Jonathan Howard DeLong, PhD
Associate Research ScientistAbout
Research
Publications
2023
Role of Inflammatory Processes in Hemorrhagic Stroke
Ohashi S, DeLong J, Kozberg M, Mazur-Hart D, van Veluw S, Alkayed N, Sansing L. Role of Inflammatory Processes in Hemorrhagic Stroke. Stroke 2023, 54: 605-619. PMID: 36601948, DOI: 10.1161/strokeaha.122.037155.Peer-Reviewed Reviews, Practice Guidelines, Standards, and Consensus StatementsConceptsHemorrhagic strokeIntracerebral hemorrhageInflammatory processCerebral amyloid angiopathy-related haemorrhageAngiopathy-related hemorrhageRole of inflammationCerebral amyloid angiopathyInflammatory immune responseEffective therapeutic strategyCentral nervous systemBrain residentAmyloid angiopathyImmune cellsTissue injuryCommon causeImmune responseHemorrhageTherapeutic strategiesNervous systemMajor subtypesDisease pathologyStrokeOlder individualsTissue recoveryDeadliest form
2022
Inflammatory Responses After Ischemic Stroke
DeLong JH, Ohashi SN, O’Connor K, Sansing LH. Inflammatory Responses After Ischemic Stroke. Seminars In Immunopathology 2022, 44: 625-648. PMID: 35767089, DOI: 10.1007/s00281-022-00943-7.Peer-Reviewed Reviews, Practice Guidelines, Standards, and Consensus StatementsPD-L1–PD-1 interactions limit effector regulatory T cell populations at homeostasis and during infection
Perry J, Shallberg L, Clark J, Gullicksrud J, DeLong J, Douglas B, Hart A, Lanzar Z, O’Dea K, Konradt C, Park J, Kuchroo J, Grubaugh D, Zaretsky A, Brodsky I, Malefyt R, Christian D, Sharpe A, Hunter C. PD-L1–PD-1 interactions limit effector regulatory T cell populations at homeostasis and during infection. Nature Immunology 2022, 23: 743-756. PMID: 35437326, PMCID: PMC9106844, DOI: 10.1038/s41590-022-01170-w.Peer-Reviewed Original ResearchConceptsPD-1ETreg cellsPD-L1Interleukin-10T cellsCell expressionInhibitory receptor PD-1Regulatory T cell populationDevelopment of immunopathologyTreg cell populationRegulatory T cellsEffector T cellsPD-1 interactionReceptor PD-1T cell populationsCell populationsMyeloid cell expressionT cell receptor activationLineage-specific deletionTreg cellsEffector phenotypeInfected miceCell receptor activationInflammatory processEarly interferon
2021
Divergent Functions of Tissue-Resident and Blood-Derived Macrophages in the Hemorrhagic Brain
Chang CF, Goods BA, Askenase MH, Beatty HE, Osherov A, DeLong JH, Hammond MD, Massey J, Landreneau M, Love JC, Sansing LH. Divergent Functions of Tissue-Resident and Blood-Derived Macrophages in the Hemorrhagic Brain. Stroke 2021, 52: 1798-1808. PMID: 33840225, PMCID: PMC8085165, DOI: 10.1161/strokeaha.120.032196.Peer-Reviewed Original ResearchConceptsMonocyte-derived macrophagesIntracerebral hemorrhageT cell proliferationCore transcriptional programDifferential gene expressionDistinct transcriptional signaturesBone marrow-derived macrophagesAntigen-specific T cell proliferationTranscriptional programsCD4 T cell proliferationLongitudinal transcriptomic analysisVivo phagocytosis assaysTranscriptomic analysisDivergent functionsMarrow-derived macrophagesMHCII genesTissue-resident microgliaAntigen-presenting capabilityAutologous blood injectionGene expressionPrimary microglia culturesInnate immune cellsPhagocytosis of debrisTranscriptional signatureBlood-derived macrophagesLeukocyte dynamics after intracerebral hemorrhage in a living patient reveal rapid adaptations to tissue milieu
Goods BA, Askenase MH, Markarian E, Beatty HE, Drake RS, Fleming I, DeLong JH, Philip NH, Matouk CC, Awad IA, Zuccarello M, Hanley DF, Love JC, Shalek AK, Sansing LH, Investigators T. Leukocyte dynamics after intracerebral hemorrhage in a living patient reveal rapid adaptations to tissue milieu. JCI Insight 2021, 6: e145857. PMID: 33749664, PMCID: PMC8026179, DOI: 10.1172/jci.insight.145857.Peer-Reviewed Original ResearchConceptsIntracerebral hemorrhageAcute brain injurySystemic immune responsesBrain tissue injuryHigh mortality rateLocal cellular responseAcute injuryTreatment optionsIntracerebral eventsBrain injuryCerebral hematomaLeukocyte responseTissue injuryT cellsImmune responseCT scanMortality rateDevastating formImmune dynamicsTherapeutic interventionsLeukocyte dynamicsBrain tissuePatientsInvasive surgeryInjury
2020
Loss of IL-27Rα Results in Enhanced Tubulointerstitial Fibrosis Associated with Elevated Th17 Responses.
