title: Synergistic antiproliferative effect of arsenic trioxide combined with bortezomib in HL60 cell line and primary blasts from patients affected by myeloproliferative disorders.
abstract: Both arsenic trioxide (ATO) and bortezomib show separate antileukemic activity. With the purpose of evaluating whether the combination of ATO and bortezomib would be an option for patients with acute leukemia, we incubated HL60 leukemic cells with ATO alone and in combination with bortezomib. ATO and bortezomib cooperated to induce cell death and to inhibit proliferation and apoptosis in a synergistic way. The combined treatment resulted in a stronger activation of caspase 8 and 9, moderate activation of caspase 3, and increased expression of Fas and tumor necrosis factor-related apoptosis-inducing ligand (TRAIL)-DR5 receptors. When bortezomib was added, some proapoptotic genes (CARD9, TRAIL) were upregulated, and some antiapoptotic genes (BCL2, BCL3, FLICE) were downregulated. When coincubated, approximately 80% of cells showed altered mitochondrial membrane permeability. Moreover, ATO alone and in combination with bortezomib abrogated DNA-binding activity of nuclear factor kappa beta (NF-kappaB). Gene expression assays showed that more deregulated genes were related to proliferation of leukocytes, tumorigenesis, control of cell cycle, hypoxia and oxidative stress, cytokines, PI3K-AKT, ERK-MAPK, EGF pathways, and ubiquitination. Finally, in three cases of acute myeloid leukemia, the addition of bortezomib to ATO significantly increased cytotoxicity. We conclude that the combination of bortezomib and ATO may be efficacious in the treatment of myeloid disorders.
authors.affiliation: Department of Oncology, Transplant and Advances in Medicine, Section of Hematology, University of Pisa, Ospedale S. Chiara, Via Roma, 67, 56126 Pisa, Italy.
authors.forename: Martina
authors.initials: M
authors.lastname: Canestraro
authors.forename: Sara
authors.initials: S
authors.lastname: Galimberti
authors.forename: Hakan
authors.initials: H
authors.lastname: Savli
authors.forename: Giuseppe Alberto
authors.initials: GA
authors.lastname: Palumbo
authors.forename: Daniele
authors.initials: D
authors.lastname: Tibullo
authors.forename: Balint
authors.initials: B
authors.lastname: Nagy
authors.forename: Francesca
authors.initials: F
authors.lastname: Guerrini
authors.forename: Simona
authors.initials: S
authors.lastname: Piaggi
authors.forename: Naci
authors.initials: N
authors.lastname: Cine
authors.forename: Maria Rita
authors.initials: MR
authors.lastname: Metelli
authors.forename: Mario
authors.initials: M
authors.lastname: Petrini
mesh_terms: D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use*; D017209:Apoptosis / Q000187:drug effects*; D000077237:Arsenic Trioxide; D001152:Arsenicals / Q000008:administration & dosage; D014408:Biomarkers, Tumor / Q000235:genetics / Q000378:metabolism; D001752:Blast Crisis; D015153:Blotting, Western; D001897:Boronic Acids / Q000008:administration & dosage; D000069286:Bortezomib; D053181:Caspase 8 / Q000235:genetics / Q000378:metabolism; D002453:Cell Cycle / Q000187:drug effects; D049109:Cell Proliferation / Q000187:drug effects; D004357:Drug Synergism; D020869:Gene Expression Profiling; D018922:HL-60 Cells / Q000187:drug effects; D006801:Humans; D015470:Leukemia, Myeloid, Acute / Q000188:drug therapy* / Q000378:metabolism / Q000473:pathology; D009196:Myeloproliferative Disorders / Q000188:drug therapy* / Q000378:metabolism / Q000473:pathology; D016328:NF-kappa B / Q000235:genetics / Q000378:metabolism; D020411:Oligonucleotide Array Sequence Analysis; D010087:Oxides / Q000008:administration & dosage; D051057:Proto-Oncogene Proteins c-akt / Q000235:genetics / Q000378:metabolism; D019253:Proto-Oncogene Proteins c-bcl-2 / Q000378:metabolism; D011719:Pyrazines / Q000008:administration & dosage; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D017382:Reactive Oxygen Species / Q000378:metabolism; D053220:Receptors, TNF-Related Apoptosis-Inducing Ligand / Q000235:genetics / Q000378:metabolism; D020133:Reverse Transcriptase Polymerase Chain Reaction; D053221:TNF-Related Apoptosis-Inducing Ligand / Q000235:genetics / Q000378:metabolism
chemical_list: D001152:Arsenicals; D014408:Biomarkers, Tumor; D001897:Boronic Acids; D016328:NF-kappa B; D010087:Oxides; D019253:Proto-Oncogene Proteins c-bcl-2; D011719:Pyrazines; D012333:RNA, Messenger; D017382:Reactive Oxygen Species; D053220:Receptors, TNF-Related Apoptosis-Inducing Ligand; D053221:TNF-Related Apoptosis-Inducing Ligand; D000069286:Bortezomib; D051057:Proto-Oncogene Proteins c-akt; D053181:Caspase 8; D000077237:Arsenic Trioxide