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- W1923949611 abstract "There are essentially two approaches to presurgical therapy. The first strategy is one in which the therapy is given to downstage the disease over a period of some 3-4 months. In these circumstances, biological studies can be conducted that can be associated with clinical response. The second strategy involves the institution of medical therapy before surgery with no delay to that surgery. This is essentially incidental and is not given with the aim of having a therapeutic benefit but rather for the biological study of the particular therapeutic approach. In the incidental therapy scenario, we have conducted a number of studies to evaluate the biological effects of raloxifene, idoxifene, fulvestrant (in comparison with tamoxifen), and the aromatase inhibitor 4-hydroxyandrostenedione. Significant reductions in proliferation were noted in all, as was down-regulation of estrogen receptor levels. The changes were most profound in those estrogen receptor-positive tumors that were also progesterone receptor positive, consistent with the greater clinical effect of these therapies in this population. This setting is particularly valuable for treatments in which there is no particular evidence for clinical benefit but in which the therapy is known to be safe. It is possible to evaluate potential resistance mechanisms by associating changes in Ki67 or apoptosis with the expression of the putative determinant of resistance in the short-term presurgical model." @default.
- W1923949611 created "2016-06-24" @default.
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- W1923949611 date "2003-01-01" @default.
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- W1923949611 title "Preoperative models to evaluate endocrine strategies for breast cancer." @default.
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