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在Wnt/β-catenin信号通路中的eIF3a转化控制轴和结肠瘤发生
Zizheng Dong1, Anuj Ojha1, Lincoln Barlow1
1Department of Cell and Cancer Biology, The University of Toledo College of Medicine and Life Sciences, Toledo, OH, USA.
Cancer letters
|October 16, 2024
概括
Wnt/β-catenin通路通过通过eIF3a控制蛋白质合成来调节结肠癌. 这项研究揭示了eIF3a作为结肠瘤发生的关键因素,提供了一个新的治疗点.
科学领域:
- 分子生物学分子生物学
- 在瘤学瘤学.
- 基因表达规范 基因表达规范
背景情况:
- 翻译启动是一个关键的基因表达调节器,其失调与癌症等疾病有关.
- 在翻译控制和mTOR信号传递中,eIF4E/4E-BP通路的作用已经得到充分证明.
- Wnt/β-catenin通路在结肠瘤发生过程中至关重要.
研究的目的:
- 在结肠癌发育过程中研究一种新的转化控制轴,涉及eIF3a在Wnt/β-catenin信号通路中的eIF3a.
- 确定eIF3a在结肠瘤发生中的作用及其作为治疗点的潜力.
主要方法:
- 对eIF3a在人类结肠癌组织和腺瘤多样体中的表达的分析.
- 在eIF3a水平,β-catenin和APC突变之间的相关性研究.
- 在eIF3a过度表达的体外细胞转化试验.
- 研究eIF3a促进剂活性的Wnt/β-catenin通路调节.
- 使用APCmin/+小鼠进行体内研究,以评估eIF3a对结肠瘤发生的影响.
主要成果:
- 在人类结肠癌和癌前病变中,eIF3a的表达上调,与β-catenin水平和APC突变相关.
- 过度表达eIF3a促进肠道上皮细胞的转化.
- Wnt/β-catenin通路通过其促进体中的TCF/LEF结合位直接调节eIF3a的表达.
- 抑制eIF3a显著抑制了APCmin/+小鼠的自发结肠瘤发生.
结论:
- APC突变导致结肠癌中的eIF3a上调,在Wnt/β-catenin通路内建立了一个新的转化控制轴.
- eIF3a在结肠瘤发生中起着重要作用.
- eIF3a代表了结肠癌干预的有前途的治疗标.
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