Featured Publications
Astrocytes and microglia play orchestrated roles and respect phagocytic territories during neuronal corpse removal in vivo
Damisah EC, Hill RA, Rai A, Chen F, Rothlin CV, Ghosh S, Grutzendler J. Astrocytes and microglia play orchestrated roles and respect phagocytic territories during neuronal corpse removal in vivo. Science Advances 2020, 6: eaba3239. PMID: 32637606, PMCID: PMC7319765, DOI: 10.1126/sciadv.aba3239.Peer-Reviewed Original ResearchConceptsCorpse removalPrecise spatiotemporal resolutionApoptotic cell removalReceptor tyrosine kinasesGlial cellsOrchestrated rolesTyrosine kinaseApoptotic bodiesCell deathSpecialized roleCoordinated interactionPhagocytic interactionSingle cellsBrain homeostasisCellsCell removalIntravital optical imagingSpatiotemporal resolutionRole of phagocytesSynchronized fashionKinaseMarked delayRoleHomeostasisAstrocytesTargeted two-photon chemical apoptotic ablation of defined cell types in vivo
Hill RA, Damisah EC, Chen F, Kwan AC, Grutzendler J. Targeted two-photon chemical apoptotic ablation of defined cell types in vivo. Nature Communications 2017, 8: 15837. PMID: 28621306, PMCID: PMC5501159, DOI: 10.1038/ncomms15837.Peer-Reviewed Original ResearchConceptsCell deathNucleic acid-binding dyeVivo functional consequencesCell type differencesPattern of apoptosisDose-dependent apoptosisComplex organismsMitochondrial fissionFluorescent proteinUnderstanding of mechanismsCell typesCell clearanceFunctional consequencesIndividual cellsDiverse organsDistinct populationsApoptosisMouse brainZebrafishMajor bottleneckNeural plasticityOrganismsSpeciesProteinApoptotic
2021
Intravital Imaging of Neocortical Heterotopia Reveals Aberrant Axonal Pathfinding and Myelination around Ectopic Neurons
Li AM, Hill RA, Grutzendler J. Intravital Imaging of Neocortical Heterotopia Reveals Aberrant Axonal Pathfinding and Myelination around Ectopic Neurons. Cerebral Cortex 2021, 31: 4340-4356. PMID: 33877363, PMCID: PMC8328209, DOI: 10.1093/cercor/bhab090.Peer-Reviewed Original ResearchConceptsNeuronal clustersEarly postnatal developmentVivo calcium imagingEctopic neuronal clustersAxonal patternNeocortical heterotopiaHeterotopic neuronsCortical heterotopiaHeterotopia formationEctopic neuronsAnimal modelsTractable animal modelPostnatal developmentCalcium imagingBrain regionsInducible modelIntravital imagingNeuronsAxonal pathfindingAberrant patternsHeterotopiaMyelinationAxon guidanceCognitive disabilitiesLive mice
2020
TREM2: Modulator of Lipid Metabolism in Microglia
Damisah EC, Rai A, Grutzendler J. TREM2: Modulator of Lipid Metabolism in Microglia. Neuron 2020, 105: 759-761. PMID: 32135085, DOI: 10.1016/j.neuron.2020.02.008.Peer-Reviewed Original ResearchEmerging technologies to study glial cells
