2012
Anaplasma phagocytophilum Asp14 Is an Invasin That Interacts with Mammalian Host Cells via Its C Terminus To Facilitate Infection
Kahlon A, Ojogun N, Ragland SA, Seidman D, Troese MJ, Ottens AK, Mastronunzio JE, Truchan HK, Walker NJ, Borjesson DL, Fikrig E, Carlyon JA. Anaplasma phagocytophilum Asp14 Is an Invasin That Interacts with Mammalian Host Cells via Its C Terminus To Facilitate Infection. Infection And Immunity 2012, 81: 65-79. PMID: 23071137, PMCID: PMC3536139, DOI: 10.1128/iai.00932-12.Peer-Reviewed Original ResearchMeSH KeywordsAmino Acid SequenceAnaplasma phagocytophilumAnimalsBacterial Outer Membrane ProteinsBinding SitesCell AdhesionCell Line, TumorEhrlichiaEhrlichiosisGene Expression Regulation, BacterialGlutathione TransferaseHL-60 CellsHumansMembrane GlycoproteinsMembrane ProteinsMiceMolecular Sequence DataProtein BindingProtein Structure, TertiaryProteomeSequence Analysis, ProteinTranscription, GeneticUp-RegulationConceptsMammalian host cellsHost cellsReticulate cellsOuter membrane protein candidatesSurface proteinsOuter membrane protein AMembrane protein AA. phagocytophilum-infected ticksObligate intracellular bacteriumA. phagocytophilumGlutathione S-transferaseTranscriptional profilingSurface proteomeC-terminusAffinity purificationFamily AnaplasmataceaeProtein candidatesSelective biotinylationCellular invasionAsp14Transmission feedingAmino acidsS-transferaseIntracellular bacteriumP-selectin glycoprotein ligand-1Activation of the RpoN-RpoS regulatory pathway during the enzootic life cycle of Borrelia burgdorferi
Ouyang Z, Narasimhan S, Neelakanta G, Kumar M, Pal U, Fikrig E, Norgard MV. Activation of the RpoN-RpoS regulatory pathway during the enzootic life cycle of Borrelia burgdorferi. BMC Microbiology 2012, 12: 44. PMID: 22443136, PMCID: PMC3320556, DOI: 10.1186/1471-2180-12-44.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsBacterial ProteinsBorrelia burgdorferiGene Expression ProfilingGene Expression Regulation, BacterialHost-Parasite InteractionsLipoproteinsLyme DiseaseMiceNymphRNA Polymerase Sigma 54Sigma FactorTicksConceptsRpoN-RpoS regulatory pathwayRpoN-RpoS pathwayExpression of rpoSEnzootic life cycleMammalian infectionRegulatory pathwaysTranscription of rpoSOuter membrane lipoproteinLife cycleB. burgdorferiKey environmental stimuliLyme disease pathogenesisDiverse nichesMembrane lipoproteinMammalian hostsTarget genesTranscription levelsMicrobial survivalLipoprotein geneRpoSOrganism adaptationInfectious cycleFed larvaeIntermolt larvaeSustained transcriptionPostgenomic Analyses Reveal Development of Infectious Anaplasma phagocytophilum during Transmission from Ticks to Mice
Mastronunzio JE, Kurscheid S, Fikrig E. Postgenomic Analyses Reveal Development of Infectious Anaplasma phagocytophilum during Transmission from Ticks to Mice. Journal Of Bacteriology 2012, 194: 2238-2247. PMID: 22389475, PMCID: PMC3347074, DOI: 10.1128/jb.06791-11.Peer-Reviewed Original ResearchMeSH KeywordsAnaplasma phagocytophilumAnimalsBacterial ProteinsCarbonEhrlichiosisEnergy MetabolismGene Expression ProfilingGene Expression Regulation, BacterialIxodesLarvaMiceNymphRNA, BacterialSalivary GlandsTranscription, GeneticUp-RegulationConceptsOpen reading frameA. phagocytophilum genomeObligate intracellular bacteriaBlood-feeding arthropodsCell surface proteinsMammalian cell cultureRickettsiales orderUncharacterized proteinsRibosomal proteinsEssential proteinsTranscriptome sequencingBacterial adaptationA. phagocytophilumDNA replicationTick salivary glandsPostgenomic analysisReading frameMammalian hostsAnaplasma phagocytophilumDevelopmental transitionsDC-specific markerIntracellular bacteriaTransmission feedingSurface proteinsProtein
