologyMESH: PhenotypeArticle03 medical and health scienceshepatocyte; mesenchymal program; SnailCell Line TumorAnimalsHumansMESH: Hepatocyte Nuclear Factor 1-alphaMESH: MiceTranscription factorAnimals; Carcinoma Hepatocellular; Cell Differentiation; Cell Line Tumor; Epithelial Cells; Hepatocyte Nuclear Factor 1-alpha; Hepatocyte Nuclear Factor 4; Hepatocytes; Humans; Liver Neoplasms; Mesoderm; Mice; Mice Knockout; Models Animal; Phenotype; Snail Family Transcription Factors; Transcription Factors; Hepatology030304 developmental biologyEpithelial CellMESH: HumansHepatologyAnimalMesenchymal stem cellEpithelial CellsSnail Family Transcription FactorMolecular biologyHepatocyte nuclear factor 4HepatocytesSnail Family Transcription FactorsChromatin immunoprecipitationTranscription Factors
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