Tamoxifen may worsen some breast cancers

8 December 2008

A new study has found that tamoxifen may cause some breast cancers to become more aggressive, according to data published in the journal Breast Cancer Research.

Researchers at the Welsh School of Pharmacy, UK, found that cancer cells that expressed low levels of the protein E-cadherin reacted negatively to doses of the off-patent standard-of-care drug.

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