Cell Rep:有效治疗白血病的潜在药物——PARP抑制剂

2014-08-27 佚名 生物谷

新加坡国立大学(NUS)癌症科学研究所科学家发现,一种最初设计用于杀灭DNA修复缺陷的癌细胞的药物,可能被用于治疗白血病和其他癌症。 新的研究表明poly (ADP-ribose) polymerase (PARP)抑制剂与标准化疗药物一起,可以更有效地防治白血病。在研究中,研究人员发现RUNX基因的失活导致DNA修复缺陷,并促进白血病和其他癌症的发展。这项研究发表在Cell Report

新加坡国立大学(NUS)癌症科学研究所科学家发现,一种最初设计用于杀灭DNA修复缺陷的癌细胞的药物,可能被用于治疗白血病和其他癌症。

新的研究表明poly (ADP-ribose) polymerase (PARP)抑制剂与标准化疗药物一起,可以更有效地防治白血病。在研究中,研究人员发现RUNX基因的失活导致DNA修复缺陷,并促进白血病和其他癌症的发展。这项研究发表在Cell Reports杂志上。

不像其他癌症更常见于中老年人,白血病在年轻人中有着高发病率。近年来,白血病的治疗突破性成果很少。RUNX家族基因是在白血病和其他癌症中最频繁失活的基因。根据先前的研究证实,RUNX1是在白血病中最频繁突变的基因之一,并且RUNX3与该疾病的发展相关联。

在这项研究中,研究小组也揭示了RUNX家族基因和一种罕见的人类先天疾病--范可尼贫血(fanconi anemia)之间有联系。这种疾病是由负责修复特定类型DNA受损的15个基因中的一个基因突变引起的。

在这项研究的早期阶段,研究人员发现RUNX缺陷导致血细胞生成出现障碍,异常造血细胞的大规模扩张。他们认识到这些临床表现是Fanconi anemia的症状,并开始调查RUNX在这个DNA修复途径中的功能。

进一步的研究表明RUNX蛋白质,通过促进招募参与DNA损伤修复的蛋白FANCD2到DNA损伤位点,在范可尼贫血中发挥关键和核心作用。RUNX和范可尼贫血的前所未知的关系,促使研究小组测试PARP抑制剂治疗白血病和有RUNX变异癌症的可能性。

研究人员以前没有想过这些类型的癌症(白血病)会有DNA修复缺陷,现在他们证明在细胞培养实验中,该药物有效的治疗白血病和其他癌症。该小组目前正在用异种移植模型进行进一步的药效试验。

原始出处

Wang CQ1, Krishnan V2, Tay LS2, Chin DW2, Koh CP2, Chooi JY2, Nah GS1, Du L2, Jacob B2, Yamashita N2, Lai SK2, Tan TZ2, Mori S2, Tanuichi I3, Tergaonkar V4, Ito Y5, Osato M6.Disruption of Runx1 and Runx3 Leads to Bone Marrow Failure and Leukemia Predisposition due to Transcriptional and DNA Repair Defects.Cell Rep. 2014 Aug 7

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    2015-07-22 维他命
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    2015-01-08 jklm09
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    2014-08-29 lishiwen

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