title: Antagonistic effects of sequential administration of BL1521, a histone deacetylase inhibitor, and gemcitabine to neuroblastoma cells.
abstract: Additive to synergistic induction of apoptosis has been reported as a result of sequential incubation of cancer cells with a histone deacetylase inhibitor (HDACi) and gemcitabine (dFdC), a deoxycytidine analogue with proven anti-tumour activity. This study shows that sequential treatment of two neuroblastoma cell lines with BL1521, an HDACi, and dFdC resulted in strong antagonism despite a minor increase of dFdCTP incorporation into the DNA of one cell line. Furthermore, no difference in the deoxycytidine kinase activity was observed in response to BL1521. In conclusion, cancer cells that respond to HDACi with a cell cycle arrest and differentiation may no longer be sensitive to dFdC.
authors.affiliation: Laboratory Genetic Metabolic Diseases, Department of Paediatrics/Emma Children's Hospital and Clinical Chemistry, Academic Medical Centre, University of Amsterdam, P.O. Box 22700, 1100 DE Amsterdam, The Netherlands.
authors.forename: Annemieke J M
authors.initials: AJ
authors.lastname: de Ruijter
authors.forename: René
authors.initials: R
authors.lastname: Leen
authors.forename: Jerry
authors.initials: J
authors.lastname: Hoebink
authors.forename: Huib N
authors.initials: HN
authors.lastname: Caron
authors.forename: André B P
authors.initials: AB
authors.lastname: van Kuilenburg
mesh_terms: D000964:Antimetabolites, Antineoplastic / Q000008:administration & dosage* / Q000494:pharmacology; D002453:Cell Cycle / Q000187:drug effects; D002454:Cell Differentiation / Q000187:drug effects; D003841:Deoxycytidine / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000494:pharmacology; D004338:Drug Combinations; D004791:Enzyme Inhibitors / Q000008:administration & dosage* / Q000494:pharmacology; D056572:Histone Deacetylase Inhibitors; D006801:Humans; D006877:Hydroxamic Acids / Q000008:administration & dosage* / Q000494:pharmacology; D009447:Neuroblastoma / Q000188:drug therapy* / Q000201:enzymology; D014407:Tumor Cells, Cultured; D000093542:Gemcitabine
chemical_list: D000964:Antimetabolites, Antineoplastic; C492810:BL1521; D004338:Drug Combinations; D004791:Enzyme Inhibitors; D056572:Histone Deacetylase Inhibitors; D006877:Hydroxamic Acids; D003841:Deoxycytidine; D000093542:Gemcitabine