2008
Anaplasma phagocytophilum Increases Cathepsin L Activity, Thereby Globally Influencing Neutrophil Function
Thomas V, Samanta S, Fikrig E. Anaplasma phagocytophilum Increases Cathepsin L Activity, Thereby Globally Influencing Neutrophil Function. Infection And Immunity 2008, 76: 4905-4912. PMID: 18765732, PMCID: PMC2573316, DOI: 10.1128/iai.00851-08.Peer-Reviewed Original ResearchMeSH KeywordsAnaplasma phagocytophilumCathepsin LCathepsinsCysteine EndopeptidasesEhrlichiosisElectrophoretic Mobility Shift AssayGene Expression Regulation, BacterialHL-60 CellsHomeodomain ProteinsHumansImmunoblottingImmunoprecipitationNeutrophilsNuclear ProteinsRepressor ProteinsReverse Transcriptase Polymerase Chain ReactionTranscription FactorsConceptsA. phagocytophilum infectionPhagocytophilum infectionCathepsin L activityNeutrophil functionA. phagocytophilumL activityHuman neutrophil peptides 1Polymorphonuclear leukocyte functionNeutrophil peptide-1Human granulocytic anaplasmosisTherapeutic optionsNeutrophil defenseLeukocyte functionCathepsin LPeptide-1InfectionObligate intracellular pathogensMarked reductionGranulocytic anaplasmosisIntracellular pathogensCDP activityHost oxidative burstAnaplasma phagocytophilumPhagocytophilumOxidative burst
2007
Borrelia burgdorferi basic membrane proteins A and B participate in the genesis of Lyme arthritis
Pal U, Wang P, Bao F, Yang X, Samanta S, Schoen R, Wormser GP, Schwartz I, Fikrig E. Borrelia burgdorferi basic membrane proteins A and B participate in the genesis of Lyme arthritis. Journal Of Experimental Medicine 2007, 205: 133-141. PMID: 18166585, PMCID: PMC2234379, DOI: 10.1084/jem.20070962.Peer-Reviewed Original ResearchConceptsLyme arthritisMouse jointsB. burgdorferi antigensBurgdorferi-infected miceSevere arthritisSpirochete numbersArthritisHost responseLyme diseaseAffinity-purified antibodiesBorrelia burgdorferiChain reactionMiceOriginal phenotypeBasic membrane proteinMutant spirochetesGene expressionJointsInflammationPathogenesisAntigenDiseaseB. burgdorferi gene expressionRole of Outer Surface Protein D in the Borrelia burgdorferi Life Cycle
Li X, Neelakanta G, Liu X, Beck DS, Kantor FS, Fish D, Anderson JF, Fikrig E. Role of Outer Surface Protein D in the Borrelia burgdorferi Life Cycle. Infection And Immunity 2007, 75: 4237-4244. PMID: 17620358, PMCID: PMC1951184, DOI: 10.1128/iai.00632-07.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsBacterial Outer Membrane ProteinsBorrelia burgdorferiDisease Models, AnimalFemaleGene Expression Regulation, BacterialHumansIxodesLyme DiseaseMiceMice, Inbred C3HMutationConceptsB. burgdorferiSecond blood mealMurine modelSpirochete transmissionB. burgdorferi persistenceLyme borreliosisMiceB. burgdorferi strainsProtein DI. scapularisTick gutBlood mealBurgdorferi strainsSpirochete life cycleBurgdorferiGut extractsIxodes scapularisB. burgdorferi infectivityThreefold decreaseHost-specific signalsScapularisTicksBorreliosis
2006
Borrelia burgdorferi–Traveling incognito?
