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Cancer Cell International
Published in: Cancer Cell International 1/2010

Open Access 01-12-2010 | Primary research

BCG strain S4-Jena: An early BCG strain is capable to reduce the proliferation of bladder cancer cells by induction of apoptosis

Authors: Katja Schwarzer, Martin Foerster, Thomas Steiner, Inge-Marie Hermann, Eberhard Straube

Published in: Cancer Cell International | Issue 1/2010

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Abstract

Background

Intravesical immunotherapy with Mycobacterium bovis bacillus Calmette-Guérin has been established as the most effective adjuvant treatment for high risk non-muscle-invasive bladder cancer (NMIBC). We investigated the differences between the S4-Jena BCG strain and commercially available BCG strains. We tested the genotypic varieties between S4-Jena and other BCG strains and analysed the effect of the BCG strains TICE and S4-Jena on two bladder cancer cell lines.

Results

In contrast to commercially available BCG strains the S4-Jena strain shows genotypic differences. Spoligotyping verifies the S4-Jena strain as a BCG strain. Infection with viable S4-Jena or TICE decreased proliferation in the T24 cell line. Additionally, hallmarks of apoptosis were detectable. In contrast, Cal29 cells showed only a slightly decreased proliferation with TICE. Cal29 cells infected with S4-Jena, though, showed a significantly decreased proliferation in contrast to TICE. Concordantly with these results, infection with TICE had no effect on the morphology and hallmarks of apoptosis of Cal29 cells. However, S4-Jena strain led to clearly visible morphological changes and caspases 3/7 activation and PS flip.

Conclusions

S4-Jena strain has a direct influence on bladder cancer cell lines as shown by inhibition of cell proliferation and induction of apoptosis. The data implicate that the T24 cells are responder for S4-Jena and TICE BCG. However, the Cal29 cells are only responder for S4-Jena and they are non-responder for TICE BCG. S4-Jena strain may represent an effective therapeutic agent for NMIBC.
Appendix
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Metadata
Title
BCG strain S4-Jena: An early BCG strain is capable to reduce the proliferation of bladder cancer cells by induction of apoptosis
Authors
Katja Schwarzer
Martin Foerster
Thomas Steiner
Inge-Marie Hermann
Eberhard Straube
Publication date
01-12-2010
Publisher
BioMed Central
Published in
Cancer Cell International / Issue 1/2010
Electronic ISSN: 1475-2867
DOI
https://doi.org/10.1186/1475-2867-10-21

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