2024
Macro- and microvascular contributions to cerebral structural alterations in patients with asymptomatic carotid artery stenosis
Schmitzer L, Kaczmarz S, Göttler J, Hoffmann G, Kallmayer M, Eckstein H, Hedderich D, Kufer J, Zimmer C, Preibisch C, Hyder F, Sollmann N. Macro- and microvascular contributions to cerebral structural alterations in patients with asymptomatic carotid artery stenosis. Cerebrovascular And Brain Metabolism Reviews 2024, 44: 1629-1642. PMID: 38506325, PMCID: PMC11418673, DOI: 10.1177/0271678x241238935.Peer-Reviewed Original ResearchInternal carotid artery stenosisInternal carotid artery stenosis patientsCerebral blood flowCarotid artery stenosisPeak width of skeletonized mean diffusivitySmall vessel diseaseContralateral alterationsArtery stenosisAsymptomatic internal carotid artery stenosisWhite matterAsymptomatic carotid artery stenosisCapillary transit time heterogeneityCerebral structural alterationsCortical thicknessMagnetic resonance imagingHemodynamic alterationsRisk factorsPatientsDTI metricsResonance imagingDorsal cingulate cortexBlood flowIschemic strokeMean diffusivityStenosis
2023
Neurovascular coupling is optimized to compensate for the increase in proton production from nonoxidative glycolysis and glycogenolysis during brain activation and maintain homeostasis of pH, pCO2, and pO2
DiNuzzo M, Dienel G, Behar K, Petroff O, Benveniste H, Hyder F, Giove F, Michaeli S, Mangia S, Herculano‐Houzel S, Rothman D. Neurovascular coupling is optimized to compensate for the increase in proton production from nonoxidative glycolysis and glycogenolysis during brain activation and maintain homeostasis of pH, pCO2, and pO2. Journal Of Neurochemistry 2023, 168: 632-662. PMID: 37150946, PMCID: PMC10628336, DOI: 10.1111/jnc.15839.Peer-Reviewed Original ResearchHigher cerebral blood flowCerebral blood flowOxygen extraction fractionNeurovascular couplingBlood flowLower oxygen extraction fractionNonoxidative glycolysisCerebral metabolic rateBrain pHCapillary densityNeurovascular diseasesNonoxidative metabolismTissue oxygenationHuman cortexBrain functionExtraction fractionBrain activationMitochondrial ATP productionPET measurementsCMROOxygen consumptionHomeostasisGlycogenolysisFMRI contrastActivationEmbracing Heterogeneity in The Multicenter Stroke Preclinical Assessment Network (SPAN) Trial
Morais A, Locascio J, Sansing L, Lamb J, Nagarkatti K, Imai T, van Leyen K, Aronowski J, Koenig J, Bosetti F, Lyden P, Ayata C, Bosetti F, Koenig J, Lyden P, Lamb J, Nagarkatti K, Hess D, Kamat P, Khan M, Dhandapani K, Arbab A, Siddiqui S, Smith C, Nisar M, Leira E, Chauhan A, Dhanesha N, Patel R, Kumskova M, Thedens D, Wang K, Ayata C, Morais A, Imai T, Qin T, Jin X, Erdogan T, Yu L, Mandeville J, Kimberly W, Whittier J, Lo E, Arai K, Van Leyen K, Sansing L, Hyder F, Mihailovic J, Sanganahalli B, Diaz-Perez S, Velazquez S, Beatty H, Johnson C, Herman A, Boisserand L, Immakavar E, Koehler R, Dawson T, Dawson V, Shi Y, Avery B, Lannon S, Bibic A, Akhter K, Karuppagounder S, Aronowski J, McCullough L, Obertas L, Goh A, Huang S, Chauhan A. Embracing Heterogeneity in The Multicenter Stroke Preclinical Assessment Network (SPAN) Trial. Stroke 2023, 54: 620-631. PMID: 36601951, PMCID: PMC9870939, DOI: 10.1161/strokeaha.122.040638.Peer-Reviewed Original ResearchConceptsTotal anesthesia durationAnesthesia durationIndependent predictorsMultivariable analysisClinical trialsTransient focal cerebral ischemiaFocal cerebral ischemiaCerebral blood flowLaser Doppler flowCentralized randomizationModified intentionTreat populationExperimental strokeCerebral ischemiaDoppler flowRodent modelsMCAOBlood flowNetwork trialFlow dropPreclinical trialsMouse cohortsStudy designTrialsTrial onset
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
2014
Physiological Basis of BOLD fMRI Decreases
