通过MAD1的上调调节,使其对炎症介导的瘤形成敏感
Sarah E Copeland1, Santina M Snow2,3,4, Jun Wan5
1Molecular and Cellular Pharmacology Graduate Training Program, University of Wisconsin-Madison, Madison, Wisconsin, United States of America.
PLoS genetics
|October 7, 2024
概括
过度表达的线索性停滞缺陷1 (MAD1L1) 在小鼠中促进了结肠癌的发展. 这种上调导致染色体不稳定和瘤形成,特别是在男性中,突出MAD1L1
科学领域:
- 分子生物学分子生物学
- 在瘤学瘤学.
- 遗传学 是一个遗传学.
背景情况:
- 线粒体停滞缺陷1 (MAD1L1) 在结肠癌中过度表达,与生存率差相关.
- MAD1L1上调与细胞培养中的染色体不稳定性 (CIN) 和p53不稳定性有关.
研究的目的:
- 通过使用一种新型诱导性小鼠模型,研究MAD1L1过度表达在结肠瘤发生中的作用.
- 在体内评估MAD1L1上调对p53水平和线粒细胞缺陷的影响.
主要方法:
- 使用CRISPR/Cas9基因编辑生成了可诱导多西环素的MAD1L1小鼠模型.
- 使用硫酸德克斯 (DSS) 诱导炎症并促进结肠病变.
- 在过度表达MAD1L1的小鼠中分析了p53表达,线粒缺陷和瘤发育.
主要成果:
- 适度的MAD1L1过度表达 (2倍) 减少了p53和增加了小鼠结肠中的线粒性缺陷.
- 31%的MAD1L1过度表达的小鼠在DSS暴露后出现结肠病变,包括腺癌.
- 伤害发生率在男性中较高 (57%),并且发生在非炎症组织中.
结论:
- 在炎症的背景下,MAD1L1上调足以促进结肠瘤发生.
- MAD1L1在结肠癌的发展中发挥着关键作用,可能是通过CIN和p53的不稳定.
- 这项研究为研究MAD1L1在癌症中的作用提供了一个有价值的小鼠模型.
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