Fikrig E, Narasimhan S. Borrelia burgdorferi–Traveling incognito? Microbes And Infection 2006, 8: 1390-1399. PMID: 16698304, DOI: 10.1016/j.micinf.2005.12.022.Peer-Reviewed Reviews, Practice Guidelines, Standards, and Consensus StatementsAnimalsArachnid VectorsBacterial ProteinsBorrelia burgdorferiGene Expression Regulation, BacterialHumansIxodesLyme Disease
2004
Borrelia burgdorferi Changes Its Surface Antigenic Expression in Response to Host Immune Responses
Liang FT, Yan J, Mbow ML, Sviat SL, Gilmore RD, Mamula M, Fikrig E. Borrelia burgdorferi Changes Its Surface Antigenic Expression in Response to Host Immune Responses. Infection And Immunity 2004, 72: 5759-5767. PMID: 15385475, PMCID: PMC517580, DOI: 10.1128/iai.72.10.5759-5767.2004.Peer-Reviewed Original ResearchConceptsSurface antigenic expressionAntigenic expressionImmune attackImmune responseSevere combined immunodeficiency miceHostile immune environmentVigorous immune responseB. burgdorferiCombined immunodeficiency miceHost immune responseOspC antibodiesOuter surface protein CImmune environmentDecorin-binding protein AImmunocompetent miceImmune conditionsImmunodeficiency miceSurface protein CImmune pressureVlsE expressionLyme disease spirocheteProtein CBorrelia burgdorferiOspC expressionMammalian infectionBorrelia burgdorferi outer surface protein (osp) B expression independent of ospA
Liang FT, Caimano MJ, Radolf JD, Fikrig E. Borrelia burgdorferi outer surface protein (osp) B expression independent of ospA. Microbial Pathogenesis 2004, 37: 35-40. PMID: 15194158, DOI: 10.1016/j.micpath.2004.02.007.Peer-Reviewed Original ResearchAnimalsAntibodies, BacterialAntigens, BacterialAntigens, SurfaceBacterial Outer Membrane ProteinsBacterial VaccinesBorrelia burgdorferiDisease Models, AnimalGene Expression Regulation, BacterialLipoproteinsLyme DiseaseMiceMice, Inbred BALB CMice, SCIDPromoter Regions, GeneticRNA, BacterialRNA, MessengerTicksTranscription, Genetic
2003
Borrelia burgdorferi transcriptome in the central nervous system of non-human primates
Narasimhan S, Camaino M, Liang FT, Santiago F, Laskowski M, Philipp MT, Pachner AR, Radolf JD, Fikrig E. Borrelia burgdorferi transcriptome in the central nervous system of non-human primates. Proceedings Of The National Academy Of Sciences Of The United States Of America 2003, 100: 15953-15958. PMID: 14671329, PMCID: PMC307674, DOI: 10.1073/pnas.2432412100.Peer-Reviewed Original ResearchConceptsNon-human primate modelB. burgdorferiEffect of dexamethasoneCentral nervous systemHost metabolic pathwaysNon-human primatesNeurological symptomsPaucibacillary natureCNS milieuImmune statusCommon manifestationPrimate modelNervous systemExpression profilesLyme diseaseHost factorsHeart tissueGene expressionB. burgdorferi transcriptomeBorrelia burgdorferiNHPNeuroborreliosisImmunocompetentVivo gene expressionBurgdorferiAdaptation of Borrelia burgdorferi in the tick and the mammalian host
Anguita J, Hedrick MN, Fikrig E. Adaptation of Borrelia burgdorferi in the tick and the mammalian host. FEMS Microbiology Reviews 2003, 27: 493-504. PMID: 14550942, DOI: 10.1016/s0168-6445(03)00036-6.Peer-Reviewed Original ResearchMeSH KeywordsAdaptation, PhysiologicalAnimalsBorrelia burgdorferiGene Expression Regulation, BacterialHumansLyme DiseaseMammalsTicksConceptsMammalian hostsGene expressionRegulation of genesAdaptation of BorreliaGene productsDifferent environmentsArthropod vectorsEnzootic cycleCurrent knowledgeLife cycleHostExpressionCausative agentB. burgdorferiBorrelia burgdorferiGenesSpirochetesTicksBurgdorferiMicroorganismsGreater abilityRegulationLyme diseaseThorough understandingFunctionAdaptation of Borrelia burgdorferi in the vector and vertebrate host
