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Tan Y, Zhou J, Liu K, Liu R, Zhou J, Wu Z, Li L, Zeng J, Feng X, Dong B, Du J. Novel prognostic biomarkers in nasopharyngeal carcinoma unveiled by mega-data bioinformatics analysis. Front Oncol 2024; 14:1354940. [PMID: 38854728 PMCID: PMC11157084 DOI: 10.3389/fonc.2024.1354940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Accepted: 05/09/2024] [Indexed: 06/11/2024] Open
Abstract
Nasopharyngeal carcinoma (NPC) is commonly diagnosed at an advanced stage with a high incidence rate in Southeast Asia and Southeast China. However, the limited availability of NPC patient survival data in public databases has resulted in less rigorous studies examining the prediction of NPC survival through construction of Kaplan-Meier curves. These studies have primarily relied on small samples of NPC patients with progression-free survival (PFS) information or data from head and neck squamous cell carcinoma (HNSCC) studies almost without NPC patients. Thus, we coanalyzed RNA expression profiles in eleven datasets (46 normal (control) vs 160 tumor (NPC)) downloaded from the Gene Expression Omnibus (GEO) database and survival data provided by Jun Ma from Sun Yat-sen University. Then, differential analysis, gene ontology (GO) enrichment, Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis and network analysis were performed using STRING database. After that, 2142 upregulated differentially expressed genes (DEGs) and 3857 downregulated DEGs were screened. Twenty-five of them were identified as hub genes, which were enriched in several pathways (cilium movement, extracellular matrix structural constituent, homologous recombination and cell cycle). Utilizing the comprehensive dataset we amassed from GEO database, we conducted a survival analysis of DEGs and subsequently constructed survival models. Seven DEGs (RASGRP2, MOCOS, TTC9, ARHGAP4, DPM3, CD37, and CD72) were identified and closely related to the survival prognosis of NPC. Finally, qRT-PCR, WB and IHC were performed to confirm the elevated expression of RASGRP2 and the decreased expression of TTC9, CD37, DPM3 and ARHGAP4, consistent with the DEG analysis. Conclusively, our findings provide insights into the novel prognostic biomarkers of NPC by mega-data bioinformatics analysis, which suggests that they may serve special targets in the treatment of NPC.
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Affiliation(s)
- Yishuai Tan
- Department of Otolaryngology-Head & Neck Surgery, West China Hospital, Sichuan University, Chengdu, China
- West China School of Pharmacy, Sichuan University, Chengdu, China
| | - Jiao Zhou
- Department of Geriatrics, West China Hospital, Sichuan University, Chengdu, China
| | - Kai Liu
- College of Biomedical Engineering, Sichuan University, Chengdu, China
| | - Ruowu Liu
- Department of Otolaryngology-Head & Neck Surgery, West China Hospital, Sichuan University, Chengdu, China
| | - Jing Zhou
- Department of Otolaryngology-Head & Neck Surgery, West China Hospital, Sichuan University, Chengdu, China
| | - Zhenru Wu
- Institute of Clinical Pathology, Key Laboratory of Transplant Engineering and Immunology, NHC, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Linke Li
- Department of Otolaryngology-Head & Neck Surgery, West China Hospital, Sichuan University, Chengdu, China
| | - Jiaqi Zeng
- Department of Otolaryngology-Head & Neck Surgery, West China Hospital, Sichuan University, Chengdu, China
| | - Xuxian Feng
- Department of Otolaryngology-Head & Neck Surgery, West China Hospital, Sichuan University, Chengdu, China
| | - Biao Dong
- State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, China
| | - Jintao Du
- Department of Otolaryngology-Head & Neck Surgery, West China Hospital, Sichuan University, Chengdu, China
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Díaz Del Arco C, Fernández Aceñero MJ, Ortega Medina L. Molecular Classifications in Gastric Cancer: A Call for Interdisciplinary Collaboration. Int J Mol Sci 2024; 25:2649. [PMID: 38473896 DOI: 10.3390/ijms25052649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Revised: 02/21/2024] [Accepted: 02/22/2024] [Indexed: 03/14/2024] Open
Abstract
Gastric cancer (GC) is a heterogeneous disease, often diagnosed at advanced stages, with a 5-year survival rate of approximately 20%. Despite notable technological advancements in cancer research over the past decades, their impact on GC management and outcomes has been limited. Numerous molecular alterations have been identified in GC, leading to various molecular classifications, such as those developed by The Cancer Genome Atlas (TCGA) and the Asian Cancer Research Group (ACRG). Other authors have proposed alternative perspectives, including immune, proteomic, or epigenetic-based classifications. However, molecular stratification has not yet transitioned into clinical practice for GC, and little attention has been paid to alternative molecular classifications. In this review, we explore diverse molecular classifications in GC from a practical point of view, emphasizing their relationships with clinicopathological factors, prognosis, and therapeutic approaches. We have focused on classifications beyond those of TCGA and the ACRG, which have been less extensively reviewed previously. Additionally, we discuss the challenges that must be overcome to ensure their impact on patient treatment and prognosis. This review aims to serve as a practical framework to understand the molecular landscape of GC, facilitate the development of consensus molecular categories, and guide the design of innovative molecular studies in the field.
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Affiliation(s)
- Cristina Díaz Del Arco
- Department of Legal Medicine, Psychiatry and Pathology, School of Medicine, Complutense University of Madrid, 28040 Madrid, Spain
- Department of Pathology, Hospital Clínico San Carlos, Health Research Institute of the Hospital Clínico San Carlos (IdISSC), 28040 Madrid, Spain
| | - María Jesús Fernández Aceñero
- Department of Legal Medicine, Psychiatry and Pathology, School of Medicine, Complutense University of Madrid, 28040 Madrid, Spain
- Department of Pathology, Hospital Clínico San Carlos, Health Research Institute of the Hospital Clínico San Carlos (IdISSC), 28040 Madrid, Spain
| | - Luis Ortega Medina
- Department of Legal Medicine, Psychiatry and Pathology, School of Medicine, Complutense University of Madrid, 28040 Madrid, Spain
- Department of Pathology, Hospital Clínico San Carlos, Health Research Institute of the Hospital Clínico San Carlos (IdISSC), 28040 Madrid, Spain
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Hephzibah Cathryn R, Udhaya Kumar S, Younes S, Zayed H, George Priya Doss C. A review of bioinformatics tools and web servers in different microarray platforms used in cancer research. ADVANCES IN PROTEIN CHEMISTRY AND STRUCTURAL BIOLOGY 2022; 131:85-164. [PMID: 35871897 DOI: 10.1016/bs.apcsb.2022.05.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Over the past decade, conventional lab work strategies have gradually shifted from being limited to a laboratory setting towards a bioinformatics era to help manage and process the vast amounts of data generated by omics technologies. The present work outlines the latest contributions of bioinformatics in analyzing microarray data and their application to cancer. We dissect different microarray platforms and their use in gene expression in cancer models. We highlight how computational advances empowered the microarray technology in gene expression analysis. The study on protein-protein interaction databases classified into primary, derived, meta-database, and prediction databases describes the strategies to curate and predict novel interaction networks in silico. In addition, we summarize the areas of bioinformatics where neural graph networks are currently being used, such as protein functions, protein interaction prediction, and in silico drug discovery and development. We also discuss the role of deep learning as a potential tool in the prognosis, diagnosis, and treatment of cancer. Integrating these resources efficiently, practically, and ethically is likely to be the most challenging task for the healthcare industry over the next decade; however, we believe that it is achievable in the long term.
