2019
Id4 Downstream of Notch2 Maintains Neural Stem Cell Quiescence in the Adult Hippocampus
Zhang R, Boareto M, Engler A, Louvi A, Giachino C, Iber D, Taylor V. Id4 Downstream of Notch2 Maintains Neural Stem Cell Quiescence in the Adult Hippocampus. Cell Reports 2019, 28: 1485-1498.e6. PMID: 31390563, DOI: 10.1016/j.celrep.2019.07.014.Peer-Reviewed Original ResearchConceptsNeural stem cellsDentate gyrusNSC quiescenceAdult mouse hippocampal dentate gyrusNSC proliferationMouse hippocampal dentate gyrusAdult dentate gyrusHippocampal dentate gyrusExpense of neurogenesisNeural stem cell quiescenceId4 knockdownAdult hippocampusNeuron generationId4 expressionNeuronal differentiationCell cycle entryNSC activationMajor effectorStem cell quiescenceNotch2NeurogenesisCell quiescenceStem cellsDownstream targetsNSC maintenance
2017
Combined HMG-COA reductase and prenylation inhibition in treatment of CCM
Nishimura S, Mishra-Gorur K, Park J, Surovtseva YV, Sebti SM, Levchenko A, Louvi A, Gunel M. Combined HMG-COA reductase and prenylation inhibition in treatment of CCM. Proceedings Of The National Academy Of Sciences Of The United States Of America 2017, 114: 5503-5508. PMID: 28500274, PMCID: PMC5448170, DOI: 10.1073/pnas.1702942114.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsAstrocytesDiphosphonatesDrosophilaDrug Evaluation, PreclinicalDrug Therapy, CombinationEndothelial CellsFatty Acids, MonounsaturatedFemaleFluvastatinHemangioma, Cavernous, Central Nervous SystemHigh-Throughput Screening AssaysHydroxymethylglutaryl-CoA Reductase InhibitorsImidazolesIndolesMaleMAP Kinase Signaling SystemMicePregnancyProtein PrenylationZoledronic AcidConceptsCerebral cavernous malformationsTreatment of CCMsCommon vascular anomaliesPotential pharmacological treatment optionsFocal neurological deficitsPharmacological treatment optionsCCM diseaseAcute mouse modelCentral nervous systemNeurological deficitsHemorrhagic strokePharmacological therapyLesion burdenVascular deficitsSymptomatic lesionsCombination therapyTreatment optionsVascular anomaliesGlial cellsCavernous malformationsMouse modelPrimary astrocytesNervous systemDrug AdministrationSustained inhibition
2016
B-Cell Depletion Reduces the Maturation of Cerebral Cavernous Malformations in Murine Models
Shi C, Shenkar R, Zeineddine HA, Girard R, Fam MD, Austin C, Moore T, Lightle R, Zhang L, Wu M, Cao Y, Gunel M, Louvi A, Rorrer A, Gallione C, Marchuk DA, Awad IA. B-Cell Depletion Reduces the Maturation of Cerebral Cavernous Malformations in Murine Models. Journal Of Neuroimmune Pharmacology 2016, 11: 369-377. PMID: 27086141, PMCID: PMC6746226, DOI: 10.1007/s11481-016-9670-0.Peer-Reviewed Original ResearchConceptsB-cell depletionCerebral cavernous malformationsCCM lesionsB cellsImmune responseMurine modelCavernous malformationsIron depositionB cell clonal expansionInflammatory cell infiltrationStage 2 lesionsProgression of lesionsBlood degradation productsCommon vascular malformationsPotential therapeutic agentROCK activityRho-kinase activityUntreated miceAntigenic triggerCell depletionCell infiltrationVascular malformationsImmune complexesTherapeutic benefitLesion genesisNotch1 and Notch2 receptors regulate mouse and human gastric antral epithelial cell homoeostasis
Gifford GB, Demitrack ES, Keeley TM, Tam A, La Cunza N, Dedhia PH, Spence JR, Simeone DM, Saotome I, Louvi A, Siebel CW, Samuelson LC. Notch1 and Notch2 receptors regulate mouse and human gastric antral epithelial cell homoeostasis. Gut 2016, 66: 1001. PMID: 26933171, PMCID: PMC5009003, DOI: 10.1136/gutjnl-2015-310811.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsAntibodies, Monoclonal, HumanizedApoptosisCell DifferentiationCell ProliferationCells, CulturedDibenzazepinesEpithelial CellsFemaleGastric MucosaGene ExpressionHomeostasisHumansMaleMiceMice, Inbred C57BLMice, TransgenicOrganoidsPyloric AntrumReceptor, Notch1Receptor, Notch2Receptors, G-Protein-CoupledSignal TransductionStem CellsConceptsEpithelial cell homeostasisCell homeostasisNotch receptorsNotch inhibitor dibenzazepineGlobal Notch inhibitionStem cellsAntral stem cellsHuman antral glandsAnalysis of miceNotch pathway receptorsLgr5 stem cellsCellular differentiationNotch signalingNotch2 receptorMolecular approachesPathway receptorsNotch pathway inhibitionHuman organoidsEpithelial cell proliferationNotch inhibitionInhibition of Notch1Notch inhibitorsOrganoid growthCell proliferationNotch2
