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Pan-cancer analysis of NUP155 and validation of its role in breast cancer cell proliferation, migration, and apoptosis
BMC Cancer volume 24, Article number: 353 (2024)
Abstract
NUP155 is reported to be correlated with tumor development. However, the role of NUP155 in tumor physiology and the tumor immune microenvironment (TIME) has not been previously examined. This study comprehensively investigated the expression, immunological function, and prognostic significance of NUP155 in different cancer types. Bioinformatics analysis revealed that NUP155 was upregulated in 26 types of cancer. Additionally, NUP155 upregulation was strongly correlated with advanced pathological or clinical stages and poor prognosis in several cancers. Furthermore, NUP155 was significantly and positively correlated with DNA methylation, tumor mutational burden, microsatellite instability, and stemness score in most cancers. Additionally, NUP155 was also found to be involved in TIME and closely associated with tumor infiltrating immune cells and immunoregulation-related genes. Functional enrichment analysis revealed a strong correlation between NUP155 and immunomodulatory pathways, especially antigen processing and presentation. The role of NUP155 in breast cancer has not been examined. This study, for the first time, demonstrated that NUP155 was upregulated in breast invasive carcinoma (BRCA) cells and revealed its oncogenic role in BRCA using molecular biology experiments. Thus, our study highlights the potential value of NUP155 as a biomarker in the assessment of prognostic prediction, tumor microenvironment and immunotherapeutic response in pan-cancer.
Introduction
Cancer adversely affects human health and quality of life worldwide. In addition to the number of newly diagnosed cancer cases, the burden of cancer is increasing due to rapid population aging [1, 2]. The breakthrough in immune checkpoint inhibitor (ICI) therapy has enabled the development of immunotherapy, which is a novel therapeutic approach that improves the clinical outcomes of patients with cancer [3, 4]. Therefore, there is a need to explore novel immunotherapeutic targets and their roles in tumor physiology and tumor immune microenvironment (TIME).
The nuclear pore complex (NPC), a specific protein complex for transmembrane transport, functions as a channel for importing and exporting nuclear molecules [5,6,7]. Dysfunctional NPC can lead to various diseases, including cancer [6, 8]. Nucleoproteins, which are the structural components of the NPC, regulate the progression of cancer through the following three main mechanisms: modulation of protein expression levels, induction of chromosomal translocations that result in the generation of fusion proteins, and induction of single point mutations [9, 10]. Various cancer cells, especially multidrug-resistant and aggressive tumor cells, exhibit upregulated levels of nuclear proteins, high rates of nucleoplasmic translocation, and dependency on the nuclear translocation system. This indicates that the nuclear translocation machinery can be a potential therapeutic target for cancer [11]. Additionally, nucleoplasmic transport inhibitors have been subjected to partial clinical trials as they are reported to effectively induce cancer cell death [12, 13]. NUP155 is actively involved in nuclear pore formation, as well as in selective gene regulation in pathological conditions [14,15,16]. Besides, a previously published study demonstrated that NUP155 mutations can result in specific phenotypes associated with atrial fibrillation in mice and humans [17]. Recent studies have reported that NUP155 expression is correlated with the prognosis of various cancers [18, 19]. Additionally, NUP155 activates the cell cycle protein-dependent kinase inhibitor p21 in the p53 (tumor suppressor) pathway and has a key role in the transcriptional response to DNA damage [20, 21]. Basit et al. demonstrated that the cGAS-STING-TBK1-IRF3 signaling-mediated regulation of p21 in the innate immune response affected chromosomal stability [22]. Thus, there is growing evidence linking NUP155 to tumor development. However, previous studies have not examined the role of NUP155 in tumor physiology and TIME in pan-cancer datasets.
This study aimed to comprehensively analyze the expression pattern, prognostic value, and immunological functions of NUP155 across 33 types of cancer. The correlation of NUP155 expression with DNA promoter methylation, somatic mutations, tumor mutational burden (TMB), microsatellite instability (MSI), tumor stemness, mismatch repair (MMR), TIME, infiltrating immune cell profile, and immune-related biomarkers was further investigated. Additionally, single-cell RNA sequencing dataset and immunotherapy cohort data analyses indicated that NUP155 is a potential biomarker for predicting the efficacy of immunotherapy. Furthermore, the oncogenic role of NUP155 in breast invasive carcinoma (BRCA) was validated using molecular biology experiments.
Methods
Data collection
The RNA sequencing and clinical data were downloaded from TCGA and GTEx databases with the UCSC Xena browser [23]. The expression data of tumor cell lines and tissues downloaded from the CCLE database were analyzed according to tissue origin. The UALCAN database [24] was used to examine the DNA methylation and protein levels of NUP155 between cancer and corresponding normal tissues. Tumor Immunology Single Cell Center (TISCH) [25], a single-cell RNA (scRNA) sequencing database of gene expression levels in the TIME, was used for characterizing NUP155 expression profiles in the microenvironment at the single-cell level. The response to immunotherapy was examined using two immunotherapy cohorts (GSE78220 cohort: patients with melanoma; Imvigor210 cohort: patients with metastatic uroepithelial carcinoma).
Pathological or clinical stage and prognosis
NUP155 expression in TCGA dataset was investigated at different pathological or clinical stages of pan-cancer using statistical methods, including Kruskal-Wallis Test and Dunn’s test [26,27,28]. When the data comprised < 3 samples or the standard deviation of the data was 0, stages I and II were combined for early-stage tumors or stages III and IV were combined for late-stage tumors before performing statistical analysis. The prognostic significance of NUP155 was examined using the univariate Cox proportional hazard model and Kaplan-Meier (KM) survival analysis with “survminer” R package. The best cut-off scores were used to determine the overall survival (OS), disease-specific survival (DSS), and progression-free survival (PFS) in the high-expression and low-expression cohorts.
TMB, MSI, and MMR analyses
The Simple Nucleotide Variation dataset of all TCGA samples processed using MuTect2 software was downloaded from Genomics Data Commons (GDC) [29]. The TMB for each tumor was determined using the “maftools” R package. Additionally, the MSI score was obtained from a previous study [30]. The expression level of MMR genes was assessed based on the expression profile data from TCGA [31, 32].
Somatic mutation and stemness score analyses
The cBioPortal website [33, 34] was used to analyze the correlation between NUP155 expression and somatic mutations among pan-cancer. To investigate the correlation between NUP155 expression and tumor stemness score, the gene expression data obtained from previous studies were integrated with the stemness score of each tumor, and the methylation feature was calculated.
Immune cell infiltration and immune modulator gene analyses
The immune and stromal fraction scores for various tumor samples were determined using the ESTIMATE algorithm. The correlation between NUP155 expression and the immune and stromal fraction scores was determined using the ‘estimate’ and ‘limma’ R packages. For reliable immune score assessment, xCell and CIBERSORT analyses were performed using the ‘IOBR’ R package. Next, co-expression analysis of NUP155 and immunoregulation-related genes was performed.
Drug sensitivity analysis
The correlation between NUP155 expression and drug sensitivity was analyzed using the Genomics of Drug Sensitivity in Cancer (GDSC) and Cancer Therapeutics Response Portal (CTRP) databases with the Gene Set Cancer Analysis (GSCA) platform [35]. Additionally, the correlation between NUP155 expression and sensitivity to 263 drugs approved by the Food and Drug Administration or undergoing clinical trials was examined using the CellMiner (NCI-60) database.
Construction of protein-protein interaction network (PPI) and functional annotation
GeneMANIA [36], which is a website designed to build PPI networks, provides gene function prediction hypotheses and identifies comparable genes. In this study, the PPI network for NUP155 was constructed using GeneMANIA to explore the interactions between NUP155 and NUP155-related genes.
The biological function of NUP155 in pan-cancer was examined using gene set enrichment analysis (GSEA). The gene sets of Gene Ontology (GO), Kyoto Encyclopedia of Genes and Genomes (KEGG), and REACTOME were downloaded from the GSEA website. The top 100 co-expressed genes were mapped using the R package ‘clusterProfiler’ for enrichment analysis.
