Am J Pathol:预测三阴性乳腺癌疾病结果的生物标记物

2014-12-08 佚名 生物谷

“三阴性”乳腺癌(TNBC)患者的癌细胞不表达雌激素受体,孕激素受体和/或人类表皮生长因子受体2。由于缺少预测生物标记,“三阴性”乳腺癌的治疗方法是很困难选择的。 现在,研究人员报告说,肿瘤微环境中的高水平miR-21,而不是在上皮癌细胞中的miR-21与三阴乳腺癌患者更差的临床结果相关联,从而识别三阴乳腺癌的一个潜在预后生物标志物,研究发表于The American Journal of P

“三阴性”乳腺癌(TNBC)患者的癌细胞不表达雌激素受体,孕激素受体和/或人类表皮生长因子受体2。由于缺少预测生物标记,“三阴性”乳腺癌的治疗方法是很困难选择的。

现在,研究人员报告说,肿瘤微环境中的高水平miR-21,而不是在上皮癌细胞中的miR-21与三阴乳腺癌患者更差的临床结果相关联,从而识别三阴乳腺癌的一个潜在预后生物标志物,研究发表于The American Journal of Pathology杂志上。

三阴乳腺癌占15%至20%的乳腺癌病例,且相对于其他主要亚组,三阴乳腺癌患者具有更短的无复发存活(RFS)和乳腺癌特异性存活率(CSS)。miRNA是短链非编码RNA,在以前的工作中,研究人员证实miR-21与结肠癌胰腺癌和乳腺癌不良结果相关。

这项研究的目的是更详细探索miR-21对三阴乳腺癌患者结果的影响,分析miR-21的表达程度和miR-21表达的位置。现在,科学家有理由相信,改变肿瘤周围微环境(由基质细胞,免疫细胞,细胞外基质及细胞因子/趋化因子组成的复杂环境)可能比变化癌细胞内环境更为重要。

用原位杂交/免疫组织化学(ISH/IHC)进行测定分析901例非转移性浸润性乳腺癌女性患者的癌组织样品。901例子中有42.8%(386例)的患者发现有miR-21表达。使用荧光显微镜, 694例被确定为无或低表达组或中表达组,以及207例被确定为高表达组。在多变量分析后(调整了年龄,肿瘤大小和分级等因素),研究人员发现相比低表达组,高表达miR-21组表现出显著短RFS(危险比(HR)为1.71; P <0.001)和CSS(HR为1.96,P <0.001)。

在调查评估肿瘤微环境中的高水平miR-21表达对疾病结果的贡献过程中,发现20例患者发现只有上皮癌细胞特异性表达miR-21,187例miR-21主要表达于肿瘤基质中。他们发现,对于TNBC患者,肿瘤基质miR-21高水平妇女的疾病结果三倍恶化于miR-21表达于其他位置的患者。

原始出处

MacKenzie TA1, Schwartz GN1, Calderone HM2, Graveel CR2, Winn ME3, Hostetter G4, Wells WA5, Sempere LF6.Stromal Expression of miR-21 Identifies High-Risk Group in Triple-Negative Breast Cancer.Am J Pathol. 2014 Dec;

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    2015-08-28 wjywjy
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    2015-05-01 yb6560
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    2014-12-10 xlysu

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