Search results for "cell-to-cell communication"

showing 2 items of 2 documents

Agr system of Listeria monocytogenes EGD-e: role in adherence and differential expression pattern.

2007

ABSTRACT In this study, we investigated the agrBDCA operon in the pathogenic bacterium Listeria monocytogenes EGD-e. In-frame deletion of agrA and agrD resulted in an altered adherence and biofilm formation on abiotic surfaces, suggesting the involvement of the agr system of L. monocytogenes during the early stages of biofilm formation. Real-time PCR experiments indicated that the transcript levels of agrBDCA depended on the stage of biofilm development, since the levels were lower after the initial attachment period than during biofilm growth, whereas transcription during planktonic growth was not growth phase dependent. The mRNA quantification data also suggested that the agr system was a…

MESH : RNA MessengerTranscription GeneticOperon[ SDV.MP.BAC ] Life Sciences [q-bio]/Microbiology and Parasitology/Bacteriologymedicine.disease_causeMESH: Listeria monocytogenesApplied Microbiology and BiotechnologyBacterial AdhesionRapid amplification of cDNA endsTranscription (biology)MESH : Bacterial ProteinsMESH : DNA BacterialMESH: Bacterial Proteins0303 health sciencesMESH : Trans-ActivatorsMESH: Gene Expression Regulation BacterialEcologycell-to-cell communicationMESH : BiofilmsBiotechnologyMESH : Gene Expression Regulation BacterialDNA BacterialMESH : Bacterial AdhesionMESH: Trans-ActivatorsGenetics and Molecular BiologyMESH: BiofilmsBiologyagr systemMicrobiology03 medical and health sciencesListeria monocytogenesBacterial ProteinsmedicineMESH: Bacterial AdhesionRNA MessengerGene030304 developmental biologyMESH: RNA MessengerMessenger RNA030306 microbiologyMESH: Transcription GeneticBiofilmMESH : Transcription GeneticGene Expression Regulation Bacterialbiochemical phenomena metabolism and nutritionbiology.organism_classificationMolecular biologyMESH: DNA Bacterial[SDV.MP.BAC]Life Sciences [q-bio]/Microbiology and Parasitology/BacteriologyListeria monocytogenesBiofilmsbiofilm formationTrans-ActivatorsMESH : Listeria monocytogenesBacteriaFood ScienceApplied and environmental microbiology
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In vitro models of BBB: a tool for the analysis of cell to cell communication in the brain

2008

Many researchers have been trying to set in vitro models of the blood-brain barrier (BBB) aimed at analyzing, in simplified terms, the molecular mechanisms responsible for formation, maintenance and functioning of the BBB, as well as the capability of specific drugs and pro-drugs to cross BBB. We did it, starting with a simpler system of co-culture that allowed us to analyze the effects of neurons on differentiation of brain capillary endothelial cells (RBE4.B cells) in culture, and setting then a more complex model, that includes three cell types (endothelial cells, neurons and astrocytes). The reciprocal geometrical organization of brain cells in this model system is similar to the one ob…

extracellular membrane vesicleSettore BIO/10 - Biochimicacell-to-cell communicationin vitro models BBB
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