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Cell Rep:厦门大学李勤喜课题组发表细胞凋亡研究论文

2017-04-18 佚名 生物帮

近日,国际著名学术杂志《Cell》子刊《Cell Reports》杂志在线发表了厦门大学生命科学学院李勤喜教授课题组在Cell Reports上在线发表题为“IDH1 Mutation Promotes Tumorigenesis by Inhibiting JNK Activation and Apoptosis Induced by Serum Starvation”的研究论文,研究揭示了ID

近日,国际著名学术杂志《Cell》子刊《Cell Reports》杂志在线发表了厦门大学生命科学学院李勤喜教授课题组在Cell Reports上在线发表题为“IDH1 Mutation Promotes Tumorigenesis by Inhibiting JNK Activation and Apoptosis Induced by Serum Starvation”的研究论文,研究揭示了IDH1 R132突变体产生的致癌代谢物2-HG通过抑制JNK的激活,帮助细胞逃避生长因子缺失诱导的细胞凋亡,进而促进肿瘤发生的机理。江彬,张佳和夏金梅为该论文的共同第一作者。

细胞凋亡是人体防癌抑癌的主要屏障,正常细胞拥有精密的监控机制,时刻感受细胞内外环境的变化,细胞一旦接受致死水平的胁迫刺激,就会立即启动凋亡程序,从而防止细胞癌变。研究证实严重的DNA损伤、信号分子失衡及生长因子缺失都能引起细胞凋亡。

在这项研究中,研究人员发现在血清饥饿的情况下,正常细胞中Cdc42能够结合MLK3,解除MLK3的自我抑制,进而激活MLK3-MKK4/7-JNK-Bim凋亡信号通路。在IDH1突变细胞中,累积的2-HG能够结合Cdc42,抑制Cdc42与MLK3的结合,使MLK3维持在自我抑制状态,抑制细胞凋亡。裸鼠移植瘤实验证明这一机制促进了IDH1突变体细胞的成瘤。临床胶质瘤样品中也证实携带IDH1 R132H突变的胶质瘤的JNK活性受到显着的抑制。

总之,该研究揭示了IDH1 R132突变体促进肿瘤发生的新机理,并为相关肿瘤的治疗提供了理论依据。

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    2017-05-30 xqptu
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    2018-03-30 维他命
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    2017-04-22 hongweicheng

    还是不错的

    0

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    2017-04-19 1ddf3e1dm99(暂无匿称)

    学习了,谢

    0

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    2017-04-19 卡圣

    学习了,谢谢分享

    0

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    2017-04-18 三生有幸9135

    学习一下谢谢分享

    0

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