2024
In vivo neuropil density from anatomical MRI and machine learning
Akif A, Staib L, Herman P, Rothman D, Yu Y, Hyder F. In vivo neuropil density from anatomical MRI and machine learning. Cerebral Cortex 2024, 34: bhae200. PMID: 38771239, PMCID: PMC11107380, DOI: 10.1093/cercor/bhae200.Peer-Reviewed Original ResearchConceptsMagnetic resonance imagingSynaptic densityNeuropil densityCellular densityArtificial neural networkNeural networkPositron emission tomographyAnatomical magnetic resonance imagingHealthy subjectsSynaptic activityMRI scansMachine learning algorithmsBrain's energy budgetEmission tomographyIn vivo MRI scansResonance imagingTissue cellularityLearning algorithmsDiffusion magnetic resonance imagingMachine learningMicroscopic interpretationInterpretation of functional neuroimaging dataIndividual predictionsSubjects
2023
A multi-laboratory preclinical trial in rodents to assess treatment candidates for acute ischemic stroke
Lyden P, Diniz M, Bosetti F, Lamb J, Nagarkatti K, Rogatko A, Kim S, Cabeen R, Koenig J, Akhter K, Arbab A, Avery B, Beatty H, Bibic A, Cao S, Simoes Braga Boisserand L, Chamorro A, Chauhan A, Diaz-Perez S, Dhandapani K, Dhanesha N, Goh A, Herman A, Hyder F, Imai T, Johnson C, Khan M, Kamat P, Karuppagounder S, Kumskova M, Mihailovic J, Mandeville J, Morais A, Patel R, Sanganahalli B, Smith C, Shi Y, Sutariya B, Thedens D, Qin T, Velazquez S, Aronowski J, Ayata C, Chauhan A, Leira E, Hess D, Koehler R, McCullough L, Sansing L. A multi-laboratory preclinical trial in rodents to assess treatment candidates for acute ischemic stroke. Science Translational Medicine 2023, 15: eadg8656. PMID: 37729432, DOI: 10.1126/scitranslmed.adg8656.Peer-Reviewed Original ResearchConceptsPreclinical assessmentFocal cerebral ischemic insultAcute ischemic strokeCerebral ischemic insultLarge clinical trialsDiet-induced obesityNew clinical interventionsIntravascular thrombectomyIschemic strokeStroke treatmentHypertensive ratsIschemic insultBlinded assessmentClinical trialsYoung miceTreatment candidatesExclusion criteriaAnimal modelsYoung ratsFutile interventionsPreclinical trialsClinical interventionsFutility boundariesMiceDisease areas
2020
Hemodynamic impairments within individual watershed areas in asymptomatic carotid artery stenosis by multimodal MRI
Kaczmarz S, Göttler J, Petr J, Hansen M, Mouridsen K, Zimmer C, Hyder F, Preibisch C. Hemodynamic impairments within individual watershed areas in asymptomatic carotid artery stenosis by multimodal MRI. Cerebrovascular And Brain Metabolism Reviews 2020, 41: 380-396. PMID: 32237952, PMCID: PMC7812517, DOI: 10.1177/0271678x20912364.Peer-Reviewed Original ResearchConceptsInternal carotid artery stenosisRelative oxygen extraction fractionRelative cerebral blood volumeCerebral blood flowCapillary transit time heterogeneityOxygen extraction capacityCarotid artery stenosisHemodynamic impairmentCerebrovascular reactivityArtery stenosisUnilateral internal carotid artery stenosisAsymptomatic internal carotid artery stenosisAsymptomatic carotid artery stenosisAge-matched healthy controlsMultimodal MRICerebral blood volumeOxygen extraction fractionTransit time heterogeneityMicrovascular impairmentStroke riskOxygenation parametersWidespread dysfunctionHealthy controlsHemodynamic parametersIndividual patients
2016
Metabolic demands of neural-hemodynamic associated and disassociated areas in brain
