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这种 lncRNA PACER 通过 COX-2 信号和 RNA 结构动力学来调节肺腺癌表型
Samuel Z Desind1, Samira K Bell1, Robert L Merritt2
1Department of Microbiology, Biochemistry, and Molecular Genetics, Rutgers Biomedical & Health Sciences, New Jersey Medical School, School of Graduate Studies, Newark, NJ 07103.
bioRxiv : the preprint server for biology
|December 25, 2025
概括
长非编码RNA PACER通过控制COX-2表达和影响细胞生长和侵入来调节肺腺癌的进展. 包装 包装 包装 包装
科学领域:
- 分子生物学分子生物学
- 癌症研究 癌症研究
- 在RNA生物学,RNA生物学.
背景情况:
- 长非编码RNAs (lncRNAs) 是细胞过程和疾病的关键调节者,包括癌症.
- 肺腺癌 (LUAD) 中失调的lncRNAs会影响免疫和炎症途径,例如酸 (AA) 途径.
- 循环氧化酶-2 (COX-2) 是AA途径中的关键酶,与癌症发展有关.
研究的目的:
- 为了研究 lncRNA PACER 在肺腺癌中的功能作用.
- 确定PACER如何调节COX-2表达并影响LUAD细胞行为.
- 阐明PACER的结构组织和潜在的监管机制.
主要方法:
- 在A549 LUAD细胞中,稳定的shRNA介导的PACER敲除.
- 生物信息学分析 (LncLOOM) 寻找保存的基因和miRNA结合部位.
- 选择性2'-基乙化通过原料扩展和突变分析 (SHAPE-MaP) 进行分析,以确定次要结构.
- 超折叠分析和 ΔSHAPE 用于结构洞察和构造分析.
主要成果:
- PACER静音降低了COX-2表达,细胞增殖,迁移和LUAD细胞的入侵.
- 生物信息分析确定了保存的基因和潜在的miRNA结合部位 (miR-18a-5p,miR-196-5p,miR-1306-5p,miR-423-3p).
- SHAPE-MaP和SuperFold揭示了一个紧的5'域和灵活的中央/3'区域,其中有两个主导的体内形状,表明模块化架构.
- 与NF-κB p50结合和miRNA位点相关的结构域,表明构造性切换调节了可访问性.
结论:
- PACER是一种功能性lncRNA,通过COX-2信号调节LUAD的增殖和入侵.
- PACER的结构支持一个结构转换的机制,以调节蛋白质和miRNA相互作用.
- 帕克是炎症性肺癌的潜在生物标志物和治疗标.
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