0000000000065238

AUTHOR

Norbert Suttorp

showing 5 related works from this author

Proteinaceous bacterial toxins and pathogenesis of sepsis syndrome and septic shock: the unknown connection

1994

Microbiology (medical)Microbial toxinsSeptic shockBacterial ToxinsImmunologySepsis syndromeGeneral MedicineBiologymedicine.diseasemedicine.disease_causeShock SepticIon ChannelsSystemic Inflammatory Response SyndromeMicrobiologyPathogenesisBacterial ProteinsStaphylococcus aureusShock (circulatory)ImmunologymedicineAnimalsHumansImmunology and Allergymedicine.symptomMedical Microbiology and Immunology
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Chronisch hypotone Kreislaufregulationsstörungen und akutes Kreislaufversagen (Schock)

2007

Der normale Blutdruck wird durch das Herzzeitvolumen einerseits und den peripheren Widerstand andererseits bestimmt. Voraussetzung fur ein ausreichendes Herzminutenvolumen ist — neben dem Gesamtblutvolumen — eine hinreichende kardiale Vorlast. Dem venosen Kapazitatssystem (das uber 80% des Gesamtblutvolumens enthalt) kommt eine entscheidende Bedeutung fur die Aufrechterhaltung des Blutdrucks bei Orthostase zu. Eine vom Sympathikus vermittelte rasche und effektive Kontraktion der grosen Hohlvenen garantiert beim Gesunden nach dem Aufrichten einen weiterhin guten Fullungszustand des rechten Herzens und damit ein ausreichendes Herzminutenvolumen.

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Rho protein inactivation induced apoptosis of cultured human endothelial cells.

2002

Small GTP-binding Rho GTPases regulate important signaling pathways in endothelial cells, but little is known about their role in endothelial cell apoptosis. Clostridial cytotoxins specifically inactivate GTPases by glucosylation [ Clostridium difficile toxin B-10463 (TcdB-10463), C. difficile toxin B-1470 (TcdB-1470)] or ADP ribosylation ( C. botulinum C3 toxin). Exposure of human umbilical cord vein endothelial cells (HUVEC) to TcdB-10463, which inhibits RhoA/Rac1/Cdc42, or to C3 toxin, which inhibits RhoA, -B, -C, resulted in apoptosis, whereas inactivation of Rac1/Cdc42 with TcdB-1470 was without effect, suggesting that Rho inhibition was responsible for endothelial apoptosis. Disruptio…

Pulmonary and Respiratory Medicinerac1 GTP-Binding Proteinrho GTP-Binding ProteinsProgrammed cell deathUmbilical VeinsEndotheliumPhysiologyBacterial ToxinsCASP8 and FADD-Like Apoptosis Regulating ProteinApoptosisBcl-2-associated X proteinBacterial ProteinsPhysiology (medical)Proto-Oncogene ProteinsmedicineCyclic AMPIn Situ Nick-End LabelingHumanscdc42 GTP-Binding ProteinCells Culturedbcl-2-Associated X ProteinAdenosine Diphosphate RibosebiologyCaspase 3Intracellular Signaling Peptides and ProteinsCell BiologyCaspase 9Cell biologyNeoplasm ProteinsEndothelial stem cellmedicine.anatomical_structureCdc42 GTP-Binding ProteinProto-Oncogene Proteins c-bcl-2Cell cultureApoptosisCaspasesbiology.proteinMyeloid Cell Leukemia Sequence 1 ProteinEndothelium VascularSignal transductionCarrier ProteinsrhoA GTP-Binding ProteinBH3 Interacting Domain Death Agonist ProteinSignal TransductionAmerican journal of physiology. Lung cellular and molecular physiology
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Rho protein inhibition blocks protein kinase C translocation and activation.

1998

Small GTP-binding proteins of the Ras and Rho family participate in various important signalling pathways. Large clostridial cytotoxins inactivate GTPases by UDP-glucosylation. Using Clostridium difficile toxin B-10463 (TcdB) for inactivation of Rho proteins (RhoA/Rac/Cdc42) and Clostridium sordellii lethal toxin-1522 (TcsL) for inactivation of Ras-proteins (Ras/Rac/Ral, Rap) the role of these GTPases in protein kinase C (PKC) stimulation was studied. Phorbol-myristate-acetate (PMA) induced a rapid PKC translocation to and activation in the particulate cell fraction as determined by PKC-activity measurements and Western blots for PKC alpha. These effects were blocked by TcdB inhibiting Rho …

LipopolysaccharidesRHOASwineBiophysicsClostridium difficile toxin ABronchiCell Cycle ProteinsGTPaseCDC42PKC alphaBiochemistryGTP-Binding ProteinsRHO protein GDP dissociation inhibitorAnimalsHumanscdc42 GTP-Binding ProteinMolecular BiologyProtein kinase CCells CulturedProtein Kinase CbiologyEpithelial CellsCell BiologyMolecular biologyCell biologyEnzyme ActivationCdc42 GTP-Binding Proteinbiology.proteinras ProteinsTetradecanoylphorbol AcetateEndothelium VascularrhoA GTP-Binding ProteinBiochemical and biophysical research communications
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Reduction of tumor necrosis factor-alpha (TNF-α) related nuclear factor-kappaB (NF-κB) translocation but not inhibitor kappa-B (Iκ-B)-degradation by …

2002

Degradation of inhibitor kappa-B (Ikappa-B) followed by translocation of nuclear factor-kappaB (NF-kappaB) into the nucleus and activation of gene expression is essential in tumor necrosis factor-alpha (TNF-alpha)-signaling. In order to analyze the role of Rho proteins in TNF-alpha-induced NF-kappaB-activation in human umbilical cord vein endothelial cells (HUVEC) we used Clostridium difficile toxin B-10463 (TcdB-10463) which inactivates RhoA/Rac1/Cdc42 by glucosylation and Clostridium botulinum C3-toxin which inhibits RhoA/B/C by ADP-ribosylation. Exposure of HUVEC to 10 ng/mL TcdB-10463 or 2.5 microg/mL C3-toxin inhibited TNF-alpha (100 ng/mL)-induced expression of a NF-kappaB-dependent r…

PharmacologyTRAF2RHOATumor Necrosis Factor-alphaNF-kappa BClostridium difficile toxin ABiological TransportRAC1Chromosomal translocationDNABiologyBiochemistryMolecular biologyRho kinase inhibitorbiology.proteinHumansI-kappa B ProteinsTumor necrosis factor alphaEndothelium VascularInterleukin 8rhoA GTP-Binding ProteinCells CulturedBiochemical Pharmacology
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