Sanganahalli BG, Herman P, Rothman DL, Blumenfeld H, Hyder F. Metabolic demands of neural-hemodynamic associated and disassociated areas in brain. Cerebrovascular And Brain Metabolism Reviews 2016, 36: 1695-1707. PMID: 27562867, PMCID: PMC5076793, DOI: 10.1177/0271678x16664531.Peer-Reviewed Original ResearchConceptsVentral posterolateral thalamic nucleusFunctional magnetic resonance imagingMulti-unit activityLocal field potentialsMetabolic demandsPosterolateral thalamic nucleusBlood oxygenation level-dependent (BOLD) responseSensory-evoked responsesCortical local field potentialsThalamic local field potentialsMagnetic resonance imagingLevel-dependent responsesSimilar metabolic demandThalamic nucleiForelimb cortexBlood flowBlood volumeCBV responseResonance imagingLatency differenceHemodynamicsBOLD signalOxidative metabolismDifferent metabolic demandsField potentialsTowards longitudinal mapping of extracellular pH in gliomas
Huang Y, Coman D, Herman P, Rao JU, Maritim S, Hyder F. Towards longitudinal mapping of extracellular pH in gliomas. NMR In Biomedicine 2016, 29: 1364-1372. PMID: 27472471, PMCID: PMC5035200, DOI: 10.1002/nbm.3578.Peer-Reviewed Original ResearchConceptsSurgical interventionPlasma concentrationsU87 brain tumorsPreclinical modelsRenal clearanceSame subjectsTumor assessmentBrain tumorsProbe doseTherapeutic monitoringTranslational valueTumor characterizationLongitudinal scansChemical shift imaging techniqueThulium ionsMolecular imagingParamagnetic probesInterventionScansImaging techniquesSubjectsNon-exchangeable protonsImaging the intratumoral–peritumoral extracellular pH gradient of gliomas
Coman D, Huang Y, Rao JU, De Feyter HM, Rothman DL, Juchem C, Hyder F. Imaging the intratumoral–peritumoral extracellular pH gradient of gliomas. NMR In Biomedicine 2016, 29: 309-319. PMID: 26752688, PMCID: PMC4769673, DOI: 10.1002/nbm.3466.Peer-Reviewed Original ResearchConceptsRG2 tumorsTumor typesKi-67-positive cellsCancer therapeutic responseAcidic pHeTherapeutic responseRat brainPositive cellsSolid tumorsTumor cell invasionTumor borderTumorsPeritumoral regionNormal tissuesCell invasionTumor pHeP-MRSCancer imagingNeutral intracellularImagingPreclinical applicationsInfusionTherapy
2014
Caloric Restriction Impedes Age-Related Decline of Mitochondrial Function and Neuronal Activity
Lin AL, Coman D, Jiang L, Rothman DL, Hyder F. Caloric Restriction Impedes Age-Related Decline of Mitochondrial Function and Neuronal Activity. Cerebrovascular And Brain Metabolism Reviews 2014, 34: 1440-1443. PMID: 24984898, PMCID: PMC4158670, DOI: 10.1038/jcbfm.2014.114.Peer-Reviewed Original ResearchConceptsOld CR ratsNeuronal activityYoung controlsCR ratsCaloric restriction (CR) prolongs lifespanHealthy agingNeuronal glucose oxidationBrain mitochondrial functionNeuronal energy productionMitochondrial functionAge-related declineNeurotransmitter cyclingOlder controlsNeurotransmission ratesBrain physiologyRatsGlucose oxidationProlong lifespanVivo nuclear magnetic resonance (NMR) spectroscopyMagnetic resonance spectroscopyDetrimental effectsAgingControl
2013
Intranasal epidermal growth factor treatment rescues neonatal brain injury