2014
Ccm3, a gene associated with cerebral cavernous malformations, is required for neuronal migration
Louvi A, Nishimura S, Günel M. Ccm3, a gene associated with cerebral cavernous malformations, is required for neuronal migration. Development 2014, 141: 1404-1415. PMID: 24595293, PMCID: PMC3943187, DOI: 10.1242/dev.093526.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsApoptosis Regulatory ProteinsCell MovementCell ProliferationCyclin-Dependent Kinase 5FemaleHemangioma, Cavernous, Central Nervous SystemIntracellular Signaling Peptides and ProteinsMiceMice, KnockoutMice, TransgenicNeocortexNeural Stem CellsNeurogliaPregnancyRho GTP-Binding ProteinsRhoA GTP-Binding ProteinSignal TransductionConceptsCerebral cavernous malformation 3Neuronal migrationCerebral cavernous malformationsRadial glia progenitorsCell non-autonomous functionCerebrovascular disordersPyramidal neuronsCortical plateLaminar positioningSubventricular zoneCortical developmentCavernous malformationsRadial gliaLoss of functionNascent neuronsNeuronal morphologySevere malformationsGlia progenitorsNeural progenitorsNeuronsNon-autonomous functionsMalformationsRhoA pathwayPossible interactionsGlia
2013
Recessive loss of function of the neuronal ubiquitin hydrolase UCHL1 leads to early-onset progressive neurodegeneration
Bilguvar K, Tyagi NK, Ozkara C, Tuysuz B, Bakircioglu M, Choi M, Delil S, Caglayan AO, Baranoski JF, Erturk O, Yalcinkaya C, Karacorlu M, Dincer A, Johnson MH, Mane S, Chandra SS, Louvi A, Boggon TJ, Lifton RP, Horwich AL, Gunel M. Recessive loss of function of the neuronal ubiquitin hydrolase UCHL1 leads to early-onset progressive neurodegeneration. Proceedings Of The National Academy Of Sciences Of The United States Of America 2013, 110: 3489-3494. PMID: 23359680, PMCID: PMC3587195, DOI: 10.1073/pnas.1222732110.Peer-Reviewed Original ResearchMeSH KeywordsAdultAge of OnsetAmino Acid SequenceBase SequenceChild, PreschoolExomeFemaleGenes, RecessiveHomozygoteHumansHydrolysisMaleModels, MolecularMolecular Sequence DataMutation, MissenseNerve DegenerationNeuronsPedigreeProtein BindingSequence Analysis, DNASubstrate SpecificitySyndromeThermodynamicsUbiquitinUbiquitin ThiolesteraseConceptsUbiquitin C-terminal hydrolase L1Upper motor neuron dysfunctionMotor neuron dysfunctionProgressive neurodegenerative syndromeEarly-onset progressive neurodegenerationChildhood-onset blindnessWhole-exome sequencingNeuron dysfunctionHomozygous missense mutationIndex caseNervous systemProgressive neurodegenerationNeurodegenerative syndromeCerebellar ataxiaHydrolase activityNear complete lossComplete lossAffected individualsConsanguineous unionsMissense mutationsRecessive lossHomozygosity mappingProper positioningReduced affinitySpasticity
2010
Whole-exome sequencing identifies recessive WDR62 mutations in severe brain malformations
Bilgüvar K, Öztürk A, Louvi A, Kwan KY, Choi M, Tatlı B, Yalnızoğlu D, Tüysüz B, Çağlayan A, Gökben S, Kaymakçalan H, Barak T, Bakırcıoğlu M, Yasuno K, Ho W, Sanders S, Zhu Y, Yılmaz S, Dinçer A, Johnson MH, Bronen RA, Koçer N, Per H, Mane S, Pamir MN, Yalçınkaya C, Kumandaş S, Topçu M, Özmen M, Šestan N, Lifton RP, State MW, Günel M. Whole-exome sequencing identifies recessive WDR62 mutations in severe brain malformations. Nature 2010, 467: 207-210. PMID: 20729831, PMCID: PMC3129007, DOI: 10.1038/nature09327.Peer-Reviewed Original ResearchConceptsAbnormal cortical developmentWD repeat domain 62 (WDR62) geneSevere brain malformationsWhole-exome sequencingBrain abnormalitiesBrain malformationsCortical developmentMolecular pathogenesisCerebellar hypoplasiaWDR62 mutationsEmbryonic neurogenesisDiagnostic classificationMicrocephaly genesSmall family sizeGenetic heterogeneityWide spectrumRecessive mutationsPachygyriaPathogenesisHypoplasiaNeocortexNeurogenesisAbnormalitiesMalformationsMutationsL-Histidine Decarboxylase and Tourette's Syndrome
