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揭示引发乳腺癌转移的新型分子信号通路

首页 » 研究 » 肿瘤 2014-11-17 转化医学网 赞(2)
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德克萨斯大学MD安德森癌症研究中心的研究人员报道了一种名为hedgehog的信号通路,是一种可引发多种癌症的特殊细胞信号通路,其或许就是乳腺癌发生转移的背后原因,而hedgehog信号通路往往会同长链非编码RNAs(lncRNAs)一起作用。

  一种名为长链非编码RNAs(lncRNAs)的分子往往参与了乳腺癌的发生,但目前科学家却并不清楚lncRNAs如何引发癌症的转移及肿瘤生长。
  近日一项来自德克萨斯大学MD安德森癌症研究中心的研究人员通过研究报道了一种名为hedgehog的信号通路,其是一种可以引发许多种癌症的特殊细胞信号通路,其或许就是乳腺癌发生转移的背后原因,而hedgehog信号通路往往会同lncRNA一起作用,这就如同BCAR4(一种致癌基因)往往会给肿瘤生长开绿灯一样。
  研究者Liuqing Yang博士表示,我们对BCAR4和hedgehog信号通路的研究为揭示lncRNA在恶性乳腺癌发展过程中的调节角色提供了新的依据,很多研究结果都显示,lncRNA是癌症发生和发展过程中的重要调节子。
  当hedgehog信号通路被诸如炎症趋化因子类的蛋白质异常激活时,其会通过名为GLI2的转录因子来增加控制基因的表达,而研究人员在文章中发现,BCAR4是GLI2控制基因表达所需要的,而通过hedgehog信号通路和GLI2介导的BCAR4的分子连接或许可以帮助研究人员理解乳腺癌发病过程中BCAR4和hedgehog信号通路之间的紧密连接。
  研究者Yang还指出,我们在文章中也揭示了一种名为“核酸锁定”(LNA)的乳腺癌疗法,以lncRNA的靶向疗法目前不能用于治疗乳腺癌中,研究者的目的是通过利用基于核酸锁定的疗法来揭示其潜在的治疗特性。当利用小鼠、人类组织和细胞系进行研究后研究人员发现,LNAs治疗乳腺癌扩散或许对于患者非常有益。
  最后研究人员发现,利用LNAs靶向作用BCAR4或许可以明显抑制乳腺癌的转移,BCAR4和hedgehog信号通路之间的关联或许为后期开发更有效治疗恶性乳腺癌的疗法提供新的思路和希望。(转化医学网360zhyx.com)
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转化医学网推荐的新闻阅读:

Molecules called long non-coding RNAs (lncRNAs) have been implicated in breast cancer but exactly why they cause metastasis and tumor growth has been little understood...until now.
Scientists at The University of Texas MD Anderson Cancer Center report that hedgehog, a unique cell signaling pathway known to contribute to many types of cancer, may be behind breast cancer metastasis. This molecular message service works with the lncRNA known as BCAR4 giving the genetic green light for tumor growth.
"Our study of BCAR4 and the hedgehog signaling pathway has provided evidence for lncRNAs' regulator roles in aggressive breast cancers progression," said Liuqing Yang, Ph.D., assistant professor of molecular and cellular oncology, whose findings are published in this month's issue of Cell. "Emerging evidence has revealed lncRNAs as a new class of players in the development and progression of cancer."
When the hedgehog signaling pathway is activated abnormally by proteins known as chemokines, it allows increased expression of genes controlled by a transcription factor called GLI2. Transcription factors are proteins that activate other genes. Yang's team found that BCAR4 is required for GLI2-controlled gene activation. This molecular "liaison" of BCAR4 via the hedgehog signaling pathway and GLI2 is the first understanding of the tie between hedgehog and BCAR4 in breast cancer......


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