Clini Cancer Res:PD-L1表达与三阴性乳腺癌新辅助化疗预后的相关性

2020-07-26 MedSci原创 MedSci原创

既往研究表明三阴性乳腺癌患者可从PD-1轴免疫疗法中获益。因此,本研究评估PD-L1在肿瘤细胞和免疫细胞上的表达与TNBC患者采用新辅助度伐单抗联合化疗获益的相关性。

背景:

在转移背景下的IMpassion 130试验和新辅助化疗背景下的Keynote 522试验中,三阴性乳腺癌(TNBC)患者均从PD-1轴免疫疗法中获益。因此,本研究拟采用定量免疫组化方法来检测PD-L1在肿瘤细胞和免疫细胞上的表达,以评估PD-L1表达与TNBC患者采用新辅助度伐单抗联合化疗获益的相关性。

方法:

获取参与I/II期临床试验(NCT02489448)的患者的治疗前针刺活检组织(n=69),根据组织质量,最终分析纳入了45位患者(qCR=18、非-pCR=27)。

结果:

与非-pCR患者相比,pCR患者肿瘤细胞、CD58阳性细胞和基质上PD-L1的表达明显升高。在pCR和非pCR病例中,肿瘤或间质间室中CD68阳性细胞的数量没有差异

结论:

PD-L1在肿瘤细胞、间质免疫细胞中表达,并与CD68阳性细胞共定位,与TNBC患者采用度伐单抗联合化疗治疗的高pCR率相关。

原始出处:

Fahad Shabbir Ahmed,et al. PD-L1 protein expression on both tumor cells and macrophages are associated with response to neoadjuvant durvalumab in triple negative breast cancer (TNBC). Clinical Cancer Research. July,2020. DOI: 10.1158/1078-0432.CCR-20-1303

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    2020-07-28 smartjoy
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    2020-07-28 xlysu

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