1
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Weidle UH, Birzele F, Brinkmann U, Auslaender S. Gastric Cancer: Identification of microRNAs Inhibiting Druggable Targets and Mediating Efficacy in Preclinical In Vivo Models. Cancer Genomics Proteomics 2021; 18:497-514. [PMID: 34183383 DOI: 10.21873/cgp.20275] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 04/30/2021] [Accepted: 05/05/2021] [Indexed: 01/06/2023] Open
Abstract
In addition to chemotherapy, targeted therapies have been approved for treatment of locally advanced and metastatic gastric cancer. The therapeutic benefit is significant but more durable responses and improvement of survival should be achieved. Therefore, the identification of new targets and new approaches for clinical treatment are of paramount importance. In this review, we searched the literature for down-regulated microRNAs which interfere with druggable targets and exhibit efficacy in preclinical in vivo efficacy models. As druggable targets, we selected transmembrane receptors, secreted factors and enzymes. We identified 38 microRNAs corresponding to the criteria as outlined. A total of 13 miRs target transmembrane receptors, nine inhibit secreted proteins and 16 attenuate enzymes. These microRNAs are targets for reconstitution therapy of gastric cancer. Further target validation experiments are mandatory for all of the identified microRNAs.
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Affiliation(s)
- Ulrich H Weidle
- Large Molecule Research, Roche Pharma Research and Early Development (pRED), Roche Innovation Center Munich, Penzberg, Germany;
| | - Fabian Birzele
- Pharmaceutical Sciences, Roche Pharma Research and Early Development (pRed), Roche Innovation Center Basel, Basel, Switzerland
| | - Ulrich Brinkmann
- Large Molecule Research, Roche Pharma Research and Early Development (pRED), Roche Innovation Center Munich, Penzberg, Germany;
| | - Simon Auslaender
- Large Molecule Research, Roche Pharma Research and Early Development (pRED), Roche Innovation Center Munich, Penzberg, Germany
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2
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Kato T, Nakamori M, Matsumura S, Nakamura M, Ojima T, Fukuhara H, Ino Y, Todo T, Yamaue H. Oncolytic virotherapy with human telomerase reverse transcriptase promoter regulation enhances cytotoxic effects against gastric cancer. Oncol Lett 2021; 21:490. [PMID: 33968206 PMCID: PMC8100961 DOI: 10.3892/ol.2021.12751] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Accepted: 03/18/2021] [Indexed: 12/19/2022] Open
Abstract
Currently, gastric cancer is the third most common cause of cancer-associated mortality worldwide. Oncolytic virotherapy using herpes simplex virus (HSV) has emerged as a novel therapeutic strategy against cancer. Telomerase is activated in >90of malignant tumors, including gastric cancer, and human telomerase reverse transcriptase (hTERT) is one of the major components of telomerase enzyme. Therefore, in oncolytic HSV, placing the essential genes under the regulation of the hTERT promoter may enhance its antitumor efficacy. The present study examined the antitumor effect of fourth-generation oncolytic HSVs, which contain the ICP6 gene under the regulation of the hTERT promoter (T-hTERT). To examine the association between hTERT expression and prognosis in patients with gastric cancer, immunohistochemical analysis of resected tumor specimens was performed. The enhanced efficacy of T-hTERT was determined in human gastric cancer cell lines in vitro and in human gastric adenocarcinoma specimens in vivo. In in vitro experiments, enhanced cytotoxicity of T-hTERT was observed in MKN1, MKN28 and MKN45 cells compared with that of a third-generation oncolytic HSV, T-null. In particular, the cytotoxicity of T-hTERT was markedly enhanced in MKN45 cells. Furthermore, in vivo experiments demonstrated that 36.7 and 54.9% of cells were found to be lysed 48 h after infection with T-null or T-hTERT viruses at 0.01 pfu/cell, respectively. The T-hTERT-treated group exhibited considerably lower cell viability than the control [phosphate-buffered saline (-)] group. Therefore, employing oncolytic HSVs that contain the ICP6 gene under the regulation of the hTERT promoter may be an effective therapeutic strategy for gastric cancer. To the best of our knowledge, the present study was the first to describe the effect of an oncolytic HSV with ICP6 expression regulated by the hTERT promoter on gastric cancer cells.
