尼古丁诱导的CHRNA5激活调节CES1的表达,影响头部和部状细胞癌的复发和通过MEK/ERK途径转移
Chen Feng1,2, Wei Mao1, Chenyang Yuan3
1Department of Otolaryngology, Head and Neck Surgery, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
Cell death & disease
|October 30, 2024
概括
尼古丁通过激活CHRNA5,通过MEK/ERK通路调节CES1,促进头癌 (HNSC) 的生长和扩散. 减少CHRNA5可以抑制这些效应,但尼古丁可以逆转这些效应.
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:
- 头部和部状细胞癌 (HNSCC) 与暴露在烟草烟雾中密切相关.
- 尼古丁乙胆受体 (nAChRs) 存在于头部和部粘膜上皮质中,但它们在HNSCC进展中的作用尚不清楚.
研究的目的:
- 研究CHRNA5在尼古丁诱导的头部和部状细胞癌 (HNSCC) 细胞的增殖,迁移和侵入中的作用.
- 阐明涉及CHRNA5介导HNSCC进展的信号通路和分子相互作用.
主要方法:
- 建立了暴露于尼古丁的HNSCC细胞模型.
- 评估了细胞增殖 (CCK-8,克隆基因分析),迁移 (伤口愈合) 和入侵 (Transwell分析).
- 研究了CHRNA5的淘汰/过度表达,其与CES1 (分子对接,co-IP,免疫光) 的相互作用,以及MEK/ERK通路 (西部斑).
- 在裸体小鼠中进行瘤形成测定,并分析临床HNSCC组织 (免疫组织化学).
主要成果:
- 尼古丁显著增强了HNSCC细胞的增殖,迁移和入侵,由CHRNA5上调调节介导.
- CHRNA5 knockdown 降低了这些侵略性的表型,而尼古丁则可以逆转这种效应.
- CHRNA5的敲击降低了CES1的表达,这表明了监管关系.
- 转录组学和西部斑分析显示CHRNA5敲击对MEK/ERK通路的影响,降低了p-MEK/MEK和p-ERK/ERK水平,而尼古丁反转了这一趋势.
- 瘤形成测定和临床组织分析支持CHRNA5在HNSCC进展中的作用.
结论:
- 尼古丁通过提高CHRNA5表达的调节来促进HNSCC的扩散,迁移和入侵.
- CHRNA5通过MEK/ERK信号通路调节CES1的表达.
- 向CHRNA5可能提供一种治疗策略,以抑制HNSCC复发和转移.
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