2024
Is it time to reduce the length of postgraduate training for physician-scientists in internal medicine?
Gallagher E, Conlin P, Kazmierczak B, Vyas J, Ajijola O, Kontos C, Baiocchi R, Rhee K, Hu P, Isales C, Williams C, Rockey D. Is it time to reduce the length of postgraduate training for physician-scientists in internal medicine? JCI Insight 2024, 9: e178214. PMID: 38775155, PMCID: PMC11141926, DOI: 10.1172/jci.insight.178214.Peer-Reviewed Original ResearchConceptsMedical school graduatesCareer development awardsInternal medicine residency graduatesResidency graduatesRetention of physician-scientistsInternal medicinePostgraduate trainingPhysician-scientistsSchool graduatesK awardsK awardeesMD-PhD graduatesPatient careComplete trainingTraining durationMedian timeMedical knowledgeDevelopment AwardNIH RePORTERTrainingIK2GraduatesAwardeesMedicineCareInterventions to support fellowship application success among predoctoral physician-scientists
Fitzsimonds R, Gorelick F, Kazmierczak B. Interventions to support fellowship application success among predoctoral physician-scientists. JCI Insight 2024, 9: e175857. PMID: 38456505, PMCID: PMC10972582, DOI: 10.1172/jci.insight.175857.Peer-Reviewed Original Research
2023
Structural insights into the career path between pre- and postgraduate physician-scientist training programs
Williams C, Gallagher E, Rockey D, Ajijola O, Hu P, Kazmierczak B, Kontos C, Vyas J, Zaidi M, Rhee K. Structural insights into the career path between pre- and postgraduate physician-scientist training programs. ELife 2023, 12: e87148. PMID: 37782020, PMCID: PMC10545427, DOI: 10.7554/elife.87148.Peer-Reviewed Original ResearchIdentification of Efflux Substrates Using a Riboswitch-Based Reporter in Pseudomonas aeruginosa
Urdaneta-Páez V, Hamchand R, Anthony K, Crawford J, Sutherland A, Kazmierczak B. Identification of Efflux Substrates Using a Riboswitch-Based Reporter in Pseudomonas aeruginosa. MSphere 2023, 8: e00069-23. PMID: 36946743, PMCID: PMC10117056, DOI: 10.1128/msphere.00069-23.Peer-Reviewed Original ResearchConceptsLiquid chromatography-mass spectrometryCompound uptakeHigh-resolution liquid chromatography-mass spectrometryChromatography-mass spectrometryNovel antibioticsHigh-throughput screeningRational designMore rational designChemical librariesDiverse compoundsInitial hitsSelect compoundsPermeable compoundsDrug candidatesCompoundsStructural propertiesBacterial cellsPowerful methodAntifolate drugsSubstrateSpectrometrySynthesisPseudomonas aeruginosaClasses of antibioticsMembrane
2022
Assessment of polymicrobial interactions in bacterial isolates from transfused platelet units associated with sepsis
Kerantzas CA, Merwede J, Snyder EL, Hendrickson JE, Tormey CA, Kazmierczak BI, Peaper DR. Assessment of polymicrobial interactions in bacterial isolates from transfused platelet units associated with sepsis. Transfusion 2022, 62: 2458-2463. PMID: 36178430, DOI: 10.1111/trf.17136.Peer-Reviewed Original ResearchConceptsAcinetobacter calcoaceticus-baumannii complexBlood productsS. saprophyticusPlatelet unitsContaminated blood productsCDC investigationsApheresis platelet productsTransfusion reactionsPolymicrobial contaminationPlatelet productsDisease controlBacterial isolatesStudy designStaphylococcus saprophyticusPolymicrobial interactionsCDC casesSaprophyticusFuture studiesPotential interactionsCommon sourceSepsisIsolatesCasesCoaggregationPearls of wisdom for aspiring physician-scientist residency applicants and program directors