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Affiliation(s)
- R Hephzibah Cathryn
- Laboratory of Integrative Genomics, Department of Integrative Biology, School of Biosciences and Technology, Vellore Institute of Technology, Vellore, India
| | - S Udhaya Kumar
- Laboratory of Integrative Genomics, Department of Integrative Biology, School of Biosciences and Technology, Vellore Institute of Technology, Vellore, India
| | - Salma Younes
- Department of Biomedical Sciences, College of Health and Sciences, Qatar University, QU Health, Doha, Qatar
| | - Hatem Zayed
- Department of Biomedical Sciences, College of Health and Sciences, Qatar University, QU Health, Doha, Qatar
| | - C George Priya Doss
- Laboratory of Integrative Genomics, Department of Integrative Biology, School of Biosciences and Technology, Vellore Institute of Technology, Vellore, India.
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Identification of Key Genes in Gastric Cancer by Bioinformatics Analysis. BIOMED RESEARCH INTERNATIONAL 2020; 2020:7658230. [PMID: 33015179 PMCID: PMC7525308 DOI: 10.1155/2020/7658230] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Revised: 08/12/2020] [Accepted: 09/01/2020] [Indexed: 12/22/2022]
Abstract
Gastric cancer (GC) is one of the most common malignancies of the digestive system with few genetic markers for its early detection and prevention. In this study, differentially expressed genes (DEGs) were analyzed using GEO2R from GSE54129 and GSE13911 of the Gene Expression Omnibus (GEO). Then, gene enrichment analysis, protein-protein interaction (PPI) network construction, and topological analysis were performed on the DEGs by the Gene Ontology (GO), Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway, STRING, and Cytoscape. Finally, we performed survival analysis of key genes through the Kaplan-Meier plotter. A total of 1034 DEGs were identified in GC. GO and KEGG results showed that DEGs mainly enriched in plasma membrane, cell adhesion, and PI3K-Akt signaling pathway. Subsequently, the PPI network with 44 nodes and 333 edges was constructed, and 18 candidate genes in the network were focused on by centrality analysis and module analysis. Furthermore, data showed that high expressions of fibronectin 1(FN1), the tissue inhibitor of metalloproteinases 1 (TIMP1), secreted phosphoprotein 1 (SPP1), apolipoprotein E (APOE), and versican (VCAN) were related to poor overall survivals in GC patients. In summary, this study suggests that FN1, TIMP1, SPP1, APOE, and VCAN may act as the key genes in GC.
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Wu X, Ouyang Y, Wang B, Lin J, Bai Y. Hypermethylation of the IRAK3-Activated MAPK Signaling Pathway to Promote the Development of Glioma. Cancer Manag Res 2020; 12:7043-7059. [PMID: 32848462 PMCID: PMC7425661 DOI: 10.2147/cmar.s252772] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Accepted: 06/25/2020] [Indexed: 12/21/2022] Open
Abstract
Objective This study aimed to elucidate the molecular mechanism underlying the involvement of abnormal DNA methylation in the development of glioma and identify potential new targets for glioma therapy. Methods The GSE79122 chip achieved from the Gene Expression Omnibus (GEO) database containing 69 glioma samples and 9 normal samples was analyzed. Methylation-specific polymerase chain reaction (MS-PCR or MSP), reverse transcription-PCR, and Western blot analysis were used to confirm the methylation level and expression level of the interleukin receptor-associated kinase (IRAK3) gene in glioma cells, 36 glioma samples, and the corresponding normal samples. In vitro, the proliferation, apoptosis rate, migration, and invasion abilities of glioma cells were detected by Cell Counting Kit-8 assay, Transwell assay, enzyme-linked immunosorbent assay, and flow cytometry, respectively. Besides, the xenograft assay of nude mice was used to confirm the effect of the IRAK3 on glioma in vivo. Results Microarray analysis showed that the IRAK3 was one of the most hypermethylated genes in glioma, and the related mitogen-activated protein kinase (MAPK) signaling pathway was activated. More experiments supported the higher methylation level and lower expression level of the IRAK3 in glioma tissues and cell lines. The viability, migration, and invasion ability of glioma cells significantly reduced and the apoptosis rate increased with the overexpression and demethylation of the IRAK3 in vitro. Besides, treatment with the MAPK signaling pathway inhibitor PD325901 alone or the overexpression or demethylation of the IRAK3 had a similar effect as the overexpression or demethylation of the IRAK3 alone in glioma cells. In vivo, xenotransplantation experiments in nude mice confirmed that the overexpression and demethylation of the IRAK3 and suppression of the MAPK signaling pathway inhibited the development of glioma. Conclusion IRAK3 inhibited the development of glioma progression through the MAPK signaling pathway.