Cell culture and quantitative real-time polymerase chain reaction (qRT-PCR) and western blotting analyses
Normal human breast cells (MCF-10 A cells) and breast cancer cell lines (BT-549, MDA-MB-231, and T-47D cells) were purchased from the National Collection of Authenticated Cell Cultures. The cells were cultured in a humidified atmosphere containing 5% CO2. The culture medium was regularly replaced until the cells achieved 80–90% confluency. The primer sequences for the human target gene NUP155 that were purchased from Biosepur were as follows: 5′-CTTAGTGTCTACCTGGCTGCTTGG-3′ (forward primer); 5′-TGATGCTGATGCTGATGCTTCTGG-3′ (reverse primer). Total RNA was extracted from the four cell lines using an RNA extraction kit (Takara). The extracted RNA was then reverse-transcribed to complementary DNA using the reverse transcription kit (Beyotime). qRT-PCR analysis was performed using an Exicycler 96 instrument (BIONEER). The expression levels of NUP155 were normalized to those of GAPDH. The relative expression levels of the target gene were calculated using the ΔΔCq method [37].
The small interfering RNA (siRNA) oligonucleotides targeting NUP155 (si-NUP155) and scrambled siRNA were designed and synthesized by General Biol Corporation (Anhui, China). The cells were transfected with si-NUP155, washed thrice with phosphate-buffered saline (PBS), and harvested using centrifugation. Total proteins were extracted using radioimmunoprecipitation assay buffer supplemented with a protease inhibitor cocktail (R0010, Solarbio). Western blotting analysis was performed using anti-NUP155 (66359-1-Ig, Proteintech), anti-ACTB (66009-1-Ig, Proteintech), anti-BAX (50599-2-Ig, Proteintech), and anti-BCL2 (68103-1-Ig, Proteintech) antibodies, following the manufacturer’s instructions. The blots were cut prior to hybridisation with antibodies during blotting. The secondary antibodies used in this study were horseradish peroxidase (HRP)-conjugated goat anti-mouse IgG (SA00001-1, Proteintech) or HRP-conjugated goat anti-rabbit IgG (SA00001-2, Proteintech). ACTB was used as a loading control. Immunoreactive signals were developed using an enhanced chemiluminescence reagent (4 A Biotech, China).
Cell viability assay
Cells were seeded at a density of 2000 cells/well in 96-well plates and cultured for 0, 24, 48, and 72 h. Next, the cells were incubated with 10 µL of cell counting kit-8 (CCK-8) solution for 120 min. The absorbance of the sample at 450 nm was measured.
Transwell assay
Cells were seeded in the upper chamber containing serum-free medium at a density of 2 × 106 cells/well. In the lower chamber, 500 µL of medium containing 20% fetal bovine serum was added. After incubation at room temperature and 5% (v/v) CO2 for 24 h, non-invasive cells in the upper chamber were removed. Meanwhile, the cells on the bottom surface were fixed using a 10% neutral buffered formalin solution and stained with 0.1% crystal violet. The invasive cells were counted in five randomly selected microscopic fields.
Wound healing assay
After treating logarithmic growth phase cells from the third to the fifth passage, the cells were seeded in six-well plates at a density of 1 × 106 cells/mL and cultured for 24 h in a CO2 incubator until they reached approximately 70% confluency. A sterile pipette tip was used to gently generate a horizontal scratch in the monolayer. The cells were gently washed thrice with PBS to remove detached cells. Next, the cells were cultured in a serum-free medium for 24 h in a CO2 incubator and fixed using a methanol solution. The closure of the cell scratch was monitored using an inverted microscope after crystal violet staining.
Statistical analyses
All statistical analyses were performed using R software (version 4.0.2) and GraphPad Prism 7. As the gene expression levels exhibited highly right-skewed distribution in TCGA dataset, the gene expression data were normalized using log-2 transformation (X to Log2(X + 1)). Survival was analyzed using Cox regression analysis, the KM method, and log-rank tests. The correlation between two variables was analyzed using Spearman or Pearson tests. To analyze the molecular biology experiment data, means between two groups were compared using the two-tailed Student’s t-test. Data are expressed as mean ± standard error of the mean. Differences were considered significant at P < 0.05. The R-scripts and online tools used in this study are shown in Supplementary Table S1.
Results
Differential expression ofNUP155 between normal and cancer tissues
Analysis of GTEx datasets revealed that the mRNA expression levels of NUP155 were comparable in all organs, except bone marrow and testis (Fig. 1A). The NUP155 expression levels were downregulated in most healthy tissues. Figure 1B shows the relative expression levels of NUP155 in different cell lines in the CCLE dataset. The NUP155 expression levels varied in different cancer cell lines with the small cell lung cancer cell line exhibiting upregulated expression levels. Analysis of NUP155 protein expression using the UALCAN database revealed that the NUP155 expression levels in head and neck squamous cell carcinoma (HNSC), glioblastoma multiforme (GBM), colon cancer, lung adenocarcinoma (LUAD), hepatocellular carcinoma (HCC), and clear cell renal cell carcinoma (RCC) were significantly upregulated when compared with those in the corresponding non-cancerous tissues (Fig. 2A). The NUP155 mRNA expression levels varied between tumor and non-cancerous tissue in 29 cancers (samples for which non-cancerous tissue data were not available were excluded) (Fig. 2B). Compared with those in non-cancerous tissues, the NUP155 expression levels were upregulated in adrenocortical carcinoma (ACC), bladder urothelial carcinoma (BLCA), BRCA, cervical squamous cell carcinoma and endocervical adeno carcinoma (CESC), cholangiocarcinoma (CHOL), colon adenocarcinoma (COAD), lymphoid neoplasm diffuse large B-cell lymphoma (DLBC), esophageal carcinoma (ESCA), GBM, HNSC, kidney chromophobe (KICH), kidney renal clear cell carcinoma (KIRC), kidney renal papillary cell carcinoma (KIRP), brain lower grade glioma (LGG), liver hepatocellular carcinoma (LIHC), LUAD, lung squamous cell carcinoma (LUSC), ovarian serous cystadenocarcinoma (OV), pancreatic adenocarcinoma (PAAD), prostate adenocarcinoma (PRAD), rectum adenocarcinoma (READ), skin cutaneous melanoma (SKCM), stomach adenocarcinoma (STAD), thymoma (THYM), uterine corpus endometrial carcinoma (UCEC), and uterine carcinosarcoma (UCS) tissues. In contrast, the NUP155 expression levels in acute myeloid leukemia (LAML), testicular germ cell tumor (TGCT), and thyroid carcinoma (THCA) tissues were downregulated when compared with those in non-cancerous tissues. The differential expression of NUP155 between cancer and non-cancerous tissues was the most pronounced in DLBC and THYM. However, NUP155 expression was not significantly different between cancer and non-cancerous tissues in mesothelioma (MESO), pheochromocytoma and paraganglioma (PCPG), and sarcoma (SARC).
Differential expression of NUP155 between normal and cancer tissues
NUP155 expression was significantly correlated with pathological or clinical stage in ACC, KICH, KIRC, KIRP, LIHC, OV, SKCM, and UCS (Supplementary Fig. 1). In particular, NUP155 expression was positively correlated with advanced tumor stage in ACC, KICH, KIRP, and LIHC.
Methylation profile and genetic alterations of NUP155
DNA methylation alterations in cancer are powerful diagnostic and prognostic targets. Analysis of the UALCAN dataset revealed that compared with those in non-cancerous tissues, the methylation levels of NUP155 were upregulated in BRCA, CESC, ESCA, HNSC, KIRC, LIHC, LUAD, LUSC, PAAD, SARC, and UCEC tissues and downregulated in COAD, PRAD, READ, and TGCT tissues (Fig. 3A and Supplementary Table S2). The cBioPortal database was used to investigate the NUP155 alterations in pan-cancer. The frequency of NUP155 alterations was the highest in non-small cell lung cancer (approximately 10%) (Fig. 3B). Amplifications and mutations were the most frequent genetic alterations.
Furthermore, the landscape of NUP155 copy number variation (CNV) in pan-cancer was examined. This study analyzed the correlation between NUP155 CNV and NUP155 mRNA levels using the GSCA online website. The NUP155 methylation levels were closely associated with NUP155 mRNA expression levels in various cancer types, including LUSC, LUAD, HNSC, SARC, BLCA, OV, BRCA, ESCA, CESC, STAD, SKCM, UCS, KIRC, KICH, COAD, LIHC, UCEC, KIRP, PCPG, READ, and LGG (Supplementary Fig. 2 and Supplementary Table S3).
