Eur J Cancer:曲妥珠单抗-拉帕替尼新辅助治疗HER2+早期乳腺癌患者的疗效:来自CHER-Lob研究

2021-07-19 yd2015 MedSci原创

Cher-LOB研究生存分析证实pCR和TILs的预后作用,同时提示曲妥珠单抗联合拉帕替尼较曲妥珠单抗可改善患者预后倾向。

II期随机临床研究Cher-LOB主要是评估曲妥珠单抗-拉帕替尼在HER2+早期乳腺癌中新辅助治疗的疗效。主要纳入II-IIIA 期HER2阳性乳腺癌患者,随机(1:1:1)分为接受紫杉醇-蒽环类化疗联合曲妥珠单抗(A组)或拉帕替尼(B组)或曲妥珠单抗+拉帕替尼(C组)作为新辅助治疗。前期分析结果表示,曲妥珠单抗+拉帕替尼联合化疗新辅助治疗较曲妥珠单抗或拉帕替尼联合化疗明显提高病理完全缓解(pCR)率。近期,European Journal of Cancer杂志更新了该研究的结果。

A、B和C三组分别有36, 39 和46例患者。中位随访9年(95% CI 8.4-9.7)。A、B和C三组的5年RFS率分别为77.8%、77.1% 和 85.8%,三组间没有统计学差异(log rank P=0.162)。C组较A组有获益倾向(HR =0.44, 95% CI 0.18-1.05)。A+B组的5年RFS率为77.5% ,C组的为85.8% (HR= 0.52,95% CI 0.23-1.15; log-rank P=0.102)。ER状态不影响5年RFS率(ER阳性患者5年RFS为79.8%,ER阴性的为81.1%; HR=1.032, 95% CI 0.50-2.11; log-rank P= 0.932)。A组和C组的OS没有统计学差异(HR=1.00, 95% CI 0.31-3.27)。

             RFS比较

获得pCR的患者5年RFS率较没有pCR患者的高(97.3% vs 72.7%,HR=0.12, 95% CI 0.03-0.49; log-rank P < 0.001)。ER阴性患者 (pCR vs no-pCR: 94.7% vs 69.2%, HR 0.11, 95% CI 0.01-0.85; log-rank P=0.010) 和ER阳性患者 (pCR vs no-pCR: 100% vs 74.5%, HR=0.12, 95% CI 0.02-0.90; log-rank P=0.014)也有类似结果。

      pCR分层的RFS和OS

同样,获得pCR的患者5年OS较没有pCR患者的高(97.2% vs 89.5%,HR=0.12, 95% CI 0.03-0.49; log-rank P= 0.028 )。

肿瘤浸润性淋巴细胞(TILs)跟RFS显著相关(HR=0.978为每增加1%含量TILs)。Luminal-A亚型是较好的RFS的独立预后因素(HR=0.29, 95% CI 0.09-0.94, p = 0.040)。

          RFS预后因素

84例患者可进行PAM50亚型评估跟预后关系。其中HER2阳性为26.2% (N=22), luminal A 为25.0% (N =21), luminal B为 16.7% (N =14), basal- like为14.3% (N=12)和normal-like 为17.9% (N =15). 除去normal-like亚型患者, 各亚型患者的RFS没有统计学差异。多因素分析发现,PAM50分型 (luminal A vs 其他亚型)和pCR是独立预后因素。

综上,Cher-LOB研究生存分析证实pCR和TILs的预后作用,同时提示曲妥珠单抗联合拉帕替尼较曲妥珠单抗可改善患者预后倾向。

原始出处:

Guarneri V, Dieci MV, Griguolo G, et al. Trastuzumab-lapatinib as neoadjuvant therapy for HER2-positive early breast cancer: Survival analyses of the CHER-Lob trial. Eur J Cancer. 2021 Jun 18;153:133-141. doi: 10.1016/j.ejca.2021.05.018. Epub ahead of print. PMID: 34153715.

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    2021-07-19 yesaisai133

    谢谢分享

    0

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    2021-07-19 内科新手

    谢谢梅斯提供这么好的信息,学到很多

    0

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