Oluwabunmi Olaloye, MD, FAAP
Assistant ProfessorCards
About
Research
Publications
2024
Placenta and Intestinal Injury in Preterm Infants
Garg P, Weitkamp J, McDonald A, Cilvik S, Mir I, Shenberger J, Olaloye O, Konnikova L, Kallapur S, Garg P. Placenta and Intestinal Injury in Preterm Infants. American Journal Of Perinatology 2024 PMID: 38889889, DOI: 10.1055/a-2347-4135.Peer-Reviewed Original ResearchNecrotizing enterocolitisIntestinal injuryRisk factors associated with necrotizing enterocolitisDevelopment of necrotizing enterocolitisLow birth weight infantsAssociated with intestinal injuryExposure to inflammationProspective multi-center studyAt-risk infantsHuman clinical studiesMulti-center studyPreterm infantsPlacental pathologyPreterm birthImmunomodulatory treatmentIntrauterine environmentLaboratory predictorsCause of deathClinical outcomesClinical impactClinical studiesPostnatal lifeVulnerable infantsPost pregnancyTriggering inflammationSingle-cell atlas of the small intestine throughout the human lifespan demonstrates unique features of fetal immune cells
Gu W, Eke C, Santiago E, Olaloye O, Konnikova L. Single-cell atlas of the small intestine throughout the human lifespan demonstrates unique features of fetal immune cells. Mucosal Immunology 2024, 17: 599-617. PMID: 38555026, PMCID: PMC11384551, DOI: 10.1016/j.mucimm.2024.03.011.Peer-Reviewed Original ResearchImmune cellsDevelopment of mucosal immunityComplex immune landscapeFetal immune cellsSevere intestinal complicationsComplications of prematurityMemory T cellsAdaptive immune cellsMucosal immune cellsSmall intestineT cell statesMemory T cell statesStem-like propertiesNecrotizing enterocolitisNeonatal samplesMyeloid populationsImmune landscapeFetal samplesT cellsExpression of activationPostnatal samplesMucosal diseaseMucosal immunitySingle-cell RNA sequencingSingle-cell atlas
2023
Single-cell atlas of the human neonatal small intestine affected by necrotizing enterocolitis
Egozi A, Olaloye O, Werner L, Silva T, McCourt B, Pierce R, An X, Wang F, Chen K, Pober J, Shouval D, Itzkovitz S, Konnikova L. Single-cell atlas of the human neonatal small intestine affected by necrotizing enterocolitis. PLOS Biology 2023, 21: e3002124. PMID: 37205711, PMCID: PMC10234541, DOI: 10.1371/journal.pbio.3002124.Peer-Reviewed Original ResearchConceptsSingle-cell RNA sequencingSingle-cell atlasEpithelial cellsCell identityRNA sequencingBulk transcriptomicsCellular dysregulationAberrant interactionsNeonatal small intestinePotential targetCellular changesBiomarker discoveryGastrointestinal complicationsPremature infantsProinflammatory macrophagesProinflammatory genesClonal expansionT cellsEndothelial cellsImmune interactionsIntestinal tissueCellsSmall intestineComprehensive viewNECSingle cell analysis via mass cytometry of spontaneous intestinal perforation reveals alterations in small intestinal innate and adaptive mucosal immunity
Olaloye O, Eke C, Jolteus A, Konnikova L. Single cell analysis via mass cytometry of spontaneous intestinal perforation reveals alterations in small intestinal innate and adaptive mucosal immunity. Frontiers In Immunology 2023, 14: 995558. PMID: 36825028, PMCID: PMC9941693, DOI: 10.3389/fimmu.2023.995558.Peer-Reviewed Original ResearchConceptsSpontaneous intestinal perforationMucosal immune dysfunctionSevere gastrointestinal complicationsSmall intestinal mucosaMass cytometry timeGastrointestinal complicationsIntestinal perforationEnteral feedsImmune dysfunctionPremature infantsWeeks' gestationTerminal ileumCytometry timeIntestinal mucosaDisease pathogenesisLocalized perforationFirst weekPatientsSurgeryGestationPerforationPrematurityComplicationsDysfunctionMucosa
