2016
Dysfunctional telomeres induce p53‐dependent and independent apoptosis to compromise cellular proliferation and inhibit tumor formation
Wang Y, Wang X, Flores ER, Yu J, Chang S. Dysfunctional telomeres induce p53‐dependent and independent apoptosis to compromise cellular proliferation and inhibit tumor formation. Aging Cell 2016, 15: 646-660. PMID: 27113195, PMCID: PMC4933665, DOI: 10.1111/acel.12476.Peer-Reviewed Original Research
2013
The mINO80 chromatin remodeling complex is required for efficient telomere replication and maintenance of genome stability
Min JN, Tian Y, Xiao Y, Wu L, Li L, Chang S. The mINO80 chromatin remodeling complex is required for efficient telomere replication and maintenance of genome stability. Cell Research 2013, 23: 1396-1413. PMID: 23979016, PMCID: PMC3847565, DOI: 10.1038/cr.2013.113.Peer-Reviewed Original ResearchMeSH KeywordsAllelesAnimalsCells, CulturedCellular SenescenceChromatinChromatin Assembly and DisassemblyDNA Breaks, Double-StrandedDNA HelicasesDNA RepairDNA ReplicationFibroblastsGenomic InstabilityHydroxyureaMiceMice, Inbred C57BLMice, KnockoutMutationNucleic Acid Synthesis InhibitorsTelomereTumor Suppressor Protein p53ConceptsHomology-directed DNA repairEfficient telomere replicationGenome stabilityTelomere replicationDependent DNA damage responseDNA double-strand breaksDNA damage responseDNA damage fociMammalian cell linesATPase catalytic subunitConditional knockout approachDouble-strand breaksINO80 chromatinChromatin remodelingOrganismal functionTranscriptional regulationFragile telomeresDamage responseDNA replicationCatalytic subunitDamage fociDysfunctional telomeresSingle-strand DNADNA repairKnockout approach
2010
The telomere protein tankyrase 1 regulates DNA damage responses at telomeres
Chang S. The telomere protein tankyrase 1 regulates DNA damage responses at telomeres. Aging 2010, 2: 639-642. PMID: 21076181, PMCID: PMC2993793, DOI: 10.18632/aging.100221.Peer-Reviewed Original Research
2008
Critical and Distinct Roles of p16 and Telomerase in Regulating the Proliferative Life Span of Normal Human Prostate Epithelial Progenitor Cells*
Bhatia B, Jiang M, Suraneni M, Patrawala L, Badeaux M, Schneider-Broussard R, Multani AS, Jeter CR, Calhoun-Davis T, Hu L, Hu J, Tsavachidis S, Zhang W, Chang S, Hayward SW, Tang DG. Critical and Distinct Roles of p16 and Telomerase in Regulating the Proliferative Life Span of Normal Human Prostate Epithelial Progenitor Cells*. Journal Of Biological Chemistry 2008, 283: 27957-27972. PMID: 18662989, PMCID: PMC2562067, DOI: 10.1074/jbc.m803467200.Peer-Reviewed Original ResearchConceptsProliferative life spanNHP cellsMolecular mechanismsProgenitor cellsSuppression of p16Normal human prostate epithelial cellsGene expression profilesLife spanProstate epithelial progenitor cellsHuman prostate epithelial cellsRegulation of p16Activation of p53Prostate epithelial cellsEpithelial progenitor cellsCell proliferative capacityExpression profilesBasal-like cellsProgenitor markersMultilineage differentiationTelomerase expressionDistinct rolesCell life spanCell marker CD44P16 inhibitionEpithelial cellsTelomere dysfunction and tumour suppression: the senescence connection
Deng Y, Chan SS, Chang S. Telomere dysfunction and tumour suppression: the senescence connection. Nature Reviews Cancer 2008, 8: 450-458. PMID: 18500246, PMCID: PMC3688269, DOI: 10.1038/nrc2393.Peer-Reviewed Original ResearchConceptsTelomere dysfunctionDysfunctional telomeresDNA damage responseKey PointsTelomeresEukaryotic chromosomesGenome instabilityShelterin complexApoptotic programDamage responseRepetitive sequencesCellular senescenceTelomeric endTumor suppressionProtein resultsP53 pathwayMutant p53TelomeresSpontaneous tumorigenesisSenescenceTumorigenesisMouse modelChromosomesDysfunctionProteinApoptosisEvidence that senescent human prostate epithelial cells enhance tumorigenicity: Cell fusion as a potential mechanism and inhibition by p16INK4a and hTERT
