Br J Cancer: HRMA识别KRAS突变优于直接测序

2012-07-23 魏冬 医学论坛网

  《英国癌症杂志》(Br J Cancer)近期发表的一项研究表明,高分辨率熔解分析(HRMA)识别KRAS突变(KRAS-MUT)患者敏感性优于直接测序,提示HRMA在挑选抗表皮生长因子受体(EGFR)抗体适用患者方面比直接测序更为有效。   抗EGFR单克隆抗体适用于治疗KRAS野生型(WT)转移性结直肠癌(mCRC),临床常用直接测序法筛选这类患者,但由于肿瘤基因异质

  《英国癌症杂志》(Br J Cancer)近期发表的一项研究表明,高分辨率熔解分析(HRMA)识别KRAS突变(KRAS-MUT)患者敏感性优于直接测序,提示HRMA在挑选抗表皮生长因子受体(EGFR)抗体适用患者方面比直接测序更为有效。

  抗EGFR单克隆抗体适用于治疗KRAS野生型(WT)转移性结直肠癌(mCRC),临床常用直接测序法筛选这类患者,但由于肿瘤基因异质性可能导致假阴性结果。该研究评估了HRMA识别KRAS-MUT肿瘤的功效。

  研究纳入了50例经直接测序确定为KRAS-WT、接受含西妥昔单抗化疗方案治疗的mCRC患者,并评估了HRMA发现与缓解率(RR)、无进展生存期(PFS)和总生存期(OS)的关联。

  结果显示,4例(8%)患者HRMA曲线异常,基因突变得到了基因克隆的验证。HRMA KRAS-WT患者的RR为28.3%。HRMA KRAS-MUT无缓解。

  HRMA KRAS-WT和HRMA KRAS-MUT患者的疾病控制率(缓解+疾病稳定)分别为58.7%和25%。

  HRMA KRAS状态与RR(P=0.287)或疾病控制(P=0.219)无关。

  HRMA KRAS-WT患者中位PFS[4.8 对 2.3个月,危险比(HR)=0.29,P=0.02]和OS(11.0 对 2.7 个月,HR=0.11,P=0.03)显著长于HRMA KRAS-MUT患者。

原文链接:

Malapelle U, Carlomagno C, Salatiello M, De Stefano A, De Luca C, Bianco R, et al.KRAS mutation detection by high-resolution melting analysis significantly predicts clinical benefit of cetuximab in metastatic colorectal cancer.British Journal of Cancer , (17 July 2012) | doi:10.1038/bjc.2012.275
 



    

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    2012-07-25 yinhl1978
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    2012-07-25 bioon7