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Affiliation(s)
- Xinghai Wu
- Department of Neurosurgery, Zhangye People's Hospital Affiliated to Hexi University, Gansu, People's Republic of China
| | - Yian Ouyang
- Department of Neurosurgery, First Affiliated Hospital of Gannan Medical College, Jiangxi, People's Republic of China
| | - Bin Wang
- Department of Neurosurgery, Zhangye People's Hospital Affiliated to Hexi University, Gansu, People's Republic of China
| | - Jian Lin
- Department of Neurosurgery, Zhangye People's Hospital Affiliated to Hexi University, Gansu, People's Republic of China
| | - Yun Bai
- Department of Neurosurgery, Zhangye People's Hospital Affiliated to Hexi University, Gansu, People's Republic of China
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LEPR hypomethylation is significantly associated with gastric cancer in males. Exp Mol Pathol 2020; 116:104493. [PMID: 32659237 DOI: 10.1016/j.yexmp.2020.104493] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2019] [Revised: 05/28/2020] [Accepted: 07/07/2020] [Indexed: 02/06/2023]
Abstract
BACKGROUND Previous study has shown LEPR is a candidate gene of prediction and treatment of gastric cancer (GC). The purpose of this study was to test whether LEPR methylation could predict the risk of GC. MATERIALS AND METHODS Tumor tissues and 5-cm adjacent non-tumor tissues from 117 newly diagnosed and untreated GC patients were collected for the current methylation study. LEPR methylation levels were determined by quantitative methylation specific PCR (qMSP), and the methylation level of LEPR was described by the percentage of methylated reference (PMR). RESULTS Our results showed that LEPR methylation levels were significantly lower in tumor tissues than those in adjacent non-tumor tissues (median PMR: 36.64% vs. 50.29%, P = 1E-4). In addition, LEPR methylation levels were found to be significantly associated with platelet (r = -0.198, P = .037). Further subgroup analysis showed that the association of LEPR promoter hypomethylation with GC was specific to males (males: P = 7E-5; females: P = .500). Notably, significant hypomethylation of LEPR promoter was found only in GC patients without recurrence (P = .002) but not in GC patients with recurrence (P = .146). The AUC of LEPR hypomethylation for identification of GC risk was 0.649 with a sensitivity of 67.5% and a specificity of 63.2%. In addition, the AUC of LEPR hypomethylation in males was 0.685 with a sensitivity of 68.4% and a specificity of 69.6%. CONCLUSION LEPR hypomethylation can be used to predict the risk of GC in males. And it might also have the potential to predict the recurrence in GC patients.
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Morales-Guerrero SE, Rivas-Ortiz CI, Ponce de León-Rosales S, Gamboa-Domínguez A, Rangel-Escareño C, Uscanga-Domínguez LF, Aguilar-Gutiérrez GR, Kershenobich-Stalnikowitz D, Castillo-Rojas G, López-Vidal Y. Translation of gastric disease progression at gene level expression. J Cancer 2020; 11:520-532. [PMID: 31897247 PMCID: PMC6930440 DOI: 10.7150/jca.29038] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Accepted: 08/31/2019] [Indexed: 12/15/2022] Open
Abstract
Helicobacter pylori is associated with the development of several lesions in the human stomach. This chronic infection produces gastritis, which can progress to intestinal metaplasia and gastric cancer. To date, there is very little information regarding gene-expression in the different phases of progression caused by chronic H. pylori infection. In this study, we performed a genome-wide gene-expression analysis in gastric biopsies of patients chronically infected with H. pylori, using the potential of high-throughput technologies that have not been fully exploited in this area. Here we illustrate the potential correlation of H. pylori infection with the gene expression changes in follicular gastritis, chronic gastritis and intestinal metaplasia. We also suggest its potential as biomarkers of each condition. An exploratory set of 21 biopsies from patients with follicular gastritis, chronic gastritis, and intestinal metaplasia were analyzed by gene-expression microarrays in order to identify the biological processes altered in each lesion. The microarray data was corroborated by real-time PCR, while 79 Formalin-Fixed Paraffin-Embeded samples were analyzed by immunohistochemistry. Follicular gastritis exhibited significant enrichment in genes associated with glutamate signaling, while chronic gastritis showed a down-regulation in metallothionein 1 and 2 and in oxidative phosphorylation-related genes, which could be associated with the chronic infecton of H. pylori. Intestinal metaplasia exhibited an over-expression of gastrointestinal stem cell markers, such as LGR5 and PROM1, as well as messenger RNA and nucleic acid metabolism-related genes. The gene-expression patterns found in this study provide new comparative information about chronic gastritis, follicular gastritis and intestinal metaplasia that may play an important role in the development of gastric cancer.
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Affiliation(s)
- Stephanie Euridice Morales-Guerrero
- Programa de Inmunología Molecular Microbiana, Departamento de Microbiología y Parasitología, Facultad de Medicina, Universidad Nacional Autónoma de México (UNAM), Ciudad de México, México
| | - Claudia Ivette Rivas-Ortiz
- Programa de Inmunología Molecular Microbiana, Departamento de Microbiología y Parasitología, Facultad de Medicina, Universidad Nacional Autónoma de México (UNAM), Ciudad de México, México
| | - Sergio Ponce de León-Rosales
- Dirección de Enseñanza, Departamentos de Gastroenterología, Patología y Dirección General. Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán (INCMNSZ), Ciudad de México, México
| | - Armando Gamboa-Domínguez
- Dirección de Enseñanza, Departamentos de Gastroenterología, Patología y Dirección General. Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán (INCMNSZ), Ciudad de México, México
| | - Claudia Rangel-Escareño
- Departamento de Genómica Computacional, Instituto Nacional de Medicina Genómica (INMEGEN), Ciudad de México, México
| | - Luis Federico Uscanga-Domínguez
- Dirección de Enseñanza, Departamentos de Gastroenterología, Patología y Dirección General. Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán (INCMNSZ), Ciudad de México, México
| | - Germán Rubén Aguilar-Gutiérrez
- Centro de Investigación Sobre Enfermedades Infecciosas (CISEI), Instituto Nacional de Salud Pública (INSP), Cuernavaca, Morelos, México
| | - David Kershenobich-Stalnikowitz
- Dirección de Enseñanza, Departamentos de Gastroenterología, Patología y Dirección General. Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán (INCMNSZ), Ciudad de México, México
| | - Gonzalo Castillo-Rojas
- Programa de Inmunología Molecular Microbiana, Departamento de Microbiología y Parasitología, Facultad de Medicina, Universidad Nacional Autónoma de México (UNAM), Ciudad de México, México
| | - Yolanda López-Vidal
- Programa de Inmunología Molecular Microbiana, Departamento de Microbiología y Parasitología, Facultad de Medicina, Universidad Nacional Autónoma de México (UNAM), Ciudad de México, México
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Li Y, Guo XB, Wang JS, Wang HC, Li LP. Function of fibroblast growth factor 2 in gastric cancer occurrence and prognosis. Mol Med Rep 2019; 21:575-582. [PMID: 31789423 PMCID: PMC6947937 DOI: 10.3892/mmr.2019.10850] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Accepted: 09/18/2019] [Indexed: 12/14/2022] Open
Abstract
The present study aimed to explore the role of fibroblast growth factor 2 (FGF2) in the development and prognosis of gastric cancer (GC). The relationship between FGF2 mRNA expression levels and the clinical characteristics of GC was investigated using microarray data from four GC cohorts involving 726 patients obtained from the Gene Expression Omnibus. The results of the present study indicated that FGF2 expression levels were an independent factor affecting the prognosis of GC. The primary functions of FGF2 were related to cell adhesion and angiogenesis, and patients with high levels of FGF2 expression had poorer TNM staging and prognosis; these differences were statistically significant. In terms of immune infiltration, a higher extent of M2 macrophage intrusion was observed in patients with higher levels of FGF2. However, the degree of infiltration by dendritic and CD4+ T cells was lower, and this difference was statistically significant. Multivariate Cox proportional hazards model analysis revealed that age, TNM staging and FGF2 expression levels were independent prognostic factors for GC. In summary, FGF2 expression was demonstrated to be an independent prognostic factor in GC, and higher levels of FGF2 may promote the progression of this malignancy.
