0000000000336181

AUTHOR

K. Drumm

showing 3 related works from this author

Indoor air pollutants stimulate interleukin-8-specific mRNA expression and protein secretion of alveolar macrophages.

1998

Indoor air pollutants may cause inflammatory changes of the airways and adjacent pulmonary tissue. After phagocytosis of inhaled particles alveolar macrophages (AM) release chemotactic mediators capable of attracting inflammatory cells into the lung tissue. To evaluate these mechanisms further peripheral blood mononuclear cells (PBMNC) and human AM (freshly recovered from the lower respiratory tract) were exposed to the indoor particles Soot FR 101 and Printex 90, the asbestos fiber Chrysotile B, and titanium dioxide (TiO2) at concentrations of 10 or 50 microg/10(6) cells for up to 8 h. The migration of granulocytes into the conditioned supernatants of AM and PBMNC was quantified by chemota…

Pulmonary and Respiratory MedicineGranulocyte migrationAdultMaleChemokineBiologyGranulocytePeripheral blood mononuclear cellPolymerase Chain ReactionMicrobiologyMacrophages AlveolarmedicineHumansInterleukin 8RNA MessengerAgedAir PollutantsLungInterleukin-8InterleukinMolecular biologyChemotaxis Leukocytemedicine.anatomical_structureAir Pollution Indoorbiology.proteinLeukocytes MononuclearFemaleBronchoalveolar Lavage FluidChemotaxis assayLung
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Soot-exposed mononuclear cells increase inflammatory cytokine mRNA expression and protein secretion in cocultured bronchial epithelial cells.

2000

<i>Background:</i> Soot particles are air pollutants capable of inducing airway and lung parenchymal injury. Mononuclear and bronchial epithelial cells are central to the maintenance of homeostasis and inflammation in the airways. <i>Objectives:</i> The aim of this study was to evaluate the contribution of mononuclear cells to the release of inflammatory mediators by bronchial epithelial cells. <i>Methods:</i> To model the in vivo situation, an in vitro system of cocultured blood monocytes and BEAS-2B cells was established in a transwell system. Blood monocytes were exposed to soot particles (FR 101) at concentrations of up to 100 μg/10<sup>6</su…

Pulmonary and Respiratory MedicineAdultMaleInflammationBronchiEnzyme-Linked Immunosorbent AssayBiologycomplex mixturesPeripheral blood mononuclear cellSensitivity and SpecificityMonocytesAir pollutantsParenchymamedicineHumansRNA MessengerSoot particlesCells CulturedAir PollutantsLungInterleukin-6Reverse Transcriptase Polymerase Chain ReactionInterleukin-8Epithelial CellsBlood Proteinsrespiratory systemCarbonCoculture Techniquesrespiratory tract diseasesCell biologymedicine.anatomical_structureSecretory proteinCytokinesCytokine mrnaFemalemedicine.symptomInflammation MediatorsRespiration; international review of thoracic diseases
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Production of reactive oxygen intermediates by human macrophages exposed to soot particles and asbestos fibers and increase in NF-kappa B p50/p105 mR…

1999

Alveolar macrophages (AM) play a decisive role in the immunologic defense system of the lung and in inflammatory pulmonary pathomechanisms. AM and blood monocytes (BM) were exposed to chrysotile B, soot FR 101, and Printex 90 (P 90). We evaluated the reactive oxygen intermediate (ROI) release of AM and BM after particle exposure. ROI release was measured by chemiluminescence. Thirty-minute exposure caused a significant (up to 2.5-fold) increase in ROI release of AM (100 micrograms/10(6) cells) compared with control experiments (p0.01). Identical exposure conditions for BM resulted in a similar reaction pattern (maximum 2.2-fold increase in ROI release; p0.05). After a 90-min particle exposu…

Pulmonary and Respiratory MedicineAdultMaleP50Asbestos Serpentinemedicine.medical_treatmentMonocytesProinflammatory cytokineSuperoxide dismutaseGene expressionMacrophages AlveolarmedicineHumansRNA MessengerReceptorCells CulturedAgedLungbiologyDose-Response Relationship DrugChemistryReverse Transcriptase Polymerase Chain ReactionNF-kappa BMiddle AgedNFKB1Molecular biologyCarbonCytokinemedicine.anatomical_structureGene Expression RegulationImmunologyLuminescent Measurementsbiology.proteinFemaleReactive Oxygen SpeciesBronchoalveolar Lavage FluidLung
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