各位肿瘤界老大哥、大姐们:
你们好。我是一名刚从事肿瘤临床专业的医生。我很想请教一下:乳腺癌术后病理提示:ER、PR为阴性的究竟要不要口服三苯氧胺?我查过以下资料。有的说要,有的又说不用,大家的观点怎样?请你们发表一下意见。谢谢!!
个人意见:
1、原则上不用三苯氧胺;
2、ER、PR受体均阴性,属乳腺癌高危因素,应同时检验C-erb-B-2(多半阳性)
3、术后辅助治疗首选化疗,经济允许,建以用以泰索帝主的方案,TA、TAC或泰索帝加希罗达;
4、内分泌治疗:绝经后的首先是考虑新一代芳香化酶抑制剂如瑞宁得、氟隆;绝经前的患者应视年龄和生育需要行手术去势或应用LHRH类似物如诺雷得(戈舍瑞林)
5、肿块过大或腋窝淋巴结有转移的还要考虑局部放疗
6、C-erb-B-2表达强阳性,又有钱,Hercepetin也是要考虑应用的。
转自丁香园
以前个人认为还是可以用,因为ER、PR受体均阴性,ER、PR检测也有一个域值,阴性只能说明该病人ER、PR在域值以外,但不能绝对说明ER、PR不表达,故用三苯氧胺还是有一定疗效。针对晚期病人,经济有限,用三苯氧胺结合其它治疗,也算是没办法的办法。现在看来这种认识不妥,受体的差别反映不同类型肿瘤。
现在认为不用的好!
There are three factors to take into account when considering this question. First, there is no evidence that taking tamoxifen will improve your survival or decrease the chance of recurrence if your tumor was not sensitive to estrogen. This does not mean that women with ER- tumors do much worse, only that tamoxifen does not help them. In fact, a report presented last week at the breast cancer San Antonio indicated that women with ER- tumors who took tamoxifen (Nolvadex) had a higher chance of recurrence and death than those who did not take tamoxifen. This was true regardless of the fact that the tamoxifen prevented second cancers in the other breast. It is not known why this effect was seen, but it was higher in premenopausal women than postmenopausal women.
The San Antonio report raises a second question: Should women with ER- tumors take tamoxifen solely to prevent a new cancer in the opposite breast? This is a little trickier. Women who have breast cancer in one breast have a 10% risk of getting one on the other side and tamoxifen taken for five years, will reduce contralateral breast tumors (those on the opposite side) by about 40%. If you took tamoxifen for five years it would reduce that risk to 5% over your lifetime. Whether that magnitude of reduction is worth it is a personal decision.
The third issue is whether to take tamoxifen to reduce the risk of other conditions. Tamoxifen is about as good in reducing osteoporosis risk and lowering serum cholesterol as raloxifene (Evista) is. But as with raloxifene, tamoxifen has not been proven to prevent clinical fractures or heart disease. Raloxifene has never been used in women with breast cancer, so it is not a reasonable alternative to tamoxifen. In women who have not taken estrogen or are not obese, the risk of developing uterine cancer from tamoxifen use is low. Tamoxifen isn't free of side effects: It has been associated with hot flashes and fuzzy thinking in some women.
Two weeks ago I would have said that you could go either way. However, the new evidence presented at the San Antonio meeting, I've changed my mind. C. Kent Osborne, one of the authors of the study mentioned above, stated: "the cumulative data thus suggest that adjuvant tamoxifen should be used only in patients with ER-positive tumors, and, until we have results from other studies, its use as 'hormone replacement therapy' in patients with ER- tumors should be questioned or abandoned. This argument could also extend to other selective estrogen receptor modulators (SERMs such as raloxifene) that could conceivably have effects similar to tamoxifen."
I agree with Osborne completely. I think the data indicate that women who have ER- tumors should not take tamoxifen. In light of this information, it is also likely that raloxifene is a bad idea as well
http://www.susanlovemd.org/community/questions/q991217.htm
Differential gene expression in estrogen receptor negative breast cancer cells transfected with cDNA for estrogen receptor
N Ros, MSc, MM Brentani, PhD, MA Nagai, PhD
Departamento de Radiologia, Universidade de Sao Paulo, Sao Paulo, Brazil
The involvement of the estrogens on the proliferation of hormone-dependent breast tumor is well established. Estrogen acts by its receptor (ER) stimulating cellular proliferation and differentiation. ER status has been used as a prognostic and predictive marker in the clinical management of breast cancer patients. Polysaccharides and proteins compose the extracellular matrix (ECM). One of the ECM protein is laminin. The ECM and growth factors cooperate to regulate signaling pathways and gene transcription in adherent cells. In order to investigated whether hormonal control can be re-established in ER-negative cells and how it affects the signal transduction and the adhesion on laminin matrices, we analyzed the differential expression of genes in the estrogen-receptor negative MDA-MB231 breast carcinoma cell line compared with its clone transfected with the ER gene (S30). At the moment, 20 different arbitrary primers were combined with three anchorage primers and have been used at the analysis by differential display RT-PCR (DDRT-PCR). We have cloned and sequenced 79 different fragments. The search for similarity was done using the BLAST algorithm in the NCBI database. The differentially expressed transcripts showed homology with genes like aldo-keto reductase, IGFBP7, zinc finger protein, transcription factors and some KIAAs. The identification of genes differentially expressed after laminin adhesion might contribute to the understanding of the signal transduction pathways regulated by adhesion molecules. The phenotypic differences between hormone-responsive and hormone-unresponsive breast cancer could be explained by differences in gene expression. Supported by FAPESP
http://www.cancerprev.org/Journal/Issues/26/101/1194/4250