2019
Severe Leptospirosis Features in the Spleen Indicate Cellular Immunosuppression Similar to That Found in Septic Shock
Duarte-Neto A, Croda J, Pagliari C, Soriano F, Nicodemo A, Duarte M. Severe Leptospirosis Features in the Spleen Indicate Cellular Immunosuppression Similar to That Found in Septic Shock. Frontiers In Immunology 2019, 10: 920. PMID: 31114579, PMCID: PMC6503108, DOI: 10.3389/fimmu.2019.00920.Peer-Reviewed Original ResearchConceptsSeptic shockLeptospirosis patientsSevere leptospirosisPulmonary hemorrhagePositive cellsRed pulpBacterial septic shockSeptic shock patientsCaspase-3-positive cellsImmune cell markersSpleen of patientsActive caspase-3 positive cellsSemi-quantitative scoreImmunomodulatory treatmentShock patientsCellular immunosuppressionIL-10Immunologic featuresImmunosuppressive stateMarked atrophyEndothelial activationControl spleensHistological featuresIntense infiltrationPlasma cells
2011
Heterologous expression of pathogen-specific genes ligA and ligB in the saprophyte Leptospira biflexaconfers enhanced adhesion to cultured cells and fibronectin
Figueira CP, Croda J, Choy HA, Haake DA, Reis MG, Ko AI, Picardeau M. Heterologous expression of pathogen-specific genes ligA and ligB in the saprophyte Leptospira biflexaconfers enhanced adhesion to cultured cells and fibronectin. BMC Microbiology 2011, 11: 129. PMID: 21658265, PMCID: PMC3133549, DOI: 10.1186/1471-2180-11-129.Peer-Reviewed Original ResearchConceptsHeterologous expressionL. biflexaFunctional genetic analysisCultured cellsPathogen-specific proteinsVirulence-associated phenotypesSaprophytic L. biflexaPathogenesis of leptospirosisImmunoglobulin-like proteinEukaryotic cellsKey virulence factorsExtracellular matrix componentsLeptospiral immunoglobulin-like (Lig) proteinsSurrogate hostLig geneLeptospira biflexa serovar patocMolecular basisReplicative plasmidGenetic analysisLig proteinsSurface localizationCell adhesionSurface proteinsVirulence factorsLigB
2008
Targeted Mutagenesis in Pathogenic Leptospira Species: Disruption of the LigB Gene Does Not Affect Virulence in Animal Models of Leptospirosis
Croda J, Figueira CP, Wunder EA, Santos CS, Reis MG, Ko AI, Picardeau M. Targeted Mutagenesis in Pathogenic Leptospira Species: Disruption of the LigB Gene Does Not Affect Virulence in Animal Models of Leptospirosis. Infection And Immunity 2008, 76: 5826-5833. PMID: 18809657, PMCID: PMC2583567, DOI: 10.1128/iai.00989-08.Peer-Reviewed Original ResearchConceptsPathogenic Leptospira speciesLeptospira speciesAcute disease manifestationsPersistent renal colonizationInoculation of ratsDisease manifestationsHamster modelRenal colonizationPathogenic mechanismsAnimal modelsPersistent colonizationDecrease virulenceLeptospira interrogansHomologous recombinationLeptospirosisVirulence factorsBacterial adherenceImmunoblot analysisCorresponding chromosomal locusWild-type strainCultured cellsFirst evidenceSpectinomycin resistance geneRepeat proteinsTargeted Mutagenesis
2001
Leptospiral Proteins Recognized during the Humoral Immune Response to Leptospirosis in Humans
Guerreiro H, Croda J, Flannery B, Mazel M, Matsunaga J, Reis M, Levett P, Ko A, Haake D. Leptospiral Proteins Recognized during the Humoral Immune Response to Leptospirosis in Humans. Infection And Immunity 2001, 69: 4958-4968. PMID: 11447174, PMCID: PMC98588, DOI: 10.1128/iai.69.8.4958-4968.2001.Peer-Reviewed Original ResearchConceptsHumoral immune responseImmune responseNatural infectionLeptospiral proteinsInfection-associated antigenConvalescent-phase seraPositive reactionConvalescent phaseHumoral responseHealthy individualsHuman leptospirosisControl individualsVaccine designImmunodominant antigensQuantitative immunoblot analysisTwo-dimensional immunoblotsProtein antigensPathogenic leptospiral strainsGenus LeptospiraInfectionAntigenLeptospirosisSerumImmunodominant proteinsPatients