Effect of STI-571 (imatinib mesylate) in combination with retinoic acid and gamma-irradiation on viability of neuroblastoma cells.

Abstract:

:Neuroblastoma (NB) expresses the tyrosine kinase receptors c-Kit, PDGFR-alpha and -beta-targets for STI-571. We investigated a possible combination therapy of STI-571 with retinoic acid (RA) and gamma-irradiation on NB cell viability in vitro. Expression of tyrosine kinase receptors and their ligands was examined in 6 NB cell lines by RT-PCR and FACS. The effect on cell viability was determined by MTT assay. Cell viability of all 6 NB cell lines was significantly inhibited after treatment with 20 microM STI-571 for 72h, two cell lines responding already to 10 microM. Cell lines responded irrespective of their mRNA status or cell surface expression of c-Kit, PDGFR-alpha and -beta. Co-incubation with 9-cis RA sensitized cells to the inhibitory effects of STI-571. However, pre-treatment with 9-cis RA resulted in resistance of NB cell lines to STI-571 and gamma-irradiation. Treatment of NB with STI-571 in combination with 9-cis RA might be a therapeutic strategy for patients in consolidation therapy who have completed gamma-irradiation therapy.

authors

Rössler J,Zambrzycka I,Lagodny J,Kontny U,Niemeyer CM

doi

10.1016/j.bbrc.2006.02.059

subject

Has Abstract

pub_date

2006-04-21 00:00:00

pages

1405-12

issue

4

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(06)00330-5

journal_volume

342

pub_type

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