Ercan-Sencicek AG, Stillman AA, Ghosh AK, Bilguvar K, O'Roak BJ, Mason CE, Abbott T, Gupta A, King RA, Pauls DL, Tischfield JA, Heiman GA, Singer HS, Gilbert DL, Hoekstra PJ, Morgan TM, Loring E, Yasuno K, Fernandez T, Sanders S, Louvi A, Cho JH, Mane S, Colangelo CM, Biederer T, Lifton RP, Gunel M, State MW. L-Histidine Decarboxylase and Tourette's Syndrome. New England Journal Of Medicine 2010, 362: 1901-1908. PMID: 20445167, PMCID: PMC2894694, DOI: 10.1056/nejmoa0907006.Peer-Reviewed Original ResearchConceptsRare functional mutationsL-histidine decarboxylaseRate-limiting enzymeHDC geneTwo-generation pedigreeFunctional mutationsStrong genetic contributionHistamine biosynthesisAnalysis of linkageGenetic contributionModel systemRisk allelesDevelopmental neuropsychiatric disordersDecarboxylaseBiosynthesisGenesTourette syndromeMutationsAllelesEnzymeInheritanceNeuropsychiatric disordersPedigree
2008
Molecular Cytogenetic Analysis and Resequencing of Contactin Associated Protein-Like 2 in Autism Spectrum Disorders
Bakkaloglu B, O'Roak BJ, Louvi A, Gupta AR, Abelson JF, Morgan TM, Chawarska K, Klin A, Ercan-Sencicek AG, Stillman AA, Tanriover G, Abrahams BS, Duvall JA, Robbins EM, Geschwind DH, Biederer T, Gunel M, Lifton RP, State MW. Molecular Cytogenetic Analysis and Resequencing of Contactin Associated Protein-Like 2 in Autism Spectrum Disorders. American Journal Of Human Genetics 2008, 82: 165-173. PMID: 18179895, PMCID: PMC2253974, DOI: 10.1016/j.ajhg.2007.09.017.Peer-Reviewed Original ResearchConceptsAutism susceptibility candidate 2Contactin 4Plasma membrane fractionSynaptic plasma membrane fractionMolecular cytogenetic analysisComplex genetic etiologyRare variantsBioinformatics approachConserved positionNonsynonymous changesMembrane fractionRare homozygous mutationControl chromosomesBiochemical analysisNeurodevelopmental syndromeGenetic etiologyPathophysiology of ASDCandidate 2Recent findingsHomozygous mutationUnrelated familiesCytogenetic analysisMutationsVariantsResequencing
2005
Sequence Variants in SLITRK1 Are Associated with Tourette's Syndrome
Abelson JF, Kwan KY, O'Roak BJ, Baek DY, Stillman AA, Morgan TM, Mathews CA, Pauls DL, Rašin M, Gunel M, Davis NR, Ercan-Sencicek AG, Guez DH, Spertus JA, Leckman JF, Dure LS, Kurlan R, Singer HS, Gilbert DL, Farhi A, Louvi A, Lifton RP, Šestan N, State MW. Sequence Variants in SLITRK1 Are Associated with Tourette's Syndrome. Science 2005, 310: 317-320. PMID: 16224024, DOI: 10.1126/science.1116502.Peer-Reviewed Original ResearchMeSH Keywords3' Untranslated RegionsAdolescentAnimalsAttention Deficit Disorder with HyperactivityBrainChildChild, PreschoolChromosome InversionChromosome MappingChromosomes, Human, Pair 13DNADNA Mutational AnalysisFemaleFrameshift MutationHumansIn Situ Hybridization, FluorescenceMaleMembrane ProteinsMiceMutationNerve Tissue ProteinsPedigreeSequence Analysis, DNATourette SyndromeConceptsSequence variantsTourette syndromeChromosomal inversionsFrameshift mutantsCandidate genesExpression patternsControl chromosomesPrimary neuronal culturesFrameshift mutationSLITRK1Independent occurrenceMotor ticsDevelopmental neuropsychiatric disordersChronic vocalNeuronal culturesIdentical variantsUnrelated probandsBrain regionsNeuropsychiatric disordersSyndrome
1997
Growth-Promoting Interaction of IGF-II with the Insulin Receptor during Mouse Embryonic Development
Louvi A, Accili D, Efstratiadis A. Growth-Promoting Interaction of IGF-II with the Insulin Receptor during Mouse Embryonic Development. Developmental Biology 1997, 189: 33-48. PMID: 9281335, DOI: 10.1006/dbio.1997.8666.Peer-Reviewed Original ResearchConceptsInsulin receptorGrowth-promoting interactionsMouse embryonic developmentMouse embryonic growthLigand/receptor interactionsGrowth-promoting functionEmbryonic day 13.5IGF-IINull mutantsTargeted MutagenesisGrowth of embryosMouse embryogenesisDouble mutantTriple mutantEmbryonic developmentGenetic evidenceIGF1R resultsOrgan hypoplasiaGenetic analysisMutantsEmbryonic growthType 1 IGF receptorDay 13.5Receptor interactionEmbryos