Scafidi J, Hammond TR, Scafidi S, Ritter J, Jablonska B, Roncal M, Szigeti-Buck K, Coman D, Huang Y, McCarter RJ, Hyder F, Horvath TL, Gallo V. Intranasal epidermal growth factor treatment rescues neonatal brain injury. Nature 2013, 506: 230-234. PMID: 24390343, PMCID: PMC4106485, DOI: 10.1038/nature12880.Peer-Reviewed Original ResearchMeSH KeywordsAdministration, IntranasalAnimalsAnimals, NewbornBrain InjuriesCell DifferentiationCell DivisionCell LineageCell SurvivalDemyelinating DiseasesDisease Models, AnimalEpidermal Growth FactorErbB ReceptorsHumansHypoxiaInfant, Premature, DiseasesMaleMiceMolecular Targeted TherapyOligodendrogliaRegenerationSignal TransductionStem CellsTime FactorsConceptsDiffuse white matter injuryNeonatal brain injuryVery preterm infantsWhite matter injuryOligodendrocyte precursor cellsEpidermal growth factor receptorGrowth factor treatmentGrowth factor receptorPreterm infantsFunctional recoveryBrain injurySuch injuriesEpidermal growth factor treatmentMouse modelFactor treatmentInjuryFactor receptorPrecursor cellsInfantsReceptorsAnti-epileptogenesis: Electrophysiology, diffusion tensor imaging and behavior in a genetic absence model
van Luijtelaar G, Mishra AM, Edelbroek P, Coman D, Frankenmolen N, Schaapsmeerders P, Covolato G, Danielson N, Niermann H, Janeczko K, Kiemeneij A, Burinov J, Bashyal C, Coquillette M, Lüttjohann A, Hyder F, Blumenfeld H, van Rijn CM. Anti-epileptogenesis: Electrophysiology, diffusion tensor imaging and behavior in a genetic absence model. Neurobiology Of Disease 2013, 60: 126-138. PMID: 23978468, PMCID: PMC3952020, DOI: 10.1016/j.nbd.2013.08.013.Peer-Reviewed Original ResearchConceptsDays post treatmentWAG/Rij ratsCritical treatment periodDuration of ADDepressive-like behaviorDepressive-like symptomsEarly pharmacological treatmentPost treatmentTreatment of patientsWhite matter changesGenetic absence modelCortical network activityDiffusion tensor imagingChronic epilepsySymptom onsetInternal capsulaCortical excitabilityPharmacological treatmentDecreased immobilitySwim testControl ratsTreatment periodCorpus callosumMatter changesPotential amplitudeFunctional MRI and neural responses in a rat model of Alzheimer's disease
Sanganahalli BG, Herman P, Behar KL, Blumenfeld H, Rothman DL, Hyder F. Functional MRI and neural responses in a rat model of Alzheimer's disease. NeuroImage 2013, 79: 404-411. PMID: 23648961, PMCID: PMC3700380, DOI: 10.1016/j.neuroimage.2013.04.099.Peer-Reviewed Original ResearchConceptsAlzheimer's diseaseFunctional magnetic resonance imagingCerebral cortexAD brainSomatosensory cortexRat modelCortical functionNeural responsesAge-matched healthy controlsAD rat modelContralateral somatosensory cortexSensory-evoked responsesHigh-field functional magnetic resonance imagingBrain functional responsesMagnetic resonance imagingAD ratsControl ratsHealthy controlsThalamic responsesNormal ratsCortical responsesAD modelSubcortical functionBrain plaquesElectrical stimulationMitochondrial Functional State Impacts Spontaneous Neocortical Activity and Resting State fMRI
Sanganahalli BG, Herman P, Hyder F, Kannurpatti SS. Mitochondrial Functional State Impacts Spontaneous Neocortical Activity and Resting State fMRI. PLOS ONE 2013, 8: e63317. PMID: 23650561, PMCID: PMC3641133, DOI: 10.1371/journal.pone.0063317.Peer-Reviewed Original ResearchConceptsSpontaneous neuronal activityNeuronal activityCerebral blood flow fluctuationsFunctional connectivityRelevant translational modelState functional connectivityTraumatic brain injuryBlood flow fluctuationsIntrinsic brain activityBrain functional connectivityResting-state fMRIMitochondrial functional stateNeuronal electrical activityFunctional stateReduced RSFCNeural metabolismBrain injuryHemodynamic fluctuationsHemodynamic responseMCU inhibitionNeocortical activityBOLD fluctuationsTranslational modelState fMRIBOLD responseMitochondrial Calcium Uptake Capacity Modulates Neocortical Excitability
