帕妥珠单抗是首个抑制人类表皮生长因子受体HER2与其他HER结合的单克隆抗体。埃及艳后研究已经证实,帕妥珠单抗能够显著改善曲妥珠单抗+多西他赛一线治疗HER2阳性晚期乳腺癌的无进展生存和总生存结局,故于年6月8日获得美国批准。不过,由于埃及艳后研究的中国内地患者较少,直至年12月16日始终未获中国内地有关部门批准。
前情提要
埃及艳后:晚期乳腺癌双靶化疗大结局
埃及艳后再度登场:肿瘤浸润淋巴细胞与晚期乳腺癌总生存
年6月20日,施普林格自然旗下《乳腺癌研究与治疗》在线发表中医院徐兵河和李俏、医院李薇、哈尔滨医院医院张清媛、医院邵志敏、医院暨中国科医院王晓稼、医院李惠平、医院医院孙涛、医院暨南京医院殷咏梅、医院郑鸿、医院暨南京医院冯继峰、瑞士罗氏埃利奥诺拉·雷斯托奇亚等学者的海鹦鹉研究报告,调查了帕妥珠单抗+曲妥珠单抗+多西他赛一线治疗中国内地HER2阳性局部复发或晚期乳腺癌患者的有效性和安全性。
PUFFIN:APhaseIII,Randomized,Double-blind,Placebo-controlledClinicalTrialtoEvaluatetheEfficacyandSafetyofPertuzumab+Herceptin+DocetaxelVersusPlacebo+Herceptin+DocetaxelinPreviouslyUntreatedHER2-PositiveMetastaticBreastCancer(NCT)
该多中心随机双盲安慰剂对照三期临床衔接研究于年9月13日~年9月28日从中国内地15家医院入组HER2阳性局部复发或晚期乳腺癌患者例,按1∶1的比例随机分为两组,并按内脏或非内脏转移和激素受体状态进行分层,其中例接受帕妥珠单抗+曲妥珠单抗+多西他赛,其余例接受安慰剂+曲妥珠单抗+多西他赛。主要终点为研究者评定的无进展生存。次要终点包括客观缓解率(治疗前病灶可测量患者的完全或部分缓解比例)、总生存和安全性。CLEOPATRA研究例患者的无进展生存风险比为0.62,故本研究预设至少例患者的无进展生存风险比临界值为0.81。
结果,帕妥珠单抗组与安慰剂组相比:
中位无进展生存:延长2.1个月(14.5比12.4,95%置信区间:12.5~18.6、10.4~12.7)
进展或死亡风险:减少31%(风险比:0.69,95%置信区间:0.49~0.99)
完全或部分缓解:79.0%比69.1%(83/、67/97)
≥3级不良事件:70.5%比69.2%
严重不良事件:19.7%比19.2%
心力衰竭或左心室射血分数下降症状:0比0
亚组分层分析表明,无论内脏转移、激素受体、体力状态、早期治疗、治疗间隔、HER2水平如何,无进展生存皆可获益。
因此,该研究结果表明,帕妥珠单抗能够改善曲妥珠单抗+多西他赛一线治疗中国内地HER2阳性晚期乳腺癌的无进展生存结局,总体而言疗效数据与CLEOPATRA研究一致,安全性与帕妥珠单抗已知安全性特征一致,扩充了帕妥珠单抗一线治疗HER2阳性局部复发或晚期乳腺癌的数据总量,证实了帕妥珠单抗对中国内地患者的疗效与风险特征,并于年12月17日获得中国内地有关部门批准。
BreastCancerResTreat.Jun20.Onlineaheadofprint.
Pertuzumab,trastuzumab,anddocetaxelforChinesepatientswithpreviouslyuntreatedHER2-positivelocallyrecurrentormetastaticbreastcancer(PUFFIN):aphaseIII,randomized,double-blind,placebo-controlledstudy.
BingheXu,WeiLi,QingyuanZhang,ZhiminShao,QiaoLi,XiaojiaWang,HuipingLi,TaoSun,YongmeiYin,HongZheng,JifengFeng,HongZhang,GuiyuanLei,EleonoraRestuccia.
NationalCancerCenter/NationalClinicalResearchCenterforCancer/CancerHospital,ChineseAcademyofMedicalSciences,andPekingUnionMedicalCollege,Beijing,China;TheCancerCenter,TheFirstHospitalofJilinUniversity,Jilin,China;HarbinMedicalUniversity,Harbin,China;FudanUniversityShanghaiCancerCenter,Shanghai,China;ZhejiangCancerHospital,HangzhouCity,China;BeijingCancerHospital,Beijing,China;CancerHospitalofChinaMedicalUniversity,LiaoningCancerHospitalInstitute,Liaoning,China;JiangsuProvinceHospital,Nanjing,China;WestChinaHospital,SichuanUniversity,Chengdu,China;JiangsuCancerHospital,Nanjing,China;Roche(China)HoldingLtd,Shanghai,China;RocheProductsLimited,WelwynGardenCity,UK;F.Hoffmann-LaRocheLtd,Basel,Switzerland.
PURPOSE:TheChinesebridgingstudyPUFFIN(NCT)aimedtoassessconsistencyofefficacywithCLEOPATRA(NCT),investigatingpertuzumabwithtrastuzumabanddocetaxelversusplacebo,trastuzumab,anddocetaxelinpatientswithpreviouslyuntreatedHER2-positivelocallyrecurrentormetastaticbreastcancer.
METHODS:Patientswererandomized1:1,stratifiedbyvisceral/non-visceraldiseaseandhormonereceptorstatus.Theprimaryendpointwasinvestigator-assessedprogression-freesurvival(PFS).Secondaryendpointsincludedobjectiveresponserate(inpatientswithmeasurablebaselinedisease),overallsurvival,andsafety.TheconsistencythresholdforPFS(hazardratio[HR]0.81)(maintaining≥50%oftheriskreductiondeterminedinCLEOPATRA[HR0.62])determinedthetargetsamplesize(n=).
RESULTS:Twohundredforty-threepatientswererandomized.MedianPFSwas14.5monthsinthepertuzumabarm(95%confidenceinterval[CI]12.5,18.6)and12.4monthsintheplaceboarm(95%CI10.4,12.7)intheintention-to-treatpopulation(HR:0.69[95%CI0.49,0.99]).Objectiveresponseswererecordedin83/(79.0%)and67/97(69.1%)patients,respectively.Grade≥3adverseevents(70.5%and69.2%,respectively)andseriousadverseevents(19.7%and19.2%,respectively)weresimilaracrossbotharms.Noheartfailurecasesorsymptomaticleftventricularejectionfractiondeclineswerereported.
CONCLUSIONS:PUFFINmetitsprimaryobjective.Overall,efficacydatawereconsistentwithCLEOPATRA.Safetywasconsistentwiththeknownpertuzumabsafetyprofile.PUFFINaddstothetotalityofdatawithpertuzumabinpreviouslyuntreatedHER2-positivelocallyrecurrentormetastaticbreastcancerandsupportsthefavorablebenefit-riskprofileofpertuzumabinChinesepatients.
TRIALREGISTRATION:ClinicalTrials.gov,NCT
KEYWORDS:Pertuzumab,Metastaticbreastcancer,Locallyrecurrentbreastcancer,HER2,Chinese
DOI:10./s49---w
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