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肝脏瘤的发展. c-Jun对抗了p53的前性活动

Robert Eferl¹, Romeo Ricci, Lukas Kenner

¹Research Institute of Molecular Pathology (IMP), Dr. Bohrgasse 7, A-1030, Vienna, Austria.

|January 30, 2003

概括

转录因子c-Jun通过抑制亡,对早期肝癌的发展至关重要. 在小鼠中禁用c-Jun通过增加p53活性和亡来减少瘤生长.

科学领域:

在瘤学瘤学.
分子生物学分子生物学
肝病学肝病学是一种肝病学.

背景情况:

转录因子c-Jun在细胞增殖和存活中发挥作用,并且在癌症中经常被上调.
肝细胞癌 (HCC) 是一种常见的癌症,c-Jun在瘤发育中的特定作用尚未完全理解.

研究的目的:

调查c-Jun在小鼠化学诱导的HCC发展中的作用.
为了确定肝癌发生过程中对c-Jun的特定阶段要求.

主要方法:

在化学诱导的HCC的各个阶段,在小鼠中对c-Jun的肝脏特异性失活.
分析瘤发育,细胞增殖,细胞亡标志物 (p53,noxa) 和初级肝细胞对TNF-alpha的反应.

主要成果:

c-Jun无活化显著降低了肝脏瘤的数量和大小,特别是在启动后无活化时.
瘤发育受损与p53和noxa水平升高相关,导致亡增加.
缺乏c-Jun的肝细胞对TNF-α诱导的亡敏感度增加,这取决于p53.

结论:

c-Jun对抗p53的活性,从而防止HCC发育的早期阶段的亡.
这些发现揭示了c-Jun对肝癌发生的作用机制,并表明了潜在的治疗点.

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