Sanganahalli BG, Herman P, Hyder F, Kannurpatti SS. Mitochondrial Calcium Uptake Capacity Modulates Neocortical Excitability. Cerebrovascular And Brain Metabolism Reviews 2013, 33: 1115-1126. PMID: 23591650, PMCID: PMC3705442, DOI: 10.1038/jcbfm.2013.61.Peer-Reviewed Original ResearchConceptsSensory-evoked cortical activityCentral nervous system metabolismCerebral blood flowCortical neuronal activityStimulus-evoked responsesCentral nervous systemBlood oxygen level dependenceNeocortical excitabilityBrain signalingHemodynamic responseBlood flowNeuronal activityNervous systemCortical activityNeocortical activityCalcium changesExtracellular electrophysiologyMCU activityMCU inhibitorVivo impactVivo mitochondriaDependent mannerMultiple subcellular compartmentsRole of mitochondriaUniporter activityLactate preserves neuronal metabolism and function following antecedent recurrent hypoglycemia
Herzog RI, Jiang L, Herman P, Zhao C, Sanganahalli BG, Mason GF, Hyder F, Rothman DL, Sherwin RS, Behar KL. Lactate preserves neuronal metabolism and function following antecedent recurrent hypoglycemia. Journal Of Clinical Investigation 2013, 123: 1988-1998. PMID: 23543056, PMCID: PMC3638906, DOI: 10.1172/jci65105.Peer-Reviewed Original ResearchConceptsAntecedent recurrent hypoglycemiaRecurrent hypoglycemiaHypoglycemic conditionsIntensive insulin therapyTight glycemic controlType 2 diabetesInsulin therapyGlycemic controlBrain metabolismElevated lactateNeuronal metabolismRodent modelsNeuronal activityGlucose metabolismHypoglycemiaLactate uptakeNeuronal functionType 1Metabolic regulatorOxidative capacityModest incrementLactateMetabolismUnexpected findingBrainGlutamatergic Function in the Resting Awake Human Brain is Supported by Uniformly High Oxidative Energy
Hyder F, Fulbright RK, Shulman RG, Rothman DL. Glutamatergic Function in the Resting Awake Human Brain is Supported by Uniformly High Oxidative Energy. Cerebrovascular And Brain Metabolism Reviews 2013, 33: 339-347. PMID: 23299240, PMCID: PMC3587823, DOI: 10.1038/jcbfm.2012.207.Peer-Reviewed Original ResearchConceptsFunctional magnetic resonance imagingMagnetic resonance spectroscopy studyAwake resting stateFuture clinical investigationsMagnetic resonance imagingHigh resting activityAwake human brainGray matter regionsGlutamatergic functionGlutamatergic signalingMetabolic measuresClinical investigationAwake stateResting activityVisual cortexGlucose utilizationResonance imaging
2012
Neural Progenitor Cells Regulate Capillary Blood Flow in the Postnatal Subventricular Zone
