Cancers:帕妥珠单抗和曲妥珠单抗联合局部放疗治疗HER2阳性乳腺癌患者的疗效和安全性

2021-09-27 yd2015 MedSci原创

该研究表明,局部乳腺放疗(RT)与帕妥珠单抗/曲妥珠单抗双HER2阻断联合使用具有良好的耐受性,提示HER2阳性乳腺癌患者可以安全加入RT。

HER2受体(人表皮生长因子受体2)过表达存在于15 - 30%的乳腺癌中。曲妥珠单抗是首个针对HER2受体的人源化单克隆抗体,其在 HER2阳性乳腺癌中的疗效已被证实。帕妥珠单抗也是一种人源化抗HER2单克隆抗体。在转移性HER2阳性乳腺癌患者中,帕妥珠单抗和曲妥珠单抗双重HER2阻断联合局部乳腺放疗是重要的一种治疗策略。但是其疗效和安全性还不是很明确。近期,Cancers杂志发表了相关回顾性研究结果。

研究最终纳入55例患者,患者中位年龄为53岁(范围:28 - 81岁)。绝大多数患者(94.5%)的肿瘤组织学为浸润性导管癌。患者多为晚期疾病,58.2%为T3 -4期,58.2%为N+期,58.2%为高级别肿瘤,58.2%为3级。4例(7.3%)患者在放疗前有血管病史。

            临床特征

帕妥珠单抗/曲妥珠单抗双HER2阻断治疗时,所有患者均曾接受过化疗,其中多西他赛(69.1%)、紫杉醇(9.1%)和表柔比星(14.5%)。共10例(18.2%)患者未行手术,23例(41.8%)患者行肿瘤切除术,19例(34.5%)患者行乳房切除术。放疗中位剂量为50Gy EQD2(范围:40 Gy -74 Gy)。

皮肤毒性:早期中毒包括3例(5.4%)3级和14例(25.5%)2级自发性放射性皮炎。其余患者发生0级和1级毒性反应(69.1%)。迟发性毒性为1例(1.8%)2级毛细血管扩张。胃肠毒性:在放疗期间观察到1例(1.8%)早期1级食管炎。心脏毒性:在联合治疗期间未观察到心脏事件。在治疗开始和结束之间,LVEF下降了2.43%(17% +14%),具有统计学意义。没有患者同时经历大于10%的LVEF下降,同时LVEF<55%。左侧放疗后LVEF下降为65%(55% 73%),右侧放疗后LVEF下降为65% (48% 77%)(p = 0.39)。没有肺部或甲状腺相关毒性报道。

放疗后的中位随访时间为4.1年。4年总生存率(OS)为81.7%(69.5% -96.2%)。

               OS

4年无进展生存率(PFS)为65.7%(51.7%-83.6%)。

                PFS

4年局部无复发生存率(LRRFS)为97.1%(91.5%-100%)。中位OS、PFS和LRRFS均未达到。

                局部无复发生存率(LRRFS)

综上,该研究表明,局部乳腺放疗(RT)与帕妥珠单抗/曲妥珠单抗双HER2阻断联合使用具有良好的耐受性,提示HER2阳性乳腺癌患者可以安全加入RT。

原始出处:

Aboudaram, A.; Loap, P.;Loirat, D.; Dhia, S.B.; Cao, K.; etal. Pertuzumab and Trastuzumab Combination with Concomitant Locoregional Radiotherapy for the Treatment of Breast Cancers with HER2 Receptor Overexpression. Cancers 2021, 13,4790. https://doi.org/10.3390/cancers 13194790

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    2022-05-08 anminleiryan
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    2021-09-29 chg122
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