题目:DNMT1-targeting remodeling global DNA hypomethylation for enhanced tumor suppression and circumvented toxicity in oral squamous cell carcinoma
期刊:Molecular Cancer
影响因子:37.3
研究单位:四川大学
原文链接:DNMT1-targeting remodeling global DNA hypomethylation for enhanced tumor suppression and circumvented toxicity in oral squamous cell carcinoma | Molecular Cancer | Full Text
# | Product Name | Catalog |
---|
1 | Anti-DNMT1 | EM1901-83 |
2 | Anti-GSK3 beta | ET1607-71 |
3 | Anti-Phospho-
GSK3 beta (S9) | ET1607-60 |
4 | Anti-PKM2 | ER1802-70 |
5 | Anti-mTOR | ET1608-5 |
6 | Anti-BrdU (Bu20a) | RT1081 |
Representative IHC images and analysis of DNMT1 in oral human samples including normal (n = 15), hyperplastic (n = 6), dysplastic (n = 7) and OSCC tissues (n = 22). Scale bars, 100 μm.
Western blot analysis of the indicated proteins in Cal27 and FaDu cells under the different conditions shown in the graph. Cells were treated with 1 µM BEZ235 for 24 h and 1 µM AT7519 for 8 h. GAPDH was used as an internal control.
该文章研究了在人类样本中口腔恶性转化过程中DNMT1表达的稳定增强,抑制其表达可显著降低体外和异种移植OSCC模型中的致瘤性。
DNMT1过表达伴随着口腔致癌过程中癌症特异性DNA低甲基化的积累;相反,DNMT1敲低导致癌细胞和异种移植肿瘤中异常广泛的全基因组DNA低甲基化。这种新的DNMT1重塑的DNA低甲基化模式阻碍了PI3K-AKT和CDK2-Rb的双重激活,并协同灭活了GSK3β。在治疗OSCC小鼠时,靶向DNMT1比PI3K抑制剂具有更大的抗癌效果,并降低了PI3K抑制剂或PI3K和CDK抑制剂组合引起的血糖变化的毒性以及不利的胰岛素反馈。靶向DNMT1可重塑一种新型整体DNA低甲基化模式,从而通过平衡信号协同作用提高抗癌效果并最大程度降低潜在毒性作用。研究表明DNMT1是OSCC命运和治疗结果的关键守门人。