title: The heat shock protein 90 inhibitor 17-AAG induces cell cycle arrest and apoptosis in mantle cell lymphoma cell lines by depleting cyclin D1, Akt, Bid and activating caspase 9.
abstract: Mantle cell lymphoma (MCL), a distinct type of non-Hodgkin lymphoma, is characterised by the overexpression of cyclin D1. Heat shock protein 90 (HSP90) is a molecular chaperon to proteins that regulate cell cycle and survival. 17-allylamino-17-demethoxy-geldanamycin (17-AAG), a HSP90 small molecule inhibitor, induced G(0/1) cell cycle arrest and cell death in a dose- and time-dependent manner in MCL cell lines. This effect was associated with the downregulation of cyclin D1, cdk4 and Akt, depletion of Bid, and activation of the intrinsic/mitochondrial caspase pathway. These data suggest that 17-AAG may have a potential therapeutic value in patients with MCL.
authors.affiliation: Department of Lymphoma and Myeloma, The University of Texas, MD Anderson Cancer Center (MDACC), Houston, TX, USA.
authors.forename: Georgios V
authors.initials: GV
authors.lastname: Georgakis
authors.forename: Yang
authors.initials: Y
authors.lastname: Li
authors.forename: Anas
authors.initials: A
authors.lastname: Younes
mesh_terms: D000970:Antineoplastic Agents / Q000494:pharmacology*; D017209:Apoptosis / Q000187:drug effects; D051023:BH3 Interacting Domain Death Agonist Protein / Q000378:metabolism; D016227:Benzoquinones / Q000494:pharmacology*; D053453:Caspase 9; D020169:Caspases / Q000378:metabolism; D002453:Cell Cycle / Q000187:drug effects; D019938:Cyclin D1 / Q000378:metabolism; D015536:Down-Regulation / Q000187:drug effects; D004353:Drug Evaluation, Preclinical; D004789:Enzyme Activation / Q000187:drug effects; D015972:Gene Expression Regulation, Neoplastic / Q000187:drug effects; D018841:HSP90 Heat-Shock Proteins / Q000037:antagonists & inhibitors*; D006801:Humans; D047029:Lactams, Macrocyclic / Q000494:pharmacology*; D020522:Lymphoma, Mantle-Cell / Q000235:genetics / Q000378:metabolism / Q000473:pathology*; D009363:Neoplasm Proteins / Q000235:genetics / Q000378:metabolism*; D051057:Proto-Oncogene Proteins c-akt / Q000378:metabolism; D014407:Tumor Cells, Cultured
chemical_list: D000970:Antineoplastic Agents; D051023:BH3 Interacting Domain Death Agonist Protein; C494814:BID protein, human; D016227:Benzoquinones; D018841:HSP90 Heat-Shock Proteins; D047029:Lactams, Macrocyclic; D009363:Neoplasm Proteins; D019938:Cyclin D1; C112765:tanespimycin; D051057:Proto-Oncogene Proteins c-akt; C506433:CASP9 protein, human; D053453:Caspase 9; D020169:Caspases