Hirbec H, Déglon N, Foo LC, Goshen I, Grutzendler J, Hangen E, Kreisel T, Linck N, Muffat J, Regio S, Rion S, Escartin C. Emerging technologies to study glial cells. Glia 2020, 68: 1692-1728. PMID: 31958188, DOI: 10.1002/glia.23780.Peer-Reviewed Original ResearchConceptsCell typesChallenging biological questionsGlial cellsSpecific cell typesDifferent glial cell typesGlial cell typesBiological questionsPhysiological functionsPrecursor cellsTight interactionOligodendrocyte precursor cellsCellsExperimental approachRelative contributionBrain functionFull understandingSpecific brain functionsRoleFunctionInteractionDevelopmentTranslation
2013
Perturbed neural activity disrupts cerebral angiogenesis during a postnatal critical period
Whiteus C, Freitas C, Grutzendler J. Perturbed neural activity disrupts cerebral angiogenesis during a postnatal critical period. Nature 2013, 505: 407-411. PMID: 24305053, PMCID: PMC3947100, DOI: 10.1038/nature12821.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsAnimals, NewbornBlood VesselsCapillariesCell ProliferationCerebral CortexCerebrovascular CirculationDendritic SpinesEndothelial CellsFemaleHypoxia, BrainInterneuronsMaleMiceMicrocirculationNeovascularization, PathologicNeovascularization, PhysiologicNeurogliaNeuronsNG-Nitroarginine Methyl EsterNitric OxideNitric Oxide SynthaseOxygenSignal TransductionTime FactorsVibrissae
2010
CX3CR1 in Microglia Regulates Brain Amyloid Deposition through Selective Protofibrillar Amyloid-β Phagocytosis
Liu Z, Condello C, Schain A, Harb R, Grutzendler J. CX3CR1 in Microglia Regulates Brain Amyloid Deposition through Selective Protofibrillar Amyloid-β Phagocytosis. Journal Of Neuroscience 2010, 30: 17091-17101. PMID: 21159979, PMCID: PMC3077120, DOI: 10.1523/jneurosci.4403-10.2010.Peer-Reviewed Original ResearchConceptsCX3CR1-deficient miceAlzheimer's diseaseAmyloid-β PhagocytosisBrain amyloid depositionLower brain levelsGreater phagocytic capacityQuantification of AβHigh proliferative rateAβ phagocytosisActivated microgliaMicroglia activationMicroglia activityAmyloid pathologyAmyloid depositionMicroglia densityBrain levelsPlaque depositionSynaptic damageChemokine receptorsDisease progressionMicrogliaTherapeutic strategiesAmyloid depositsPhagocytic capacityPhagocytic abilityThinned-skull cranial window technique for long-term imaging of the cortex in live mice
Yang G, Pan F, Parkhurst CN, Grutzendler J, Gan WB. Thinned-skull cranial window technique for long-term imaging of the cortex in live mice. Nature Protocols 2010, 5: 201-208. PMID: 20134419, PMCID: PMC4690457, DOI: 10.1038/nprot.2009.222.Peer-Reviewed Original ResearchConceptsTwo-photon laser scanning microscopyHigh optical resolutionThinned-skull cranial windowImportant experimental toolOptical resolutionLiving brainCranial window techniqueLive miceLong-term imagingCranial windowExperimental toolInvasive approachAvoids exposureFunctional changesCortical structuresLongitudinal imagingPathological conditionsCortexBrainLaser scanning microscopyScanning microscopyMiceImagingMicroscopyResolution
2009
Ballistic delivery of dyes for structural and functional studies of the nervous system.