Bhatia B, Multani AS, Patrawala L, Chen X, Calhoun‐Davis T, Zhou J, Schroeder L, Schneider‐Broussard R, Shen J, Pathak S, Chang S, Tang DG. Evidence that senescent human prostate epithelial cells enhance tumorigenicity: Cell fusion as a potential mechanism and inhibition by p16INK4a and hTERT. International Journal Of Cancer 2008, 122: 1483-1495. PMID: 18059027, DOI: 10.1002/ijc.23222.Peer-Reviewed Original ResearchConceptsHuman prostate epithelial cellsNHP cellsProstate epithelial cellsCell fusionVivo tumorigenicityTumor cellsTumor developmentNormal human prostate epithelial cellsEpithelial cellsAR mRNA expressionCell-cell fusionProstate cancer cell linesPotential mechanismsGene expression analysisP16INK4a protein expressionModel cell systemGenomic stabilityLNCaP prostate cancerCancer cell linesExogenous p16Expression analysisProstate cancerSenescent fibroblastsProgenitor markersProstate tumorigenesis
2007
Role of telomeres and telomerase in genomic instability, senescence and cancer
Deng Y, Chang S. Role of telomeres and telomerase in genomic instability, senescence and cancer. Laboratory Investigation 2007, 87: 1071-1076. PMID: 17767195, DOI: 10.1038/labinvest.3700673.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsCell Transformation, NeoplasticCellular SenescenceGenomic InstabilityHumansNeoplasmsTelomeraseTelomereConceptsHuman cancersAnti-telomerase therapyAttractive therapeutic targetClinical trialsTherapeutic targetDNA damage responseRole of telomeresAbsence of p53Progressive lossHuman carcinomasSuppress tumorigenesisCancerLinear chromosomesCellular senescenceDamage responseTelomeric repeatsDysfunctional telomeresGenomic instabilityTelomeric structureChromosomal instabilityTelomeresP53TelomeraseImportant mechanismFunction resultsTelomere dysfunction suppresses spontaneous tumorigenesis in vivo by initiating p53‐dependent cellular senescence
Cosme-Blanco W, Shen MF, Lazar AJ, Pathak S, Lozano G, Multani AS, Chang S. Telomere dysfunction suppresses spontaneous tumorigenesis in vivo by initiating p53‐dependent cellular senescence. EMBO Reports 2007, 8: 497-503. PMID: 17396137, PMCID: PMC1866197, DOI: 10.1038/sj.embor.7400937.Peer-Reviewed Original ResearchConceptsP53-dependent cellular senescenceSpontaneous tumorigenesisCellular senescenceCellular senescence pathwaysSenescence pathwaysCell cycle arrestSkin carcinomasSenescence markersTumorigenesisMiceDysfunctional telomeresTumor suppressionTelomere dysfunctionP53ApoptosisVivoSuppressionCarcinomaDysfunctionPathwaySenescence
2006
POT1b protects telomeres from end‐to‐end chromosomal fusions and aberrant homologous recombination
He H, Multani AS, Cosme‐Blanco W, Tahara H, Ma J, Pathak S, Deng Y, Chang S. POT1b protects telomeres from end‐to‐end chromosomal fusions and aberrant homologous recombination. The EMBO Journal 2006, 25: 5180-5190. PMID: 17053789, PMCID: PMC1630418, DOI: 10.1038/sj.emboj.7601294.Peer-Reviewed Original ResearchPot1 Deficiency Initiates DNA Damage Checkpoint Activation and Aberrant Homologous Recombination at Telomeres
