2017
BRD4 Proteolysis Targeting Chimera (PROTAC) ARV-825 Targets Both NOTCH1-MYC Regulatory Circuit and Leukemia-Microenvironment in T-ALL
Piya S, Mu H, Bhattacharya S, McQueen T, Davis R, Ruvolo V, Baran N, Qian Y, Raina K, Crews C, You M, McKay P, Konopleva M, Kantarjian H, Andreeff M, Borthakur G. BRD4 Proteolysis Targeting Chimera (PROTAC) ARV-825 Targets Both NOTCH1-MYC Regulatory Circuit and Leukemia-Microenvironment in T-ALL. Blood 2017, 130: 716. DOI: 10.1182/blood.v130.suppl_1.716.716.Peer-Reviewed Original ResearchT-cell acute lymphoblastic leukemiaAcute lymphoblastic leukemiaLymphoblastic leukemiaARV-825PI3K/AktGamma-secretase inhibitorsMouse modelRelapsed T-cell acute lymphoblastic leukemiaVehicle-treated control micePatient-derived xenograft mouse modelsCell linesLow leukemia burdenCell acute lymphoblastic leukemiaReactive oxygen speciesT-cell lymphoblastic leukemiaAnti-leukemic effectsXenograft mouse modelLeukemia-stroma interactionsPDX mouse modelsBristol-Meyers SquibbG1/S cell cycle progressionPersistence of diseaseAttractive therapeutic targetIntra-cellular reactive oxygen speciesMicroenvironmental signalsBET protein proteolysis targeting chimera (PROTAC) exerts potent lethal activity against mantle cell lymphoma cells
Sun B, Fiskus W, Qian Y, Rajapakshe K, Raina K, Coleman KG, Crew AP, Shen A, Saenz DT, Mill CP, Nowak AJ, Jain N, Zhang L, Wang M, Khoury JD, Coarfa C, Crews CM, Bhalla KN. BET protein proteolysis targeting chimera (PROTAC) exerts potent lethal activity against mantle cell lymphoma cells. Leukemia 2017, 32: 343-352. PMID: 28663582, DOI: 10.1038/leu.2017.207.Peer-Reviewed Original ResearchConceptsMantle cell lymphoma cellsMCL cellsCell lymphoma cellsARV-825ARV-771Lymphoma cellsGreater survival improvementSuperior preclinical activityCDK4/6 inhibitor palbociclibNuclear factor-κB (NF-κB) target genesExtraterminal protein inhibitorSurvival improvementInhibitor palbociclibPreclinical activityCDKN1A/p21Inhibitor treatmentSuperior pharmacological propertiesVivo growthCyclin D1Pharmacological propertiesProtein expressionMore apoptosisVivo evaluationIncomplete inhibitionC-MycNovel BET protein proteolysis-targeting chimera exerts superior lethal activity than bromodomain inhibitor (BETi) against post-myeloproliferative neoplasm secondary (s) AML cells
Saenz DT, Fiskus W, Qian Y, Manshouri T, Rajapakshe K, Raina K, Coleman KG, Crew AP, Shen A, Mill CP, Sun B, Qiu P, Kadia TM, Pemmaraju N, DiNardo C, Kim MS, Nowak AJ, Coarfa C, Crews CM, Verstovsek S, Bhalla KN. Novel BET protein proteolysis-targeting chimera exerts superior lethal activity than bromodomain inhibitor (BETi) against post-myeloproliferative neoplasm secondary (s) AML cells. Leukemia 2017, 31: 1951-1961. PMID: 28042144, PMCID: PMC5537055, DOI: 10.1038/leu.2016.393.Peer-Reviewed Original ResearchConceptsBET protein inhibitorARV-825Messenger RNAReverse phase protein arrayPhase protein arrayRNA-seqHematopoietic progenitor cellsNormal hematopoietic progenitor cellsBET proteinsE3 ubiquitin ligase cereblonLevels of p21Extraterminal (BET) proteinsBcl-xLBromodomain inhibitorsC-MycJAK inhibitor ruxolitinibBRD4Protein arraysProgenitor cellsProtein expressionHEL92.1.7 cellsImproved survivalLeukemia burdenNSG miceProfound depletion
2016