Gallagher EJ, Rockey DC, Kontos CD, Vyas JM, Brass LF, Hu PJ, Isales CM, Ajijola OA, Rathmell WK, Conlin PR, Baiocchi RA, Kazmierczak BI, Akabas MH, Williams CS. Pearls of wisdom for aspiring physician-scientist residency applicants and program directors. JCI Insight 2022, 7: e158467. PMID: 35315364, PMCID: PMC8986063, DOI: 10.1172/jci.insight.158467.Peer-Reviewed Original Research
2021
A Primed Subpopulation of Bacteria Enables Rapid Expression of the Type 3 Secretion System in Pseudomonas aeruginosa
Lin CK, Lee DSW, McKeithen-Mead S, Emonet T, Kazmierczak B. A Primed Subpopulation of Bacteria Enables Rapid Expression of the Type 3 Secretion System in Pseudomonas aeruginosa. MBio 2021, 12: 10.1128/mbio.00831-21. PMID: 34154400, PMCID: PMC8262847, DOI: 10.1128/mbio.00831-21.Peer-Reviewed Original ResearchConceptsType 3 secretion systemSecretion systemT3SS expressionVirulence traitsSpecific virulence traitsHuman disease severityComplex nanomachinesT3SS genesP. aeruginosa cellsReproductive fitnessIsogenic cellsHeterogeneous expressionCell envelopeT3SS effectorsMotility organellesReservoir of cellsCritical virulence traitsGene expressionRegulatory mechanismsSubpopulation of cellsGram-negative pathogensFluorescent reportersDivision timeP. aeruginosaPseudomonas aeruginosa
2020
Co-Culture of Acinetobacter calcoaceticus-baumannii complex and Staphylococcus saprophyticus Supports Simple Point Contamination Model in Recent Cases of Transfusion-Related Sepsis
Kerantzas C, Merwede J, Snyder E, Hendrickson J, Tormey C, Kazmierczak B, Peaper D. Co-Culture of Acinetobacter calcoaceticus-baumannii complex and Staphylococcus saprophyticus Supports Simple Point Contamination Model in Recent Cases of Transfusion-Related Sepsis. American Journal Of Clinical Pathology 2020, 154: s14-s14. DOI: 10.1093/ajcp/aqaa137.025.Peer-Reviewed Original ResearchThe Enemy of my Enemy: Bacterial Competition in the Cystic Fibrosis Lung
Kazmierczak BI. The Enemy of my Enemy: Bacterial Competition in the Cystic Fibrosis Lung. Cell Host & Microbe 2020, 28: 502-504. PMID: 33031766, DOI: 10.1016/j.chom.2020.09.009.Peer-Reviewed Original ResearchHfq and sRNA 179 Inhibit Expression of the Pseudomonas aeruginosa cAMP-Vfr and Type III Secretion Regulons
Janssen KH, Corley JM, Djapgne L, Cribbs JT, Voelker D, Slusher Z, Nordell R, Regulski EE, Kazmierczak BI, McMackin EW, Yahr TL. Hfq and sRNA 179 Inhibit Expression of the Pseudomonas aeruginosa cAMP-Vfr and Type III Secretion Regulons. MBio 2020, 11: 10.1128/mbio.00363-20. PMID: 32546612, PMCID: PMC7298702, DOI: 10.1128/mbio.00363-20.Peer-Reviewed Original ResearchMeSH KeywordsBacterial ProteinsCyclic AMP Receptor ProteinCyclic AMP-Dependent Protein KinasesGene Expression Regulation, BacterialGene LibraryHost Factor 1 ProteinPromoter Regions, GeneticPseudomonas aeruginosaRegulonRNA, BacterialRNA, Small UntranslatedTranscription, GeneticType III Secretion SystemsVirulence FactorsConceptsSmall noncoding RNAsType III secretion systemSecretion systemNoncoding RNAsGene expressionTranscription factorsExpression libraryGac/Rsm systemType VI secretion systemT3SS gene expressionCAMP-responsive transcription factorRNA-binding proteinVirulence factorsGram-negative opportunistic pathogenRNA chaperonesGlobal regulatorT3SS regulonMutant lackingTarget mRNAsCritical virulence factorImportant virulence factorMRNA targetsHfqRegulonRsm systemGlobal chemical effects of the microbiome include new bile-acid conjugations
