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Scientists identify breast drug failure cause

Posted: November 13th 2008 By editor1         under: Cancer     Tags: , , , ,

Scientists have found a key reason for the failure of drug tamoxifen in some women with breast cancer.

Scientists, from the Cancer Research UK, identify a molecular imbalance that doesn’t allow the drug to work.

The researchers believe that this detailed understanding will help to develop some more effective treatments for women with breast cancer. Similarly, they added that the finding would also help to explain other examples of drug resistance.

In UK, almost 45,000 new cases of breast cancer are diagnosed every year and around two-thirds are prescribed the drug. Women often take it for five year after diagnosis.

Almost 25 to 30% women develop resistance to the treatment after some time and it shows that their cancer is more likely to return.

Scientists have been trying to develop ways to identify these women so their treatment may be better tailored without wasting time.

In the study that included 100 breast cancer patients, the researchers found that tamoxifen can work by switching of the breast cancer gene HER2 through a protein known as PAX2.

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