2021
Distinct functions of POT1 proteins contribute to the regulation of telomerase recruitment to telomeres
Gu P, Jia S, Takasugi T, Tesmer VM, Nandakumar J, Chen Y, Chang S. Distinct functions of POT1 proteins contribute to the regulation of telomerase recruitment to telomeres. Nature Communications 2021, 12: 5514. PMID: 34535663, PMCID: PMC8448735, DOI: 10.1038/s41467-021-25799-7.Peer-Reviewed Original ResearchConceptsDNA damage responseTelomerase recruitmentPOT1 proteinsDamage responseATR-dependent DNA damage responseNon-homologous end-joining DNA repair pathwayRecruitment of telomeraseC-strand fillAmino acidsDNA repair pathwaysUnique amino acidsTEN1 (CST) complexTelomere extensionCTC1-STN1Stable heterodimerRepair pathwaysC-terminusDistinct functionsPOT1bPOT1aTelomeresC-strandG-strandTPP1Protein
2017
Cytogenetic Analysis of Telomere Dysfunction
Rai R, Multani AS, Chang S. Cytogenetic Analysis of Telomere Dysfunction. Methods In Molecular Biology 2017, 1587: 127-131. PMID: 28324504, DOI: 10.1007/978-1-4939-6892-3_12.Peer-Reviewed Original Research
2014
Synergistic tumor suppression by combined inhibition of telomerase and CDKN1A
Gupta R, Dong Y, Solomon PD, Wettersten HI, Cheng CJ, Min JN, Henson J, Dogra SK, Hwang SH, Hammock BD, Zhu LJ, Reddel RR, Saltzman WM, Weiss RH, Chang S, Green MR, Wajapeyee N. Synergistic tumor suppression by combined inhibition of telomerase and CDKN1A. Proceedings Of The National Academy Of Sciences Of The United States Of America 2014, 111: e3062-e3071. PMID: 25024194, PMCID: PMC4121806, DOI: 10.1073/pnas.1411370111.Peer-Reviewed Original ResearchConceptsP53-mediated transcriptional activationCyclin-dependent kinase inhibitor 1AMutant p53Telomerase inhibitionTumor suppressor p53Transcriptional activationSynergistic tumor suppressionTelomere dysfunctionCheckpoint proteinsP53 upregulated modulatorTumor suppressionCDK inhibitorsSuppressor p53Inhibitor 1AP53 activityTelomeraseHuman cancersCancer cell linesApoptosis inductionPharmacological inhibitionApoptosisCell linesPharmacological restorationP21Growth inhibition
2010
Defending the end zone: Studying the players involved in protecting chromosome ends
Chan SS, Chang S. Defending the end zone: Studying the players involved in protecting chromosome ends. FEBS Letters 2010, 584: 3773-3778. PMID: 20579983, PMCID: PMC3657741, DOI: 10.1016/j.febslet.2010.06.016.Peer-Reviewed Original Research
2009
Pot1b Deletion and Telomerase Haploinsufficiency in Mice Initiate an ATR-Dependent DNA Damage Response and Elicit Phenotypes Resembling Dyskeratosis Congenita
He H, Wang Y, Guo X, Ramchandani S, Ma J, Shen MF, Garcia DA, Deng Y, Multani AS, You MJ, Chang S. Pot1b Deletion and Telomerase Haploinsufficiency in Mice Initiate an ATR-Dependent DNA Damage Response and Elicit Phenotypes Resembling Dyskeratosis Congenita. Molecular And Cellular Biology 2009, 29: 229-240. PMID: 18936156, PMCID: PMC2612488, DOI: 10.1128/mcb.01400-08.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsAtaxia Telangiectasia Mutated ProteinsBone Marrow CellsCell Cycle ProteinsCell DeathCell ProliferationDNA DamageDNA-Binding ProteinsDyskeratosis CongenitaGene DeletionHaploidyHematopoietic SystemMiceMice, KnockoutNucleic Acid ConformationOrgan SpecificityPhenotypeProtein Serine-Threonine KinasesSurvival AnalysisTelomeraseTelomereConceptsDisease dyskeratosis congenitaATR-dependent DNA damage responseDNA damage responseTelomerase haploinsufficiencyDamage responseBone marrow failureTelomeres 1 (POT1) proteinDyskeratosis congenitaProliferative tissueGenome integrityPOT1 functionChromosome endsMarrow failureEnd fusionsG-overhangsChromosome instabilityTelomerase deficiencyGerm cellsBinding proteinHematopoietic progenitorsStem cellsSurvival potentialEssential roleLong-term viabilityCellular viability
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 modelChromosomesDysfunctionProteinApoptosisDual roles of telomere dysfunction in initiation and suppression of tumorigenesis