Prognostic value of NUP155 expression in different cancer types
Next, this study examined the prognostic value of NUP155 in different cancer types using survival analyses. The three endpoints of this study were OS, DSS, and PFS. NUP155 expression was significantly correlated with OS in the following 19 types of cancer: ACC, BLCA, BRCA, COAD, ESCA, GBM, HNSC, KICH, KIRC, KIRP, LGG, LIHC, MESO, OV, PAAD, READ, SARC, THYM, and UCEC (Fig. 4A). The KM survival curves revealed that NUP155 upregulation was significantly correlated with poor OS in ACC, BRCA, KICH, KIRP, LGG, LIHC, MESO, and UCEC and favorable OS in KIRC, READ, and THYM (Fig. 4B–L). NUP155 expression was correlated with DSS in the following nine types of cancer: ACC, KICH, KIRC, KIRP, LGG, LIHC, MESO, THYM, and UCEC (Supplementary Fig. 3A). The KM survival curves indicated that NUP155 upregulation was associated with poor DSS in ACC, KICH, KIRP, LGG, LIHC, MESO, and UCEC and favorable DSS in KIRC, THYM, and UCEC (Supplementary Fig. 3B–J). Additionally, the effect of NUP155 dysregulation on PFS was investigated (Supplementary Fig. 4A). Univariate Cox regression analysis revealed that NUP155 expression is a risk factor for PFS in ACC, BRCA, KICH, KIRP, LGG, LIHC, MESO, UCEC, and uveal melanoma (UVM) and an active factor for PFS in KIRC (Supplementary Fig. 4B–K). KM analysis suggested that NUP155 upregulation was associated with unfavorable PFS in patients with ACC, BLCA, KICH, KIRP, LIHC, LGG, MESO, UCEC, and UVM and favorable PFS in patients with KIRC. Thus, NUP155 upregulation is associated with poor prognosis in most cancers.
Correlation of NUP155 expression with DNA methylation-based stem score (DNAss) and RNA methylation-based stem score (RNAss)
The upregulation of stem cell marker expression in tumor cells is strongly correlated with tumor recurrence, metastasis, and drug resistance. The expression of NUP155 exhibited varying degrees of correlation with DNAss (Fig. 5A) and RNAss (Fig. 5B) in different cancer types. NUP155 expression was associated with DNAss in 19 tumors. In particular, NUP155 expression was positively correlated with DNAss in BRCA, CESC, CHOL, glioma (GBMLGG), HNSC, KIRC, KIRP, pan-kidney cohort (KICH + KIRC + KIRP) (KIPAN), LGG, LUAD, LUSC, MESO, PAAD, stomach and esophageal carcinoma (STES), SARC, SKCM, STAD, and TGCT and negatively correlated with DNAss in BLCA. Additionally, NUP155 expression was positively correlated with RNAss in 30 tumors. Thus, NUP155 expression was correlated with DNAss and RNAss in several tumors and may potentially promote the activation of tumor stem cells and facilitate tumor recurrence and proliferation.
Correlation of NUP155 expression with TMB, MSI, and MMR genes
Immunotherapy markers are useful for screening patients who may benefit from the treatment as some patients do not respond to immunotherapy and experience severe immune-related side effects. Several clinical studies have demonstrated the promising predictive value of TMB. Tumor cells with a high TMB are easily recognized by the immune system. Consequently, immunotherapy increases the response rates and the survival rates in patients with a high TMB [38]. NUP155 expression was positively correlated with TMB in ACC, BLCA, BRCA, KICH, LAML, LGG, LUAD, LUSC, MESO, PAAD, SARC, SKCM, STAD, and UCEC and negatively correlated with TMB in THCA (Fig. 5D). MSI, which is characterized by deficiencies in the MMR proteins, is a well-recognized biomarker for ICI response. NUP155 expression was positively correlated with MSI in ACC, CESC, KIRC, LIHC, LUSC, MESO, OV, SARC, STAD, and UCEC and negatively correlated with MSI in DLBC, PRAD, SKCM, and THCA (Fig. 5C). We further explored the relationship between NUP155 expression and MMR genes (namely MLH1, MSH2, MSH6, PMS2, EPCAM). As shown in Fig. 5E, NUP155 expression was correlated with MMR genes in almost all cancers. These results indicate that NUP155 expression may determine the outcomes of ICI therapy in patients with cancer by influencing TMB, MSI, and MMR.
Correlation between NUP155 and TIME
Previous studies have demonstrated that the complexity and diversity of TIME regulate tumorigenesis and tumor progression. Thus, this study examined the correlation between NUP155 expression and TIME in pan-cancer. The eight tumors with the highest correlation coefficients are shown in Supplementary Fig. 5. Among these eight cancers, NUP155 expression was negatively correlated with both stromal and immune scores in GBM, STES, STAD, and SKCM. Meanwhile, NUP155 expression was negatively correlated with immune scores in TGCT, SARC, and KIPAN. These findings suggested a close correlation between NUP155 expression and the tumor microenvironment in different types of cancer.
Correlation of NUP155 expression with tumor-infiltrating immune cells (TIICs) and immune modulator genes
Comprehensive analysis of the correlation between NUP155 expression and the degree of immune cell infiltration in various cancer types was performed using the xCell database. NUP155 expression was negatively correlated with the levels of infiltrating immune cells, except CD4 + memory T cells, CD4 + T cells, common lymphoid precursors, granulocyte/macrophage precursors, myocytes, and Th2 cells (Fig. 6B). Moreover, the levels of 26 immune cell types were examined using the “CIBERSORT” algorithm. Correlation analysis revealed that NUP155 expression was positively correlated with the levels of infiltrating naïve B cells, CD4 + memory resting T cells, CD4 + memory activated T cells, dendritic cells, mast cells, macrophages, NK cells (resting), and neutrophils. In contrast, the levels of memory B cells, CD4 + naïve T cells, CD8 + T cells, follicular helper T cells, plasma cells, Treg cells, and activated NK cells were negatively correlated with NUP155 expression (Fig. 6A). Additionally, analysis at the single-cell level revealed the expression of NUP155 in various immune cells, including CD4 + T cells, CD8 + T cells, B cells, natural killer (NK) cells, monocytes, dendritic cells, and T regulatory (Treg) cells. In particular, NUP155 expression was upregulated in immune cells, especially in proliferative T cells (T prolif cells), Treg cells, and CD8 + exhausted T (Tex) cells, of patients with CRC, LIHC, SKCM, and NSCLC (Supplementary Fig. 6).
Tumor-induced immunosuppression is the primary mechanism through which cancers evade immune surveillance and attack. Tumors manipulate the immune response by modulating the immune checkpoint (ICP) pathway. In this study, gene co-expression analysis was performed to investigate the correlation between NUP155 expression and immune-related genes in various cancers. The heatmaps of the analyzed genes, including those encoding major histocompatibility complex (MHC) (Fig. 7A), immunosuppressive factors (Fig. 7B), chemokine receptors (Fig. 7C), immune activation factors (Fig. 7D), and chemokines (Fig. 7E), revealed a strong co-expression pattern between NUP155 and immune-related genes. NUP155 expression was positively correlated with the expression of immune-related genes in ACC, BLCA, HNSC, KICH, KIRC, KIRP, LIHC, PAAD, PCPG, PRAD, and UVM. However, a limited number of immune-related genes exhibited co-expression with NUP155 in CHOL.
PPI network of NUP155 and effect of NUP155 on drug response
A PPI network of NUP155 was constructed using the GeneMANIA online program to investigate the potential role of NUP155 in carcinogenesis. As shown in Fig. 8A and Supplementary Table S7, NUP155 physically interacted with NUP133, GLE1, REG1B, SNX5, and TACC2. Next, the correlation between NUP155 expression levels and drug sensitivity was analyzed using the CTRP and GDSC databases. In the CTRP dataset, NUP155 expression was negatively correlated with the sensitivity to drugs, such as trametinib, tivantinib, dinaciclib, and docetaxel (Fig. 8D and Supplementary Table S4). Meanwhile, in the GDSC dataset, NUP155 expression was positively correlated with the sensitivity to drugs, such as nutlin-3a (-) and 5-Fu (Fig. 8E and Supplementary Table S5). To further investigate the correlation between NUP155 expression and drug sensitivity in various cancer cell lines, the Cell Miner database was used. As shown in Fig. 8F, NUP155 expression was positively correlated with sensitivity to AT-13,387, allopurinol, and bosutinib and negatively correlated with sensitivity to isotretinoin.
Additionally, the correlation between NUP155 expression and patient prognosis after PD-1/PD-L1 immunotherapy was examined by analyzing two immunotherapy cohort datasets (GSE78220 and Imvigor210). GSE78220 comprises the data of patients with malignant melanoma who received anti-PD-1 immunotherapy, while Imvigor210 comprises the data of patients with urothelial carcinoma who received anti-PD-L1 therapy. The KM survival curve of the GSE78220 cohort revealed that NUP155 upregulation was associated with poor OS in patients with malignant melanoma (Fig. 8B). Meanwhile, the KM survival curve of the Imvigor210 cohort revealed that NUP155 upregulation was associated with beneficial OS in patients with urothelial carcinoma (Fig. 8C).