Quinn RA, Melnik AV, Vrbanac A, Fu T, Patras KA, Christy MP, Bodai Z, Belda-Ferre P, Tripathi A, Chung LK, Downes M, Welch RD, Quinn M, Humphrey G, Panitchpakdi M, Weldon KC, Aksenov A, da Silva R, Avila-Pacheco J, Clish C, Bae S, Mallick H, Franzosa EA, Lloyd-Price J, Bussell R, Thron T, Nelson AT, Wang M, Leszczynski E, Vargas F, Gauglitz JM, Meehan MJ, Gentry E, Arthur TD, Komor AC, Poulsen O, Boland BS, Chang JT, Sandborn WJ, Lim M, Garg N, Lumeng JC, Xavier RJ, Kazmierczak BI, Jain R, Egan M, Rhee KE, Ferguson D, Raffatellu M, Vlamakis H, Haddad GG, Siegel D, Huttenhower C, Mazmanian SK, Evans RM, Nizet V, Knight R, Dorrestein PC. Global chemical effects of the microbiome include new bile-acid conjugations. Nature 2020, 579: 123-129. PMID: 32103176, PMCID: PMC7252668, DOI: 10.1038/s41586-020-2047-9.Peer-Reviewed Original ResearchConceptsChemical interactionChemistryBile acid synthesis genesChemical effectsInflammatory bowel diseaseBile acid conjugatesCompoundsHost bile acidsMolecular familiesBile acid conjugationBowel diseaseGut diseasesMicrobiome dysbiosisConjugationAcidFree miceAmino acid conjugationBile acidsCystic fibrosisX receptorAcid conjugationReduced expressionFurther studiesDiseaseMiceA Screen for Antibiotic Resistance Determinants Reveals a Fitness Cost of the Flagellum in Pseudomonas aeruginosa
Rundell EA, Commodore N, Goodman AL, Kazmierczak BI. A Screen for Antibiotic Resistance Determinants Reveals a Fitness Cost of the Flagellum in Pseudomonas aeruginosa. Journal Of Bacteriology 2020, 202: 10.1128/jb.00682-19. PMID: 31871033, PMCID: PMC7043666, DOI: 10.1128/jb.00682-19.Peer-Reviewed Original ResearchConceptsFlagellar assemblyFitness advantageFitness costsCell envelopeOuter membrane barrier functionOuter membrane biogenesisUnbiased high-throughput approachOuter membrane barrierMembrane barrier functionHigh-throughput approachMembrane biogenesisGram-negative bacteriaFlagellar functionInsertion sequencingOuter membraneGene productsPresence of linezolidPresence of antibioticsAntibiotic resistance determinantsMembrane barrierAntibiotic entryFitnessEfflux pumpsGlycopeptide antibiotic vancomycinGenes
2019
Modulation of flagellar rotation in surface-attached bacteria: A pathway for rapid surface-sensing after flagellar attachment
Schniederberend M, Williams JF, Shine E, Shen C, Jain R, Emonet T, Kazmierczak BI. Modulation of flagellar rotation in surface-attached bacteria: A pathway for rapid surface-sensing after flagellar attachment. PLOS Pathogens 2019, 15: e1008149. PMID: 31682637, PMCID: PMC6855561, DOI: 10.1371/journal.ppat.1008149.Peer-Reviewed Original ResearchConceptsFlagellar rotationSurface-attached bacteriaGram-negative opportunistic pathogen Pseudomonas aeruginosaOpportunistic pathogen Pseudomonas aeruginosaSwitch complex proteinsSingle polar flagellumBiofilm formationSurface-associated behaviorsSurface-associated structuresType IV piliPathogen Pseudomonas aeruginosaGenetic screenPolar flagellumTranscriptional programsBiofilm initiationComplex proteinsMutant bacteriaFlagellar attachmentSecond messengerP. aeruginosaFlhFBacteriaFlagellaPathwayAltered behaviorNew Twists and Turns in Bacterial Locomotion and Signal Transduction
