Br J Cancer:FOXP3和PD-L1或可成为化生性乳腺癌的潜在治疗靶标

2020-09-22 xiaozeng MedSci原创

化生性乳腺癌(MBC)是一种罕见的乳腺癌亚型,占浸润性乳腺癌的0.2–5%。MBC具有异质性,其特征表现为肿瘤细胞可分化为包括鳞状、梭形、骨、软骨样等多种组织类型。MBC是一种经典的三阴性

化生性乳腺癌(MBC)是一种罕见的乳腺癌亚型,占浸润性乳腺癌的0.2–5%。MBC具有异质性,其特征表现为肿瘤细胞可分化为包括鳞状、梭形、骨、软骨样等多种组织类型。MBC是一种经典的三阴性乳腺癌(TNBC),缺乏可用于临床靶向治疗的生物标志物ER(雌激素受体)、PR(孕激素受体)和HER2( 人表皮生长因子受体2)的表达。因此,细胞毒性化疗是该疾病的唯一的系统性治疗选择。

该研究显示,靶向PD-L1(程序性死亡配体1)和Tregs(免疫抑制性T细胞)的新兴免疫疗法或可成为化生性乳腺癌患者的一个有效的治疗方法。

MBC中的肿瘤浸润淋巴细胞

研究人员通过免疫组化实验评估PD-L1和FOXP3的表达水平,并化生性乳腺癌患者队列中肿瘤浸润淋巴细胞(TILs)的水平以及患者的生存数据。

PD-L1在MBC中的表达及对预后的影响

研究人员发现,相比于三阴性导管癌,化生性乳腺癌中PD-L1阳性的肿瘤细胞显著富集,而PD-L1阳性的TIL细胞则无显著差异。同时,在化生性乳腺癌中表达FOXP3的TIL细胞也显著富集,其中FOXP3阳性的肿瘤内TIL细胞(iTIL)与患者的不良预后密切相关。多变量分析显示iTIL细胞中FOXP3的表达状态是患者生存的一个重要的独立性预后指标。


综上,该研究结果揭示了FOXP3、PD-1/PD-L1和肿瘤浸润淋巴细胞在化生性乳腺癌中的临床意义和预后价值,并证实免疫疗法或可成为一部分化生性癌的潜在的治疗手段。


原始出处:

Kalaw, E., Lim, M., Kutasovic, J.R. et al. Metaplastic breast cancers frequently express immune checkpoint markers FOXP3 and PD-L1. Br J Cancer (17 September 2020).

 

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    2020-11-08 zhs3890
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    2020-09-24 smartjoy
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    2020-09-24 zhaojie88
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    2020-09-22 希波克拉没有底

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