2023
Phosphorylation stabilized TET1 acts as an oncoprotein and therapeutic target in B cell acute lymphoblastic leukemia
Chen Z, Zhou K, Xue J, Small A, Xiao G, Nguyen L, Zhang Z, Prince E, Weng H, Huang H, Zhao Z, Qing Y, Shen C, Li W, Han L, Tan B, Su R, Qin H, Li Y, Wu D, Gu Z, Ngo V, He X, Chao J, Leung K, Wang K, Dong L, Qin X, Cai Z, Sheng Y, Chen Y, Wu X, Zhang B, Shi Y, Marcucci G, Qian Z, Xu M, Müschen M, Chen J, Deng X. Phosphorylation stabilized TET1 acts as an oncoprotein and therapeutic target in B cell acute lymphoblastic leukemia. Science Translational Medicine 2023, 15: eabq8513. PMID: 36989375, PMCID: PMC11163962, DOI: 10.1126/scitranslmed.abq8513.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsDNA-Binding ProteinsMicePhosphorylationPrecursor Cell Lymphoblastic Leukemia-LymphomaProto-Oncogene ProteinsSignal TransductionStaurosporineConceptsB-cell acute lymphoblastic leukemiaCell acute lymphoblastic leukemiaAcute lymphoblastic leukemiaB-ALLRefractory/Oncogenic roleLymphoblastic leukemiaProtein kinase C epsilonOverall survival rateNormal precursor B cellsCrucial oncogenic rolePrecursor B cellsAdult patientsPDX modelsPharmacological targetingTherapeutic targetB cellsImproved therapiesSurvival rateLeukemia progressionTherapeutic potentialOverexpression of TET1TET1 proteinATM serine/threonine kinaseLeukemia
2021
PON2 subverts metabolic gatekeeper functions in B cells to promote leukemogenesis
Pan L, Hong C, Chan LN, Xiao G, Malvi P, Robinson ME, Geng H, Reddy ST, Lee J, Khairnar V, Cosgun KN, Xu L, Kume K, Sadras T, Wang S, Wajapeyee N, Müschen M. PON2 subverts metabolic gatekeeper functions in B cells to promote leukemogenesis. Proceedings Of The National Academy Of Sciences Of The United States Of America 2021, 118: e2016553118. PMID: 33531346, PMCID: PMC7896313, DOI: 10.1073/pnas.2016553118.Peer-Reviewed Original ResearchMeSH KeywordsAdenosine TriphosphateAnimalsAryldialkylphosphataseB-LymphocytesCarcinogenesisCell Line, TumorCells, CulturedGlucoseGlucose Transporter Type 1HumansMembrane ProteinsMiceMice, Inbred C57BLPrecursor Cell Lymphoblastic Leukemia-LymphomaProtein BindingConceptsTransplant recipient miceDNA double-strand breaksNormal B cell developmentDouble-strand breaksB cell developmentGenetic deletionB cellsLymphoid transcription factorsGlucose transporter GLUT1Gatekeeper functionGlucose uptakeRecipient miceTranscription factorsSomatic recombinationSynthetic lethalityB-cell acute lymphoblastic leukemiaCell developmentMetabolic gatekeeperRefractory B-ALLDeficient murineCell acute lymphoblastic leukemiaPoor clinical outcomeCell typesAcute lymphoblastic leukemiaGlucose transport
2019
Rationale for targeting BCL6 in MLL-rearranged acute lymphoblastic leukemia
Hurtz C, Chan LN, Geng H, Ballabio E, Xiao G, Deb G, Khoury H, Chen CW, Armstrong SA, Chen J, Ernst P, Melnick A, Milne T, Müschen M. Rationale for targeting BCL6 in MLL-rearranged acute lymphoblastic leukemia. Genes & Development 2019, 33: 1265-1279. PMID: 31395741, PMCID: PMC6719625, DOI: 10.1101/gad.327593.119.