Treatment of drug-resistant human neuroblastoma cells with cyclodextrin inclusion complexes of aphidicolin.
Treatment failure in most neuroblastoma (NB) patients is related to primary and/or acquired resistance to conventional chemotherapeutic agents. Aphidicolin (APH), a tetracyclic diterpene, exhibits specific cytotoxic action against NB cells. The purpose of this study was to compare antitumoral efficacy of APH in parental NB cell lines and cell subclones that exhibit drug resistance to vincristine (VCR), doxorubicin (DOX) and cisplatin. Due to poor solubility of APH in water, gamma-cyclodextrin (gamma-CD) inclusion complexes of APH were used for systemic treatment of xenotransplanted parental and VCR-resistant UKF-NB-3 tumours. APH and its gamma-CD inclusion complexes inhibited growth of parental and drug-resistant NB cells at equimolar doses in vitro. Growth of VCR-sensitive and -resistant NB tumors was inhibited at equal doses in a dose-dependent fashion in vivo. These results indicate that the specific cytotoxic activity of APH against NB cells in vitro and in vivo is independent of cellular mechanisms facilitating drug resistance to conventional chemotherapeutic drugs. Hence, taking into account our previous findings that APH acts synergistically with VCR and DOX, APH might be an additive tool for the therapy of NB and is suitable for evaluation in clinical studies of NB treatment protocols.
Michaelis
M
M
Institut für Medizinische Virologie, Zentrum der Hygiene, Klinikum der JW Goethe-Universität, Paul-Ehrlich-Strasse 40, 60596 Frankfurt am Main, Germany.
Cinatl
J
J
Vogel
J U
JU
Pouckova
P
P
Driever
P H
PH
Cinatl
J
J
D000818:Animals; D000970:Antineoplastic Agents / Q000627:therapeutic use; D016590:Aphidicolin / Q000031:analogs & derivatives / Q000627:therapeutic use*; D001835:Body Weight / Q000187:drug effects; D002470:Cell Survival / Q000187:drug effects*; D003505:Cyclodextrins / Q000494:pharmacology*; D004337:Drug Carriers; D019008:Drug Resistance, Neoplasm; D004791:Enzyme Inhibitors / Q000627:therapeutic use*; D005260:Female; D006801:Humans; D051379:Mice; D008819:Mice, Nude; D009447:Neuroblastoma / Q000188:drug therapy* / Q000473:pathology; D014407:Tumor Cells, Cultured / Q000187:drug effects* / Q000473:pathology
D000970:Antineoplastic Agents; D003505:Cyclodextrins; D004337:Drug Carriers; D004791:Enzyme Inhibitors; D016590:Aphidicolin