Cosme-Blanco W, Chang S. Dual roles of telomere dysfunction in initiation and suppression of tumorigenesis. Experimental Cell Research 2008, 314: 1973-1979. PMID: 18448098, PMCID: PMC3690559, DOI: 10.1016/j.yexcr.2008.03.011.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsDNA DamageHumansNeoplasmsPrecancerous ConditionsTelomeraseTelomereTumor Suppressor Protein p53ConceptsDNA double-strand breaksDysfunctional telomeresGenomic instabilityPotent tumor suppressor mechanismTumorigenic potentialSimple repeat sequencesTumor suppressor mechanismDouble-strand breaksCell tumorigenic potentialSuppression of tumorigenesisCancer cellsChromosomal endsTelomere dysfunctionCellular senescenceRepeat sequencesGenetic changesTelomeresGenetic lesionsP53 pathwayTumor initiationDicentric chromosomesSuppressor mechanismIntact p53 pathwayHuman carcinomasRare cellsEvidence 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 ResearchConceptsHuman 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 results
2005
Modeling aging and cancer in the telomerase knockout mouse
Chang S. Modeling aging and cancer in the telomerase knockout mouse. Mutation Research/Fundamental And Molecular Mechanisms Of Mutagenesis 2005, 576: 39-53. PMID: 15927211, DOI: 10.1016/j.mrfmmm.2004.08.020.Peer-Reviewed Original ResearchConceptsTelomere dysfunctionRole of telomeresTelomerase-null miceTelomerase knockout miceTelomerase-deficient miceOrganismal agingSomatic cellsMammalian organismsTight regulationCellular responsesTelomerase activityNull miceKnockout miceTelomeresMouse modelTelomeraseOrganismsMiceDeficient miceRegulationAgingCellsCancerModeling premature aging syndromes with the telomerase knockout mouse.
Chang S. Modeling premature aging syndromes with the telomerase knockout mouse. 2005, 5: 153-8. PMID: 15974868, DOI: 10.2174/1566524053586662.Peer-Reviewed Original ResearchMeSH KeywordsAging, PrematureAnimalsDisease Models, AnimalMiceMice, KnockoutMutationSyndromeTelomeraseConceptsTelomerase knockout miceMammalian agingGenomic instabilityDNA damage pathwayPremature aging syndromesCellular declineMolecular basisAging syndromesAging processDamage pathwayKnockout miceMolecular pathwaysShort telomeresHuman agingPrimate model systemMouse modelModel systemBiological mechanismsPhenotypePhysiological changesPathwayUnprecedented opportunityDeleterious effectsTelomeresMice
2003
Telomere-based crisis: functional differences between telomerase activation and ALT in tumor progression
Chang S, Khoo C, Naylor M, Maser R, DePinho R. Telomere-based crisis: functional differences between telomerase activation and ALT in tumor progression. Genes & Development 2003, 17: 88-100. PMID: 12514102, PMCID: PMC195968, DOI: 10.1101/gad.1029903.Peer-Reviewed Original ResearchConceptsInk4a/Lung metastasesSubcutaneous tumorsTumor progressionTelomerase activationSubcutaneous tumor formationAdvanced human cancersTail vein injectionTelomere dysfunctionLate passagesMalignant endpointsTelomerase-independent alternative lengtheningImmunocompromised miceFunctional differencesCytogenetic profileMetastatic activityDysfunctionMetastasisCancer cell genomeTumor formationChromosomal aberrationsHuman cancersMarked increaseInitiated cellsMouse embryonic fibroblast cultures
2002
Telomerase extracurricular activities
Chang S, DePinho R. Telomerase extracurricular activities. Proceedings Of The National Academy Of Sciences Of The United States Of America 2002, 99: 12520-12522. PMID: 12271146, PMCID: PMC130491, DOI: 10.1073/pnas.212514699.Peer-Reviewed Original ResearchTelomere dysfunction provokes regional amplification and deletion in cancer genomes
O'Hagan R, Chang S, Maser R, Mohan R, Artandi S, Chin L, DePinho R. Telomere dysfunction provokes regional amplification and deletion in cancer genomes. Cancer Cell 2002, 2: 149-155. PMID: 12204535, DOI: 10.1016/s1535-6108(02)00094-6.Peer-Reviewed Original ResearchConceptsTelomere dysfunctionAged humansMajor cancersPathogenic significanceDysfunctionEpithelial carcinogenesisArray comparative genomic hybridizationComparative genomic hybridizationCancer hotspotsGenomic profilesNonreciprocal translocationsTumorsMiceCarcinogenesisGenomic hybridizationChromosomal instability
