Jonathan Howard DeLong, PhD
Associate Research ScientistAbout
Research
Publications
2025
Fingolimod as a Potential Cerebroprotectant Results From the Stroke Preclinical Assessment Network.
Boisserand L, Herman A, Sanganahalli B, Mihailovic J, Beatty H, Johnson C, Diaz S, DeLong J, Velazquez S, Grutzendler J, Dela Cruz C, Zhou J, Sheth K, Matouk C, Zhan S, Morais A, Imai T, Chauhan A, Patel R, Kumskova M, Shi Y, Avery B, Lamb J, Nagarkatti K, Khan M, Kamat P, Dhandapani K, McCullough L, Aronowski J, Hess D, Koehler R, Lyden P, Leira E, Chauhan A, Ayata C, Chen M, Diniz M, Hyder F, Sansing L. Fingolimod as a Potential Cerebroprotectant Results From the Stroke Preclinical Assessment Network. Stroke 2025 PMID: 40899256, DOI: 10.1161/strokeaha.125.050903.Peer-Reviewed Original ResearchSphingosine-1-phosphate receptorsComorbidity modelFunctional outcomesLesion sizeDay 7Therapeutic potentialEffects of fingolimodSecondary lymphoid organsYoung healthy miceClinically relevant modelMiddle cerebral artery occlusionPrimary functional outcomeBrain morphometrySpontaneously Hypertensive RatsCerebral artery occlusionCorner testSphingosine-1-PhosphateMagnetic resonance imagingHigh-fat dietFoot-fault testFingolimod effectsImmunomodulatory drugsLess atrophyHealthy miceFingolimodCharacterizing Stroke Clots Using Single‐Cell Sequencing
Renedo D, Barak T, DeLong J, Acosta J, Sujijantarat N, Koo A, Rivier C, Clocchiatti-Tuozzo S, Huo S, Antonios J, Giles J, Falcone G, Sheth K, Hebert R, Gunel M, Sansing L, Navaratnam D, Matouk C. Characterizing Stroke Clots Using Single‐Cell Sequencing. Journal Of The American Heart Association 2025, 14: ejaha/2025/041738-t. PMID: 40878981, PMCID: PMC12553457, DOI: 10.1161/jaha.125.041738.Peer-Reviewed Original ResearchConceptsMulti-marker analysisGene expressionMulti-marker Analysis of GenoMic AnnotationCell type-specific gene expressionT cellsGenome-wide association studiesGene expression of cellsSingle-cell RNA sequencingPotential biomarkersTIMP1Genes associated with atherosclerosisHLA-DRB1*01Single-cell sequencingExpression of genesUpregulated expression of genesGene expression profilesCarotid atherosclerosisGenome annotationCD8 T cellsUpregulated expressionImmune cell compositionAssociation studiesNatural killer cellsImmune cell populationsLarge vessel occlusion stroke
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 populations
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