表皮生长因子受体-2和雌激素受体对晚期乳腺癌应用紫杉类药物疗效的预测分析

目的 研究表皮生长因子受体-2（HER-2）和雌激素受体（ER）对乳腺癌应用紫杉类药物化疗疗效的预测作用。方法 268例晚期乳腺癌应用紫杉类药物化疗,其中单药紫杉醇71例,单药泰索帝32例,紫杉醇联合组110例,泰索帝联合组55例。应用免疫组化的方法对患者的ER和HER-2生物学指标在蛋白水平进行检测。268例中,行HER-2检测201例,行ER检测242例,行HER-2和ER两项检测者200例。结果 HER-2过表达有效率为56．7％,低表达有效率为33．3％,两组差异有统计学意义（P=0．003）。ER阳性有效率为33．3％,ER阴性患者有效率为48．9％,两组差异有统计学意义（P=0．015）。在HER-2过表达同时ER阴性患者的有效率高达67．6％,其他组各组均在35％左右,HER-2过表达同时ER阴性与其他3组进行两两比较,差异有统计学意义（P〈0．01）;而其他3组之间差异无统计学意义。多因素分析显示HER-2过表达仍有统计学意义（P=0．007）。而ER受体以及KPS评分、葸环类药物、转移部位均不具有统计学意义。结论 HER-2过表达和（或）ER阴性,尤其HER-2过表达对紫杉类药物的疗效可能有预测作用,HER-2过表达可能是乳腺癌紫杉类化疗效果好的分子指标。

HER-2 and ER expression in prediction of chemo-sensitivity of taxane for advanced breast cancer

OBJECTIVE: To investigate the predictive value of HER-2 and ER expression for chemosensitivity of taxane in the treatment of advanced breast cancer. METHODS: Of 268 advanced breast cancer patients treated: 71 were by paclitaxel alone, 32 by docetaxel alone, 110 by paclitaxel combined with anthracylines or gemcitabine or platins and 55 by docetaxel-based combinations. HER-2 and ER expression of all patients treated by taxane underwent immunohistochemical (IHC) assay. RESULTS: Univariate analysis showed: the response rate (RR) in HER-2 overexpression group was 56.7%, and in HER-2 weak expression group 33.3% (P = 0.003). The response rate in ER positive group and ER negative group was 33.3% and 48.9%, respectively, with a significant difference (P = 0.015). The RR was 67.6% in ER negative but HER-2 overexpression group. However, in ER positive but HER-2 weak expression group and the other groups, the RR were around 35% (P < 0. 01). Multivariate analysis showed that overexpression of HER-2 was the only significant factor to predict the chemosensitivity of taxane (P = 0. 007), but the ER, Karnofsky performance score (KPS), anthracylines, metastatic sites were not the statistically significant chemo-sensitivity predictive factors for taxane. CONCLUSION: ER negative and/or HER-2 overexpression, especially latter, may be associated with good response in advanced breast cancers treated by taxane.