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Affiliation(s)
- Tomoya Kato
- Second Department of Surgery, Wakayama Medical University, School of Medicine, Wakayama 641-8510, Japan
| | - Mikihito Nakamori
- Second Department of Surgery, Wakayama Medical University, School of Medicine, Wakayama 641-8510, Japan
| | - Shuichi Matsumura
- Second Department of Surgery, Wakayama Medical University, School of Medicine, Wakayama 641-8510, Japan
| | - Masaki Nakamura
- Second Department of Surgery, Wakayama Medical University, School of Medicine, Wakayama 641-8510, Japan
| | - Toshiyasu Ojima
- Second Department of Surgery, Wakayama Medical University, School of Medicine, Wakayama 641-8510, Japan
| | - Hiroshi Fukuhara
- Department of Urology, Kyorin University, School of Medicine, Mitaka, Tokyo 181-8611, Japan
| | - Yasushi Ino
- Division of Innovative Cancer Therapy, The Advanced Clinical Research Center, The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan
| | - Tomoki Todo
- Division of Innovative Cancer Therapy, The Advanced Clinical Research Center, The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan
| | - Hiroki Yamaue
- Second Department of Surgery, Wakayama Medical University, School of Medicine, Wakayama 641-8510, Japan
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3
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Martínez-Barriocanal Á, Arango D, Dopeso H. PVT1 Long Non-coding RNA in Gastrointestinal Cancer. Front Oncol 2020; 10:38. [PMID: 32083000 PMCID: PMC7005105 DOI: 10.3389/fonc.2020.00038] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Accepted: 01/09/2020] [Indexed: 12/24/2022] Open
Abstract
Whole genome and transcriptome sequencing technologies have led to the identification of many long non-coding RNAs (lncRNAs) and stimulated the research of their role in health and disease. LncRNAs participate in the regulation of critical signaling pathways including cell growth, motility, apoptosis, and differentiation; and their expression has been found dysregulated in human tumors. Thus, lncRNAs have emerged as new players in the initiation, maintenance and progression of tumorigenesis. PVT1 (plasmacytoma variant translocation 1) lncRNA is located on chromosomal 8q24.21, a large locus frequently amplified in human cancers and predictive of increased cancer risk in genome-wide association studies (GWAS). Combined, colorectal and gastric adenocarcinomas are the most frequent tumor malignancies and also the leading cause of cancer-related deaths worldwide. PVT1 expression is elevated in gastrointestinal tumors and correlates with poor patient prognosis. In this review, we discuss the mechanisms of action underlying PVT1 oncogenic role in colorectal and gastric cancer such as MYC upregulation, miRNA production, competitive endogenous RNA (ceRNA) function, protein stabilization, and epigenetic regulation. We also illustrate the potential role of PVT1 as prognostic biomarker and its relationship with resistance to current chemotherapeutic treatments.
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Affiliation(s)
- Águeda Martínez-Barriocanal
- Group of Biomedical Research in Digestive Tract Tumors, CIBBIM-Nanomedicine, Vall d'Hebron University Hospital, Research Institute (VHIR), Universitat Autònoma de Barcelona, Barcelona, Spain.,Group of Molecular Oncology, IRB Lleida, Lleida, Spain
| | - Diego Arango
- Group of Biomedical Research in Digestive Tract Tumors, CIBBIM-Nanomedicine, Vall d'Hebron University Hospital, Research Institute (VHIR), Universitat Autònoma de Barcelona, Barcelona, Spain.,Group of Molecular Oncology, IRB Lleida, Lleida, Spain
| | - Higinio Dopeso
- Group of Biomedical Research in Digestive Tract Tumors, CIBBIM-Nanomedicine, Vall d'Hebron University Hospital, Research Institute (VHIR), Universitat Autònoma de Barcelona, Barcelona, Spain
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4
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Zhang B, Ling T, Zhaxi P, Cao Y, Qian L, Zhao D, Kang W, Zhang W, Wang L, Xu G, Zou X. Proton pump inhibitor pantoprazole inhibits gastric cancer metastasis via suppression of telomerase reverse transcriptase gene expression. Cancer Lett 2019; 452:23-30. [DOI: 10.1016/j.canlet.2019.03.029] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Revised: 03/07/2019] [Accepted: 03/20/2019] [Indexed: 02/07/2023]
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5
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Pliquet E, Ruffie C, Escande M, Thalmensi J, Najburg V, Combredet C, Bestetti T, Julithe M, Liard C, Huet T, Wain-Hobson S, Tangy F, Langlade-Demoyen P. Strong antigen-specific T-cell immunity induced by a recombinant human TERT measles virus vaccine and amplified by a DNA/viral vector prime boost in IFNAR/CD46 mice. Cancer Immunol Immunother 2019; 68:533-544. [PMID: 30656384 PMCID: PMC11028090 DOI: 10.1007/s00262-018-2272-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Accepted: 11/01/2018] [Indexed: 12/20/2022]
Abstract
Cancer immunotherapy is seeing an increasing focus on vaccination with tumor-associated antigens (TAAs). Human telomerase (hTERT) is a TAA expressed by most tumors to overcome telomere shortening. Tolerance to hTERT can be easily broken both naturally and experimentally and hTERT DNA vaccine candidates have been introduced in clinical trials. DNA prime/boost strategies have been widely developed to immunize efficiently against infectious diseases. We explored the use of a recombinant measles virus (MV) hTERT vector to boost DNA priming as recombinant live attenuated measles virus has an impressive safety and efficacy record. Here, we show that a MV-TERT vector can rapidly and strongly boost DNA hTERT priming in MV susceptible IFNAR/CD46 mouse models. The cellular immune responses were Th1 polarized. No humoral responses were elicited. The 4 kb hTERT transgene did not impact MV replication or induction of cell-mediated responses. These findings validate the MV-TERT vector to boost cell-mediated responses following DNA priming in humans.
