NAT MED:标志乳腺癌的突变因子

2017-03-14 wang zhe MedSci原创

大约1-5%的乳腺癌归因于BRCA1或BRCA2中的遗传突变,并且对聚(ADP-核糖)聚合酶(PARP)抑制剂选择性敏感。

大约1-5%的乳腺癌归因于BRCA1或BRCA2中的遗传突变,并且对聚(ADP-核糖)聚合酶(PARP)抑制剂选择性敏感。

在其他癌症类型中,BRCA1和/或BRCA2(BRCA1 / BRCA2)中的种系和/或体细胞突变也赋予PARP抑制剂选择性敏感性。因此,需要寻求检测BRCA1 / BRCA2缺陷型肿瘤的测定法。

最近发现,体内重组,插入/缺失和重排模式或“突变特征”与BRCA1 / BRCA2功能障碍相关。在这里我们使用套索逻辑回归模型来识别预测BRCA1 / BRCA2缺陷的六个突出的突变特征。开发了称为HRDetect的加权模型以准确检测BRCA1 / BRCA2缺陷样品。 HRDetect鉴定BRCA1 / BRCA2缺陷的肿瘤,具有98.7%的灵敏度(曲线下面积(AUC)= 0.98)。将该模型在560例乳腺癌患者中应用,其中22例已知携带生殖系BRCA1或BRCA2突变,我们鉴定了其他带有体细胞缺失的22个肿瘤,以及具有BRCA1 /BRCA2功能性缺失却未检测到突变的47个肿瘤。我们分别使用乳腺癌,卵巢和胰腺癌样本验证了HRDetect,并证明其在改变测序策略中的作用。本研究整合所有类别的突变特征揭示了高达22%的乳腺癌的个体具有BRCA1 / BRCA2缺陷。远远高于PARP被抑制的选择性治疗敏感性个体 (~1–5%)比例。

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    2017-06-17 liye789132251
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    2017-03-16 卡圣

    好好学习,好文章谢谢分享

    0

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    2017-03-15 卡圣

    学习了,谢谢了

    0