2022
Immune landscape of human placental villi using single-cell analysis
Toothaker JM, Olaloye O, McCourt BT, McCourt CC, Silva TN, Case RM, Liu P, Yimlamai D, Tseng G, Konnikova L. Immune landscape of human placental villi using single-cell analysis. Development 2022, 149 PMID: 35050308, PMCID: PMC8935213, DOI: 10.1242/dev.200013.Peer-Reviewed Original ResearchMeSH KeywordsAntigens, CDAntigens, Differentiation, MyelomonocyticB7-H1 AntigenB-LymphocytesChorionic VilliFemaleFetusFlow CytometryHLA-DR AntigensHumansKiller Cells, NaturalLeukocyte Common AntigensLymphocyte ActivationMacrophagesMemory T CellsPlacentaPregnancyPregnancy Trimester, SecondReceptors, Cell SurfaceReceptors, ChemokineSingle-Cell AnalysisT-LymphocytesConceptsT cellsHuman placental villiPlacental villiImmune systemFetal immune systemMaternal immune systemFetal immune cellsAdult T-cellT cell receptor stimulationCell receptor stimulationHealthy pregnancyImmune landscapeMemory phenotypeImmune cellsFetal organsEnhanced proliferative capacityReceptor stimulationMultiple subtypesPV tissueComplex immune systemImaging modalitiesMass cytometryProliferative capacityMaternal mechanismsRecent reports
2021
CD16+CD163+ monocytes traffic to sites of inflammation during necrotizing enterocolitis in premature infants
Olaloye OO, Liu P, Toothaker JM, McCourt BT, McCourt CC, Xiao J, Prochaska E, Shaffer S, Werner L, Faculty U, Faculty U, Gringauz J, Good M, Goldsmith JD, An X, Wang F, Snapper SB, Shouval D, Chen K, Tseng G, Konnikova L. CD16+CD163+ monocytes traffic to sites of inflammation during necrotizing enterocolitis in premature infants. Journal Of Experimental Medicine 2021, 218: e20200344. PMID: 34269788, PMCID: PMC8289692, DOI: 10.1084/jem.20200344.Peer-Reviewed Original ResearchMeSH KeywordsAntigens, CDAntigens, Differentiation, MyelomonocyticBlood VesselsCase-Control StudiesChemotaxisEnterocolitis, NecrotizingGastric MucosaGPI-Linked ProteinsHumansInfantInfant, NewbornIntestine, SmallMonocytesNeutropeniaNeutrophilsPhagocytosisReactive Oxygen SpeciesReceptors, Cell SurfaceReceptors, IgGSequence Analysis, RNASingle-Cell AnalysisConceptsSurgical NECCirculation of infantsDistinct neutrophil phenotypesSevere gastrointestinal complicationsAreas of inflammationSites of inflammationMonocyte trafficGastrointestinal complicationsPremature infantsNeutrophil phenotypeSevere inflammationInflammatory genesPotential biomarkersSingle-cell RNA sequencingOxygen species generationInflammationNovel subtypeBlood vesselsMass cytometryNECEnterocolitisMucosaInfantsMϕsSpecies generationGestational Age-Specific Complete Blood Count Signatures in Necrotizing Enterocolitis
Pantalone JM, Liu S, Olaloye OO, Prochaska EC, Yanowitz T, Riley MM, Buland JR, Brozanski BS, Good M, Konnikova L. Gestational Age-Specific Complete Blood Count Signatures in Necrotizing Enterocolitis. Frontiers In Pediatrics 2021, 9: 604899. PMID: 33718296, PMCID: PMC7952609, DOI: 10.3389/fped.2021.604899.Peer-Reviewed Original ResearchComplete blood countNecrotizing enterocolitisGestational ageAntibiotic completionNEC onsetNeonatal intensive care unitMedical necrotizing enterocolitisIntensive care unitSurgical necrotizing enterocolitisLeukocyte patternImmune abnormalitiesNEC casesCare unitIllness onsetBlood countSingle institutionAcute dropCell abnormalitiesPercent changeCBC valuesInfantsWeeksDiagnosisEnterocolitisMonocytes
