Department of Molecular Oral Pathology and Oncology, Graduate School of Medical and Dental Science, Kagoshima University, Kagoshima, Japan.
Department of Oral and Maxillofacial Surgery, Graduate School of Medical and Dental Science, Kagoshima University, Kagoshima, Japan.
PLoS One. 2024 May 31;19(5):e0300446. doi: 10.1371/journal.pone.0300446. eCollection 2024.
In cancer cells, the nuclear transport system is often disrupted, leading to abnormal localization of nuclear proteins and altered gene expression. This disruption can arise from various mechanisms such as mutations in genes that regulate nuclear transport, altered expression of transport proteins, and changes in nuclear envelope structure. Oncogenic protein build-up in the nucleus due to the disturbance in nuclear transport can also boost tumor growth and cell proliferation. In this study, we performed bioinformatic analyses of 23 key nuclear transport receptors using genomic and transcriptomic data from pancancer and head and neck squamous cell carcinoma (HNSCC) datasets from The Cancer Genome Atlas (TCGA) and Cancer Cell Line Encyclopedia and found that the total alteration frequency of 23 nuclear transport receptors in 2691 samples of the PCAWG Consortium was 42.1% and a high levels of genetic alterations was significantly associated with poor overall survival. Amplification was the most common type of genetic alterations, and results in the overexpression of nuclear transport receptors in HNSCC compared to normal tissues. Furthermore, our study revealed that seven out of eight cell cycle genes (CDK1, CDK2, CDK4, CDK6, CCNA1, CCNB1, and CCNE2) were significantly and positively correlated with nuclear transport receptor genes in TCGA pancancer and CCLE datasets. Additionally, functional enrichment analysis showed that nuclear transport receptor genes were mainly enriched in the adhesion junction, cell cycle, ERBB, MAPK, MTOR and WNT signaling pathways.
在癌细胞中,核转运系统经常被打乱,导致核蛋白的异常定位和基因表达的改变。这种干扰可能源于多种机制,如调节核转运的基因发生突变、转运蛋白表达改变以及核膜结构改变。由于核转运的干扰,致癌蛋白在核内的堆积也会促进肿瘤生长和细胞增殖。在这项研究中,我们使用来自癌症基因组图谱(TCGA)和癌症细胞系百科全书的泛癌和头颈部鳞状细胞癌(HNSCC)数据集的基因组和转录组数据,对 23 个关键核转运受体进行了生物信息学分析,发现 2691 个 PCAWG 联盟样本中 23 个核转运受体的总改变频率为 42.1%,高水平的遗传改变与总体生存率差显著相关。扩增是最常见的遗传改变类型,导致 HNSCC 中核转运受体的过度表达与正常组织相比。此外,我们的研究还表明,在 TCGA 泛癌和 CCLE 数据集中,八个细胞周期基因(CDK1、CDK2、CDK4、CDK6、CCNA1、CCNB1 和 CCNE2)中有七个与核转运受体基因显著正相关。此外,功能富集分析表明,核转运受体基因主要富集在黏附连接、细胞周期、ERBB、MAPK、MTOR 和 WNT 信号通路中。