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsBiomarkers, TumorCell SurvivalCells, CulturedGene DeletionGene Expression Regulation, LeukemicGene TargetingHumansMiceMyeloid-Lymphoid Leukemia ProteinOncogene Proteins, FusionPrecursor Cell Lymphoblastic Leukemia-LymphomaPrognosisPromoter Regions, GeneticProto-Oncogene Proteins c-bcl-6ConceptsB-cell acute lymphoblastic leukemiaAcute lymphoblastic leukemiaLymphoblastic leukemiaPharmacological inhibitionGroup of patientsBCL6 expressionBone marrow biopsyBH3 mimetic ABT-199Transplant recipient miceMLL fusionsB-cell transformationMarrow biopsyTreatment of MLLDismal outcomeRecipient miceNormal B cell developmentImmunohistochemical stainingTranscriptional activationB cell developmentMalignant transformationDrug resistanceGenetic deletionPatient samplesExpression of BimMLL-ENL fusion
2018
B-Cell-Specific Diversion of Glucose Carbon Utilization Reveals a Unique Vulnerability in B Cell Malignancies
Xiao G, Chan LN, Klemm L, Braas D, Chen Z, Geng H, Zhang QC, Aghajanirefah A, Cosgun KN, Sadras T, Lee J, Mirzapoiazova T, Salgia R, Ernst T, Hochhaus A, Jumaa H, Jiang X, Weinstock DM, Graeber TG, Müschen M. B-Cell-Specific Diversion of Glucose Carbon Utilization Reveals a Unique Vulnerability in B Cell Malignancies. Cell 2018, 173: 470-484.e18. PMID: 29551267, PMCID: PMC6284818, DOI: 10.1016/j.cell.2018.02.048.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsB-LymphocytesCarbonCell Line, TumorCell SurvivalGlucoseGlucosephosphate DehydrogenaseGlycolysisHumansIkaros Transcription FactorMiceMice, Inbred C57BLMice, Inbred NODOxidative StressPAX5 Transcription FactorPentose Phosphate PathwayPrecursor Cell Lymphoblastic Leukemia-LymphomaProtein Phosphatase 2Proto-Oncogene Proteins c-bcl-2Transcription, GeneticConceptsPentose phosphate pathwayCarbon utilizationSerine/threonine protein phosphatase 2AB-cell transcription factor PAX5Transcription factor Pax5Favor of glycolysisSmall molecule inhibitionPhosphatase 2ATranscriptional repressionRedox homeostasisOncogenic transformationTumor suppressorMolecule inhibitionPP2AGenetic studiesPhosphate pathwayB cell activationEssential roleB-cell malignanciesCell malignanciesB cellsAntioxidant protectionOxidative stressB-cell tumorsCell activationAutoimmunity checkpoints as therapeutic targets in B cell malignancies
Müschen M. Autoimmunity checkpoints as therapeutic targets in B cell malignancies. Nature Reviews Cancer 2018, 18: 103-116. PMID: 29302068, DOI: 10.1038/nrc.2017.111.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsAntineoplastic AgentsAutoimmunityB-LymphocytesHumansLymphoma, B-CellPrecursor Cell Lymphoblastic Leukemia-LymphomaReceptors, Antigen, B-Cell
2017
Antagonism of B cell enhancer networks by STAT5 drives leukemia and poor patient survival
Katerndahl CDS, Heltemes-Harris LM, Willette MJL, Henzler CM, Frietze S, Yang R, Schjerven H, Silverstein KAT, Ramsey LB, Hubbard G, Wells AD, Kuiper RP, Scheijen B, van Leeuwen FN, Müschen M, Kornblau SM, Farrar MA. Antagonism of B cell enhancer networks by STAT5 drives leukemia and poor patient survival. Nature Immunology 2017, 18: 694-704. PMID: 28369050, PMCID: PMC5540372, DOI: 10.1038/ni.3716.Peer-Reviewed Original ResearchAdaptor Proteins, Signal TransducingAgammaglobulinaemia Tyrosine KinaseAnimalsB-LymphocytesChromatin ImmunoprecipitationFlow CytometryGene Expression Regulation, NeoplasticHumansIkaros Transcription FactorInterferon Regulatory FactorsMiceMultiplex Polymerase Chain ReactionNF-kappa B p50 SubunitPAX5 Transcription FactorPre-B Cell ReceptorsPrecursor Cell Lymphoblastic Leukemia-LymphomaPrognosisProtein Kinase C betaProtein-Tyrosine KinasesProto-Oncogene ProteinsReal-Time Polymerase Chain ReactionSignal TransductionSTAT5 Transcription FactorSurvival RateTrans-Activators