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Affiliation(s)
- Yang Li
- Gastrointestinal Department of Shandong Provincial Hospital, Shandong University, Jinan, Shandong 250000, P.R. China
| | - Xiao-Bo Guo
- Gastrointestinal Department of Shandong Provincial Hospital, Shandong University, Jinan, Shandong 250000, P.R. China
| | - Jin Shen Wang
- Gastrointestinal Department of Shandong Provincial Hospital, Shandong University, Jinan, Shandong 250000, P.R. China
| | - Hong-Chang Wang
- Gastrointestinal Department of Shandong Provincial Hospital, Shandong University, Jinan, Shandong 250000, P.R. China
| | - Le-Ping Li
- Gastrointestinal Department of Shandong Provincial Hospital, Shandong University, Jinan, Shandong 250000, P.R. China
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Zhang QN, Zhu HL, Xia MT, Liao J, Huang XT, Xiao JW, Yuan C. A panel of collagen genes are associated with prognosis of patients with gastric cancer and regulated by microRNA-29c-3p: an integrated bioinformatics analysis and experimental validation. Cancer Manag Res 2019; 11:4757-4772. [PMID: 31213898 PMCID: PMC6538884 DOI: 10.2147/cmar.s198331] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2018] [Accepted: 05/05/2019] [Indexed: 12/12/2022] Open
Abstract
Background: The systematic expression characteristics and functions of collagen genes in gastric cancer (GC) have not been reported. Through public data integration, combined with bioinformatics analysis, we identified a panel of collagen genes overexpressed in GC. The functions of these genes were analyzed and validated in a GC-related cohort. microRNAs that may potentially target such genes were investigated in vitro. Methods: Four GC-related datasets retrieved from the Gene Expression Omnibus (GEO) were used to extract differentially expressed genes (DEGs) in GC. Functional annotation was performed to identify the potential roles of the identified DEGs. The association of candidate genes involved in the prognosis of GC patients (n=876) was determined using data provided by the Kaplan-Meier-plotter database, The Cancer Genome Atlas Stomach Adenocarcinoma (TCGA-STAD) repository, and a GC-related dataset (GSE15459). The expression characteristics of candidate genes and their associations with clinical parameters were validated in our in-house cohort (n=58). MicroRNAs able to target the identified candidate genes were predicted and confirmed using qRT-PCR, Western blotting, and dual-luciferase reporter assays in vitro. Results: After the integration of four GEO datasets, 76 DEGs were identified. Gene Ontology and Kyoto Encyclopedia of Genes and Genomes pathway analysis indicated that these DEGs were significantly enriched in ECM-related functions and pathways. A group of collagen genes was significantly upregulated in the GC tissues and constituted a protein-protein interaction network as important nodes. Some of these collagen genes were closely associated with poor prognosis in GC patients. Overexpression of COL1A1 and COL4A1 was confirmed in our in-house cohort, and this was related to prognosis and certain clinicopathological parameters. We found that microRNA-29c-3p could directly target COL1A1 and COL4A1 in BGC-823 cells. Conclusions: Collagen genes identified in this study were associated with patient prognosis in GC and may represent diagnostic markers or potential therapeutic targets. Aberrant expression of such candidate genes may be induced by microRNA-29c-3p.
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Affiliation(s)
- Qiang-Nu Zhang
- Department of Gastroenterology, West China School of Public Health and West China Fourth Hospital, Sichuan University, Chengdu 610041, People's Republic of China
| | - Hui-Li Zhu
- Department of Gastroenterology, West China School of Public Health and West China Fourth Hospital, Sichuan University, Chengdu 610041, People's Republic of China
| | - Meng-Ting Xia
- Department of Gastroenterology, the Affiliated Hospital of North Sichuan Medical College, Nanchong 637000, Sichuan, People's Republic of China
| | - Juan Liao
- Department of Gastroenterology, West China School of Public Health and West China Fourth Hospital, Sichuan University, Chengdu 610041, People's Republic of China
| | - Xiao-Tao Huang
- Department of Gastroenterology, the Affiliated Hospital of North Sichuan Medical College, Nanchong 637000, Sichuan, People's Republic of China
| | - Jiang-Wei Xiao
- Department of Gastrointestinal Surgery, the Affiliated Hospital of North Sichuan Medical College, Nanchong 637000, People's Republic of China
| | - Cong Yuan
- Department of Gastroenterology, the Affiliated Hospital of North Sichuan Medical College, Nanchong 637000, Sichuan, People's Republic of China
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Xu H, Peng L, Shen M, Xia Y, Li Z, He N. Shiga-like toxin I exerts specific and potent anti-tumour efficacy against gastric cancer cell proliferation when driven by tumour-preferential Frizzled-7 promoter. Cell Prolif 2019; 52:e12607. [PMID: 30955216 DOI: 10.1111/cpr.12607] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Revised: 02/22/2019] [Accepted: 02/22/2019] [Indexed: 02/03/2023] Open
Abstract
OBJECTIVES Tumour-targeted gene therapy is a promising approach for effective control of gastric cancer cell proliferation. Our study aims to develop a cancer therapy which combines tumour-targeting promoters with cytotoxins. METHODS The expression of globotriaosylceramide (Gb3), which is a Shiga-like toxin I (Stx1) receptor, was verified in gastric cancer compared with normal stomach tissues as assessed by flow cytometry and immunohistochemical analysis. We therefore constructed the recombinant pFZD7-Stx1 plasmid vectors with tumour-preferential Frizzled-7 promoter and Stx1. pFZD7-Stx1 was used to treat gastric cancer in vitro and in vivo. The gastric cancer cell proliferation and tumour growth were identified after the transfection with the pFZD7-Stx1. RESULTS Globotriaosylceramide was obviously increased in gastric cancer compared with normal stomach. The gastric cancer cell proliferation and tumour growth decreased significantly after the transfection with the pFZD7-Stx1. CONCLUSION Frizzled-7 promoter is preferentially active, and Gb3 is abundant in gastric cancer cells. Frizzled-7 promoter and Stx1 may be used to determine a novel and relatively specific and potent gastric cancer therapeutic strategy.
