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ASCO 2014:高TIMP-1水平可作为EGFR抑制疗法生物标志物

2014-05-21 佚名 dxy

目前,RAS状态是表皮生长因子受体(EGFR)抑制剂用于转移性结直肠癌(mCRC)治疗患者选择的唯一生物标志物。然而,并不是所有的KRAS野生型肿瘤均对EGFR抑制产生响应,一些KRAS突变型肿瘤患者也可从治疗中获益。若想提高患者EGFR受体抑制剂治疗选择性,还需开发新的生物标志物。 金属蛋白酶等离子体组织抑制剂-1(TIMP-1)诱发细胞内信号以激活Akt-生存通路。丹麦哥本哈根大学研究人员提出

目前,RAS状态是表皮生长因子受体(EGFR)抑制剂用于转移性结直肠癌(mCRC)治疗患者选择的唯一生物标志物。然而,并不是所有的KRAS野生型肿瘤均对EGFR抑制产生响应,一些KRAS突变型肿瘤患者也可从治疗中获益。若想提高患者EGFR受体抑制剂治疗选择性,还需开发新的生物标志物。

金属蛋白酶等离子体组织抑制剂-1(TIMP-1)诱发细胞内信号以激活Akt-生存通路。丹麦哥本哈根大学研究人员提出假设:高TIMP-1水平与EGFR信号相互作用,影响EGFR抑制剂抗肿瘤效果。并通过NORDIC VII临床研究对上述假设进行检测。

研究人员将转移性结直肠癌患者随机分配至两组,FLOX化疗联合西妥昔单抗组和FLOX化疗组(Tveit et al., JCO, 2012)。研究人员使用MAC15抗体动态ELISA法对426份治疗前患者血浆样本TIMP-1进行分析。

所有患者的单变量Cox分析显示治疗前高血浆TIMP-1水平与更短的无进展生存期(PFS)及总生存期(OS)显著相关。多变量分析结果显示,高血浆TIMP-1水平是独立的OS生物标志物。与未经西妥昔单抗治疗患者相比,西妥昔单抗治疗可大大延长高TIMP-1水平KRAS基因突变肿瘤患者OR(风险比[HR] 0.48)。

高血浆TIMP-1水平的KRAS基因突变肿瘤患者更易EGFR抑制治疗获益。高TIMP-1水平可作为转移性结直肠癌患者EGFR抑制治疗新生物标志物。

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    2015-01-30 quxin068
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    2014-05-23 liuyiping
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过去的15年里,晚期结直肠癌的治疗有了很大的进展。直到20世纪90年代末,结直肠癌仍被认为是对化疗抵抗的疾病,只能应用氟尿嘧啶进行姑息治疗。然而,现在有很多可行的治疗方案。化疗和生物学药物(包括EGFR或VEGF抗体)的联合一线治疗,以及疾病进展时不同的有效药物序贯应用,能够明显改善预后。参与临床试验的患者的生存期的中位数经常超过2年。患者一开始肝转移灶不能手术切除,在治疗后可变为可以手术切除

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