Chen Hong, Guo Zhongrong, Li Peilong, Liao Wanxiang, Li Yunhao, Li Bo, Li Yan, Zhu Qingqing, Lu Yingsi, Huang Lifen, Xu Xiaoyu, Xiao Yunjun, Zhu Chengming, He Song, Zheng Guoxing
The Seventh Affiliated Hospital, Sun Yat-Sen University, Shenzhen, 518107, Guangdong, China.
Hepatopancreatobiliary and Splenic Surgery, Zhangzhou Affiliated Hospital of Fujian Medical University, Zhangzhou, 363000, Fujian, China.
Sci Rep. 2025 Jul 26;15(1):27223. doi: 10.1038/s41598-025-12522-5.
The transcription factor TP53 exhibits the preeminent frequency of genetic mutations across various cancer types. Long non-coding RNAs (lncRNAs) stand as pivotal molecules in the initiation and progression of carcinogenesis. Nonetheless, the specific roles of TP53-regulated lncRNAs in colon cancer remain largely unexplored. In this study, we conducted a comprehensive analysis of lncRNA and mRNA alterations in DLD1 colon cancer cells, induced by the overexpression of wild-type TP53, as well as two TP53 hotspot mutations, namely TP53-R175H and TP53-R175P, leveraging transcriptomic deep sequencing technology. Across all three experimental groups, large-scale datasets encompassing approximately 300 lncRNAs and 1000 mRNAs were identified. Integrative analyses, employing KEGG and Reactome functional annotations of differentially expressed lncRNA targets, coupled with enrichment of differentially expressed mRNAs, unveiled several shared downstream pathways. From this convergence, we curated a list of predicted TP53-regulated lncRNAs exhibiting differential expression patterns. Further pathway enrichments focusing on these lncRNAs converged on DNA replication and cell cycle processes, mirroring the well-established functions of TP53. Remarkably, lncRNA H19 and LINC00969 emerged as common denominators across all three cell groups, hinting at their potential as targets for further study in colon cancer. Collectively, our findings delineate the repertoire of potential TP53-regulated lncRNAs and their downstream signaling cascades in colon cancer cells, contingent upon TP53 overexpression or the presence of TP53-R175H/R175P mutations. This study underscores the intricacies of TP53 mutation functionality in colon tumorigenesis, orchestrated through multiple lncRNAs.
转录因子TP53在各种癌症类型中表现出极高的基因突变频率。长链非编码RNA(lncRNA)是致癌作用起始和进展过程中的关键分子。然而,TP53调控的lncRNA在结肠癌中的具体作用仍 largely未被探索。在本研究中,我们利用转录组深度测序技术,对野生型TP53以及两个TP53热点突变体(即TP53-R175H和TP53-R175P)过表达诱导的DLD1结肠癌细胞中的lncRNA和mRNA变化进行了全面分析。在所有三个实验组中,鉴定出了包含约300个lncRNA和1000个mRNA的大规模数据集。通过对差异表达的lncRNA靶标的KEGG和Reactome功能注释进行综合分析,并结合差异表达mRNA的富集分析,揭示了几条共同的下游途径。由此,我们整理出了一份预测的TP53调控的lncRNA列表,这些lncRNA表现出差异表达模式。进一步针对这些lncRNA的途径富集分析集中在DNA复制和细胞周期过程上,这反映了TP53已确立的功能。值得注意的是,lncRNA H19和LINC00969在所有三个细胞组中均出现,暗示它们有可能成为结肠癌进一步研究的靶点。总体而言,我们的研究结果描绘了在结肠癌细胞中,依赖于TP53过表达或TP53-R175H/R175P突变存在的情况下,潜在的TP53调控的lncRNA及其下游信号级联反应的全部情况。这项研究强调了TP53突变功能在结肠肿瘤发生中的复杂性,这是由多种lncRNA精心安排的。