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PNAS:ROR1与TCL1基因相互作用推动慢性淋巴细胞白血病(CLL)发展

2014-01-07 佚名 生物通

来自加州大学圣地亚哥分校的研究人员报道称,当癌基因ROR1与另外一种癌基因组合到一起时会加速慢性淋巴细胞白血病(CLL)的进程,在小鼠体内促成更快速发展、更具侵袭性的CLL形式。【原文下载】 这些发表在12月30日《美国科学院院刊》(PNAS)上的研究结果表明,ROR1有可能是慢性淋巴细胞白血病的一个重要的治疗靶点。慢性淋巴细胞白血病是最常见的一种血癌形式。在美国慢性

来自加州大学圣地亚哥分校的研究人员报道称,当癌基因ROR1与另外一种癌基因组合到一起时会加速慢性淋巴细胞白血病(CLL)的进程,在小鼠体内促成更快速发展、更具侵袭性的CLL形式。【原文下载】

这些发表在12月30日《美国科学院院刊》(PNAS)上的研究结果表明,ROR1有可能是慢性淋巴细胞白血病的一个重要的治疗靶点。慢性淋巴细胞白血病是最常见的一种血癌形式。在美国慢性淋巴细胞白血病的患病率非常的高:40岁以上的人群中,每20个人就有1人血液中有明显的癌变前CLL样细胞。每年这些人有可能形成真正的慢性淋巴细胞白血病的比率为大约1%。美国每年的新确诊慢性淋巴细胞白血病病例超过15,000例。每年大约有4,400名慢性淋巴细胞白血病患者死亡。

课题领头人、癌症研究教授Thomas Kipps及同事们,在研究工作中连续获得了一系列有关ROR1的研究发现。例如,以往他们发现了ROR1与上皮间质转化有关。CLL细胞利用了ROR1来传播疾病。这一称之为癌症转移的过程,导致了90%的癌症相关死亡。

在这篇PNAS论文中,Kipps和同事们构建出了表达人类ROR1的转基因小鼠,随后观察到这些小鼠生成了与人类CLL细胞相似的异常B细胞,而非转基因同胞小鼠则没有生成这样的细胞。

随后,他们让这种ROR1小鼠与另一种生成TCL1癌基因的转基因小鼠交配。这些杂交小鼠的后代具有ROR1和TCL1两种癌基因,并显示出更大的倾向形成侵袭性、快速发展慢性淋巴细胞白血病。

当研究人员采用一种抗ROR1单克隆抗体降低ROR1水平来治疗小鼠时,CLL细胞受损,更易受到治疗的影响。基于这些研究结果,Kipps和加州大学圣地亚哥医学院Moores癌症中心的研究人员,计划在2014年利用一种对表达ROR1的人类白血病细胞或癌细胞具有相同活性的人类单克隆抗体来展开一些临床试验。

原文出处:

George F. Widhopf II, Bing Cui, Emanuela M. Ghia, Liguang Chen, Karen Messer, Zhouxin Shen,Steven P. Briggs, Carlo M. Croce, and Thomas J. Kipps. ROR1 can interact with TCL1 and enhance leukemogenesis in Eµ-TCL1 transgenic mice. PNAS, December 30, 2013; doi:10.1073/pnas.1308374111【原文下载】

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    2014-02-13 drwjr
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    2014-01-09 ylz8405

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