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Enhancement of chemotherapy by prevention of tumor cell repair
Date:2/20/2014

te chemotherapy by reducing the resistance of cells to the treatment.

The researchers at IGBMC therefore sought a drug that would inhibit NER activity. They thus tested over 1,200 therapeutic drugs and demonstrated the action of spironolactone, a drug already used for the treatment of hypertension, on NER activity. Specifically, the researchers showed that its action, when combined with that of platinum derivatives, caused a substantial increase in cytotoxicity for malignant colonic and ovarian cells.

Since spironolactone is already in use for other purposes, it does not require a new application for marketing authorisation, and its side-effects are already known. This result thus bodes very well for the rapid development of new chemotherapy protocols that include spironolactone.

Immunofluorescence labelling, 1 h after treatment, of XPC proteins (in red) and XPB proteins (in green) involved in NER activity. On the right, treatment with spironolactone induces rapid degradation of XPB, which explains its inhibition of NER.


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Contact: Frédéric Coin
mfrederic.coin@igbmc.fr
33-388-653-200
INSERM (Institut national de la sant et de la recherche mdicale)
Source:Eurekalert

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