2019
Discovery and Contribution of Nontypeable Haemophilus influenzae NTHI1441 to Human Respiratory Epithelial Cell Invasion
Ahearn C, Kirkham C, Chaves L, Kong Y, Pettigrew M, Murphy T. Discovery and Contribution of Nontypeable Haemophilus influenzae NTHI1441 to Human Respiratory Epithelial Cell Invasion. Infection And Immunity 2019, 87: 10.1128/iai.00462-19. PMID: 31427451, PMCID: PMC6803334, DOI: 10.1128/iai.00462-19.Peer-Reviewed Original ResearchConceptsChronic obstructive pulmonary diseaseRespiratory epithelial cellsEnzyme-linked immunosorbent assayEpithelial cellsAirways of adultsObstructive pulmonary diseaseCell invasionHuman respiratory epithelial cellsNontypeable Haemophilus influenzaeCell enzyme-linked immunosorbent assayAlveolar epithelial cellsAcute exacerbationLower airwaysPulmonary diseaseSerum IgGNTHi strainsTherapeutic interventionsHaemophilus influenzaeHuman bronchialSurface-exposed epitopesEpithelial cell invasionIsogenic knockout mutantsNTHiImmunosorbent assayIntracellular survival
2017
Immunoglobulin A Protease Variants Facilitate Intracellular Survival in Epithelial Cells By Nontypeable Haemophilus influenzae That Persist in the Human Respiratory Tract in Chronic Obstructive Pulmonary Disease
Murphy TF, Kirkham C, Gallo MC, Yang Y, Wilding GE, Pettigrew MM. Immunoglobulin A Protease Variants Facilitate Intracellular Survival in Epithelial Cells By Nontypeable Haemophilus influenzae That Persist in the Human Respiratory Tract in Chronic Obstructive Pulmonary Disease. The Journal Of Infectious Diseases 2017, 216: 1295-1303. PMID: 28968876, PMCID: PMC5853902, DOI: 10.1093/infdis/jix471.Peer-Reviewed Original ResearchConceptsChronic obstructive pulmonary diseaseNontypeable Haemophilus influenzaeObstructive pulmonary diseaseExpression of IgARespiratory epithelial cellsLysosomal-associated membrane protein 1Pulmonary diseaseEpithelial cellsIntracellular survivalHaemophilus influenzaeHuman respiratory epithelial cellsPathogenesis of infectionHuman respiratory tractIgA proteasePassage of strainsMembrane protein 1Host cellsProtease expressionNTHi infectionNTHi isolatesRespiratory tractHost epithelial cellsIgAIntracellular persistenceReduced survival
2014
Dynamic Changes in the Streptococcus pneumoniae Transcriptome during Transition from Biofilm Formation to Invasive Disease upon Influenza A Virus Infection
Pettigrew MM, Marks LR, Kong Y, Gent JF, Roche-Hakansson H, Hakansson AP. Dynamic Changes in the Streptococcus pneumoniae Transcriptome during Transition from Biofilm Formation to Invasive Disease upon Influenza A Virus Infection. Infection And Immunity 2014, 82: 4607-4619. PMID: 25135685, PMCID: PMC4249342, DOI: 10.1128/iai.02225-14.Peer-Reviewed Original ResearchConceptsWhole transcriptome shotgun sequencingPneumococcal transcriptomeTransparent colony phenotypeVirus infectionTranscriptional differencesShotgun sequencingUpregulated genesFebrile range temperaturesColony phenotypeInfluenza A Virus InfectionNutrient availabilityTranscriptomeS. pneumoniae pathogenesisA virus infectionProduction of bacteriocinsHost immune responsePlanktonic cellsBiofilm formationGenesPlanktonic bacteriaBiofilm bacteriaExtracellular ATPCarbohydrate metabolismBacteriaEnzymatic assay