NEJM:曲妥珠单抗联合紫杉醇在Ⅰ期HER2(+)乳腺癌患者中的治疗

2015-01-14 Mechront 译 MedSci原创

人类表皮生长因子受体 2(HERB2)会在15%-20%侵袭性乳腺癌患者中过度表达,通常伴有临床不良结局,预后很差。曲妥单抗作为重组人单克隆抗体,可有效抑制HERB2表达。临床上对Ⅱ期、Ⅲ期HERB2(+)乳腺癌患者进行了大样本随机对照试验,表明曲妥单抗联合化疗可以显著降低乳腺癌复发风险,同时改善总体生存期。 临床上对Ⅰ期淋巴结阴性乳癌患者常规不考虑辅助治疗,以致于临床上对Ⅰ期HERB2阳性

人类表皮生长因子受体 2(HER2)会在15%-20%侵袭性乳腺癌患者中过度表达,通常伴有临床不良结局,预后很差。曲妥单抗作为重组人单克隆抗体,可有效抑制HER2表达。临床上对Ⅱ期、Ⅲ期HER2(+)乳腺癌患者进行了大样本随机对照试验,表明曲妥单抗联合化疗可以显著降低乳腺癌复发风险,同时改善总体生存期。

临床上对Ⅰ期淋巴结阴性乳癌患者常规不考虑辅助治疗,以致于临床上对Ⅰ期HER2阳性乳腺癌患者还没有统一治疗标准。因此Sara M. Tolaney等人进行了一项无对照、单组多中心研究,以评估曲妥单抗联合佐剂紫杉醇对Ⅰ期HER2(+)乳腺癌患者的治疗效果。

该研究共纳入406名乳腺癌患者,其肿瘤直径均不超过3cm,治疗方案为每周使用曲妥单抗和紫杉醇,持续12周,接着单独使用曲妥单抗治疗9个月,最后研究员以生存期作为主要终点。最新研究成果发表于2015-01-08新英格兰杂志上。

该研究平均随访期为4年,3年生存率为98.7% (95% CI, 97.6-99.8),在12例乳腺癌复发患者中,有2例为转移性乳腺癌。排除HER2(-)乳腺癌患者和非乳腺癌患者后,记录了7种特定的疾病事件。研究发现有13名患者(3.2%; 95% CI, 1.7-5.4)至少有一段三级神经病变,2名患者(0.5%; 95% CI, 0.1-1.8)表现为有症状的充血性心衰,停止曲妥单抗治疗后,左室射血分数恢复正常,13名患者(3.2%; 95% CI, 1.7-5.4)出现无症状的射血分数下降,短暂中断曲妥单抗治疗后,11名患者可继续使用曲妥单抗。

研究结果表明,对Ⅰ期HER2(+)乳腺癌患者使用佐剂紫杉醇联合曲妥单抗治疗后早期复发风险为2%。同时该研究中有6%的患者因为协议指定的不良事件而退出实验。

虽然该研究表明曲妥单抗联合化疗相比于传统治疗方案有更好的临床结局,但并不能提供数据支持该治疗方案应用到所有Ⅰ期HER2(+)乳腺癌患者中。


来自波士顿丹纳法伯癌症研究所的资深研究者Winer教授对此做出了评价,详情请看:NEJM:紫杉醇+曲妥珠单抗可改善<3cm的HER2+乳腺癌预后


原始出处:

Tolaney SM, Barry WT, Dang CT, Yardley DA, Moy B, Marcom PK, Albain KS, Rugo HS, Ellis M, Shapira I, Wolff AC, Carey LA, Overmoyer BA, Partridge AH, Guo H, Hudis CA, Krop IE, Burstein HJ, Winer EP.Adjuvant paclitaxel and trastuzumab for node-negative, HER2-positive breast cancer. N Engl J Med. 2015 Jan 8;372(2):134-41. 

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