突变的p53通过梅瓦酸途径破坏了乳腺组织结构
William A Freed-Pastor1, Hideaki Mizuno, Xi Zhao
1Department of Biological Sciences, Columbia University, New York, NY 10027, USA.
Cell
|January 24, 2012
概括
突变的p53驱动乳腺癌,通过上调调节甲基酸路径,改变细胞结构. 用他类药物准这种途径为p53突变瘤提供了潜在的治疗策略.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
背景情况:
- 人类癌症中p53瘤抑制基因的突变很常见.
- 突变的p53蛋白质可以促进瘤的发展和进展.
- 与正常细胞相比,乳腺癌细胞在3D培养中表现出无组织的形态.
研究的目的:
- 调查突变p53在乳腺癌细胞形态中的作用,并确定潜在的分子机制.
- 探索美瓦酸途径作为p53-突变乳腺瘤的潜在治疗标.
主要方法:
- 利用乳腺上皮细胞的三维 (3D) 细胞培养模型.
- 进行全基因组表达分析以确定受突变p53.3影响的途径.
- 研究了他类药物和固醇生物合成中间体对细胞表型的影响.
- 通过转录因子分析,分析了突变p53与固醇基因促进者的关联.
- 与人类乳腺瘤数据集相关联的基因表达数据.
主要成果:
- 突变p53的消耗恢复了乳腺癌细胞中正常的状形态.
- 鉴定出甲酸途径受到突变p53.3的显著上调.
- 对于突变p53对组织架构的表型影响来说,甲酸盐途径是必要的,也是足够的.
- 突变p53与固醇基因促进体相互作用,部分通过SREBP转录因子.
- 固醇生物合成基因的高表达与人类乳腺瘤中的p53突变相关.
结论:
- 突变的p53驱动异常的乳腺组织架构通过调节上升的美瓦酸途径.
- 梅瓦酸途径是突变p53的致癌功能的一个关键调解者.
- 向美酸盐途径,可能是用他类药物,对于p53突变乳腺癌是一种有前途的治疗策略.
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