2015
Erk Negative Feedback Control Enables Pre-B Cell Transformation and Represents a Therapeutic Target in Acute Lymphoblastic Leukemia
Shojaee S, Caeser R, Buchner M, Park E, Swaminathan S, Hurtz C, Geng H, Chan LN, Klemm L, Hofmann WK, Qiu YH, Zhang N, Coombes KR, Paietta E, Molkentin J, Koeffler HP, Willman CL, Hunger SP, Melnick A, Kornblau SM, Müschen M. Erk Negative Feedback Control Enables Pre-B Cell Transformation and Represents a Therapeutic Target in Acute Lymphoblastic Leukemia. Cancer Cell 2015, 28: 114-128. PMID: 26073130, PMCID: PMC4565502, DOI: 10.1016/j.ccell.2015.05.008.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsAntineoplastic AgentsCell Transformation, NeoplasticDNA-Binding ProteinsDual Specificity Phosphatase 6Host Cell Factor C1HumansIntracellular Signaling Peptides and ProteinsMAP Kinase Signaling SystemMembrane ProteinsMiceMice, TransgenicMolecular Sequence DataPrecursor Cell Lymphoblastic Leukemia-LymphomaPrognosisProtein Serine-Threonine KinasesSmall Molecule LibrariesTranscription FactorsConceptsAcute lymphoblastic leukemiaLymphoblastic leukemiaPatient-derived preNegative feedback regulationPre-B cell cloneCell deathImmediate cell deathMouse modelSmall molecule inhibitorsTherapeutic targetAcute activationMalignant transformationCell clonesFeedback regulationOncogenic signalingMolecule inhibitorsStrong activationLeukemiaDeathERKPre-B-cell transformationCell transformationActivationOncogenic transformationVast majorityMechanisms of clonal evolution in childhood acute lymphoblastic leukemia
Swaminathan S, Klemm L, Park E, Papaemmanuil E, Ford A, Kweon SM, Trageser D, Hasselfeld B, Henke N, Mooster J, Geng H, Schwarz K, Kogan SC, Casellas R, Schatz DG, Lieber MR, Greaves MF, Müschen M. Mechanisms of clonal evolution in childhood acute lymphoblastic leukemia. Nature Immunology 2015, 16: 766-774. PMID: 25985233, PMCID: PMC4475638, DOI: 10.1038/ni.3160.Peer-Reviewed Original ResearchMeSH KeywordsAdolescentAnimalsAntibody DiversityB-LymphocytesChildChild, PreschoolClonal EvolutionCytidine DeaminaseDNA-Binding ProteinsFemaleFlow CytometryHomeodomain ProteinsHumansImmunoblottingInfantMaleMice, Inbred NODMice, KnockoutMice, SCIDMice, TransgenicMicroscopy, FluorescencePrecursor Cell Lymphoblastic Leukemia-LymphomaPrecursor Cells, B-LymphoidReverse Transcriptase Polymerase Chain ReactionTumor Cells, CulturedSignalling thresholds and negative B-cell selection in acute lymphoblastic leukaemia
Chen Z, Shojaee S, Buchner M, Geng H, Lee JW, Klemm L, Titz B, Graeber TG, Park E, Tan YX, Satterthwaite A, Paietta E, Hunger SP, Willman CL, Melnick A, Loh ML, Jung JU, Coligan JE, Bolland S, Mak TW, Limnander A, Jumaa H, Reth M, Weiss A, Lowell CA, Müschen M. Signalling thresholds and negative B-cell selection in acute lymphoblastic leukaemia. Nature 2015, 521: 357-361. PMID: 25799995, PMCID: PMC4441554, DOI: 10.1038/nature14231.Peer-Reviewed Original ResearchMeSH KeywordsAmino Acid MotifsAnimalsAntigens, CDB-LymphocytesCell DeathCell Line, TumorCell Transformation, NeoplasticDisease Models, AnimalDrug Resistance, NeoplasmEnzyme ActivationFemaleFusion Proteins, bcr-ablGene DeletionHumansInositol Polyphosphate 5-PhosphatasesIntracellular Signaling Peptides