Oncotarget:生物标志物预测脑癌治疗情况和效果

2014-07-11 佚名 生物谷

2014年7月10日讯 /生物谷BIOON/--近日,加州大学医学院圣地亚哥分校医学院研究人员发现了一种新的生物标志物,能预测是否胶质母细胞瘤(原发性脑肿瘤中最常见的形式)将回应化疗。该研究结果发表在Oncotarget杂志上。 加州大学圣地亚哥科圣地亚哥分校医学院医学博士Clark C. Chen说:每一个胶质母细胞瘤诊断病人都接受替莫唑胺化疗治疗,大约15%的患者获得持久的治疗益处。我们需

2014年7月10日讯 /生物谷BIOON/--近日,加州大学医学院圣地亚哥分校医学院研究人员发现了一种新的生物标志物,能预测是否胶质母细胞瘤(原发性脑肿瘤中最常见的形式)将回应化疗。该研究结果发表在Oncotarget杂志上。

加州大学圣地亚哥科圣地亚哥分校医学院医学博士Clark C. Chen说:每一个胶质母细胞瘤诊断病人都接受替莫唑胺化疗治疗,大约15%的患者获得持久的治疗益处。我们需要确定哪些患者将从替莫唑胺以及其他类型的治疗中获益,因为所有治疗均涉及风险和副作用,如果没有获益的可能性,病人不应该接受治疗。

为了查明哪些患者最有可能对替莫唑胺治疗响应,研究人员研究了控制一种蛋白--甲基鸟嘌呤甲基转移酶或MGMT表达的microRNA。这种蛋白质“挫伤”替莫唑胺的杀癌效果。高水平MGMT的肿瘤都与替莫唑胺治疗效益差有关。

科学家们系统地测试人类基因组中每个microRNA,以识别哪些抑制MGMT蛋白表达。发现,调节MGMT的microRNA签名预测胶质母细胞瘤患者对替莫唑胺的反应。这些结果将导致新的诊断工具,使能够确定哪些患者将从替莫唑胺治疗获得最大受益。

在这项研究中,科学家们还发现注射了调节MGMT的microRNA到成胶质瘤细胞中,能增加对替莫唑胺治疗的敏感性。

原始出处

Kushwaha D1, Ramakrishnan V2, Ng K3, Steed T4, Nguyen T4, Futalan D4, Akers JC4, Sarkaria J5, Jiang T6, Chowdhury D3, Carter BS4, Chen CC4.A genome-wide miRNA screen revealed miR-603 as a MGMT-regulating miRNA in glioblastomas.Oncotarget. 2014 May 14.

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    2014-09-18 闆锋旦
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Oncogene:阻止脑癌细胞增殖和迁移的关键性信号传导途径

多形性成胶质细胞瘤,图片来自Keith A. Johnson (keith@bwh.harvard.edu)和J. Alex Becker (jabecker@mit.edu) 脑癌很难治疗:它不仅顽强抵抗大多数化疗,而且足够灵活地从放疗或手术位点迁移到他处导致癌症再生。如今美国科罗拉多大学癌症中心研究人员开展的这项新研究表明如何阻止这两者发生。 特别的是,癌细胞给它们自己发送存活、生长、