Wu L, Multani AS, He H, Cosme-Blanco W, Deng Y, Deng JM, Bachilo O, Pathak S, Tahara H, Bailey SM, Deng Y, Behringer RR, Chang S. Pot1 Deficiency Initiates DNA Damage Checkpoint Activation and Aberrant Homologous Recombination at Telomeres. Cell 2006, 126: 49-62. PMID: 16839876, DOI: 10.1016/j.cell.2006.05.037.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsCell Cycle ProteinsCells, CulturedCellular SenescenceChromosome AberrationsDNA DamageDNA RepairDNA-Binding ProteinsGene SilencingGenes, cdcGenomic InstabilityMiceMice, KnockoutNuclear ProteinsProtein IsoformsRecombination, GeneticSequence HomologyShelterin ComplexSister Chromatid ExchangeTelomereTelomere-Binding ProteinsConceptsAberrant homologous recombinationHomologous recombinationTelomere sister chromatid exchangeDNA damage checkpoint activationOverall genomic stabilityTelomere length regulationDNA damage machineryDNA damage responseT-loop structureChromosomal end protectionMammalian telomeresPOT1 proteinsTelomere integrityCheckpoint activationGenomic stabilityLength regulationMouse genomeDamage responseEnd protectionReplicative senescenceDNA breaksRich overhangTelomeresChromosomal instabilityConditional deletion
2005
Elevated telomere-telomere recombination in WRN-deficient, telomere dysfunctional cells promotes escape from senescence and engagement of the ALT pathway
Laud PR, Multani AS, Bailey SM, Wu L, Ma J, Kingsley C, Lebel M, Pathak S, DePinho RA, Chang S. Elevated telomere-telomere recombination in WRN-deficient, telomere dysfunctional cells promotes escape from senescence and engagement of the ALT pathway. Genes & Development 2005, 19: 2560-2570. PMID: 16264192, PMCID: PMC1276730, DOI: 10.1101/gad.1321305.Peer-Reviewed Original ResearchConceptsWerner syndromeSister chromatidsT-SCETelomere sister chromatid exchangeElevated recombination ratesActivation of ALTWRN functionAberrant recombinationGenomic instabilityALT pathwayChromosomal aberrationsChromosomal instabilityTelomeresPremature agingDysfunctional cellsTumor formationChromatidsSister chromatid exchangesPathwayChromatid exchangesRecombinationRecombination rateCellsWRNMutants
2004
Essential role of limiting telomeres in the pathogenesis of Werner syndrome
Chang S, Multani AS, Cabrera NG, Naylor ML, Laud P, Lombard D, Pathak S, Guarente L, DePinho RA. Essential role of limiting telomeres in the pathogenesis of Werner syndrome. Nature Genetics 2004, 36: 877-882. PMID: 15235603, DOI: 10.1038/ng1389.Peer-Reviewed Original ResearchConceptsWerner syndromeCultured cellsComplex cellular phenotypesElevated genomic instabilityDNA damage fociPremature aging syndromesWRN deficiencyReplicative senescenceCellular phenotypesGenomic instabilityAging syndromesGenetic dataMutational inactivationPremature senescenceChromosomal instabilityTelomerase expressionHair grayingPremature agingDisease phenotypeEssential roleWRNMice nullSenescenceAutosomal recessive diseaseType II diabetesEndogenous oncogenic K-rasG12D stimulates proliferation and widespread neoplastic and developmental defects
Tuveson D, Shaw A, Willis N, Silver D, Jackson E, Chang S, Mercer K, Grochow R, Hock H, Crowley D, Hingorani S, Zaks T, King C, Jacobetz M, Wang L, Bronson R, Orkin S, DePinho R, Jacks T. Endogenous oncogenic K-rasG12D stimulates proliferation and widespread neoplastic and developmental defects. Cancer Cell 2004, 5: 375-387. PMID: 15093544, DOI: 10.1016/s1535-6108(04)00085-6.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsCell CycleCell DivisionCell Transformation, NeoplasticCellular SenescenceCongenital AbnormalitiesCrosses, GeneticCyclin-Dependent Kinase Inhibitor p16Embryo, MammalianFemaleFibroblastsGene Expression Regulation, DevelopmentalGenes, rasIntegrasesMaleMiceMice, Inbred C57BLMice, TransgenicMutationNeoplasmsStem CellsTumor Suppressor Protein p14ARFTumor Suppressor Protein p53Viral ProteinsConceptsCanonical Ras effectorRas effectorsOncogenic RasEmbryonic developmentAbnormal cellular proliferationDevelopmental defectsRas oncogeneGenetic lesionsConditional expressionWidespread expressionK-RasG12DCellular proliferationFurther genetic abnormalitiesEnhanced proliferationOncogeneProliferationExpressionGenetic abnormalitiesEffectorsMutationsAllelesRegulationPathwayFibroblastsFrank malignancy