0000000000241513

AUTHOR

Mousumi Mahapatro

showing 3 related works from this author

Programming of Intestinal Epithelial Differentiation by IL-33 Derived from Pericryptal Fibroblasts in Response to Systemic Infection.

2016

SummaryThe intestinal epithelium constitutes an efficient barrier against the microbial flora. Here, we demonstrate an unexpected function of IL-33 as a regulator of epithelial barrier functions. Mice lacking IL-33 showed decreased Paneth cell numbers and lethal systemic infection in response to Salmonella typhimurium. IL-33 was produced upon microbial challenge by a distinct population of pericryptal fibroblasts neighboring the intestinal stem cell niche. IL-33 programmed the differentiation of epithelial progenitors toward secretory IEC including Paneth and goblet cells. Finally, IL-33 suppressed Notch signaling in epithelial cells and induced expression of transcription factors governing…

0301 basic medicineSalmonella typhimuriumCellular differentiationPopulationNotch signaling pathwayMice TransgenicBiologydigestive systemGeneral Biochemistry Genetics and Molecular Biology03 medical and health sciences0302 clinical medicineIntestine SmallmedicineAnimalsHumansCell LineageProgenitor cellIntestinal Mucosaeducationlcsh:QH301-705.5Cell Proliferationeducation.field_of_studySalmonella Infections AnimalReceptors NotchCell growthCell DifferentiationEpithelial CellsFibroblastsInterleukin-33Intestinal epitheliumInterleukin-1 Receptor-Like 1 ProteinCell biologyMice Inbred C57BL030104 developmental biologymedicine.anatomical_structurelcsh:Biology (General)Organ SpecificityImmunologyPaneth cellSignal transduction030215 immunologySignal TransductionCell reports
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Chronic intestinal inflammation in mice expressing viral Flip in epithelial cells

2018

Viruses are present in the intestinal microflora and are currently discussed as a potential causative mechanism for the development of inflammatory bowel disease. A number of viruses, such as Human Herpesvirus-8, express homologs to cellular FLIPs, which are major contributors for the regulation of epithelial cell death. In this study we analyzed the consequences of constitutive expression of HHV8-viral FLIP in intestinal epithelial cells (IECs) in mice. Surprisingly, expression of vFlip disrupts tissue homeostasis and induces severe intestinal inflammation. Moreover vFlip(IEC-tg) mice showed reduced Paneth cell numbers, associated with excessive necrotic cell death. On a molecular level vF…

0301 basic medicineNecrosisTransgeneImmunologyInflammationMice TransgenicBiologydigestive systemArticle03 medical and health sciencesMiceNecrosisViral ProteinsmedicineImmunology and AllergyAnimalsHomeostasisHumansTissue homeostasisCells CulturedRegulation of gene expressionMice KnockoutNF-kappa BHerpesviridae InfectionsInflammatory Bowel DiseasesEpitheliumCell biologyI-kappa B KinaseIntestines030104 developmental biologymedicine.anatomical_structureEnterocytesGene Expression RegulationFlipPaneth cellHerpesvirus 8 Humanmedicine.symptom
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Activation of Intestinal Epithelial Stat3 Orchestrates Tissue Defense during Gastrointestinal Infection

2015

Gastrointestinal infections with EHEC and EPEC are responsible for outbreaks of diarrheal diseases and represent a global health problem. Innate first-line-defense mechanisms such as production of mucus and antimicrobial peptides by intestinal epithelial cells are of utmost importance for host control of gastrointestinal infections. For the first time, we directly demonstrate a critical role for Stat3 activation in intestinal epithelial cells upon infection of mice with Citrobacter rodentium - a murine pathogen that mimics human infections with attaching and effacing Escherichia coli. C. rodentium induced transcription of IL-6 and IL-22 in gut samples of mice and was associated with activat…

STAT3 Transcription FactorColonAntimicrobial peptideslcsh:MedicineInflammation-digestive systemMicrobiologyMiceMedizinische FakultätmedicineCitrobacter rodentiumAnimalsHumansddc:610Intestinal Mucosalcsh:ScienceSTAT3PathogenMice KnockoutGastrointestinal tractMultidisciplinarybiologylcsh:REnterobacteriaceae InfectionsEpithelial CellsColitisMucusEpitheliumIntestinesMice Inbred C57BLmedicine.anatomical_structureImmunologybiology.proteinCitrobacter rodentiumlcsh:Qmedicine.symptomResearch ArticlePLoS ONE
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