and ProteinsMiceMice, Inbred NODMice, SCIDPhosphatidylinositol-3,4,5-Trisphosphate 5-PhosphatasesPhosphoric Monoester HydrolasesPlatelet Endothelial Cell Adhesion Molecule-1Precursor Cell Lymphoblastic Leukemia-LymphomaPrecursor Cells, B-LymphoidProtein Tyrosine Phosphatase, Non-Receptor Type 6Protein-Tyrosine KinasesReceptors, Antigen, B-CellReceptors, ImmunologicSignal TransductionSyk KinaseTyrosineXenograft Model Antitumor AssaysIdentification of FOXM1 as a therapeutic target in B-cell lineage acute lymphoblastic leukaemia
Buchner M, Park E, Geng H, Klemm L, Flach J, Passegué E, Schjerven H, Melnick A, Paietta E, Kopanja D, Raychaudhuri P, Müschen M. Identification of FOXM1 as a therapeutic target in B-cell lineage acute lymphoblastic leukaemia. Nature Communications 2015, 6: 6471. PMID: 25753524, PMCID: PMC4366523, DOI: 10.1038/ncomms7471.Peer-Reviewed Original ResearchMeSH KeywordsAdultAnimalsAntineoplastic AgentsB-LymphocytesCell ProliferationCell SurvivalChildClinical Trials as TopicCyclin-Dependent Kinase Inhibitor p16Drug Resistance, NeoplasmForkhead Box Protein M1Forkhead Box Protein O3Forkhead Transcription FactorsGene Expression Regulation, LeukemicHumansMicePeptidesPrecursor Cell Lymphoblastic Leukemia-LymphomaSignal TransductionSurvival AnalysisThiostreptonXenograft Model Antitumor AssaysConceptsAcute lymphoblastic leukemiaLymphoblastic leukemiaTherapeutic targetB-cell lineage acute lymphoblastic leukemiaFOXM1 levelsAggressive clinical coursePre-B cell receptor checkpointNovel therapeutic targetB cell populationsNormal B cell populationsClinical coursePoor outcomeCure rateNormal B cell developmentFOXM1 inhibitionB cell developmentDrug resistanceFoxm1 deletionFOXM1Colony formationPatientsLeukemiaCell survivalPrognosisTranscriptional inactivationSelf-Enforcing Feedback Activation between BCL6 and Pre-B Cell Receptor Signaling Defines a Distinct Subtype of Acute Lymphoblastic Leukemia
Geng H, Hurtz C, Lenz KB, Chen Z, Baumjohann D, Thompson S, Goloviznina NA, Chen WY, Huan J, LaTocha D, Ballabio E, Xiao G, Lee JW, Deucher A, Qi Z, Park E, Huang C, Nahar R, Kweon SM, Shojaee S, Chan LN, Yu J, Kornblau SM, Bijl JJ, Ye BH, Ansel KM, Paietta E, Melnick A, Hunger SP, Kurre P, Tyner JW, Loh ML, Roeder RG, Druker BJ, Burger JA, Milne TA, Chang BH, Müschen M. Self-Enforcing Feedback Activation between BCL6 and Pre-B Cell Receptor Signaling Defines a Distinct Subtype of Acute Lymphoblastic Leukemia. Cancer Cell 2015, 27: 409-425. PMID: 25759025, PMCID: PMC4618684, DOI: 10.1016/j.ccell.2015.02.003.Peer-Reviewed Original ResearchMeSH KeywordsBasic Helix-Loop-Helix Transcription FactorsClinical Trials as TopicDNA-Binding ProteinsGene Expression Regulation, NeoplasticHumansIntracellular Signaling Peptides and ProteinsMolecular Sequence DataPhosphatidylinositol 3-KinasePre-B-Cell Leukemia Transcription Factor 1Precursor Cell Lymphoblastic Leukemia-LymphomaPrecursor Cells, B-LymphoidProtein-Tyrosine KinasesProto-Oncogene ProteinsProto-Oncogene Proteins c-bcl-6Signal TransductionSrc-Family KinasesSyk KinaseUp-RegulationConceptsDistinct subtypesPre-BCR signalingPatient-derived preVivo treatment studiesTreatment of patientsAcute lymphoblastic leukemiaTyrosine kinase inhibitorsPre-B cell receptor signalingCell receptor signalingLymphoblastic leukemiaClinical trialsTreatment studiesPre-BCR functionReceptor signalingKinase inhibitorsDistinct subsetsBCL6 expressionInduced activationFeedback activationSubtypesTyrosine kinaseBCL6SignalingActivationTranscriptional level
