ASCO:Denosumab辅助治疗乳腺癌的长期预后

2022-06-01 MedSci原创 MedSci原创

在芳香化酶抑制剂治疗期间,采用Denosumab(地诺单抗,Dmab)辅助治疗乳腺癌的长期预后

最新的芳香化酶抑制剂 (AI) 辅助内分泌治疗会影响绝经后激素受体阳性 (HR+) 乳腺癌患者的骨骼健康,增加骨折发生率。采用抗RANK配体Denosumab(地诺单抗,Dmab)进行辅助治疗或可抵消这些副作用,从而改善患者预后。

本文报告了ABCSG-18试验长期预后的最终随访结果。

ABCSG-18试验是一项前瞻性、双盲、安慰剂为对照的3期临床试验,从2006年-2013年期间,在58个试验中心共有3425位绝经后的采用AI治疗的HR+早期乳腺癌患者被随机分成两组,接受Dmab 60mg或安慰剂(6个月一次)干预。主要终点是无病生存期(DFS)、无骨骼转移生存率(BMFS)和总生存率(OS)。

截止本次分析时,已中位随访了8年,所有患者于中位时间5年前结束其随机分配的双盲治疗(Dmab组 1711位,安慰剂组 1709位)。与安慰剂组相比,Dmab组的DFS明显改善(DFS事件:309例 vs 368例,风险比[HR] 0.83,p=0.016),两组的9年DFS绝对差为3.5%(79.4% vs 75.9%)。当考虑到后期交叉和使用抗再吸收剂时,上述DFS差异仍具有显著性(HR 0.82, p=0.010)。

与安慰剂组相比,Dmab组的BMFS提高了19%(HR 0.81, p=0.047),审查前OS提高了20%(HR 0.80, p=0.065),审查后OS提高了26%(HR 0.74, p=0.013)。

在长期随访过程中,Dmab组的临床骨折事件明显减少,与先前报道的一致(骨折:201例 vs 255例,HR 0.76, p=0.004)。未报道新的毒性事件。

综上,在芳香化酶抑制剂治疗期间,采用Dmab(60mg/6个月)辅助治疗的安全性好,可长期显著减少治疗诱发的临床骨折;而且在本次分析中,Dmab组的DFS、BMFS和OS均有所改善。

 

原始出处:

Long-term outcomes of adjuvant denosumab in breast cancer: Fracture reduction and survival results from 3,425 patients in the randomised, double-blind, placebo-controlled ABCSG-18 trial. First Author: Michael Gnant, Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria

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