Lacar B, Herman P, Platel JC, Kubera C, Hyder F, Bordey A. Neural Progenitor Cells Regulate Capillary Blood Flow in the Postnatal Subventricular Zone. Journal Of Neuroscience 2012, 32: 16435-16448. PMID: 23152626, PMCID: PMC3520061, DOI: 10.1523/jneurosci.1457-12.2012.Peer-Reviewed Original ResearchMeSH KeywordsAdenosine TriphosphateAnimalsAnimals, NewbornAstrocytesCalcium SignalingCapillariesCerebral VentriclesCerebrovascular CirculationElectric StimulationElectroporationFemaleFluorescent Antibody TechniqueImage Processing, Computer-AssistedLaser-Doppler FlowmetryMaleMiceMuscle TonusMuscle, Smooth, VascularNeural Stem CellsPericytesVasoconstrictionVasodilationConceptsNeural progenitor cellsSubventricular zoneB cellsBlood flowSVZ cellsPurinergic receptorsPostnatal subventricular zoneVascular responsesCapillary constrictionTransgenic miceElectrical stimulationCalcium increaseBlood flow increasesLaser Doppler flowmetryCapillary blood flowAstrocyte-like cellsReceptor agonist UTPNeonatal electroporationNeurometabolic couplingIntraventricular injectionVasodilating factorsAcute slicesYoung miceDoppler flowmetryHemodynamic responseAnalysis of Time and Space Invariance of BOLD Responses in the Rat Visual System
Bailey CJ, Sanganahalli BG, Herman P, Blumenfeld H, Gjedde A, Hyder F. Analysis of Time and Space Invariance of BOLD Responses in the Rat Visual System. Cerebral Cortex 2012, 23: 210-222. PMID: 22298731, PMCID: PMC3513959, DOI: 10.1093/cercor/bhs008.Peer-Reviewed Original ResearchConceptsFunctional magnetic resonance imagingGeneral linear modelingSuperior colliculusBOLD responseBasal blood flowNeural activityRat visual systemBlood oxygenation level-dependent (BOLD) responsePrimary visual cortexMagnetic resonance imagingLevel-dependent responsesNeurovascular couplingRat brainBlood flowVisual cortexResonance imagingStimulation paradigmV1 signalsLight flashesOnset/Neural signalsResponseV1Visual systemColliculus
2011
Fractal analysis of spontaneous fluctuations of the BOLD signal in rat brain
Herman P, Sanganahalli BG, Hyder F, Eke A. Fractal analysis of spontaneous fluctuations of the BOLD signal in rat brain. NeuroImage 2011, 58: 1060-1069. PMID: 21777682, PMCID: PMC3705180, DOI: 10.1016/j.neuroimage.2011.06.082.Peer-Reviewed Original Research
2009
Cerebral oxygen demand for short‐lived and steady‐state events
Herman P, Sanganahalli BG, Blumenfeld H, Hyder F. Cerebral oxygen demand for short‐lived and steady‐state events. Journal Of Neurochemistry 2009, 109: 73-79. PMID: 19393011, PMCID: PMC2714475, DOI: 10.1111/j.1471-4159.2009.05844.x.Peer-Reviewed Original ResearchOxidative Neuroenergetics in Event-Related Paradigms
Sanganahalli BG, Herman P, Blumenfeld H, Hyder F. Oxidative Neuroenergetics in Event-Related Paradigms. Journal Of Neuroscience 2009, 29: 1707-1718. PMID: 19211878, PMCID: PMC2760964, DOI: 10.1523/jneurosci.5549-08.2009.Peer-Reviewed Original Research
2001
Quantitative functional imaging of the brain: towards mapping neuronal activity by BOLD fMRI
Hyder F, Kida I, Behar K, Kennan R, Maciejewski P, Rothman D. Quantitative functional imaging of the brain: towards mapping neuronal activity by BOLD fMRI. NMR In Biomedicine 2001, 14: 413-431. PMID: 11746934, DOI: 10.1002/nbm.733.Peer-Reviewed Original ResearchConceptsMagnetic resonance imagingNeuronal activityBOLD functional MRIFunctional MRICerebral cortexPharmacological treatmentGlutamate release inhibitorNeuronal glucose oxidationRat cerebral cortexRelease of glutamateRat forepaw stimulation modelFMRI signalsFunctional magnetic resonance imagingQuantitative magnetic resonance imagingBlood oxygenation levelBOLD fMRI studiesEnergy metabolismBOLD fMRI signalMulti-modal magnetic resonance imagingGlutamatergic neuronsRelease inhibitorChannel blockersRat brainOxygen deliveryNeurochemical basis