Pal U, Fikrig E. Adaptation of Borrelia burgdorferi in the vector and vertebrate host. Microbes And Infection 2003, 5: 659-666. PMID: 12787742, DOI: 10.1016/s1286-4579(03)00097-2.Peer-Reviewed Original ResearchMeSH KeywordsAdaptation, PhysiologicalAnimalsArachnid VectorsBorrelia burgdorferiDisease VectorsGene Expression Regulation, BacterialHost-Parasite InteractionsLyme DiseaseTicksVertebratesConceptsComplex enzootic cycleUnique adaptive featuresDifferent host environmentsAdaptation of BorreliaMolecular adaptationsRegulatory mechanismsB. burgdorferiHost environmentSensu latoEnzootic cycleExtracellular pathogensDomestic animalsAdaptive featuresBorrelia burgdorferi sensu latoHostBurgdorferi sensu latoCausative agentDiverse rangeArthropodsAdaptationLatoBurgdorferiPathogensLyme diseaseBorrelia
1997
Borrelia burgdorferi P35 and P37 Proteins, Expressed In Vivo, Elicit Protective Immunity
Fikrig E, Barthold S, Sun W, Feng W, Telford S, Flavell R. Borrelia burgdorferi P35 and P37 Proteins, Expressed In Vivo, Elicit Protective Immunity. Immunity 1997, 6: 531-539. PMID: 9175831, DOI: 10.1016/s1074-7613(00)80341-6.Peer-Reviewed Original ResearchMeSH KeywordsAmino Acid SequenceAnimalsAntibodies, BacterialBacterial ProteinsBase SequenceBorrelia burgdorferi GroupFemaleGene Expression Regulation, BacterialHumansImmunity, ActiveLyme DiseaseMiceMice, Inbred C3HMolecular Sequence DataConceptsElicit protective immunityB. burgdorferiIgG titersProtective immunityInfected miceImmune responseHost immunityLyme borreliosisRT-PCR analysisMiceVivo-expressed antigensBorrelia burgdorferi genesImmunityP35BurgdorferiP37 proteinVivoNorthern blotAntiserumP37PatientsAntigenELISATitersBorreliosisTemporal pattern of Borrelia burgdorferi p21 expression in ticks and the mammalian host.
Das S, Barthold SW, Giles SS, Montgomery RR, Telford SR, Fikrig E. Temporal pattern of Borrelia burgdorferi p21 expression in ticks and the mammalian host. Journal Of Clinical Investigation 1997, 99: 987-995. PMID: 9062357, PMCID: PMC507907, DOI: 10.1172/jci119264.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsAntibodies, BacterialAntigens, BacterialAntigens, SurfaceArthritis, InfectiousBacterial Outer Membrane ProteinsBacterial ProteinsBacterial VaccinesBorrelia burgdorferi GroupElectrophoresis, Gel, Pulsed-FieldEnzyme-Linked Immunosorbent AssayFemaleFlagellinFluorescent Antibody Technique, IndirectGene Expression Regulation, BacterialHumansImmunizationImmunization, PassiveImmunoblottingIxodesLipoproteinsLyme DiseaseMiceMice, Inbred C3HPlasmidsPolymerase Chain ReactionRecombinant ProteinsRNA, MessengerTime FactorsConceptsInfected miceHumoral responseLate-stage Lyme diseaseMarkers of infectionCourse of diseaseMurine Lyme borreliosisB. burgdorferiB. burgdorferi infectionHuman humoral responseIxodes dammini ticksBurgdorferi-infected miceLyme arthritisActive immunizationMammalian hostsPassive transferBurgdorferi infectionC3H miceMurine infectionDay 14P21 antibodyP21 expressionLyme borreliosisLyme diseaseMiceInfectionArthropod- and host-specific gene expression by Borrelia burgdorferi.
de Silva AM, Fikrig E. Arthropod- and host-specific gene expression by Borrelia burgdorferi. Journal Of Clinical Investigation 1997, 99: 377-379. PMID: 9022068, PMCID: PMC507808, DOI: 10.1172/jci119169.Peer-Reviewed Original ResearchAnimalsAntigens, BacterialAntigens, SurfaceBacterial Outer Membrane ProteinsBacterial ProteinsBacterial VaccinesBorrelia burgdorferi GroupClinical Trials, Phase III as TopicDisease ReservoirsDisease VectorsGene Expression Regulation, BacterialHeminHost-Parasite InteractionsHumansIxodesLipoproteinsLyme DiseaseMicePlaguePlasminogen ActivatorsSiphonapteraVaccines, SyntheticYersinia pestis