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Affiliation(s)
- Hongpan Xu
- Department of Clinical Laboratory, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
| | - Lijun Peng
- Department of Clinical Laboratory, Drum Tower Clinical College of Nanjing Medical University, Nanjing, China
| | - Mengjiao Shen
- Department of Clinical Laboratory, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
| | - Yanyan Xia
- Department of Clinical Laboratory, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
| | - Zhiyang Li
- Department of Clinical Laboratory, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
| | - Nongyue He
- State Key Laboratory of Bioelectronics, Southeast University, Nanjing, China
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Zang YQ, Feng YY, Luo YH, Zhai YQ, Ju XY, Feng YC, Wang JR, Yu CQ, Jin CH. Glycitein induces reactive oxygen species-dependent apoptosis and G0/G1 cell cycle arrest through the MAPK/STAT3/NF-κB pathway in human gastric cancer cells. Drug Dev Res 2019; 80:573-584. [PMID: 30916421 DOI: 10.1002/ddr.21534] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 02/26/2019] [Accepted: 03/18/2019] [Indexed: 02/06/2023]
Abstract
Glycitein is an isoflavone that reportedly inhibits the proliferation of human breast cancer and prostate cancer cells. However, its anti-cancer molecular mechanisms in human gastric cancer remain to be defined. This study evaluated the antitumor effects of glycitein on human gastric cancer cells and investigated the underlying mechanisms. We used MTT assay, flow cytometry and western blotting to investigate its molecular mechanisms with focus on reactive oxygen species (ROS) production. Our results showed that glycitein had significant cytotoxic effects on human gastric cancer cells. Glycitein markedly decreased mitochondrial transmembrane potential (ΔΨm) and increased AGS cells mitochondrial-related apoptosis, and caused G0/G1 cell cycle arrest by regulating cycle-related protein. Mechanistically, accompanying ROS, glycitein can activate mitogen-activated protein kinase (MAPK) and inhibited the signal transducer and activator of transcription 3 (STAT3) and nuclear factor-kappaB (NF-κB) signaling pathways. Furthermore, the MAPK signaling pathway regulated the expression levels of STAT3 and NF-κB upon treatment with MAPK inhibitor and N-acetyl-L-cysteine (NAC). These findings suggested that glycitein induced AGS cell apoptosis and G0/G1 phase cell cycle arrest via ROS-related MAPK/STAT3/NF-κB signaling pathways. Thus, glycitein has the potential to a novel targeted therapeutic agent for human gastric cancer.
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Affiliation(s)
- Yan-Qing Zang
- Department of Food Science and Engineering, College of Food Science, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang, China
| | - Yan-Yu Feng
- Department of Food Science and Engineering, College of Food Science, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang, China
| | - Ying-Hua Luo
- Department of Grass Science, College of Animal Science & Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang, China
| | - Yu-Qing Zhai
- Department of Food Science and Engineering, College of Food Science, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang, China
| | - Xue-Ying Ju
- Department of Food Science and Engineering, College of Food Science, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang, China
| | - Yu-Chao Feng
- Department of Food Science and Engineering, College of Food Science, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang, China
| | - Jia-Ru Wang
- Department of Biochemistry and Molecular Biology, College of Life Science & Technology, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang, China
| | - Chang-Qing Yu
- Department of Food Science and Engineering, College of Food Science, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang, China
| | - Cheng-Hao Jin
- Department of Food Science and Engineering, College of Food Science, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang, China.,Department of Biochemistry and Molecular Biology, College of Life Science & Technology, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang, China
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12
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Binato R, Santos EC, Boroni M, Demachki S, Assumpção P, Abdelhay E. A common molecular signature of intestinal-type gastric carcinoma indicates processes related to gastric carcinogenesis. Oncotarget 2018; 9:7359-7371. [PMID: 29484116 PMCID: PMC5800908 DOI: 10.18632/oncotarget.23670] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Accepted: 12/11/2017] [Indexed: 12/11/2022] Open
Abstract
Gastric carcinoma (GC) is one of the most aggressive cancers and the second leading cause of cancer death in the world. According to the Lauren classification, this adenocarcinoma is divided into two subtypes, intestinal and diffuse, which differ in their clinical, epidemiological and molecular features. Several studies have attempted to delineate the molecular signature of gastric cancer to develop new and non-invasive screening tests that improve diagnosis and lead to new treatment strategies. However, a consensus signature has not yet been identified for each condition. Thus, this work aimed to analyze the gene expression profile of Brazilian intestinal-type GC tissues using microarrays and compare the results to those of non-tumor tissue samples. Moreover, we compared our intestinal-type gastric carcinoma profile with those obtained from populations worldwide to assess their similarity. The results identified a molecular signature for intestinal-type GC and revealed that 38 genes differentially expressed in Brazilian intestinal-type gastric carcinoma samples can successfully distinguish gastric tumors from non-tumor tissue in the global population. These differentially expressed genes participate in biological processes important to cell homeostasis. Furthermore, Kaplan-Meier analysis suggested that 7 of these genes could individually be able to predict overall survival in intestinal-type gastric cancer patients.