GSEA
GSEA revealed that NUP155 was enriched in multiple GO terms, including the negative regulation of NIK/NF-κB signaling, intermediate filaments, and RNA-mediated gene silencing. (Fig. 9A-E) KEGG analysis indicated that NUP155 was enriched in immune-related pathways, such as antigen processing and presentation, toll-like receptor signaling pathway, RIG-I-Like receptor signaling pathway, and allograft rejection. (Fig. 10A-E) GSEA of the REACTOME gene set collection suggested the enrichment of several immune and inflammatory functional pathways, including the class I MHC-mediated antigen processing and presentation pathway, adaptive immune system pathway, interleukin-1 signaling pathway, antigen processing via ubiquitination and proteasome degradation pathway, and MHC Class II antigen presentation pathway, in various cancers. NUP155 was enriched in cell cycle, mitotic spindle checkpoint, regulation of TP53 activity, DNA repair, and other pathways (Supplementary Fig. 7 and Supplementary Table S6). These findings suggest that NUP155 has a crucial role in the inflammatory response and TIME.
Differential expression of NUP155 in breast cancer cells and normal breast cells
According to Cancer Statistics 2022, breast, lung, and colorectal cancers account for 51% of all newly diagnosed cases in women. In particular, breast cancer accounts for approximately one-third of cases. Therefore, the differential expression of NUP155 between healthy breast cells (MCF-10 A cells) and three breast cancer cell lines (BT-549, MDA-MB-231, and T-47D cells) was examined using qRT-PCR analysis (Supplementary Fig. 8). The results of qRT-PCR analysis were consistent with those of bioinformatics analysis. The expression of NUP155 mRNA in breast cancer cell lines was significantly higher than that in healthy breast cells. Triple-negative breast cancer (TNBC) has the worst prognosis and poses significant treatment challenges among breast cancer subtypes, with a 5-year survival rate of only 11% in advanced stages [39]. Two TNBC cell lines (MDA-MB-231 and BT-549 cells) were used in subsequent in vitro experiments.
Effect of NUP155 on the proliferation, migration, and apoptosis of TNBC cells
To investigate the effect of NUP155 on TNBC, si-NUP155 was transfected into MDA-MB-231 and BT-549 cells. Transfection with si-NUP155 downregulated the mRNA and protein expression levels of NUP155 (Fig. 11A–F). Western blotting analysis revealed that the BCL2/BAX expression ratio was significantly downregulated in si-NUP155-transfected TNBC cells (Fig. 11J–M). The CCK-8 assay results revealed that transfection with si-NUP155 significantly decreased tumor cell proliferation (Fig. 11H–I). Furthermore, the wound healing and transwell assay results revealed that NUP155 knockdown significantly impaired the wound healing (Fig. 11G) and migratory (Fig. 11N) abilities of TNBC cells.
Discussion
The NPC, a giant protein complex embedded in the nuclear envelope, mediates selective nucleocytoplasmic transport [40]. Deficiency in NPC, which has a crucial role in gene expression and growth and development, is associated with the pathogenesis of various pathological conditions, such as viral infections, cancer, and neurodegenerative diseases. Thus, the nuclear transport machinery is a therapeutic target for several diseases [41]. Previous studies have reported that the NPC promotes tumorigenesis in hematological cancers and non-hematological malignancies, such as skin, lung, pancreatic, prostate, and colon cancers [42]. Among nuclear pore proteins, NUP155 is critical for assembling the structure of the NPC [43]. NUP155 is involved in mitotic arrest mediated by the novel anti-tumor drug NP-10 [44] and regulates mRNA translation for the cell cycle protein-dependent kinase inhibitor p21 [20]. Therapeutic approaches for cancer mainly target the proliferation of cancer cells, impairing the assembly of the mitotic spindle to arrest cancer cell division and death. This approach is considered to be the most effective therapeutic strategy. This is the reason why we focus on the gene NUP155. The role of NUP155 in different cancer types has not been systematically examined using bioinformatic approaches. This study aimed to comprehensively analyze the differential expression, prognostic value, and biological function of NUP155 in different cancer types. The correlation of NUP155 with TIME, TIICs, and immune-related genes was also investigated.
This study demonstrated that NUP155 was under-expressed in normal human tissues, except for bone marrow and testis. We hypothesized that NUP155 upregulation is related to enhanced cell proliferation and turnover in the bone marrow and testis. NUP155 is upregulated in most cancer types but is downregulated in LAML and TGCT. Bone marrow contains hematopoietic stem cells, while testis contains spermatogonial stem cells. Several studies have reported that NPC is important for maintaining stem cell homeostasis [45]. For example, the inhibition of NUP153 can lead to the derepression of developmental genes and the induction of early differentiation in stem cells [46, 47]. Therefore, we hypothesize that NUP155 upregulation in healthy bone marrow and testis is necessary to maintain stem cell homeostasis and that the suppression of NUP155 expression in LAML and TGCT leads to aberrant proliferation and differentiation of stem cells. The NPC plays a major role in cell fate determination. NUP98 mutations contributing to leukemia development have been extensively studied. Mutations in multiple nucleoporin-encoding genes can cause tissue-specific defects or lethality in animals [48,49,50]. Based on the data shown in Fig. 3B, we speculate that NUP155 may also influence leukemia through gene mutations. Although the expression level of NUP155 is downregulated in TGCT, the data in Fig. 3A revealed that the NUP155 promoter methylation level is downregulated in TGCT, indicating gene instability.
Cancer cells are characterized by an overall loss of methylation modifications and aberrant methylation sites within the enhancer and promoter regions [51, 52]. The NUP155 promoter methylation level is downregulated in COAD, PRAD, READ, and TGCT, which is consistent with the classical model [53]. However, the NUP155 promoter hypermethylation upregulates NUP155 expression in BRCA, CESC, ESCA, HNSC, KIRC, LIHC, LUAD, LUSC, PAAD, SARC, and UCEC tissues. A review by Jim Smith et al. in ‘Trends in Cancer’ suggested that promoter DNA hypermethylation promotes aberrant gene activation. The authors further discussed the potential molecular mechanisms underlying this aberrant regulation [54]. Therefore, the correlation between NUP155 expression and DNA methylation identified in this study warrants further investigation.
Somatic mutations that accumulate in normal tissues are associated with aging and disease. Additionally, somatic mutations enable the development of novel therapeutic approaches for cancer [55]. Similarly, tumor-specific antigens derived from somatic mutations have provided new approaches for developing cancer therapy [56]. Designing vaccines based on patient-specific mutations is a potential strategy for developing personalized tumor therapy [57]. In this study, NUP155 was frequently mutated in various tumors, especially melanoma, endometrial carcinoma, cervical adenocarcinoma, BLCA, and cervical squamous cell carcinoma. These findings demonstrated that NUP155 is a potential target for cancer vaccines, especially for melanoma, which was the most frequent tumor type. Cox regression analysis of TCGA dataset revealed that NUP155 upregulation is a risk factor for OS in 13 types of cancer. Additionally, NUP155 upregulation was a risk factor for DSS and PFS in nine types of tumors and a favorable factor for DSS and PFS in KIRC. These findings suggest that NUP155 can be used to stratify patients with cancer.
TMB is a valuable predictive biomarker for immunotherapy response in various cancer types [58]. Meanwhile, MSI is an important biomarker for ICI response [59]. The upregulation of MSI or TMB can lead to the generation of potent neoantigens, which elicit enhanced immune responses and contribute to an enhanced immunotherapeutic response [59, 60]. The findings of this study indicate a strong correlation between NUP155 expression and the levels of TMB and MSI in various cancer types. Hence, NUP155 expression can aid in predicting patient response to ICI therapy.
