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NEJM:新辅助化疗和贝伐单抗治疗HER2-阴性乳腺癌

2012-02-04 MedSci MedSci原创

  德国乳腺组和妇产科肿瘤—乳腺联合(Arbeisgemeinschaft)研究组   背景 贝伐单抗是一种抗血管内皮生长因子A的单克隆抗体,已在患有人表皮生长因子受体2(HER2)-阴性转移性的乳腺癌患者中显示出了临床疗效。我们在患有早期乳腺癌的患者中,评估了在新辅助化疗基础上加用贝伐单抗的疗效和安全性,根据病理学完全缓解率(在乳房和腋淋巴结中无侵润性和导管内病变)来检测疗效。   方法 我

  德国乳腺组和妇产科肿瘤—乳腺联合(Arbeisgemeinschaft)研究组

  背景 贝伐单抗是一种抗血管内皮生长因子A的单克隆抗体,已在患有人表皮生长因子受体2(HER2)-阴性转移性的乳腺癌患者中显示出了临床疗效。我们在患有早期乳腺癌的患者中,评估了在新辅助化疗基础上加用贝伐单抗的疗效和安全性,根据病理学完全缓解率(在乳房和腋淋巴结中无侵润性和导管内病变)来检测疗效。

  方法 我们将1948例触诊时肿瘤大小的中位数为40 mm的患者随机分配接受表柔比星、环磷酰胺序贯多西他赛新辅助化疗联合或者不联合贝伐单抗(的治疗)。对于患有未经治疗的HER2-阴性乳腺癌患者,如果肿瘤(体积)大、有激素-受体-阴性病变,或有激素-受体-阳性病变伴有可触及的淋巴结或前哨淋巴结活检结果阳性,以及心血管或出血危险未增高,则符合入选条件。

  结果 在总体上, 采用表柔比星、环磷酰胺序贯多西他赛治疗的病理学完全缓解率为14.9%,采用表柔比星、环磷酰胺序贯多西他赛联合贝伐单抗治疗的(病理学完全缓解率)为18.4%(联合贝伐单抗治疗后的比值比为1.29,95%可信区间为1.02~1.65,P=0.04),在663例患有三阴肿瘤的患者中,相应的病理学完全缓解率分别为27.9%和39.3% (P=0.003) ,在1262例患有肿瘤受体阳性肿瘤的患者中,(病理学完全缓解率分别)为7.8% 和 7.7%(P=1.00)。两组中有66.6%的患者可能可以接受保乳手术。与单纯新辅助化疗相比,联合贝伐单抗与3或4级毒性反应(发热性中性粒细胞减少症、黏膜炎、手-足综合征、感染和高血压)的发生率较高相关,但手术并发症发生率相似。

  结论 在HER2-阴性早期乳腺癌患者中,新辅助化疗基础上增加贝伐单抗可显著增加病理学完全缓解率。疗效主要局限于患有三阴肿瘤的患者中,在这类患者中,病理学完全缓解被认为是长期转归的一个可靠的预测因素。

  (N Engl J Med 2012;366:299-309. January 26,2012)

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    2012-08-01 luwei00
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