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Affiliation(s)
- Renata Binato
- Laboratório de Célula tronco, Centro de Transplante de Medula Óssea (CEMO), Instituto Nacional de Câncer (INCA), Rio de Janeiro, RJ, Brazil
- Instituto Nacional de Ciência e Tecnologia Para o Controle do Câncer (INCT), Rio de Janeiro, RJ, Brazil
| | - Everton Cruz Santos
- Laboratório de Célula tronco, Centro de Transplante de Medula Óssea (CEMO), Instituto Nacional de Câncer (INCA), Rio de Janeiro, RJ, Brazil
- Instituto Nacional de Ciência e Tecnologia Para o Controle do Câncer (INCT), Rio de Janeiro, RJ, Brazil
| | - Mariana Boroni
- Laboratório de Bioinformática e Biologia Computacional, Instituto Nacional de Câncer (INCA), Rio de Janeiro, RJ, Brazil
| | - Samia Demachki
- Núcleo de Pesquisas em Oncologia, Universidade Federal do Pará (UFPA), Belém, PA, Brazil
| | - Paulo Assumpção
- Núcleo de Pesquisas em Oncologia, Universidade Federal do Pará (UFPA), Belém, PA, Brazil
| | - Eliana Abdelhay
- Laboratório de Célula tronco, Centro de Transplante de Medula Óssea (CEMO), Instituto Nacional de Câncer (INCA), Rio de Janeiro, RJ, Brazil
- Instituto Nacional de Ciência e Tecnologia Para o Controle do Câncer (INCT), Rio de Janeiro, RJ, Brazil
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13
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Jin Y, He J, Du J, Zhang RX, Yao HB, Shao QS. Overexpression of HS6ST2 is associated with poor prognosis in patients with gastric cancer. Oncol Lett 2017; 14:6191-6197. [PMID: 29113266 DOI: 10.3892/ol.2017.6944] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Accepted: 06/15/2017] [Indexed: 12/22/2022] Open
Abstract
The purpose of the present study was to investigate the clinical significance of the expression of heparan sulfate 6-O-sulfotransferase 2 (HS6ST2) in gastric cancer (GC). The Affymetrix GeneChip® Human Genome U133 Plus 2.0 Array (Affymetrix; Thermo Fisher Scientific, Inc., Waltham, MA, USA) was used to identify differentially expressed genes in GC tissues vs. adjacent non-tumor gastric tissues. Candidate genes were further verified by reverse transcription quantitative polymerase chain reaction (RT-qPCR) and immunohistochemistry (IHC). In addition, an independent dataset was obtained from the Gene Expression Omnibus, and a survival analysis was performed. Microarray analysis demonstrated that HS6ST2 was upregulated (>12-fold) in GC tissues compared with that in adjacent non-tumor tissues. RT-qPCR and IHC analysis of HS6ST2 in GC tissues and adjacent non-tumor tissues confirmed the microarray data. Furthermore, a positive association was demonstrated between HS6ST2 overexpression with the depth of tumor invasion, distant metastasis, and tumor-node metastasis stage. Survival analysis revealed an association between patients with increased expression of HS6ST2 and a poor prognosis of gastric cancer. Cox regression analysis indicated that the expression of HS6ST2 was an independent negative prognostic factor for GC. The expression of HS6ST2 in GC was significantly associated with specific clinicopathological parameters and prognosis of disease, thus we propose that HS6ST2 may represent a novel biomarker for GC.
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Affiliation(s)
- Yi Jin
- Department of General Surgery, Children's Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310052, P.R. China
| | - Jun He
- Department of Gastroenterology and Pancreatic Surgery, Zhejiang Provincial People's Hospital, Hangzhou, Zhejiang 310014, P.R. China
| | - Jing Du
- Department of Gastroenterology, Zhejiang Provincial People's Hospital, Hangzhou, Zhejiang 310014, P.R. China
| | - Ru-Xuan Zhang
- Zhejiang Academy of Medical Sciences, Hangzhou, Zhejiang 310013, P.R. China
| | - Hai-Bo Yao
- Department of Gastroenterology and Pancreatic Surgery, Zhejiang Provincial People's Hospital, Hangzhou, Zhejiang 310014, P.R. China
| | - Qin-Shu Shao
- Department of Gastroenterology and Pancreatic Surgery, Zhejiang Provincial People's Hospital, Hangzhou, Zhejiang 310014, P.R. China
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14
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Differential gene expression in the condylar cartilage of growing rabbits with temporomandibular joint anterior disk displacement—A transcriptomic study. Arch Oral Biol 2017; 74:92-100. [DOI: 10.1016/j.archoralbio.2016.11.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2015] [Revised: 09/22/2016] [Accepted: 11/04/2016] [Indexed: 12/14/2022]
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15
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Cha K, Li Y, Yi GS. Discovering gene expression signatures responding to tyrosine kinase inhibitor treatment in chronic myeloid leukemia. BMC Med Genomics 2016; 9 Suppl 1:29. [PMID: 27534394 PMCID: PMC4989900 DOI: 10.1186/s12920-016-0194-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Tyrosine kinase inhibitor (TKI)-based therapy is a recommended treatment for patients with chronic myeloid leukemia (CML). However, a considerable group of CML patients do not respond well to the TKI therapy. Challenging to overcome this problem, we tried to discover molecular signatures in gene expression profiles to discriminate the responders and non-responders of TKI therapy. METHODS We collected three microarray datasets of CML patients having total 73 responders and 38 non-responders. Statistical analysis was performed to identify differentially expressed genes (DEGs) as gene signature candidates from integrated microarray datasets. The classification performance of these genes and further selected discriminator gene sets was tested by using random forest and iterative backward variable selection methods. RESULTS We identified a set of genes including CTBP2, NADK, AZU1, CTSH, FSTL1, and HDLBP showing the highest accuracy more than 69.44 % to classify TKI response in CML patients. Interestingly, four genes of them are on the signaling pathway of cell proliferation. This set of genes showed much higher performance than the average performance of other genes in downstream signaling of TKI target, BCR-ABL. CONCLUSIONS In this study, we could find a set of potential companion diagnostic markers for TKI treatment and, at the same time, the potential of gene expression analysis to enhance the coverage of companion diagnostics.
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Affiliation(s)
- Kihoon Cha
- Department of Bio and Brain Engineering, KAIST, Daejeon, 34141, South Korea
| | - Yi Li
- Department of Bio and Brain Engineering, KAIST, Daejeon, 34141, South Korea
| | - Gwan-Su Yi
- Department of Bio and Brain Engineering, KAIST, Daejeon, 34141, South Korea.