Novel BET Protein Proteolysis Targeting Chimeras (BETP-PROTACs) Exert Potent Single Agent and Synergistic Activity with Ibrutinib and Venetoclax Against Human Mantle Cell Lymphoma Cells
Sun B, Fiskus W, Zhang L, Raina K, Coleman K, Winkler J, Qian Y, Crew A, Shen A, Saenz D, Mill C, Wang M, Crews C, Bhalla K. Novel BET Protein Proteolysis Targeting Chimeras (BETP-PROTACs) Exert Potent Single Agent and Synergistic Activity with Ibrutinib and Venetoclax Against Human Mantle Cell Lymphoma Cells. Blood 2016, 128: 1058. DOI: 10.1182/blood.v128.22.1058.1058.Peer-Reviewed Original ResearchTarget gene expressionBruton's tyrosine kinaseC-MycARV-825Transcription factorsPrimary MCL cellsTranscriptional activityGene expressionTyrosine kinaseBcl-xLE3 ubiquitin ligase activityMCL cellsUbiquitin ligase activityHuman mantle cell lymphoma cellsB-cell receptor signalingCell receptor signalingBinding of BRD4Regulation of mRNAInk4a/ArfAcetylated chromatinCopy number gainsLigase activityHematopoietic progenitor cellsBET proteinsBETi treatmentSuperior Lethal Activity of Novel BET Protein Proteolysis Targeting Chimera (BETP-PROTACs) Versus Betp Bromodomain Inhibitor (BETi) Against Post-Myeloproliferative Neoplasm (MPN) Secondary (s) AML Cells
Saenz D, Fiskus W, Raina K, Manshouri T, Coleman K, Winkler J, Qian Y, Crew A, Shen A, Mill C, Sun B, Verstovsek S, Crews C, Bhalla K. Superior Lethal Activity of Novel BET Protein Proteolysis Targeting Chimera (BETP-PROTACs) Versus Betp Bromodomain Inhibitor (BETi) Against Post-Myeloproliferative Neoplasm (MPN) Secondary (s) AML Cells. Blood 2016, 128: 747. DOI: 10.1182/blood.v128.22.747.747.Peer-Reviewed Original ResearchTyk2 tyrosine kinaseMPN-MFARV-825Stem/progenitor cellsHEL92.1.7 cellsHematopoietic stem/progenitor cellsProgenitor cellsC-MycP-STAT5ARV-771BETi treatmentMass cytometry approachProtein expressionLoss of responseNormal hematopoietic progenitor cellsNotable clinical benefitJAK-STATProtein array analysisNegative myeloproliferative neoplasmsBcl-xLMedian survivalClinical outcomesClinical benefitHematopoietic progenitor cellsWestern analysisBRD4 Proteolysis Targeting Chimera (PROTAC) ARV-825, Causes Sustained Degradation of BRD4 and Modulation of Chemokine Receptors, Cell Adhesion and Metabolic Targets in Leukemia Resulting in Profound Anti-Leukemic Effects
Piya S, Bhattacharya S, Mu H, Lorenzi P, McQueen T, Davis E, Ruvolo V, Baran N, Qian Y, Crews C, Kantarjian H, Andreeff M, Borthakur G. BRD4 Proteolysis Targeting Chimera (PROTAC) ARV-825, Causes Sustained Degradation of BRD4 and Modulation of Chemokine Receptors, Cell Adhesion and Metabolic Targets in Leukemia Resulting in Profound Anti-Leukemic Effects. Blood 2016, 128: 748. DOI: 10.1182/blood.v128.22.748.748.Peer-Reviewed Original ResearchProteolysis Targeting ChimerasARV-825Cell adhesionExtra-terminal domain (BET) familyOverexpression of PIM1Amino acid transportersDegradation of BRD4Production of ATPGene expression profilingMesenchymal stromal cellsCell linesImportant amino acidsTranscription of oncogenesBcl-2 family moleculesStroma-mediated drug resistanceWnt/β-catenin pathwayNutrient acquisitionRegulatory machineryFlow cytometryEnhancer complexTranscriptional coactivatorSmall-molecule BRD4 inhibitorsDomain familyEpigenetic eventsProteomic analysis