Coppock GM, Aronson LR, Park J, Qiu C, Park J, DeLong JH, Radaelli E, Suszták K, Hunter CA. Loss of IL-27Rα Results in Enhanced Tubulointerstitial Fibrosis Associated with Elevated Th17 Responses. The Journal Of Immunology 2020, 205: 377-386. PMID: 32522836, PMCID: PMC7368461, DOI: 10.4049/jimmunol.1901463.Peer-Reviewed Original ResearchConceptsChronic kidney diseaseUnilateral ureteral obstructionIL-17AIL-27RαIL-27Ureteral obstructionKidney diseaseIL-27 actsImmune cell infiltratesCytokine IL-27Day of surgeryImmune-mediated pathologyTubular epithelial cellsDegree of injuryFibrosis AssociatedKidney injuryTh17 cellsTh17 responsesCell infiltrateSerum levelsInflammatory cascadeRenal fibrosisIL-17RAImmune cellsChemokine mRNA
2019
Impact of Interleukin-27p28 on T and B Cell Responses during Toxoplasmosis
Park J, DeLong JH, Knox JJ, Konradt C, Wojno EDT, Hunter CA. Impact of Interleukin-27p28 on T and B Cell Responses during Toxoplasmosis. Infection And Immunity 2019, 87: 10.1128/iai.00455-19. PMID: 31548322, PMCID: PMC6867838, DOI: 10.1128/iai.00455-19.Peer-Reviewed Original ResearchConceptsIL-27p28IL-27Parasite-specific antibody titersEffector T cell populationsT cell-mediated pathologyCell-mediated pathologyT cell activityReduced parasite burdenT cell populationsB cell responsesCentral nervous systemInterleukin-27Antibody titersMajor inhibitory effectHeterodimeric cytokineParasite replicationImmune serumNervous systemParasite burdenCell responsesCell activityInhibitory effectIntracellular parasitesCell populationsToxoplasmosisPD-1 signaling impacts T cell function during the early phase of infection with Toxoplasma gondii
Perry J, Delong J, Clark J, Park J, Gullicksrud J, Shallberg L, Konradt C, Christian D, Hunter C. PD-1 signaling impacts T cell function during the early phase of infection with Toxoplasma gondii. The Journal Of Immunology 2019, 202: 122.5-122.5. DOI: 10.4049/jimmunol.202.supp.122.5.Peer-Reviewed Original ResearchCD8+ T cellsPD-1 signalingPhase of infectionPD-1T cellsEarly phase of infectionPD-L1Inhibitory receptorsProportion of activated CD8+ T cellsExpression of multiple inhibitory receptorsPolyfunctional CD8+ T cellsCD8+ T cell responsesCD8+ T cell populationsTerminally differentiated T cellsExpression of inhibitory receptorsInfected CD8+ T cellsT cell effector differentiationProduction of IFN-gReduced parasite burdenIncreased immune pathologyMultiple inhibitory receptorsPD-L1 blockadeLigand PD-L1T cell responsesT cell populationsIL-27 and TCR Stimulation Promote T Cell Expression of Multiple Inhibitory Receptors
DeLong JH, O'Hara Hall A, Rausch M, Moodley D, Perry J, Park J, Phan AT, Beiting DP, Kedl RM, Hill JA, Hunter CA. IL-27 and TCR Stimulation Promote T Cell Expression of Multiple Inhibitory Receptors. ImmunoHorizons 2019, 3: 13-25. PMID: 31356173, PMCID: PMC6994206, DOI: 10.4049/immunohorizons.1800083.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsB7-H1 AntigenCD4-Positive T-LymphocytesCD8-Positive T-LymphocytesCostimulatory and Inhibitory T-Cell ReceptorsCTLA-4 AntigenFemaleInterleukinsLymphocyte ActivationMiceMice, Inbred BALB CMice, Inbred C57BLReceptors, Antigen, T-CellReceptors, ImmunologicSpleenToxoplasmaToxoplasmosisTranscriptomeTransfectionConceptsT cell expressionMultiple inhibitory receptorsIL-27Inhibitory receptorsPD-L1LAG-3Cell expressionCTLA-4Effector cell expressionTCR stimulationEffector T cellsIL-27 productionT cell activationTim-3Cell surface moleculesCell-extrinsic factorsT cellsIR expressionCell activationTIGITInfectionTCR signalsSurface moleculesSynergistic inductionVivo overexpression
2018
Cytokine- and TCR-Mediated Regulation of T Cell Expression of Ly6C and Sca-1.
DeLong JH, Hall AO, Konradt C, Coppock GM, Park J, Harms Pritchard G, Hunter CA. Cytokine- and TCR-Mediated Regulation of T Cell Expression of Ly6C and Sca-1. The Journal Of Immunology 2018, 200: 1761-1770. PMID: 29358280, PMCID: PMC5821564, DOI: 10.4049/jimmunol.1701154.Peer-Reviewed Original ResearchConceptsT cell expressionIL-27T cellsEffector cellsSca-1Cell expressionPathogen-specific T cellsMemory precursor effector cellsEndogenous IL-27Identification of CD8Type I IFNMemory stem cellsCytokine-mediated signalsEffector CD4Ly6C expressionSca-1 expressionImmune populationsT-betExpression of Ly6CMemory populationMouse CD4I IFNLy6CIFNMouse splenocytes
Academic Achievements & Community Involvement
Get In Touch
Contacts
Locations
300 George Street
Lab
Ste 353
New Haven, CT 06511