0000000000867459

AUTHOR

Rebecca Bohn

showing 3 related works from this author

Apoptotic-like Leishmania exploit the host´s autophagy machinery to reduce T-cell-mediated parasite elimination

2015

Apoptosis is a well-defined cellular process in which a cell dies, characterized by cell shrinkage and DNA fragmentation. In parasites like Leishmania, the process of apoptosis-like cell death has been described. Moreover upon infection, the apoptotic-like population is essential for disease development, in part by silencing host phagocytes. Nevertheless, the exact mechanism of how apoptosis in unicellular organisms may support infectivity remains unclear. Therefore we investigated the fate of apoptotic-like Leishmania parasites in human host macrophages. Our data showed—in contrast to viable parasites—that apoptotic-like parasites enter an LC3+, autophagy-like compartment. The compartment …

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Apoptotic-like Leishmania exploit the host´s autophagy machinery to reduce T-cell-mediated parasite elimination

2015

Apoptosis is a well-defined cellular process in which a cell dies, characterized by cell shrinkage and DNA fragmentation. In parasites like Leishmania, the process of apoptosis-like cell death has been described. Moreover upon infection, the apoptotic-like population is essential for disease development, in part by silencing host phagocytes. Nevertheless, the exact mechanism of how apoptosis in unicellular organisms may support infectivity remains unclear. Therefore we investigated the fate of apoptotic-like Leishmania parasites in human host macrophages. Our data showed--in contrast to viable parasites--that apoptotic-like parasites enter an LC3(+), autophagy-like compartment. The compartm…

log.ph logarithmic phaseT-LymphocytesApoptosisMACS magnetic-associated cell sortingMacrophageMFI mean fluorescence intensityLeishmaniasisMOI multiplicity of infectionanti-inflammatoryLeishmaniaeducation.field_of_studyPhagocytesCFSE carboxyfluorescein succinimidyl esterTGFB transforming growth factorAcquired immune systemapoptotic-like LeishmaniaPS phosphatidylserinehuman primary macrophagesCell biologyβ; TT tetanus toxoidCorrigendumProgrammed cell deathautophagyPopulationAntigen presentationANXA5 annexin VBasic Science Research PapersBiologyPhagocytosisCM complete mediumMAP1LC3/LC3 microtubule-associated protein 1 light chain 3AnimalsHumansMHC major histocompatibility complexIF immunofluorescenceeducationMolecular Biologyimmune evasionPBMCs peripheral blood mononuclear cellsT-cell proliferationIntracellular parasiteMacrophagesstat.ph stationary phaseAutophagyLm LeishmaniaCell BiologyLeishmaniabiology.organism_classificationIL interleukinLAP LC3-associated phagocytosisLAPhMDM human monocyte derived macrophageAutophagy
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AP-1 Transcription Factor Serves as a Molecular Switch between Chlamydia pneumoniae Replication and Persistence

2015

ABSTRACT Chlamydia pneumoniae is a Gram-negative bacterium that causes acute or chronic respiratory infections. As obligate intracellular pathogens, chlamydiae efficiently manipulate host cell processes to ensure their intracellular development. Here we focused on the interaction of chlamydiae with the host cell transcription factor activator protein 1 (AP-1) and its consequence on chlamydial development. During Chlamydia pneumoniae infection, the expression and activity of AP-1 family proteins c-Jun, c-Fos, and ATF-2 were regulated in a time- and dose-dependent manner. We observed that the c-Jun protein and its phosphorylation level significantly increased during C. pneumoniae development.…

Small interfering RNAGene knockdownCellular Microbiology: Pathogen-Host Cell Molecular InteractionsTranscription GeneticImmunologyChlamydiaeGene Expression Regulation BacterialHep G2 CellsChlamydophila pneumoniaeBiologybiology.organism_classificationMicrobiologyBacterial LoadMicrobiologyTranscription Factor AP-1AP-1 transcription factorInfectious DiseasesTranscription (biology)Host-Pathogen InteractionsHepatocytesHumansPhosphorylationParasitologyTranscription factorIntracellularInfection and Immunity
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