2001
Rescue of a telomere length defect of Nijmegen breakage syndrome cells requires NBS and telomerase catalytic subunit
Ranganathan V, Heine W, Ciccone D, Rudolph K, Wu X, Chang S, Hai H, Ahearn I, Livingston D, Resnick I, Rosen F, Seemanova E, Jarolim P, DePinho R, Weaver D. Rescue of a telomere length defect of Nijmegen breakage syndrome cells requires NBS and telomerase catalytic subunit. Current Biology 2001, 11: 962-966. PMID: 11448772, DOI: 10.1016/s0960-9822(01)00267-6.Peer-Reviewed Original ResearchConceptsNijmegen breakage syndromeNBS fibroblastsNBS patientsCatalytic subunitChromosome instabilityNijmegen breakage syndrome cellsDNA repair complexRare human diseasesTRF proteinsTelomere extensionNBS cellsTelomere endsRepair complexAccessory proteinsBreakage syndromeGrowth cessationHuman diseasesCancer predispositionLength defectsTelomeresPremature growth cessationProliferative capacitySubunitsProteinGamma irradiation damageModeling chromosomal instability and epithelial carcinogenesis in the telomerase-deficient mouse
Chang S, Khoo C, DePinho R. Modeling chromosomal instability and epithelial carcinogenesis in the telomerase-deficient mouse. Seminars In Cancer Biology 2001, 11: 227-238. PMID: 11407947, DOI: 10.1006/scbi.2000.0374.Peer-Reviewed Original ResearchConceptsComplex cytogenetic profileHuman carcinomasChromosomal structural aberrationsTelomerase-deficient miceEukaryotic chromosomesNucleoprotein complexesGenomic instabilitySpecies distinctionP53 mutant miceChromosomal instabilityTumor suppressor gene mutationsShort telomeresSuppressor gene mutationsMutant miceStructural aberrationsEpithelial carcinogenesisGene mutationsCytogenetic profileChromosomesTelomeresMiceMutationsRegulationHumansAneuploidy
2000
Telomere dysfunction promotes non-reciprocal translocations and epithelial cancers in mice
Artandi S, Chang S, Lee S, Alson S, Gottlieb G, Chin L, DePinho R. Telomere dysfunction promotes non-reciprocal translocations and epithelial cancers in mice. Nature 2000, 406: 641-645. PMID: 10949306, DOI: 10.1038/35020592.Peer-Reviewed Original ResearchConceptsEpithelial cancersSoft tissue sarcomasTelomere lengthP53 mutant miceTumor suppressor gene mutationsSuppressor gene mutationsNon-reciprocal translocationsTissue sarcomasTelomere dysfunctionAged humansMutant miceCytogenetic featuresCancerMiceHuman carcinomasGene mutationsEpithelial renewalTelomerase expressionCritical reductionCarcinomaDysfunctionHigh rateReverse transcriptaseEukaryotic chromosomesNucleoprotein complexesInhibition of Experimental Liver Cirrhosis in Mice by Telomerase Gene Delivery
Rudolph K, Chang S, Millard M, Schreiber-Agus N, DePinho R. Inhibition of Experimental Liver Cirrhosis in Mice by Telomerase Gene Delivery. Science 2000, 287: 1253-1258. PMID: 10678830, DOI: 10.1126/science.287.5456.1253.Peer-Reviewed Original ResearchConceptsLiver cirrhosisChronic diseasesEnd-stage organ failureChronic liver injuryImproved liver functionExperimental liver cirrhosisLiver injuryOrgan failureLiver functionTelomerase-deficient miceTelomere dysfunctionHigh cellular turnoverTelomerase therapyChemical ablationCirrhosisAdenoviral deliveryLiver regenerationSuch diseasesDiseaseMiceTelomerase activityDysfunctionLiverCellular turnoverShort dysfunctional telomeres
1999
Longevity, Stress Response, and Cancer in Aging Telomerase-Deficient Mice
Rudolph K, Chang S, Lee H, Blasco M, Gottlieb G, Greider C, DePinho R. Longevity, Stress Response, and Cancer in Aging Telomerase-Deficient Mice. Cell 1999, 96: 701-712. PMID: 10089885, DOI: 10.1016/s0092-8674(00)80580-2.Peer-Reviewed Original ResearchConceptsOrganismal aging processTelomerase-null miceTelomerase-deficient miceTelomere functionOrganismal levelTelomere maintenanceCellular senescenceOverall fitnessPhysiological processesStress responseHematopoietic ablationGenetic instabilityTelomere lengthNull miceCritical roleLife spanWound healingAging processSpontaneous malignanciesSenescenceOrganismsFitnessPathophysiological symptomsRoleMice