2013
BACH2 mediates negative selection and p53-dependent tumor suppression at the pre-B cell receptor checkpoint
Swaminathan S, Huang C, Geng H, Chen Z, Harvey R, Kang H, Ng C, Titz B, Hurtz C, Sadiyah MF, Nowak D, Thoennissen GB, Rand V, Graeber TG, Koeffler HP, Carroll WL, Willman CL, Hall AG, Igarashi K, Melnick A, Müschen M. BACH2 mediates negative selection and p53-dependent tumor suppression at the pre-B cell receptor checkpoint. Nature Medicine 2013, 19: 1014-1022. PMID: 23852341, PMCID: PMC3954721, DOI: 10.1038/nm.3247.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsBasic-Leucine Zipper Transcription FactorsCell DeathCell DifferentiationCell SurvivalCell Transformation, NeoplasticDNA-Binding ProteinsGene DeletionGene Expression Regulation, LeukemicGreen Fluorescent ProteinsImmunoglobulin mu-ChainsMiceMolecular Sequence DataPAX5 Transcription FactorPre-B Cell ReceptorsPrecursor Cell Lymphoblastic Leukemia-LymphomaPrecursor Cells, B-LymphoidProto-Oncogene Proteins c-bcl-6Proto-Oncogene Proteins c-mycRNA, MessengerSTAT5 Transcription FactorTreatment OutcomeTumor Suppressor Protein p53V(D)J Recombination
2011
BCL6 enables Ph+ acute lymphoblastic leukaemia cells to survive BCR–ABL1 kinase inhibition
Duy C, Hurtz C, Shojaee S, Cerchietti L, Geng H, Swaminathan S, Klemm L, Kweon SM, Nahar R, Braig M, Park E, Kim YM, Hofmann WK, Herzog S, Jumaa H, Koeffler HP, Yu JJ, Heisterkamp N, Graeber TG, Wu H, Ye BH, Melnick A, Müschen M. BCL6 enables Ph+ acute lymphoblastic leukaemia cells to survive BCR–ABL1 kinase inhibition. Nature 2011, 473: 384-388. PMID: 21593872, PMCID: PMC3597744, DOI: 10.1038/nature09883.Peer-Reviewed Original ResearchMeSH KeywordsADP-Ribosylation Factor 1AnimalsCell SurvivalDNA-Binding ProteinsDrug Resistance, NeoplasmFusion Proteins, bcr-ablGene Expression Regulation, NeoplasticHumansMiceMice, Inbred NODMice, SCIDPrecursor Cell Lymphoblastic Leukemia-LymphomaProtein Kinase InhibitorsProto-Oncogene Proteins c-bcl-6Transcription, GeneticTumor Suppressor Protein p53ConceptsTyrosine kinase inhibitorsAcute lymphoblastic leukemia cellsBCR-ABL1 mutationsLymphoblastic leukemia cellsDrug resistanceLeukemia cellsLeukemia-initiating cellsXenograft modelBCR-ABL1Anticancer responseTargeted inhibitionDual inhibitionKinase inhibitorsOncogene withdrawalCancer therapyBCL6Kinase inhibitionLeukemiaInhibitionCellsTherapyMutationsUpregulation
2010
Development of resistance to dasatinib in Bcr/Abl-positive acute lymphoblastic leukemia
Fei F, Stoddart S, Müschen M, Kim Y, Groffen J, Heisterkamp N. Development of resistance to dasatinib in Bcr/Abl-positive acute lymphoblastic leukemia. Leukemia 2010, 24: 813-820. PMID: 20111071, PMCID: PMC3038787, DOI: 10.1038/leu.2009.302.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsApoptosisBlotting, WesternCells, CulturedDasatinibDrug Resistance, NeoplasmEmbryo, MammalianFibroblastsFusion Proteins, bcr-ablHumansLeukemia, ExperimentalMiceMice, Inbred NODMice, KnockoutMice, SCIDPhosphorylationPrecursor Cell Lymphoblastic Leukemia-LymphomaProtein Kinase InhibitorsProtein-Tyrosine KinasesPyrimidinesReceptors, CXCR4Src-Family KinasesStromal CellsThiazolesConceptsLong-term treatmentBcr/Abl-positive acute lymphoblastic leukemiaPhiladelphia chromosome-positive leukemiaAcute lymphoblastic leukemia cellsLeukemia cellsTreatment of miceAcute lymphoblastic leukemiaEffects of dasatinibLymphoblastic leukemia cellsTyrosine kinase inhibitionDrug-resistant cellsHigh-dose pulseBCR/ABLDasatinib monotherapyDaily doseDevelopment of resistanceDasatinib treatmentLymphoblastic leukemiaB lineage cellsCell surface expressionCXCR4 inhibitorsEnhanced cell deathLow doseLow dosesDasatinib