The results of this study suggest that NUP155 plays a crucial role in cancer immunity. The ESTIMATE score revealed a negative correlation between NUP155 expression and the levels of stromal and immune cells in the tumor microenvironment of 15 different cancer types. TIICs regulate tumorigenesis and tumor progression [61]. Under physiological conditions, the immune system can recognize and destroy tumor cells in the TIME. However, tumor cells can evade the immune system through various mechanisms that promote their survival and growth. Cytotoxic T cells expressing CD8 receptors on their surface play a pivotal role in the response to cancer immunotherapies. CD8 receptors are the most potent effectors in the anti-cancer immune response [62]. Treg cells contribute to resistance against ICI therapies, promoting cancer progression [63]. Th1 cytokines stimulate immune cells to eliminate tumor cells, while Th2 cytokines inhibit tumor immune responses [64, 65]. Analysis of immune cell infiltration using the xCell database revealed that NUP155 expression was negatively correlated with the infiltration levels of CD8 + cells and Th1 cells and positively correlated with the infiltration levels of Treg cells and Th2 cells. T cell exhaustion refers to the impaired state of CD8 + T cells, which can identify and eliminate tumor cells, leading to a diminished response against tumor cells [66, 67] Dysfunctional CD8 + Tex cells in the tumor microenvironment exhibit the expression of immune co-inhibitory receptors, including LAG3, CD160, CTLA4, and TIGIT [68, 69]. CD8 + Tex cells with enhanced expression of ICP receptors exhibit an exhausted phenotype [70]. As shown in Fig. 7B, NUP155 was positively correlated and co-expressed with these ICP receptors in most tumors. Hence, we hypothesized that NUP155 may upregulate ICP receptors, regulating the levels of CD8 + Tex cells and consequently modulating the TIME. Additionally, analysis of the TISCH dataset revealed that NUP155 was upregulated in T prolif cells and Treg cells. Analysis of the xCell dataset and the TISCH dataset revealed that NUP155 upregulation may modulate the tumor microenvironment status by upregulating the levels of Tregs and regulating the balance of Th1 and Th2 cells. GSEA revealed that NUP155 was significantly enriched in immune-related pathways, especially those involved in antigen processing and expression. Tumor cells can evade immune recognition by disrupting antigen processing and expression through the suppression of dendritic cell function and the downregulation of HLA-1 [71]. Immune cell infiltration analysis revealed that NUP155 expression was negatively correlated with the infiltration levels of dendritic cells. These findings suggested that NUP155 expression is a prognostic risk factor in most tumor types. ICIs exert potent growth-inhibitory effects against various cancers, improving the clinical outcomes of patients with cancer [72]. In this study, NUP155 expression was correlated with genes encoding MHC, immune suppressors, immune activators, chemokines, and chemokine receptors. In particular, NUP155 was negatively correlated with genes encoding ICPs. Thus, NUP155 may mediate the effects of immunotherapy in patients with cancer by regulating TIICs and ICPs.
In the PPI network of NUP155, the top five genes that were most strongly correlated with NUP155 were NUP133, GLE1, REG1B, SNX5, and TACC2. The structure of NUP133, a nucleoporin, is similar to that of NUP155 [73, 74]. NUP133 functions as a gene regulator and promotes the expression of the oncogene MYC [75]. The amino (N)-terminal region of GLE1 interacts with NUP155 [76]. GLE1, an RNA export protein, is crucial for multiple steps in gene expression, from mRNA export to translation [77]. Mutations in GLE1 can lead to developmental and neurodegenerative disorders and some cancers [78,79,80]. REG1B, SNX5, and TACC2 are reported to be oncogenes [81,82,83,84,85]. Additionally, the PPI network revealed that NUP155 was mainly related to functions, such as nuclear transport, nucleocytoplasmic transport, regulation of ATP metabolic process, and RNA transport as shown in Supplementary Table S8. Therefore, aberrant NUP155 expression may interfere with these functions and activate oncogenes, such as REG1B, SNX5, and TACC2 to exert carcinogenic effects.
NUP155 can also serve as a predictive biomarker of immunotherapeutic response in some cancers. ICI therapy is associated with survival benefits in patients with upregulated ICP expression. PD-1(PDCD1) and PD-L1(CD274) are the most widely recognized prognostic predictors of immunotherapy [86, 87]. KM survival analysis of the immunotherapy cohort revealed that the prognosis of patients with SKCM exhibiting NUP155 upregulation was poor, which may be related to the correlation between NUP155, ICP-encoding genes, and the degree of immune cell infiltration. In SKCM, PD-1 expression and dendritic cell levels were negatively correlated with NUP155 expression. Thus, the group exhibiting NUP155 upregulation may not benefit from PD-1 inhibitor therapy. In BLCA, the survival benefit of immunotherapy was significant in the group with NUP155 upregulation. PD-1/PD-L1 and dendritic cells were positively correlated with NUP155 expression in BLCA. Hence, we hypothesized that the correlation between NUP155 expression, ICP-encoding gene expression, and the degree of immune cell infiltration affects the response of patients with cancer to immunotherapy.
The establishment of the sensitivity of tumors with differential expression levels of NUP155 to anti-tumor drugs may guide tumor treatment. For example, trametinib, a representative MEK inhibitor, is used as a monotherapy for unresectable or metastatic melanoma with BRAF-V600E or V600K mutations [88, 89]. The sensitivity to trametinib is significantly and positively correlated with the expression of NUP155. Therefore, patients with drug-resistant melanoma exhibiting NUP155 upregulation may be suitable for treatment with trametinib. Paclitaxel and 5-fluorouracil (5-FU) are also common chemotherapy drugs [90, 91]. NUP155 is negatively correlated with the sensitivity to paclitaxel and positively correlated with the sensitivity to 5-FU. Therefore, tumors with NUP155 upregulation may be resistant to paclitaxel but not to 5-FU. Analysis of NUP155 expression can aid in selecting anti-tumor drugs in clinical practice, especially for drug-resistant tumors.
The role of NUP155 in BRCA was validated using molecular biology methods. qRT-PCR analysis revealed that the NUP155 mRNA level was upregulated in BRCA cells. TNBC, which accounts for 10–20% of all diagnosed breast cancers [92], is characterized by the absence of estrogen receptor, progesterone receptor, and human epidermal growth factor receptor 2 [93, 94]. Additionally, TNBC exhibits high recurrence, metastasis, and resistance to conventional treatments. Thus, the treatment of TNBC is challenging when compared with that of other types of breast cancer [95]. Clinically, TNBC is often classified as “difficult-to-treat breast cancer” and is a research hotspot in the field of breast cancer research [96, 97]. Therefore, this study selected TNBC cells for subsequent in vitro experiments to validate the findings of bioinformatics analysis. Cellular experiments revealed that NUP155 knockdown significantly inhibited the proliferation and migration and promoted apoptosis in TNBC cells. These findings confirm the accuracy and reliability of the pan-cancer bioinformatics analysis in BRCA. The specific pathogenic mechanism of NUP155 in breast cancer will be validated in the future.
This study has some limitations. Although NUP155 expression was demonstrated to be associated with the immune microenvironment and prognosis of human malignancies, the regulatory effect of NUP155 on the clinical survival rates mediated through the immune-related pathway is unclear. Additionally, this study performed preliminary experiments on BRCA but did not examine the molecular mechanisms of NUP155 in BRCA. This systematic pan-cancer analysis suggested that NUP155 was differentially expressed between non-cancerous and cancer tissues and that NUP155 dysregulation is associated with tumor staging and can be used to predict the prognosis. Additionally, DNA methylation, TMB, MSI, cancer stemness, TIME, and immune cell infiltration may be correlated with NUP155 dysregulation in cancer. These findings can aid in determining the role of NUP155 in tumor development and progression and facilitate the application of precise and personalized immunotherapies.
Availability of data and materials
Publicly available database analyzed in this study can be found in the TCGA (https://tcgadata.nci.nih.gov/tcga/) UCSC (https://xenabrowser.net/datapages/), CellMiner (https://discover.nci.nih.gov/cellminer/home.do) and GSEA (https://www.gsea-msigdb.org/gsea/downloads.jsp).
References
Sung H, Ferlay J, Siegel RL, Laversanne M, Soerjomataram I, Jemal A, Bray F. Global Cancer statistics 2020: GLOBOCAN estimates of incidence and Mortality Worldwide for 36 cancers in 185 countries. CA Cancer J Clin. 2021;71(3):209–49.
Xia C, Dong X, Li H, Cao M, Sun D, He S, Yang F, Yan X, Zhang S, Li N, et al. Cancer statistics in China and United States, 2022: profiles, trends, and determinants. Chin Med J (Engl). 2022;135(5):584–90.
Hargadon KM, Johnson CE, Williams CJ. Immune checkpoint blockade therapy for cancer: an overview of FDA-approved immune checkpoint inhibitors. Int Immunopharmacol. 2018;62:29–39.
Wieder T, Eigentler T, Brenner E, Röcken M. Immune checkpoint blockade therapy. J Allergy Clin Immunol. 2018;142(5):1403–14.