Gan WB, Grutzendler J, Wong RO, Lichtman JW. Ballistic delivery of dyes for structural and functional studies of the nervous system. Cold Spring Harbor Protocols 2009, 2009: pdb.prot5202. PMID: 20147144, PMCID: PMC2916724, DOI: 10.1101/pdb.prot5202.Peer-Reviewed Original Research
2007
Various Dendritic Abnormalities Are Associated with Fibrillar Amyloid Deposits in Alzheimer's Disease
GRUTZENDLER J, HELMIN K, TSAI J, GAN W. Various Dendritic Abnormalities Are Associated with Fibrillar Amyloid Deposits in Alzheimer's Disease. Annals Of The New York Academy Of Sciences 2007, 1097: 30-39. PMID: 17413007, DOI: 10.1196/annals.1379.003.Peer-Reviewed Original ResearchConceptsAmyloid depositsAlzheimer's diseasePSAPP miceFibrillar amyloid depositsAmyloid depositionDendritic abnormalitiesHuman AD tissueFibrillar amyloid depositionHuman AD brainsTransgenic mouse modelHuman postmortem brainDystrophic neuritesSpine lossAD brainAD tissueAmyloid plaquesCommon abnormalityMouse modelPostmortem brainsDendritic spinesNeuronal circuitsVaricosity formationSynaptic structureDiseaseDendritic branches
2004
Fibrillar amyloid deposition leads to local synaptic abnormalities and breakage of neuronal branches
Tsai J, Grutzendler J, Duff K, Gan WB. Fibrillar amyloid deposition leads to local synaptic abnormalities and breakage of neuronal branches. Nature Neuroscience 2004, 7: 1181-1183. PMID: 15475950, DOI: 10.1038/nn1335.Peer-Reviewed Original ResearchConceptsFibrillar amyloid depositionAmyloid depositionAlzheimer's diseaseTransgenic mouse modelImportance of preventionFibrillar amyloid depositsSpine lossNearby axonsNeuronal labelingEarly clearanceLarge varicositiesAmyloid plaquesMouse modelNeuronal circuitryAmyloid depositsTwo-photon imagingNeuronal connectionsSynaptic abnormalitiesNeuronal branchesPermanent disruptionPlaquesDiseaseAtrophyVaricositiesPathogenesisAge‐associated synapse elimination in mouse parasympathetic ganglia
Coggan JS, Grutzendler J, Bishop DL, Cook MR, Gan W, Heym J, Lichtman JW. Age‐associated synapse elimination in mouse parasympathetic ganglia. Developmental Neurobiology 2004, 60: 214-226. PMID: 15266652, DOI: 10.1002/neu.20022.Peer-Reviewed Original ResearchConceptsSynapse eliminationExcitatory postsynaptic potential amplitudeSubmandibular ganglion neuronsPostsynaptic potential amplitudeNumber of synapsesMonths of ageMammalian nervous systemAge-related changesMiniature EPSPsSMG neuronsSynapse efficacyParasympathetic gangliaGanglion neuronsEPSP amplitudeSynaptic contactsSynaptic transmissionSynaptic inputsAged animalsPotential amplitudeNervous systemSynaptic boutonsAxonal processesNeuronsOld animalsPostsynaptic membrane
2003
Rapid labeling of neuronal populations by ballistic delivery of fluorescent dyes
Grutzendler J, Tsai J, Gan WB. Rapid labeling of neuronal populations by ballistic delivery of fluorescent dyes. Methods 2003, 30: 79-85. PMID: 12695105, DOI: 10.1016/s1046-2023(03)00009-4.Peer-Reviewed Original Research
2001
Two modes of radial migration in early development of the cerebral cortex
Nadarajah B, Brunstrom J, Grutzendler J, Wong R, Pearlman A. Two modes of radial migration in early development of the cerebral cortex. Nature Neuroscience 2001, 4: 143-150. PMID: 11175874, DOI: 10.1038/83967.Peer-Reviewed Original ResearchConceptsCerebral cortexAcute cortical slicesCertain genetic mutationsFinal laminar positionSite of originMovement of neuronsCortical slicesCortical neuronsRadial migrationCortical developmentLaminar positionSomal translocationGenetic mutationsCell-type specificDifferential effectsEarly ageCortexNeuronsMarginal zoneLeading processCellsTranslocationEarly developmentTime-lapse imaging
2000
Multicolor “DiOlistic” Labeling of the Nervous System Using Lipophilic Dye Combinations
Gan W, Grutzendler J, Wong W, Wong R, Lichtman J. Multicolor “DiOlistic” Labeling of the Nervous System Using Lipophilic Dye Combinations. Neuron 2000, 27: 219-225. PMID: 10985343, DOI: 10.1016/s0896-6273(00)00031-3.Peer-Reviewed Original ResearchConceptsNervous systemGolgi-like labelingNormal synaptic responsesComplex neuronal networksDendritic remodelingSynaptic responsesNeuronal preparationsNeuronal connectivityNeuronal circuitsIndividual neuronsNeuronsDye-coated particlesGene gunNeuronal networksStructural plasticityLipophilic dyeCellsGliaDiOlisticsLabeling