Imatinib mesylate (STI571; Glivec)--a new approach in the treatment of biliary tract cancer?

Abstract:

:Non-resectable biliary tract cancer is associated with poor prognosis due to widespread resistance to chemotherapeutic agents and radiotherapy. It is therefore essential to explore new therapeutic approaches like the inhibition of tyrosine kinases. The aim of this study was to determine the expression of c-kit and platelet-derived growth factor (PDGF) receptors (PDGFRs) and the effects of the tyrosine kinase inhibitor imatinib +/- 5-fluorouracil (5-FU) on proliferation and apoptosis in biliary tract cancer cell lines. The expression of c-kit and PDGFR mRNA was examined in 12 biliary tract cancer cell lines using RT-PCR. Cells were treated with imatinib (1, 10, 20 and 50 micromol/l) +/- 5-FU (0.1 microg/ml) for 6 days and inhibition of cell growth was assessed by manual cell counting. Cell proliferation and apoptosis were analyzed by flow cytometry of BrdU and Annexin-V/propidium iodide-stained cells. c-kit and PDGF mRNA expression was detected in 50 and 75%, respectively. Imatinib (10 and 20 micromol/l) alone inhibited cell growth significantly higher in c-kit+ cell lines (p<0.02) and inhibition was independent of PDGFR status. The combination with 5-FU increased the effect of imatinib mesylate in all cell lines. Treatment of cells with imatinib +/- 5-FU was associated with a significant induction of apoptosis, but no inhibition of proliferation. We conclude that imatinib alone exerts marked effects on c-kit+ biliary tract cancer cell lines only at intermediate and high concentrations, but there is a potential role of low-dose imatinib in combination with 5-FU for the treatment of biliary tract cancers.

journal_name

Anticancer Drugs

journal_title

Anti-cancer drugs

authors

Wiedmann M,Kreth F,Feisthammel J,Deininger M,Mössner J,Caca K

doi

10.1097/00001813-200310000-00011

subject

Has Abstract

pub_date

2003-10-01 00:00:00

pages

751-60

issue

9

eissn

0959-4973

issn

1473-5741

journal_volume

14

pub_type

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