Davis L. The nuclear pore complex. Annu Rev Biochem. 1995;64:865–96.
Sakuma S, D’Angelo MA. The roles of the nuclear pore complex in cellular dysfunction, aging and disease. Semin Cell Dev Biol. 2017;68:72–84.
Hurt E, Beck M. Towards understanding nuclear pore complex architecture and dynamics in the age of integrative structural analysis. Curr Opin Cell Biol. 2015;34:31–8.
Simon DN, Rout MP. Cancer and the nuclear pore complex. Adv Exp Med Biol. 2014;773:285–307.
Jamali T, Jamali Y, Mehrbod M, Mofrad M. Nuclear pore complex: biochemistry and biophysics of nucleocytoplasmic transport in health and disease. Int Rev cell Mol Biology. 2011;287:233–86.
Sun J, Shi Y, Yildirim E. The nuclear pore complex in cell type-specific chromatin structure and gene regulation. Trends Genet. 2019;35(8):579–88.
Sakuma S, Raices M, Borlido J, Guglielmi V, Zhu E, D’Angelo M. Inhibition of nuclear pore complex formation selectively induces cancer cell death. Cancer Discov. 2021;11(1):176–93.
Jans D, Martin A, Wagstaff K. Inhibitors of nuclear transport. Curr Opin Cell Biol. 2019;58:50–60.
Taylor J, Sendino M, Gorelick A, Pastore A, Chang M, Penson A, Gavrila E, Stewart C, Melnik E, Herrejon Chavez F, et al. Altered nuclear export signal recognition as a driver of oncogenesis. Cancer Discov. 2019;9(10):1452–67.
Kosinski J, Mosalaganti S, von Appen A, Teimer R, DiGuilio A, Wan W, Bui K, Hagen W, Briggs J, Glavy J, et al. Molecular architecture of the inner ring scaffold of the human nuclear pore complex. Sci (New York NY). 2016;352(6283):363–5.
von Appen A, Kosinski J, Sparks L, Amanda DG, Vollmer B. In situ structural analysis of the human nuclear pore complex. Nature. 2015;526:140.
De Magistris P, Tatarek-Nossol M, Dewor M, Antonin W. A self-inhibitory interaction within Nup155 and membrane binding are required for nuclear pore complex formation. J Cell Sci. 2018;131(1):jcs208538.
Zhang X, Chen S, Yoo S, Chakrabarti S, Zhang T, Ke T, Oberti C, Yong S, Fang F, Li L, et al. Mutation in nuclear pore component NUP155 leads to atrial fibrillation and early sudden cardiac death. Cell. 2008;135(6):1017–27.
Savci-Heijink C, Halfwerk H, Koster J, van de Vijver M. A novel gene expression signature for bone metastasis in breast carcinomas. Breast Cancer Res Treat. 2016;156(2):249–59.
Engqvist H, Parris T, Kovács A, Rönnerman E, Sundfeldt K, Karlsson P, Helou K. Validation of Novel Prognostic biomarkers for early-stage Clear-Cell, endometrioid and mucinous ovarian carcinomas using immunohistochemistry. Front Oncol. 2020;10:162.
Holzer K, Ori A, Cooke A, Dauch D, Drucker E, Riemenschneider P, Andres-Pons A, DiGuilio A, Mackmull M, Baßler J, et al. Nucleoporin Nup155 is part of the p53 network in liver cancer. Nat Commun. 2019;10(1):2147.
Boyault S, Rickman D, de Reyniès A, Balabaud C, Rebouissou S, Jeannot E, Hérault A, Saric J, Belghiti J, Franco D, et al. Transcriptome classification of HCC is related to gene alterations and to new therapeutic targets. Hepatology (Baltimore, MD). 2007;45(1):42–52.
Basit A, Cho M, Kim E, Kwon D, Kang S, Lee J. The cGAS/STING/TBK1/IRF3 innate immunity pathway maintains chromosomal stability through regulation of p21 levels. Exp Mol Med. 2020;52(4):643–57.
Goldman MJ, Craft B, Hastie M, Repečka K, McDade F, Kamath A, Banerjee A, Luo Y, Rogers D, Brooks AN, et al. Visualizing and interpreting cancer genomics data via the Xena platform. Nat Biotechnol. 2020;38(6):675–8.
Chandrashekar DS, Karthikeyan SK, Korla PK, Patel H, Shovon AR, Athar M, Netto GJ, Qin ZS, Kumar S, Manne U, et al. UALCAN: an update to the integrated cancer data analysis platform. Neoplasia. 2022;25:18–27.
Sun D, Wang J, Han Y, Dong X, Ge J, Zheng R, Shi X, Wang B, Li Z, Ren P, et al. TISCH: a comprehensive web resource enabling interactive single-cell transcriptome visualization of tumor microenvironment. Nucleic Acids Res. 2021;49(D1):D1420-1430.
Laue C, Papazova E, Pannenbeckers A, Schrezenmeir J. Effect of a probiotic and a Synbiotic on Body Fat Mass, Body Weight and traits of metabolic syndrome in individuals with abdominal overweight: a human, Double-Blind, randomised, controlled clinical study. Nutrients. 2023;15(13):3039.
Wenthe J, Eriksson E, Hellström AC, Moreno R, Ullenhag G, Alemany R, Lövgren T, Loskog A. Immunostimulatory gene therapy targeting CD40, 4-1BB and IL-2R activates DCs and stimulates antigen-specific T-cell and NK-cell responses in melanoma models. J Transl Med. 2023;21(1):506.
El-Adili F, Lui JK, Najem M, Farina G, Trojanowska M, Sam F, Bujor AM. Periostin overexpression in scleroderma cardiac tissue and its utility as a marker for disease complications. Arthritis Res Ther. 2022;24(1):251.
Beroukhim R, Mermel CH, Porter D, Wei G, Raychaudhuri S, Donovan J, Barretina J, Boehm JS, Dobson J, Urashima M, et al. The landscape of somatic copy-number alteration across human cancers. Nature. 2010;463(7283):899–905.
Bonneville R, Krook MA, Kautto EA, Miya J, Wing MR, Chen HZ, Reeser JW, Yu L, Roychowdhury S. Landscape of microsatellite instability across 39 cancer types. JCO Precis Oncol. 2017;2017:PO.17.00073.
Sacks D, Baxter B, Campbell BCV, Carpenter JS, Cognard C, Dippel D, Eesa M, Fischer U, Hausegger K, Hirsch JA, et al. Multisociety consensus quality improvement revised consensus statement for endovascular therapy of acute ischemic stroke. Int J Stroke. 2018;13(6):612–32.
D’Andrea AD. DNA repair pathways and human cancer. In: The Molecular Basis of Cancer: Fourth Edition. Elsevier; 2015. p. 47-66, e42. https://doi.org/10.1016/B978-1-4557-4066-6.00004-4.
Gao J, Aksoy BA, Dogrusoz U, Dresdner G, Gross B, Sumer SO, Sun Y, Jacobsen A, Sinha R, Larsson E, et al. Integrative analysis of complex cancer genomics and clinical profiles using the cBioPortal. Sci Signal. 2013;6(269):pl1.
Cerami E, Gao J, Dogrusoz U, Gross BE, Sumer SO, Aksoy BA, Jacobsen A, Byrne CJ, Heuer ML, Larsson E, et al. The cBio cancer genomics portal: an open platform for exploring multidimensional cancer genomics data. Cancer Discov. 2012;2(5):401–4.
Liu C-J, Hu F-F, Xia M-X, Han L, Zhang Q, Guo A-Y. GSCALite: a web server for gene set cancer analysis. Bioinformatics. 2018;34(21):3771–2.
Warde-Farley D, Donaldson SL, Comes O, Zuberi K, Badrawi R, Chao P, Franz M, Grouios C, Kazi F, Lopes CT, et al. The GeneMANIA prediction server: biological network integration for gene prioritization and predicting gene function. Nucleic Acids Res. 2010;38(suppl2):W214-220.
Livak KJ, Schmittgen TD. Analysis of relative gene expression data using real-time quantitative PCR and the 2(-Delta Delta C(T)) method. Methods. 2001;25(4):402–8.
Steuer C, Ramalingam S. Tumor mutation burden: leading immunotherapy to the era of precision medicine? J Clin Oncol. 2018;36(7):631–2.
Ji P, Gong Y, Jin ML, Wu HL, Guo LW, Pei YC, Chai WJ, Jiang YZ, Liu Y, Ma XY, et al. In vivo multidimensional CRISPR screens identify Lgals2 as an immunotherapy target in triple-negative breast cancer. Sci Adv. 2022;8(26):eabl8247.
