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Journal of Cancer Research and Clinical Oncology

Published in:

01-10-2003 | Original Paper

Colour junctions as predictors of radiosensitivity: X-irradiation combined with gemcitabine in a lung carcinoma cell line

Authors: Natasja Castro Kreder, Chris van Bree, Nicolaas A. P. Franken, Jaap Haveman

Published in: Journal of Cancer Research and Clinical Oncology | Issue 10/2003

Abstract

Purpose

To determine whether measurement of colour junctions by fluorescent in situ hybridisation (FISH) can predict radiosensitisation of gemcitabine (2'-2'-difluorodeoxycytidine).

Methods

Human lung carcinoma cells (SW-1573) were irradiated with X-rays with or without incubation of 10 nM gemcitabine for 24 h. Cell survival was determined with clonogenic assay. Colour junctions were measured by whole chromosome FISH of chromosomes 2 and 18 and were scored according to the PAINT method.

Results

A clear radiosensitisation by gemcitabine was observed on cell survival. A significant decrease in the number of colour junctions was observed after gemcitabine treatment compared with radiation treatment alone. The correlation between colour junction induction and cell survival was high for both with and without gemcitabine, but the gemcitabine-sensitised curve did not coincide with the non-sensitised curve.

Conclusions

Gemcitabine-induced radiosensitisation is not predicted by induction of colour junctions in cultured SW-1573 cells. This reduces the clinical applicability of this predictive assay for radiotherapy in combination with gemcitabine.

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Title: Colour junctions as predictors of radiosensitivity: X-irradiation combined with gemcitabine in a lung carcinoma cell line
Authors: Natasja Castro Kreder
Chris van Bree
Nicolaas A. P. Franken
Jaap Haveman
Publication date: 01-10-2003
Publisher: Springer-Verlag
Published in: Journal of Cancer Research and Clinical Oncology / Issue 10/2003
Print ISSN: 0171-5216
Electronic ISSN: 1432-1335
DOI: https://doi.org/10.1007/s00432-003-0479-x

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Conclusions

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