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Clin Gastroenterol Hepatol:大肠癌筛查的新血液生物标志物

2014-10-28 佚名 生物谷

在搜寻可以用于筛查大肠癌(CRC)的血源性生物标志物过程中,研究人员发现两个有前途的候选标志物有望用于开发新的血液测试。 科学家们一直在探究参与CRC发展的分子机制,并且已确定异常的DNA甲基化模式和microRNAs的存在是大肠癌发生发展过程的主要参与者。在22nd United European Gastroenterology Week (UEG Week 2014)上,西班牙巴塞罗那消

在搜寻可以用于筛查大肠癌(CRC)的血源性生物标志物过程中,研究人员发现两个有前途的候选标志物有望用于开发新的血液测试。

科学家们一直在探究参与CRC发展的分子机制,并且已确定异常的DNA甲基化模式和microRNAs的存在是大肠癌发生发展过程的主要参与者。在22nd United European Gastroenterology Week (UEG Week 2014)上,西班牙巴塞罗那消化病医院临床研究所Antoni Castells博士说:我们现在能更好地了解参加CRC发展的分子事件,并且新的研究发现提供了有价值的靶标,其可以用于大肠癌的早期发现和新疗法的开发。

大肠癌是世界第三大常见癌症,在西方世界,是癌症相关死亡的第二大原因。在欧洲,参与大肠癌筛查项目的人数低得令人担心,Castells博士说:但一个简单的血液测试将鼓励更多的人挺身而出进行筛选,有可能每年挽救成千上万人的生命。

癌症生物标志物通常涉及到DNA、RNA或蛋白质表达改变,虽然有一些蛋白质生物标志物已被确定,然而,没有合适的标志物用于CRC筛查。直到最近,研究人员调查了CRC病人血液DNA,观察到异常的DNA甲基化模式,特别是DNA SEPT9异常甲基化,提示基于DNA的生物标志物是潜在的新筛查标志物。

由Castells博士列出的第二个潜在筛查方法包括评估microRNAs,microRNAs已被证明在CRC患者血浆中增加,由博士及其同事进行最近的一项研究中,他们发现CRC或晚期腺瘤患者的microRNA表达模式显著不同于健康人,研究小组得出结论:血浆microRNA的检测是CRC一种很有前途的筛选试验,值得进一步研究。

在这项初步研究中,大肠癌筛查的这两个潜在新标志物已经显示出潜力,应该在更大的患者群体中进一步探讨。

原始出处

Giráldez MD1, Lozano JJ, Ramírez G, Hijona E, Bujanda L, Castells A, Gironella M.Circulating microRNAs as biomarkers of colorectal cancer: results from a genome-wide profiling and validation study.Clin Gastroenterol Hepatol. 2013 Jun

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    2015-08-08 许安
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    2014-10-30 智智灵药
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