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16
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Liu QR, Li YF, Deng ZQ, Cao JQ. Prognostic Significance of Dickkopf-1 in Gastric Cancer Survival: A Meta-Analysis. Genet Test Mol Biomarkers 2016; 20:170-5. [PMID: 27023747 DOI: 10.1089/gtmb.2015.0154] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
AIMS The prognostic role of dickkopf-1 (DKK1) in gastric cancer (GC) remains poorly characterized. We performed a meta-analysis to evaluate correlations between DKK1 overexpression and the prognosis of patients with GC. MATERIALS AND METHODS We included five published studies to assess the relationship between DKK1 and the clinicopathological characteristics and overall survival of GC patients. Literature searches, article selection, data collection, and statistical analysis were performed using RevMan 5.3 software. RESULTS Our analyses revealed that DKK1 overexpression was significantly associated with vascular invasion (odds ratio [OR] = 2.43, 95% confidence interval [CI] = [1.21, 4.89], p = 0.01, random effect), lymphatic invasion (OR = 2.61, 95% CI = [1.30, 5.24], p = 0.007, random effect), and distant metastasis (OR = 2.99, 95% CI = [1.95, 4.59], p < 0.00001, fixed effect). Moreover, we also found that DKK1 overexpression was significantly associated with poor overall survival in GC patients (risk ratio = 2.67, 95% CI = [2.24, 3.48], p < 0.00001, fixed effect). CONCLUSION This meta-analysis demonstrated that DKK1 may be a useful prognostic marker for GC.
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Affiliation(s)
- Qiong-Rong Liu
- Department of Gastrointestinal Surgery, The Second Affiliated Hospital of Nanchang University , Nanchang, China
| | - Yuan-Feng Li
- Department of Gastrointestinal Surgery, The Second Affiliated Hospital of Nanchang University , Nanchang, China
| | - Zi-Qing Deng
- Department of Gastrointestinal Surgery, The Second Affiliated Hospital of Nanchang University , Nanchang, China
| | - Jia-Qing Cao
- Department of Gastrointestinal Surgery, The Second Affiliated Hospital of Nanchang University , Nanchang, China
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17
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Wang S, Xu G, Deng L, Gu Z. Transcriptomic study on the impact of temporomandibular joint internal derangement in the condylar cartilage of rabbits. GENOMICS DATA 2015; 5:364-5. [PMID: 26484287 PMCID: PMC4583689 DOI: 10.1016/j.gdata.2015.06.034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 05/06/2015] [Revised: 06/26/2015] [Accepted: 06/29/2015] [Indexed: 11/30/2022]
Abstract
Internal derangement (ID) in the temporomandibular joint (TMJ) compromises a group of clinical problems, and holds a relative high prevalence in populations. However, the temporal genomic change in gene expression of condylar cartilage during continuous ID remains unclear. Here we reported the differentially expressed gene pattern in condylar cartilage of rabbits with ID from 1 to 8 weeks by microarray analysis. The whole genome project was deposited at GenBank under the accession PRJNA278127. The microarray analysis showed that 6478 genes have more than two-fold changes among all the tested transcripts. Many inflammation gene increased rapidly in the early stage while decrease later. On the contrary, the bone construction related genes showed a low level at first and increased at later period in the ID progression. Besides, the current study found some genes such as HLA2G, which had never been reported, might be relevant with ID.
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Affiliation(s)
- Shuhua Wang
- School of Stomatology, Zhejiang Chinese Medical University, Hangzhou, China
| | - Gaoli Xu
- Department of Oral and Maxillofacial Surgery, School of Stomatology, Zhejiang Chinese Medical University, Hangzhou, China
| | - Liquan Deng
- Key Laboratory of Stomatology, School of Stomatology, Zhejiang Chinese Medical University, Hangzhou, China
| | - Zhiyuan Gu
- School of Stomatology, Zhejiang Chinese Medical University, Hangzhou, China
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18
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Zhou XL, Wu JH, Wang XJ, Guo FJ. Integrated microRNA-mRNA analysis revealing the potential roles of microRNAs in tongue squamous cell cancer. Mol Med Rep 2015; 12:885-94. [PMID: 25760063 PMCID: PMC4438953 DOI: 10.3892/mmr.2015.3467] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2014] [Accepted: 02/02/2015] [Indexed: 01/21/2023] Open
Abstract
Tongue squamous cell carcinoma (TSCC) is a rare and aggressive type of cancer, which is associated with a poor prognosis. Identification of patients at high risk of TSCC tumorigenesis may provide information for the early detection of metastases, and for potential treatment strategies. MicroRNA (miRNA; miR) and mRNA expression profiling of TSCC tissue samples and normal control tissue samples were obtained from three Gene Expression Omnibus (GEO) data series. Bioinformatics analyses, including the Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes were used to identify genes and pathways specifically associated with miRNA-associated TSCC oncology. A total of 25 miRNAs and 769 mRNAs were differentially expressed in the two groups assessed, and all the differentially expressed miRNA and mRNA target interactions were analyzed. The miRNA target genes were predominantly associated with 38 GO terms and 13 pathways. Of the genes differentially expressed between the two groups, and confirmed in another GEO series, miRNA-494, miRNA-96, miRNA-183, runt-related transcription factor 1, programmed cell death protein 4 and membrane-associated guanylate kinase were the most significantly altered, and may be central in the regulation of TSCC. Bioinformatics may be used to analyze large quantities of data in microarrays through rigorous experimental planning, statistical analysis and the collection of complete data on TSCC. In the present study, a novel differential miRNA-mRNA expression network was constructed, and further investigation may provide novel targets for the diagnosis of TSCC.
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Affiliation(s)
- Xiao-Li Zhou
- Department of Stomatology, The First Affiliated Hospital of Henan University of Science and Technology, Luoyang, Henan 471003, P.R. China
| | - Jun-Hua Wu
- Department of Prosthodontics, School of Stomatology, Tongji University, Shanghai 200072, P.R. China
| | - Xin-Juan Wang
- Department of Stomatology, The First Affiliated Hospital of Henan University of Science and Technology, Luoyang, Henan 471003, P.R. China
| | - Fu-Jun Guo
- Department of Stomatology, The First Affiliated Hospital of Henan University of Science and Technology, Luoyang, Henan 471003, P.R. China
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19
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Let-7b inhibits cell proliferation, migration, and invasion through targeting Cthrc1 in gastric cancer. Tumour Biol 2014; 36:3221-9. [PMID: 25510669 DOI: 10.1007/s13277-014-2950-5] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Accepted: 12/04/2014] [Indexed: 02/06/2023] Open
Abstract
Dysregulation of specific microRNAs (miRNAs) is found to play a vital role in carcinogenesis and progression of gastric cancer (GC). In the present study, we investigated the expression profiles of miRNAs in gastric cancer. Let-7b was found downregulated remarkably in gastric cancer tissues and was correlated with Helicobacter pylori infection, tumor stage, and lymphatic metastasis. Ectopic expression of let-7b suppressed the growth, migration, invasion, and tumorigenicity of GC cells, whereas let-7b knockdown promoted these phenotypes. Bioinformatic analysis predicted collagen triple helix repeat containing 1 (Cthrc1) as a direct target of let-7b. Luciferase assay showed that let-7b repressed the activity of Cthrc1 through binding its 3'UTR. Western blotting also confirmed that the protein levels of Cthrc1 were decreased by let-7b. Cthrc1 was significantly upregulated and reversely correlated with let-7b levels in GC. Co-expression of let-7b and Cthrc1 without its 3'UTR could rescue cell growth, migration, and invasion inhibited by let-7b. These results suggest that let-7b may directly target Cthrc1 and function as a tumor suppressor gene in GC.
