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鉴定一种新的p65-p68循环:在瘤发生过程中对p68基因调节的关键决定因素
Mrinal K Ghosh1, Sunny Kumar1, Veenita Khare1
1Cancer Biology and Inflammatory Disorder Division, Council of Scientific and Industrial Research-Indian Institute of Chemical Biology (CSIR-IICB), TRUE Campus, CN-6, Sector-V, Salt Lake, Kolkata-700091 & 4, Raja S.C. Mullick Road, Jadavpur, Kolkata, 700032, India.; Academy of Scientific and Innovative Research, Ghaziabad, Uttar Pradesh, 201 002, India.
在RelA (p65) 和DEAD-boxRNA酶DDX5 (p68) 之间的新的反循环驱动着结直肠癌和质瘤的癌症生长. 抑制这种"p65-p68循环"抑制了瘤的进展,突出了它的治疗潜力.
科学领域:
- 分子生物学分子生物学
- 癌症研究 癌症研究
- 遗传学 是一个遗传学.
背景情况:
- 死亡盒RNA螺旋酶DDX5 (p68) 在结直肠癌 (CRC) 和质瘤等癌症中过度表达,这表明它作为生物标记物的作用.
- NF-κB信号通路组件RelA (p65) 与瘤发生有关,但其遗传调节机制,特别是关于p68,尚未得到充分探索.
研究的目的:
- 阐明p65和p68之间的新型转录正反机制在驱动瘤发生过程中的作用.
- 为了研究p65-p68相互作用对癌细胞行为的功能后果.
- 评估针对已识别的反循环的治疗潜力.
主要方法:
- 生物信息学分析以确定潜在的监管站点.
- 染色体免疫沉 (ChIP) 和光酶记者测定证实了p68的p65结合和转录调节.
- 在体外和体内研究评估p68表达对癌细胞增殖,迁移和入侵的功能影响.
- 使用Bay-11对IKK的药理抑制来评估对p65-p68循环和瘤原体表型的影响.
- 对来自患者的瘤样本进行分析,以关联p65和p68的表达.
主要成果:
- 在p68促进体中确定了功能NF-κB结合部位,证实p65可调节p68的表达,建立一个积极的反循环.
- 增加的p68表达在功能上与质瘤和CRC模型中的增强的增殖,迁移和入侵有关.
- 对IKK的药理抑制抑制了p65-p68循环和相关的瘤原体表型.
- 患者瘤样本显示p65和p68表达之间的正相关性,表明临床相关性.
结论:
- 确定了一种新的正转录反循环,即"p65-p68循环",它驱动着结直肠癌和质瘤的瘤发生.
- 这一循环对癌细胞的增殖,迁移和入侵有着显著的作用.
- 针对p65-p68循环,例如通过IKK抑制,为CRC和质瘤提供了一个有前途的治疗策略.
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