Watts KJ, Vaknin A, Fuqua C, Kazmierczak BI. New Twists and Turns in Bacterial Locomotion and Signal Transduction. Journal Of Bacteriology 2019, 201: 10.1128/jb.00439-19. PMID: 31358610, PMCID: PMC6755736, DOI: 10.1128/jb.00439-19.Peer-Reviewed Original ResearchConceptsSignal transductionTwo-component signal transduction pathwayTwo-component signal transduction systemBacterial locomotionContribution of motilityCryo-electron tomographySignal transduction systemSystems biology approachSignal transduction pathwaysIndividual bacterial cellsMulticellular organismsProkaryotic organismsBiology approachChemosensory receptorsFlagellar motorPathogenic interactionsTransduction pathwaysTransduction systemIndividual proteinsSensing pathwaysProtein labelingBehavior of thousandsComplex ecosystemsProtein spaceLiving cellsIn Situ Structures of Polar and Lateral Flagella Revealed by Cryo-Electron Tomography
Zhu S, Schniederberend M, Zhitnitsky D, Jain R, Galán JE, Kazmierczak BI, Liu J. In Situ Structures of Polar and Lateral Flagella Revealed by Cryo-Electron Tomography. Journal Of Bacteriology 2019, 201: 10.1128/jb.00117-19. PMID: 31010901, PMCID: PMC6560136, DOI: 10.1128/jb.00117-19.Peer-Reviewed Original ResearchConceptsCryo-electron tomographyBacterial flagellaFlagellar assemblyPolar flagellumPeritrichous flagellaSerovar TyphimuriumSpecies-specific featuresBacterial pathogensOuter membrane complexSelf-assembling nanomachineFlagellar systemFlagellar structureFlagellar numberSubtomogram averagingMembrane complexLateral flagellaStructural basisDistinct flagellaMolecular machinesFlagellaSitu structureModel systemPseudomonasTyphimuriumRange of variationShould I Stay or Should I Go? Pseudomonas Just Can’t Decide
Jain R, Kazmierczak BI. Should I Stay or Should I Go? Pseudomonas Just Can’t Decide. Cell Host & Microbe 2019, 25: 5-7. PMID: 30629919, DOI: 10.1016/j.chom.2018.12.011.Peer-Reviewed Original Research
2018
Host suppression of quorum sensing during catheter-associated urinary tract infections
Cole SJ, Hall CL, Schniederberend M, Farrow III JM, Goodson JR, Pesci EC, Kazmierczak BI, Lee VT. Host suppression of quorum sensing during catheter-associated urinary tract infections. Nature Communications 2018, 9: 4436. PMID: 30361690, PMCID: PMC6202348, DOI: 10.1038/s41467-018-06882-y.Peer-Reviewed Original ResearchConceptsCatheter-associated urinary tract infectionsUrinary tract infectionTract infectionsChronic bacterial infectionP. aeruginosaAntibiotic therapyUrinary tractDevice-associated biofilmsMurine modelHost immunityClinical isolatesBacterial infectionsInfectionPseudomonas aeruginosaUrineAeruginosaTherapyRegulated genesImmunityTract
2017
Determining Phosphodiesterase Activity (Radioactive Assay)
Kazmierczak BI. Determining Phosphodiesterase Activity (Radioactive Assay). Methods In Molecular Biology 2017, 1657: 279-283. PMID: 28889301, DOI: 10.1007/978-1-4939-7240-1_21.Peer-Reviewed Original ResearchSynthesis of [32P]-c-di-GMP for Diguanylate Cyclase and Phosphodiesterase Activity Determinations
Kazmierczak BI. Synthesis of [32P]-c-di-GMP for Diguanylate Cyclase and Phosphodiesterase Activity Determinations. Methods In Molecular Biology 2017, 1657: 23-29. PMID: 28889283, DOI: 10.1007/978-1-4939-7240-1_3.Peer-Reviewed Original ResearchDetermining Diguanylate Cyclase Activity (Radioactive Assay)
Kazmierczak BI. Determining Diguanylate Cyclase Activity (Radioactive Assay). Methods In Molecular Biology 2017, 1657: 285-289. PMID: 28889302, DOI: 10.1007/978-1-4939-7240-1_22.Peer-Reviewed Original Research