Pascual-Garcia P, Capelson M. The nuclear pore complex and the genome: organizing and regulatory principles. Curr Opin Genet Dev. 2021;67:142–50.
Kim S, Fernandez-Martinez J, Nudelman I, Shi Y, Zhang W, Raveh B, Herricks T, Slaughter B, Hogan J, Upla P, et al. Integrative structure and functional anatomy of a nuclear pore complex. Nature. 2018;555(7697):475–82.
Azmi AS, Mohammad RM. Targeting cancer at the nuclear pore. J Clin Oncol. 2016;34(34):4180–2.
Franz C, Askjaer P, Antonin W, Iglesias CL, Haselmann U, Schelder M, de Marco A, Wilm M, Antony C, Mattaj IW. Nup155 regulates nuclear envelope and nuclear pore complex formation in nematodes and vertebrates. Embo j. 2005;24(20):3519–31.
Yokoyama T, Yukuhiro M, Iwasaki Y, Tanaka C, Sankoda K, Fujiwara R, Shibuta A, Higashi T, Motoyama K, Arima H, et al. Identification of candidate molecular targets of the novel antineoplastic antimitotic NP-10. Sci Rep. 2019;9(1):16825.
Colussi C, Grassi C. Epigenetic regulation of neural stem cells: the emerging role of nucleoporins. Stem Cells. 2021;39(12):1601–14.
Jacinto FV, Benner C, Hetzer MW. The nucleoporin Nup153 regulates embryonic stem cell pluripotency through gene silencing. Genes Dev. 2015;29(12):1224–38.
Toda T, Hsu JY, Linker SB, Hu L, Schafer ST, Mertens J, Jacinto FV, Hetzer MW, Gage FH. Nup153 interacts with Sox2 to enable bimodal gene regulation and maintenance of neural progenitor cells. Cell Stem Cell. 2017;21(5):618-634e617.
Nakamura T. NUP98 fusion in human leukemia: dysregulation of the nuclear pore and homeodomain proteins. Int J Hematol. 2005;82(1):21–7.
Domingo-Reinés J, Montes R, Garcia-Moreno A, Gallardo A, Sanchez-Manas JM, Ellson I, Lamolda M, Calabro C, López-Escamez JA, Catalina P, et al. The pediatric leukemia oncoprotein NUP98-KDM5A induces genomic instability that may facilitate malignant transformation. Cell Death Dis. 2023;14(6):357.
Bertrums EJM, Smith JL, Harmon L, Ries RE, Wang YJ, Alonzo TA, Menssen AJ, Chisholm KM, Leonti AR, Tarlock K, et al. Comprehensive molecular and clinical characterization of NUP98 fusions in pediatric acute myeloid leukemia. Haematologica. 2023;108(8):2044–58.
Nishiyama A, Nakanishi M. Navigating the DNA methylation landscape of cancer. Trends Genet. 2021;37(11):1012–27.
Papanicolau-Sengos A, Aldape K. DNA methylation profiling: an emerging paradigm for Cancer diagnosis. Annu Rev Pathol. 2022;17:295–321.
Heichman KA, Warren JD. DNA methylation biomarkers and their utility for solid cancer diagnostics. Clin Chem Lab Med. 2012;50(10):1707–21.
Smith J, Sen S, Weeks RJ, Eccles MR, Chatterjee A. Promoter DNA hypermethylation and paradoxical gene activation. Trends Cancer. 2020;6(5):392–406.
Gold B. Somatic mutations in cancer: stochastic versus predictable. Mutat Res Genet Toxicol Environ Mutagen. 2017;814:37–46.
Sahin U, Türeci Ö. Personalized vaccines for cancer immunotherapy. Science. 2018;359(6382):1355–60.
Lang F, Schrörs B, Löwer M, Türeci Ö, Sahin U. Identification of neoantigens for individualized therapeutic cancer vaccines. Nat Rev Drug Discov. 2022;21(4):261–82.
Sha D, Jin Z, Budczies J, Kluck K, Stenzinger A, Sinicrope F. Tumor Mutational Burden as a predictive biomarker in solid tumors. Cancer Discov. 2020;10(12):1808–25.
Chang L, Chang M, Chang HM, Chang F. Microsatellite instability: a predictive biomarker for cancer immunotherapy. Appl Immunohistochem Mol Morphol. 2018;26(2):e15–21.
Goodman AM, Sokol ES, Frampton GM, Lippman SM, Kurzrock R. Microsatellite-stable tumors with high mutational burden benefit from immunotherapy. Cancer Immunol Res. 2019;7(10):1570–3.
Schreiber RD, Old LJ, Smyth MJ. Cancer immunoediting: integrating immunity’s roles in cancer suppression and promotion. Science. 2011;331(6024):1565–70.
Raskov H, Orhan A, Christensen JP, Gögenur I. Cytotoxic CD8(+) T cells in cancer and cancer immunotherapy. Br J Cancer. 2021;124(2):359–67.
Ohue Y, Nishikawa H. Regulatory T (Treg) cells in cancer: can Treg cells be a new therapeutic target? Cancer Sci. 2019;110(7):2080–9.
Nakayama T, Hirahara K, Onodera A, Endo Y, Hosokawa H, Shinoda K, Tumes DJ, Okamoto Y. Th2 cells in health and disease. Annu Rev Immunol. 2017;35:53–84.
Kidd P. Th1/Th2 balance: the hypothesis, its limitations, and implications for health and disease. Altern Med Rev. 2003;8(3):223–46.
McLane LM, Abdel-Hakeem MS, Wherry EJ. CD8 T cell exhaustion during chronic viral infection and Cancer. Annu Rev Immunol. 2019;37:457–95.
Huang Y, Jia A, Wang Y, Liu G. CD8(+) T cell exhaustion in anti-tumour immunity: the new insights for cancer immunotherapy. Immunology. 2023;168(1):30–48.
Dolina JS, Van Braeckel-Budimir N, Thomas GD, Salek-Ardakani S. CD8(+) T cell exhaustion in Cancer. Front Immunol. 2021;12:715234.
Tietscher S, Wagner J, Anzeneder T, Langwieder C, Rees M, Sobottka B, de Souza N, Bodenmiller B. A comprehensive single-cell map of T cell exhaustion-associated immune environments in human breast cancer. Nat Commun. 2023;14(1):98.
Belk JA, Daniel B, Satpathy AT. Epigenetic regulation of T cell exhaustion. Nat Immunol. 2022;23(6):848–60.
Wang Y, Xiang Y, Xin VW, Wang XW, Peng XC, Liu XQ, Wang D, Li N, Cheng JT, Lyv YN, et al. Dendritic cell biology and its role in tumor immunotherapy. J Hematol Oncol. 2020;13(1):107.
Bagchi S, Yuan R, Engleman EG. Immune Checkpoint inhibitors for the treatment of Cancer: clinical impact and mechanisms of response and resistance. Annu Rev Pathol. 2021;16:223–49.
Shen W, Gong B, Xing C, Zhang L, Sun J, Chen Y, Yang C, Yan L, Chen L, Yao L, et al. Comprehensive maturity of nuclear pore complexes regulates zygotic genome activation. Cell. 2022;185(26):4954-4970e4920.
Schwartz M, Travesa A, Martell SW, Forbes DJ. Analysis of the initiation of nuclear pore assembly by ectopically targeting nucleoporins to chromatin. Nucleus. 2015;6(1):40–54.
Scholz BA, Sumida N, de Lima CDM, Chachoua I, Martino M, Tzelepis I, Nikoshkov A, Zhao H, Mehmood R, Sifakis EG, et al. WNT signaling and AHCTF1 promote oncogenic MYC expression through super-enhancer-mediated gene gating. Nat Genet. 2019;51(12):1723–31.
Rayala HJ, Kendirgi F, Barry DM, Majerus PW, Wente SR. The mRNA export factor human Gle1 interacts with the nuclear pore complex protein Nup155. Mol Cell Proteom. 2004;3(2):145–55.
Lin DH, Correia AR, Cai SW, Huber FM, Jette CA, Hoelz A. Structural and functional analysis of mRNA export regulation by the nuclear pore complex. Nat Commun. 2018;9(1):2319.
Culjkovic-Kraljacic B, Baguet A, Volpon L, Amri A, Borden KL. The oncogene eIF4E reprograms the nuclear pore complex to promote mRNA export and oncogenic transformation. Cell Rep. 2012;2(2):207–15.