2020
Role of Nutrition in Prevention of Neonatal Spontaneous Intestinal Perforation and Its Complications: A Systematic Review
Olaloye O, Swatski M, Konnikova L. Role of Nutrition in Prevention of Neonatal Spontaneous Intestinal Perforation and Its Complications: A Systematic Review. Nutrients 2020, 12: 1347. PMID: 32397283, PMCID: PMC7284579, DOI: 10.3390/nu12051347.Peer-Reviewed Original ResearchMeSH KeywordsEatingEnteral NutritionFeeding MethodsFemaleHumansInfant, Extremely Low Birth WeightInfant, NewbornIntestinal PerforationLength of StayMaleNeurodevelopmental DisordersNutritional Physiological PhenomenaParenteral NutritionPostoperative CarePostoperative ComplicationsSpontaneous PerforationTime FactorsConceptsSpontaneous intestinal perforationIncidence of SIPRole of nutritionEnteral nutritionIntestinal perforationFeeding practicesSystematic reviewEarly enteral nutritionFull enteral feedsPost-operative nutritionLow birthweight infantsLength of stayHistorical control studySearch of PubMedDays of lifeMeta-Analyses (PRISMA) guidelinesPreferred Reporting ItemsRelevant search termsELBW infantsNutrition initiationCohort studyDevastating complicationParenteral nutritionSecondary outcomesEnteral feeds
2019
Maturation of the Human Intestinal Immune System Occurs Early in Fetal Development
Stras SF, Werner L, Toothaker JM, Olaloye OO, Oldham AL, McCourt CC, Lee YN, Rechavi E, Shouval DS, Konnikova L. Maturation of the Human Intestinal Immune System Occurs Early in Fetal Development. Developmental Cell 2019, 51: 357-373.e5. PMID: 31607651, DOI: 10.1016/j.devcel.2019.09.008.Peer-Reviewed Original ResearchMeSH KeywordsB-LymphocytesCell ProliferationClone CellsCytokinesFemaleFetal DevelopmentFetusHumansImmune SystemImmunity, MucosalImmunologic MemoryImmunophenotypingInfant, NewbornIntestinesPregnancyPregnancy Trimester, SecondReceptors, Antigen, B-CellReceptors, Antigen, T-CellT-LymphocytesV(D)J RecombinationConceptsInnate lymphoid cellsGestational ageIntestinal immunityDendritic cellsB cellsHuman intestinal immune systemAdaptive immune landscapeIntestinal immune systemNatural killer cellsWeeks gestational ageTransitional B cellsB cell maturityT cell receptorComplex innateImmune atlasEarly life developmentImmune landscapeKiller cellsTCR repertoireLymphoid cellsFetal developmentImmune systemInnate immunityCell receptorMass cytometryCase 4: Large-Volume Hematemesis in a 16-year-old Boy
Dasgupta S, Olaloye O, Pierce M, Glaser A. Case 4: Large-Volume Hematemesis in a 16-year-old Boy. Pediatrics In Review 2019, 40: 538-542. PMID: 31575807, DOI: 10.1542/pir.2017-0065.Peer-Reviewed Original Research
News
News
- November 21, 2024
Prematurity Awareness Month: Researching the Pre-term Immune System
- February 28, 2024
Find Yale Pediatrics at the 2024 Pediatric Academic Societies (PAS) Meeting
- June 06, 2023
New Research at Yale Points to Better Understanding of Treatment Targets for Necrotizing enterocolitis (NEC) in Premature Babies
- April 06, 2023
Yale Pediatrics Poster Presenters at PAS 2023