title: Activity of bortezomib in glioblastoma.
abstract: BACKGROUND
  Chemotherapy is the commonly accepted standard therapy for most types of brain tumor, especially in medulloblastoma, primitive neuroectodermal tumor and astrocytoma. However, no efficient therapy has been established to date for glioblastoma multiforme. The aim of the present study was to analyze the activity of bortezomib in glioblastoma cell lines in comparison with that in a pediatric acute lymphoblastic leukemia cell line.
  
  
  METHODS
  Glioblastoma multiforme T98G, glioblastoma-astrocytoma U373M and T-lineage acute lymphoblastic leukemia CCRF-CEM cell lines were used. Proteasome inhibitor, bortezomib and 14 other anticancer drugs were tested using the MTT assay.
  
  
  RESULTS
  Compared to the acute lymphoblastic cell line, both glioblastoma cell lines showed relatively good sensitivity to bortezomib, as well as to cisplatin, carboplatin, etoposide and actinomycin-D. The lines showed intermediate sensitivity to thiotepa and daunorubicin, but were highly resistant to first-line drugs used in the therapy of acute lymphoblastic leukemia, such as prednisolone, L-asparaginase, vincristine, doxorubicin and cytarabine. Bortezomib, which is not a substrate for PGP and MRP1, did not show cross resistance to drugs transported by these proteins.
  
  
  CONCLUSIONS
  Our results support the necessity for further research on the role of bortezomib in the therapy of glioblastoma.
authors.affiliation: Department of Pediatric Hematology and Oncology, Laboratory of Clinical and Experimental Oncology, Nicolaus Copernicus University, Bydgoszcz, Poland. jstyczynski@cm.umk.pl
authors.forename: Jan
authors.initials: J
authors.lastname: Styczynski
authors.forename: Dorota
authors.initials: D
authors.lastname: Olszewska-Slonina
authors.forename: Beata
authors.initials: B
authors.lastname: Kolodziej
authors.forename: Malgorzata
authors.initials: M
authors.lastname: Napieraj
authors.forename: Mariusz
authors.initials: M
authors.lastname: Wysocki
mesh_terms: D000970:Antineoplastic Agents / Q000627:therapeutic use*; D001897:Boronic Acids / Q000627:therapeutic use*; D000069286:Bortezomib; D001932:Brain Neoplasms / Q000188:drug therapy*; D045744:Cell Line, Tumor; D005909:Glioblastoma / Q000188:drug therapy*; D006801:Humans; D011719:Pyrazines / Q000627:therapeutic use*
chemical_list: D000970:Antineoplastic Agents; D001897:Boronic Acids; D011719:Pyrazines; D000069286:Bortezomib