阿托克斯1-环素D1循环的活性对于具有失活TP53的瘤细胞的存活至关重要
Oleg A Kuchur1, Sofya S Pogodaeva1, Anna V Shcherbakova1
1National Research University ITMO, 197101 St. Petersburg, Russia.
蛋白质p53影响细胞分裂和化学抵抗. 在p53阴性瘤中,铜载体Atox1和环素D1形成反循环,增强增殖并提供新的治疗点.
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:
- 蛋白质p53对于调节细胞亡,DNA修复和细胞分裂至关重要,其损失在瘤中很常见,导致化学抵抗.
- 瘤细胞的增殖与过渡金属代谢有关,铜载体Atox1激活了环素D1的转录.
- p53和Atox1在调节环林D1和细胞周期进展方面具有相反的作用,但它们在细胞存活中的相互作用作用尚不清楚.
研究的目的:
- 研究Atox1,cyclin D1和p53基因状态在瘤细胞增殖中的相互作用.
- 了解Atox1-cyclin D1反循环在p53功能背景下对细胞存活的贡献.
主要方法:
- 利用了A549和HepG2细胞系,具有不同的TP53基因状态.
- 分析了ATOX1和CCND1.1的基因表达水平.
- 评估了基因抑制对亡的影响.
主要成果:
- 确定了Atox1和cyclin D1之间的积极反循环,其活性取决于TP53基因状态.
- 在A549和HepG2细胞中TP53的失活导致了ATOX1和CCND1.1的增强表达.
- 在p53-无活化的细胞中抑制ATOX1和CCND1导致显著的亡.
结论:
- 在Atox1,cyclin D1和p53状态之间的相互作用显著影响瘤细胞增殖和存活.
- 针对p53-阴性瘤中的Atox1-cyclin D1反循环,为联合癌症治疗提供了一个潜在的策略.
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