Fellenberg J, Sähr H, Kunz P, Zhao Z, Liu L, Tichy D, Herr I. Restoration of mir-127-3p and miR-376a-3p counteracts the neoplastic phenotype of giant cell tumor of bone derived stromal cells by targeting COA1, GLE1 and PDIA6. Cancer Lett. 2016;371(1):134–41.
Tzschach A, Grasshoff U, Schäferhoff K, Bonin M, Dufke A, Wolff M, Haas-Lude K, Bevot A, Riess O. Interstitial 9q34.11-q34.13 deletion in a patient with severe intellectual disability, hydrocephalus, and cleft lip/palate. Am J Med Genet A. 2012;158a(7):1709–12.
Liu Z, Zhang Y, Xie J, Li C, Wang X, Shen J, Zhang Y, Wang S, Cheng N. Regenerating gene 1B silencing inhibits colon cancer cell HCT116 proliferation and invasion. Int J Biol Markers. 2015;30(2):e217-225.
Zhou Q, Li J, Ge C, Chen J, Tian W, Tian H. SNX5 suppresses clear cell renal cell carcinoma progression by inducing CD44 internalization and epithelial-to-mesenchymal transition. Mol Ther Oncolytics. 2022;24:87–100.
Zhou Q, Huang T, Jiang Z, Ge C, Chen X, Zhang L, Zhao F, Zhu M, Chen T, Cui Y, et al. Upregulation of SNX5 predicts poor prognosis and promotes hepatocellular carcinoma progression by modulating the EGFR-ERK1/2 signaling pathway. Oncogene. 2020;39(10):2140–55.
Cheng S, Douglas-Jones A, Yang X, Mansel RE, Jiang WG. Transforming acidic coiled-coil-containing protein 2 (TACC2) in human breast cancer, expression pattern and clinical/prognostic relevance. Cancer Genomics Proteom. 2010;7(2):67–73.
Shakya M, Zhou A, Dai D, Zhong Q, Zhou Z, Zhang Y, Li X, Bholee AK, Chen M. High expression of TACC2 in hepatocellular carcinoma is associated with poor prognosis. Cancer Biomark. 2018;22(4):611–9.
Majidpoor J, Mortezaee K. The efficacy of PD-1/PD-L1 blockade in cold cancers and future perspectives. Clin Immunol. 2021;226: 108707.
Wang X, Wang F, Zhong M, Yarden Y, Fu L. The biomarkers of hyperprogressive disease in PD-1/PD-L1 blockage therapy. Mol Cancer. 2020;19(1):81.
Atkins MB, Lee SJ, Chmielowski B, Tarhini AA, Cohen GI, Truong TG, Moon HH, Davar D, O’Rourke M, Stephenson JJ, et al. Combination Dabrafenib and Trametinib versus combination Nivolumab and Ipilimumab for patients with advanced BRAF-mutant melanoma: the DREAMseq Trial-ECOG-ACRIN EA6134. J Clin Oncol. 2023;41(2):186–97.
Long GV, Hauschild A, Santinami M, Atkinson V, Mandalà M, Chiarion-Sileni V, Larkin J, Nyakas M, Dutriaux C, Haydon A, et al. Adjuvant dabrafenib plus Trametinib in stage III BRAF-mutated melanoma. N Engl J Med. 2017;377(19):1813–23.
Vodenkova S, Buchler T, Cervena K, Veskrnova V, Vodicka P, Vymetalkova V. 5-fluorouracil and other fluoropyrimidines in colorectal cancer: past, present and future. Pharmacol Ther. 2020;206: 107447.
Zhao S, Tang Y, Wang R, Najafi M. Mechanisms of cancer cell death induction by paclitaxel: an updated review. Apoptosis. 2022;27(9–10):647–67.
Gluz O, Liedtke C, Gottschalk N, Pusztai L, Nitz U, Harbeck N. Triple-negative breast cancer–current status and future directions. Ann Oncol. 2009;20(12):1913–27.
Vagia E, Mahalingam D, Cristofanilli M. The Landscape of targeted therapies in TNBC. Cancers (Basel). 2020;12(4):916.
Yin L, Duan JJ, Bian XW, Yu SC. Triple-negative breast cancer molecular subtyping and treatment progress. Breast Cancer Res. 2020;22(1):61.
Bai X, Ni J, Beretov J, Graham P, Li Y. Triple-negative breast cancer therapeutic resistance: where is the Achilles’ heel? Cancer Lett. 2021;497:100–11.
Tray N, Taff J, Adams S. Therapeutic landscape of metaplastic breast cancer. Cancer Treat Rev. 2019;79:101888.
So JY, Ohm J, Lipkowitz S, Yang L. Triple negative breast cancer (TNBC): non-genetic tumor heterogeneity and immune microenvironment: emerging treatment options. Pharmacol Ther. 2022;237: 108253.
Acknowledgements
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Funding
This study was supported by Key Laboratory of Clinical Laboratory Diagnostics (Ministry of Education) [Grant number: 2022E10022], Young Talent Program [grant number: qnyc108] and Zhejiang Medical Health Science and technology Program [Grant number: 2019RC204].
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ZQ W, ZP W, XX D and RX W designed the study. ZX W and DY X performed the data analysis. ZQ W and JX B wrote the manuscript and helped with the validation. HD W, HF L and YY X helped the revision. All authors contributed to the article and approved the submitted version.
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The research did not involve animal experiments or human specimens or any ethics-related issues. The study methodologies conformed to the standards set by the Declaration of Helsinki.
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The authors declare no competing interests.
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Supplementary Information
Additional file 1:
The original blots of western blotting.
Additional file 2:
Supplementary figure 1. The correlation between NUP155 expression and the pathological or clinical stages of cancers, including (A) ACC, (B) KICH, (C) KIRC, (D) KIRP, (E) LIHC, (F) OV, (G) SKCM, (H) UCS.
Additional file 3:
Supplementary figure 2. (A) Association between NUP155 CNV and mRNA in pan-cancer. (B) The top six with the highest correlation scores between NUP155 CNV and mRNA.
Additional file 4:
Supplementary figure 3. Association between NUP155 expression levels and Disease-free survival (DSS) in TCGA pan-cancer. (A) Forest plot of association of NUP155 expression and DSS. (B–J) Kaplan-Meier analysis of the association between NUP155 expression and DSS.
Additional file 5:
Supplementary figure 4. Association between NUP155 expression levels and Progression-free survival (PFS) in TCGA pan-cancer. (A) Forest plot of association of NUP155 expression and PFS. (B–K) Kaplan-Meier analysis of the association between NUP155 expression and PFS.
Additional file 6:
Supplementary figure 5. Eight tumors with the highest correlation coefficients between NUP155 expression and the tumor microenvironment. (A) Correlation between NUP155 and stromal scores in GBM, STES, TGCT, SKCM, SARC, KIPAN, STAD, KIRC. (B) Correlation between NUP155 and immune scores in GBM, STES, UCEC, THYM, ESCA, STAD, LUSC, SKCM.
Additional file 7:
Supplementary figure 6. Association between NUP155 gene and the TIME in pan-cancer tissues, using the TISCH database.
Additional file 8:
Supplementary figure 7. Reactome functional annotation of NUP155 in various cancers, including (A) CHOL, (B) PCPG, (C) KICH, (D) TGCT, (E) KIRC, (F) THCA, (G) PAAD, (H) THYM.
Additional file 9:
Supplementary figure 8. Relative mRNA expression of NUP155 in normal breast cell and breast cancer cell lines. *p < 0.05 and **p < 0.01.
Additional file 10:
Supplementary table S1. The R-Scripts and online tools in this study. Supplementary table S2. The detail results of the methylation levels of NUP155 in pan-cancer. Supplementary table S3. The landscape of NUP155 copy number variation (CNV) in different cancer types. Supplementary table S4. The correlation between NUP155 expression levels and drug sensitivity in the CTRP database. Supplementary table S5. The correlation between NUP155 expression levels and drug sensitivity in the GDSC database. Supplementary table S6. The enrichment analysis of NUP155 in the REACTOME pathway. Supplementary table S7. Genes interacting with NUP155 in the PPI network. Supplementary table S8. Functional enrichment of genes interacting with NUP155 in the PPI network.
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Wang, Zq., Wu, Zx., Wang, Zp. et al. Pan-cancer analysis of NUP155 and validation of its role in breast cancer cell proliferation, migration, and apoptosis. BMC Cancer 24, 353 (2024). https://doi.org/10.1186/s12885-024-12039-6
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DOI: https://doi.org/10.1186/s12885-024-12039-6