2024
Reduced progranulin increases tau and α-synuclein inclusions and alters mouse tauopathy phenotypes via glucocerebrosidase
Takahashi H, Bhagwagar S, Nies S, Ye H, Han X, Chiasseu M, Wang G, Mackenzie I, Strittmatter S. Reduced progranulin increases tau and α-synuclein inclusions and alters mouse tauopathy phenotypes via glucocerebrosidase. Nature Communications 2024, 15: 1434. PMID: 38365772, PMCID: PMC10873339, DOI: 10.1038/s41467-024-45692-3.Peer-Reviewed Original ResearchConceptsTau inclusionsComorbid proteinopathiesTau aggregation in vitroPromotes tau aggregation in vitroAlzheimer's diseaseProgranulin reductionTDP-43 proteinopathyTauopathy phenotypeTau aggregationAD-tauHuman tauopathiesNeurofibrillary tanglesTauopathy miceReduction of progranulinPurified GlcCerTDP-43Concomitant accumulationAggregation in vitroAssociated with synucleinopathiesNeurodegenerative disordersProteinopathiesGCase inhibitionTauGCaseGlcCer
2017
Loss of TMEM106B Ameliorates Lysosomal and Frontotemporal Dementia-Related Phenotypes in Progranulin-Deficient Mice
Klein ZA, Takahashi H, Ma M, Stagi M, Zhou M, Lam TT, Strittmatter SM. Loss of TMEM106B Ameliorates Lysosomal and Frontotemporal Dementia-Related Phenotypes in Progranulin-Deficient Mice. Neuron 2017, 95: 281-296.e6. PMID: 28728022, PMCID: PMC5558861, DOI: 10.1016/j.neuron.2017.06.026.Peer-Reviewed Original ResearchConceptsLysosomal protein levelsFrontotemporal lobar degenerationProtein levelsMultiple lysosomal enzymesLysosomal enzymesV0 subunitsTMEM106B geneProteomic analysisProgranulin-deficient miceExtent of neurodegenerationCommon neurodegenerative disorderLysosomal acidificationLysosomal enzyme levelsProtein 1Microglial accumulationRisk modificationFTLD riskBehavioral abnormalitiesRetinal degenerationNeurodegenerative disordersFrontotemporal dementiaGRNTMEM106BFunctional relationshipEnzyme levelsOpposing effects of progranulin deficiency on amyloid and tau pathologies via microglial TYROBP network
Takahashi H, Klein ZA, Bhagat SM, Kaufman AC, Kostylev MA, Ikezu T, Strittmatter SM, For the Alzheimer’s Disease Neuroimaging Initiative. Opposing effects of progranulin deficiency on amyloid and tau pathologies via microglial TYROBP network. Acta Neuropathologica 2017, 133: 785-807. PMID: 28070672, PMCID: PMC5391267, DOI: 10.1007/s00401-017-1668-z.Peer-Reviewed Original ResearchConceptsAPP/PS1 micePS1 micePGRN deficiencyAlzheimer's diseaseAD risk variantsCerebrospinal fluid Aβ levelsLoss of progranulinMicroglial Aβ phagocytosisCSF tau levelsFrontotemporal lobar degenerationRisk variantsAPPswe/Aβ phagocytosisNeuronal injuryAβ levelsAβ pathologyCerebral amyloidosisAxonal dystrophyTau pathologyTau levelsComplement depositionPGRN levelsAD pathophysiologyAmyloid imagingProgranulin deficiency
2014
Progressive retinal degeneration and accumulation of autofluorescent lipopigments in Progranulin deficient mice
Hafler BP, Klein ZA, Zhou Z, Strittmatter SM. Progressive retinal degeneration and accumulation of autofluorescent lipopigments in Progranulin deficient mice. Brain Research 2014, 1588: 168-174. PMID: 25234724, PMCID: PMC4254024, DOI: 10.1016/j.brainres.2014.09.023.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsCells, CulturedElectroretinographyGranulinsImmunohistochemistryIntercellular Signaling Peptides and ProteinsMice, Inbred C57BLMice, KnockoutMicroscopy, ConfocalNeuronal Ceroid-LipofuscinosesOptical ImagingPhotoreceptor Cells, VertebrateProgranulinsRetinal DegenerationRetinal Ganglion CellsConceptsProgranulin-deficient miceNeuronal ceroid lipofuscinosisAdult-onset neuronal ceroid lipofuscinosisDeficient miceRetinal degenerationCeroid lipofuscinosisRetinal ganglion cellsCentral nervous systemAutofluorescent storage materialMotor dysfunctionNeuropathological analysisGanglion cellsVision lossOptic atrophyEarly deathAutofluorescent lipopigmentsClinical observationsNervous systemDegenerative pathologyMiceDegenerationHomozygous mutationAutofluorescent materialPatientsNeurons
2010
Sortilin-Mediated Endocytosis Determines Levels of the Frontotemporal Dementia Protein, Progranulin
Hu F, Padukkavidana T, Vægter CB, Brady OA, Zheng Y, Mackenzie IR, Feldman HH, Nykjaer A, Strittmatter SM. Sortilin-Mediated Endocytosis Determines Levels of the Frontotemporal Dementia Protein, Progranulin. Neuron 2010, 68: 654-667. PMID: 21092856, PMCID: PMC2990962, DOI: 10.1016/j.neuron.2010.09.034.Peer-Reviewed Original ResearchConceptsFrontotemporal lobar degenerationSerum PGRN levelsFTLD-TDP casesFTLD-TDPMicroglial cellsPGRN levelsCortical neuronsGRN haploinsufficiencyProgranulin mutationsTDP-43Causative rolePGRNUbiquitin aggregatesNeuronsSortilinMiceCell surfaceDetermine levelsPathophysiologyInjuryProgranulinCNSCentral roleDegenerationBrain