2007
Activation-induced cytidine deaminase acts as a mutator in BCR-ABL1–transformed acute lymphoblastic leukemia cells
Feldhahn N, Henke N, Melchior K, Duy C, Soh BN, Klein F, von Levetzow G, Giebel B, Li A, Hofmann WK, Jumaa H, Müschen M. Activation-induced cytidine deaminase acts as a mutator in BCR-ABL1–transformed acute lymphoblastic leukemia cells. Journal Of Experimental Medicine 2007, 204: 1157-1166. PMID: 17485517, PMCID: PMC2118573, DOI: 10.1084/jem.20062662.Peer-Reviewed Original ResearchMeSH KeywordsBase SequenceBlotting, WesternB-LymphocytesCytidine DeaminaseDNA Mutational AnalysisDNA-Binding ProteinsFlow CytometryFusion Proteins, bcr-ablGene Expression Regulation, NeoplasticGenes, mycHumansImmunoglobulin Variable RegionMolecular Sequence DataMutationOligonucleotide Array Sequence AnalysisOligonucleotidesPhiladelphia ChromosomePrecursor Cell Lymphoblastic Leukemia-LymphomaProtein-Tyrosine KinasesProto-Oncogene Proteins c-bcl-6Reverse Transcriptase Polymerase Chain ReactionRNA InterferenceSequence AlignmentConceptsAcute lymphoblastic leukemiaBCR-ABL1BCR-ABL1 kinaseUnfavorable prognosisActivation-induced cytidine deaminaseAcute lymphoblastic leukemia cellsAID expressionAberrant AID expressionBCR-ABL1 kinase activityIgH V region genesTumor suppressor gene CDKN2BGerminal center B cellsLymphoblastic leukemia cellsB cell precursorsImmunoglobulin heavy chain variable region genesLymphoblastic leukemiaLeukemia subsetsB cellsDNA single-strand breaksPH casesPhiladelphia chromosomeHeavy chain variable region genesAberrant expressionCell precursorsChain variable region genes
2005
Mimicry of a constitutively active pre–B cell receptor in acute lymphoblastic leukemia cells
Feldhahn N, Klein F, Mooster JL, Hadweh P, Sprangers M, Wartenberg M, Bekhite MM, Hofmann WK, Herzog S, Jumaa H, Rowley JD, Müschen M. Mimicry of a constitutively active pre–B cell receptor in acute lymphoblastic leukemia cells. Journal Of Experimental Medicine 2005, 201: 1837-1852. PMID: 15939795, PMCID: PMC2213268, DOI: 10.1084/jem.20042101.Peer-Reviewed Original ResearchMeSH KeywordsAdolescentAdultAgedCalcium SignalingCell Line, TumorCell SurvivalChildChild, PreschoolFemaleGene Expression Regulation, LeukemicHumansMaleMembrane GlycoproteinsMiddle AgedMolecular MimicryPre-B Cell ReceptorsPrecursor Cell Lymphoblastic Leukemia-LymphomaProtein-Tyrosine KinasesReceptors, Antigen, B-CellConceptsBruton's tyrosine kinaseBCR-ABL1Pre-B cell receptorCell receptorFull‐length Bruton tyrosine kinaseSurvival signalsAcute lymphoblastic leukemia cellsLeukemia cellsBCR-ABL1 kinase activityLymphoblastic leukemia cellsDownstream survival signalsBCR-ABL1 kinaseTyrosine kinaseCell receptor engagementKinase activityBypass selectionSTAT5 phosphorylationSrc homology domain 3BTK activityReceptorsAutonomous Ca2Receptor engagementSimilar extentActivation of PLCgamma1Dependent activation