Kim R, Hyder F, Blumenfeld H. Physiological Basis of BOLD fMRI Decreases. Neuromethods 2014, 88: 221-236. DOI: 10.1007/978-1-4939-0724-3_11.Peer-Reviewed Original ResearchCerebral blood flowCerebral blood volumeFMRI decreasesNeuronal activityLocal field potentialsNeuronal firingMagnetic resonance imaging (MRI) signal changesFunctional magnetic resonance imaging (fMRI) signal changesSpike-wave seizuresCortical slow oscillationsFMRI signal changesBOLD fMRI signalHippocampal seizuresSignal changesBasal gangliaDirect electrophysiological measurementsFMRI changesPhysiological basisSomatosensory stimulationBlood flowParadoxical decreaseAnimal modelsBlood volumeAnimal studiesCombined neuroimaging
2013
Mitochondrial 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 activity
2011
Where fMRI and Electrophysiology Agree to Disagree: Corticothalamic and Striatal Activity Patterns in the WAG/Rij Rat
Mishra AM, Ellens DJ, Schridde U, Motelow JE, Purcaro MJ, DeSalvo MN, Enev M, Sanganahalli BG, Hyder F, Blumenfeld H. Where fMRI and Electrophysiology Agree to Disagree: Corticothalamic and Striatal Activity Patterns in the WAG/Rij Rat. Journal Of Neuroscience 2011, 31: 15053-15064. PMID: 22016539, PMCID: PMC3432284, DOI: 10.1523/jneurosci.0101-11.2011.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsBrainBrain MappingBrain WavesCerebral CortexCerebrovascular CirculationCorpus StriatumDisease Models, AnimalElectroencephalographyElectrophysiologyEpilepsyImage Processing, Computer-AssistedLaser-Doppler FlowmetryMagnetic Resonance ImagingNicotinic AntagonistsOxygenRatsRats, WistarThalamusTubocurarineVibrissaeConceptsCerebral blood flowCerebral blood volumeLocal field potentialsNeuronal activityLaser Doppler cerebral blood flowSubcortical structuresWAG/Rij ratsNeuronal activity decreasesHuman absence epilepsySpike-wave dischargesWAG/RijMultiunit activity recordingsFMRI signalsFunctional magnetic resonance imaging (fMRI) signalsMagnetic resonance imaging signalsFMRI decreasesCBF decreaseHemodynamic changesCerebral cortexBasal gangliaSomatosensory cortexAbsence epilepsyWhisker stimulationBlood flowAnimal models
2005
High resolution measurements of neuronal activity, cerebral blood flow, and fMRI during spike-wave seizures in WAG/Rij rats
Blumenfeld H, Nersesyan H, Khubchandani M, Schridde U, Berman R, Rothman D, Hyder F. High resolution measurements of neuronal activity, cerebral blood flow, and fMRI during spike-wave seizures in WAG/Rij rats. Cerebrovascular And Brain Metabolism Reviews 2005, 25: s409-s409. DOI: 10.1038/sj.jcbfm.9591524.0409.Peer-Reviewed Original Research
2001
Cerebral energetics and the glycogen shunt: Neurochemical basis of functional imaging
Shulman R, Hyder F, Rothman D. Cerebral energetics and the glycogen shunt: Neurochemical basis of functional imaging. Proceedings Of The National Academy Of Sciences Of The United States Of America 2001, 98: 6417-6422. PMID: 11344262, PMCID: PMC33483, DOI: 10.1073/pnas.101129298.Peer-Reviewed Original ResearchConceptsLactate concentrationBrain activationBrain lactate concentrationCerebral blood flowAdult mammalian brainBasal glucose oxidationPositron emission tomographyGlucose oxidationGlucose indexCerebral energeticsFunctional imaging dataNeurophysiological valuesBlood flowGlucose metabolismNeurotransmitter clearanceNeurochemical basisLactate effluxMammalian brainBasal physiological conditionsNeurotransmitter releaseAnaerobic glucose metabolismFunctional imagingComplete dataBrain activityMetabolic consumption rate
1999
Regulation of Cerebral Oxygen Delivery
Hyder F, Shulman R, Rothman D. Regulation of Cerebral Oxygen Delivery. Advances In Experimental Medicine And Biology 1999, 471: 99-110. PMID: 10659136, DOI: 10.1007/978-1-4615-4717-4_12.Peer-Reviewed Original ResearchConceptsCerebral blood flow