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Clin Cancer Res:辅助转移性三阴性乳腺癌预后分析

2014-12-26 MedSci MedSci原创

对极少量的细胞的检测技术的发展,使得如今基于血液样本的分析能够提供比以往更加可靠的、可计量的数据,尤其是提供了一幕崭新的视野:循环肿瘤细胞的基因组分析能力。循环肿瘤细胞(Circulating tumor cells,CTCs)是指从原发瘤脱落并进入血液循环系统的癌细胞,近年来已逐渐被认可为肿瘤转移的重要因素之一,并且有希望作为临床上早期检测和监控肿瘤患者治疗效果的一种有效手段 三阴性乳腺癌(t

对极少量的细胞的检测技术的发展,使得如今基于血液样本的分析能够提供比以往更加可靠的、可计量的数据,尤其是提供了一幕崭新的视野:循环肿瘤细胞的基因组分析能力。循环肿瘤细胞(Circulating tumor cells,CTCs)是指从原发瘤脱落并进入血液循环系统的癌细胞,近年来已逐渐被认可为肿瘤转移的重要因素之一,并且有希望作为临床上早期检测和监控肿瘤患者治疗效果的一种有效手段

三阴性乳腺癌(triple-negative breast cancers,TNBC)是指雌激素受体(ER)、孕激素受体(PR)和人表皮生长因子受体(HER2)均阴性的一种特殊类型乳腺癌,约占所有乳腺癌的15%。目前TNBC因缺乏内分泌及抗HER2治疗的靶点,所以尚无针对性的标准治疗方案。

美国加州大学洛杉矶分校的Magbanua MJ等人联合多个研究机构共同对转移性三阴性乳腺癌循环肿瘤细胞进行检测和分析,在一项治疗的前瞻性研究中利用两种方法对三阴性乳腺癌患者的CTCs细胞进行计数。该结果提前电子出版于2014年12月18日的Clinical Cancer Research杂志上。

试验评价了两种系统:(1)The CellSearch system,价格较便宜,并经过美国FDA认证;(2)IE/FC,利用基于EPCAM的免疫磁珠富集后流式细胞术分选。两种方法分别对转移性三阴性乳腺癌患者血液中CTCs计数。在一项多中心的II期临床试验中(Translational Breast Cancer Research Consortium,TBCRC 001),分别在入组时和接受西妥昔单抗±卡铂治疗7-14天后检测CTC数量。

结果显示:两种方法检测的CTC数量在基线时(r=0.62)和治疗7-14天时(r=0.53)均显著相关。基线CTC数量与肿瘤进展时间(time to progression,TTP)无相关;治疗7-14天后CTC数量与TTP显著相关(CellSearch p=0.02, IE/FC p=0.03)。两个时间点的CTC数量均与整体存活率(overall survival,OS)显著相关[CellSearch: 基线 (p=0.0001),7-14天 (p<0.0001); IE/FC: 基线 (p=0.0009),7-14天 (p=0.0086)]。

因此研究人员得出结论,两种计数方法获得结果高度一致。两种计数方法均显示转移性三阴性乳腺癌患者TTP和OS均与CTC数量显著相关。此外,IE/FC方法更易获得单性状CTC亚群的分离从而易于后续进行基因组分析。

原始出处

Magbanua MJ1, Carey LA2, DeLuca A3, Hwang J4, Scott JH5, Rimawi MF6, Mayer E7, Marcom PK8, Liu MC9, Esteva FJ10, Park JW5, Rugo HS11.Circulating tumor cell analysis in metastatic triple-negative breast cancers.Clin Cancer Res. 2014 Dec 18

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    2014-12-28 xlysu

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