![](https://webarchive.library.unt.edu/eot2008/20090116040656im_/http://www.cancer.gov/images/spacer.gif) |
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![](https://webarchive.library.unt.edu/eot2008/20090116040656im_/http://www.cancer.gov/images/spacer.gif)
![](https://webarchive.library.unt.edu/eot2008/20090116040656im_/http://www.cancer.gov/images/spacer.gif)
| Sustancia que bloquea las topoisomerasas (enzimas que rompen y vuelven a unir las hebras de ADN que las células necesitan para multiplicarse y crecer). El bloqueo de estas enzimas puede destruir las células cancerosas. Ciertos inhibidores de la topoisomerasa están en estudio para el tratamiento del cáncer. |
![](https://webarchive.library.unt.edu/eot2008/20090116040656im_/http://www.cancer.gov/images/spacer.gif)
![](https://webarchive.library.unt.edu/eot2008/20090116040656im_/http://www.cancer.gov/images/gray_spacer.gif)
![](https://webarchive.library.unt.edu/eot2008/20090116040656im_/http://www.cancer.gov/images/spacer.gif)
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![](https://webarchive.library.unt.edu/eot2008/20090116040656im_/http://www.cancer.gov/images/spacer.gif) |