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ARCH PATHOL LAB MED:EGFR,丝裂原活化蛋白激酶和肺癌中磷脂酰肌醇3-激酶途径共存活化突变的临床验证

2019-02-06 MedSci MedSci原创

同一信号通路内的突变一般是是冗余的,因此大多数是相互排斥的。然而,实验室错误可能会引入意想不到的共存突变。本研究的目的验证表皮生长因子受体(EGFR),丝裂原活化蛋白激酶和磷脂酰肌醇3-激酶途径中的突变共存。

研究人员在这项针对临床诊断环境下回顾性研究中,利用下一代侧学技术在1208例非小细胞肺癌中检测了EGFRKRASNRASBRAFAKT1PIK3CA基因内突变的共存情况。

结果显示, EGFR突变不与BRAF突变共存,激酶激活突变和激酶受损突变均不存在。在BRAFEGFRKRAS突变的肺癌中,PIK3CA突变的发生率较低但类似(3.3-5.1%),并且在1208肺癌中有1例检测到罕见的KRASEGFR共存突变发生率(0.08%) )或226EGFR突变肺癌中的1例(0.4%)。在4AKT1中的3个中观察到BRAF p.V600E突变p.E17K突变共存的肺癌。通过另一种方法,证实了共存突变可能存在于相同(整体或亚克隆)群体或不同群体中,并澄清了最初在标本中报道的所谓共存激活KRASBRAF突变确实存在于所提交的单独的肺结节中。

研究结果支持EGFRBRAF突变是肺癌的早期驱动突变。有必要通过官方组织建立标准操作程序的指南,以验证意外的突变共存,如果有临床指示,则确定它们在相同或不同肿瘤群体中的情况。

原始出处:

Federico De Marchi, Lisa Haley, Henderson Fryer,Clinical Validation of Coexisting Activating Mutations Within EGFR, Mitogen-Activated Protein Kinase, and Phosphatidylinositol 3-Kinase Pathways in Lung Cancers

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    2019-07-12 yb6560
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    2019-02-08 redcrab
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    2019-02-08 liuyiping
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