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20
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Wang H, Wang L, Wu Z, Sun R, Jin H, Ma J, Liu L, Ling R, Yi J, Wang L, Bian J, Chen J, Li N, Yuan S, Yun J. Three dysregulated microRNAs in serum as novel biomarkers for gastric cancer screening. Med Oncol 2014; 31:298. [PMID: 25367852 DOI: 10.1007/s12032-014-0298-8] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2014] [Accepted: 10/20/2014] [Indexed: 12/17/2022]
Abstract
Gastric cancer (GC) is one of the most threatening diseases. The symptoms of GC are complex and hard to detect, which also contribute to the poor prognosis of GC. Besides, the current diagnosis for GC is expensive and invasive. Thus, a fast, noninvasive biomarker is urgently needed for GC screening. MicroRNAs (miRNAs) are small noncoding RNAs, which are involved in a great variety of pathological processes, particularly carcinogenesis. MiRNAs are stable in gastric juice, plasma as well as serum, which facilitate it to be a promising biomarker for cancer. In this study, we selected three novel miRNAs, i.e., miR-233, miR-16, and miR-100, to investigate their potential diagnostic value in GC screening. A total of 50 GC patients and 47 healthy controls were involved in this study. Blood serum samples were collected; RNAs were extracted and normalized with U6 snRNA as the internal control; qRT-PCR was performed for relative expression of target miRNAs. Levels of miRNAs expression were compared by Student's t test for the comparison between two groups, and one-way ANOVA was used for multiple comparisons. The expression of miR-223, miR-16, and miR-100 was all significantly higher in GC patients than controls (all P < 0.001). All the tested miRNAs were manifested to be valuable biomarkers for GC. Relative expression of these miRNAs was significantly correlated with clinical characteristics of GC patients, such as TNM stage (P = 0.036 for miR-223; P < 0.001 for miR-100), metastatic status (P = 0.045 for miR-223; P = 0.031 for miR-16; P = 0.006 for miR-100), tumor size (P = 0.042 for miR-223; P = 0.031 for miR-16; P < 0.001 for miR-100), and differentiation grade (P = 0.036 for miR-223; P = 0.030 for miR-16; P = 0.034 for miR-100). However, in T classification, which considered both tumor size and direct extent of primary tumor, the difference in target miRNAs expression was not significant. In summary, we confirmed the diagnostic value of serum miR-223, miR-16, and miR-100 in GC. Significantly elevated expression of the three miRNAs was also observed in advanced GC patients, which suggested their availability in cancer staging.
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Affiliation(s)
- Hui Wang
- Department of Vascular and Endocrine Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an, 710032, Shanxi Province, China
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Zhang Y, Li Y, Li Y, Li R, Ma Y, Wang H, Wang Y. Chloroquine inhibits MGC803 gastric cancer cell migration via the Toll-like receptor 9/nuclear factor kappa B signaling pathway. Mol Med Rep 2014; 11:1366-71. [PMID: 25369757 DOI: 10.3892/mmr.2014.2839] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2014] [Accepted: 09/29/2014] [Indexed: 11/06/2022] Open
Abstract
Stimulation of Toll‑like receptor 9 (TLR9) has been associated with invasion in various types of cancer cell in vitro. The present study aimed to evaluate the expression of TLR9 in MGC803 gastric cancer cells and investigate the effect of a non‑specific TLR9 inhibitor, chloroquine (CQ), on MGC803 cell migration via the TLR9/nuclear factor kappa B (NFκB) signaling pathway. The expression of TLR9 was investigated using reverse transcription polymerase chain reaction (RT‑PCR), flow cytometry and western blot analysis. The effects of CQ on MGC803 cell proliferation were measured by MTT colorimetric assay. The mRNA expression levels of cyclooxygenase‑2 (COX‑2), matrix metalloproteinase (MMP)‑2, MMP‑7 and NFκB p65 were evaluated by RT‑PCR in MGC803 cells stimulated by various concentrations of CQ. The migration of gastric cancer cells treated with CQ at 12, 24 and 36 h was measured by wound healing assay. The results indicated that MGC803 cells expressed TLR9 and that CQ had anti‑proliferative effects on MGC803 cells and inhibited mRNA expression of COX‑2, MMP‑2, MMP‑7 and NFκB p65 (P<0.05). Furthermore, CQ inhibited the bioactivity of NFκB p65 and prevented the migration of MGC803 cells in a dose‑dependent manner (P<0.05). In conclusion, the results indicated that the TLR9/NFκB signaling pathway was involved in gastric cancer cell migration and that CQ had anti‑tumor activity.
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Affiliation(s)
- Yanli Zhang
- Department of Microbiology, College of Basic Medicine, Ningixia Medical University, Yinchuan, Ningxia 750004, P.R. China
| | - Yunhong Li
- Ningxia Key Laboratory of Cerebrocranial Diseases, Ningxia Medical University, Yinchuan, Ningxia 750004, P.R. China
| | - Yalan Li
- Department of Microbiology, College of Basic Medicine, Ningixia Medical University, Yinchuan, Ningxia 750004, P.R. China
| | - Rui Li
- Department of Microbiology, College of Basic Medicine, Ningixia Medical University, Yinchuan, Ningxia 750004, P.R. China
| | - Yajun Ma
- Department of Microbiology, College of Basic Medicine, Ningixia Medical University, Yinchuan, Ningxia 750004, P.R. China
| | - Hao Wang
- Department of Microbiology, College of Basic Medicine, Ningixia Medical University, Yinchuan, Ningxia 750004, P.R. China
| | - Yin Wang
- Ningxia Key Laboratory of Cerebrocranial Diseases, Ningxia Medical University, Yinchuan, Ningxia 750004, P.R. China
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