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Affiliation(s)
- Elodie Pliquet
- Invectys, Pépinière Paris Santé Cochin, 27, rue du Faubourg Saint Jacques, 75014, Paris, France.
- Molecular Retrovirology Unit, Institut Pasteur, CNRS-URA 3015, Paris, France.
| | - Claude Ruffie
- Viral Genomics and Vaccination Unit, Institut Pasteur, CNRS-UMR 3965, Paris, France
| | - Marie Escande
- Invectys, Pépinière Paris Santé Cochin, 27, rue du Faubourg Saint Jacques, 75014, Paris, France
| | - Jessie Thalmensi
- Invectys, Pépinière Paris Santé Cochin, 27, rue du Faubourg Saint Jacques, 75014, Paris, France
| | - Valérie Najburg
- Viral Genomics and Vaccination Unit, Institut Pasteur, CNRS-UMR 3965, Paris, France
| | - Chantal Combredet
- Viral Genomics and Vaccination Unit, Institut Pasteur, CNRS-UMR 3965, Paris, France
| | - Thomas Bestetti
- Invectys, Pépinière Paris Santé Cochin, 27, rue du Faubourg Saint Jacques, 75014, Paris, France
| | - Marion Julithe
- Invectys, Pépinière Paris Santé Cochin, 27, rue du Faubourg Saint Jacques, 75014, Paris, France
| | - Christelle Liard
- Invectys, Pépinière Paris Santé Cochin, 27, rue du Faubourg Saint Jacques, 75014, Paris, France
| | - Thierry Huet
- Invectys, Pépinière Paris Santé Cochin, 27, rue du Faubourg Saint Jacques, 75014, Paris, France
| | - Simon Wain-Hobson
- Invectys, Pépinière Paris Santé Cochin, 27, rue du Faubourg Saint Jacques, 75014, Paris, France
- Molecular Retrovirology Unit, Institut Pasteur, CNRS-URA 3015, Paris, France
| | - Frédéric Tangy
- Viral Genomics and Vaccination Unit, Institut Pasteur, CNRS-UMR 3965, Paris, France
| | - Pierre Langlade-Demoyen
- Invectys, Pépinière Paris Santé Cochin, 27, rue du Faubourg Saint Jacques, 75014, Paris, France
- Molecular Retrovirology Unit, Institut Pasteur, CNRS-URA 3015, Paris, France
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6
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Genetic variants in TERT are associated with risk of gastric cancer in a Chinese Han population. Oncotarget 2018; 7:82727-82732. [PMID: 27825130 PMCID: PMC5347727 DOI: 10.18632/oncotarget.13102] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2016] [Accepted: 09/16/2016] [Indexed: 01/15/2023] Open
Abstract
Telomerase reverse transcriptase (TERT) is a gene within the cancer susceptibility region located at Chr5p15.33, which is associated with multiple cancer types. In this study, we validated the association between TERT polymorphisms and gastric cancer (GC) risk with a case-control study in a Chinese Han population. A total of 302 GC patients and 300 control individuals were recruited. We identified three single nucleotide polymorphisms (SNPs) in TERT that were associated with GC. Odds ratios (ORs) and 95% confidence intervals (CIs) were calculated in logistic regression models after adjusting for age and gender to assess the association. The minor alleles of three SNPs were associated with increased GC risk inallelic model analysis. For two of the SNPs, rs10069690 and rs2853676,, the dominant and additive model frequencies were higher in GC cases compared to controls. Further haplotype analysis revealed a protective effect of haplotype “CG” of the TERT gene, while the haplotype “TA” increased GC risk.Our resultsprovide new evidence for the association between TERT and GC susceptibility in the Chinese Han population.
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7
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Wu Y, Yan M, Li J, Li J, Chen Z, Chen P, Li B, Chen F, Jin T, Chen C. Genetic polymorphisms in TERT are associated with increased risk of esophageal cancer. Oncotarget 2017; 8:10523-10530. [PMID: 28060765 PMCID: PMC5354677 DOI: 10.18632/oncotarget.14451] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Accepted: 12/13/2016] [Indexed: 12/20/2022] Open
Abstract
Single nucleotide polymorphisms (SNPs) in TERT may be associated with susceptibility to esophageal cancer. In this study, we analyzed the association between TERT SNPs and risk of esophageal cancer in 386 esophageal cancer patients and 495 healthy subjects from the Xi'an area of China. Of the four SNPs examined, rs10069690 and rs2242652 were correlated with esophageal cancer risk. Additionally, after adjusting for age and gender, the "Trs10069690Ars2242652", "Trs10069690Grs2242652" haplotypes were associated with an increased risk of esophageal cancer, while the and "Crs10069690Grs2242652" haplotype was associated with a decreased risk of esophageal cancer. These findings suggest that TERT polymorphisms may contribute to the development of esophageal cancer.
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Affiliation(s)
- Yifei Wu
- Key Laboratory of Resource Biology and Biotechnology in Western China (Northwest University), Ministry of Education, Xi’an, Shaanxi 710069, China
| | - Mengdan Yan
- Key Laboratory of Resource Biology and Biotechnology in Western China (Northwest University), Ministry of Education, Xi’an, Shaanxi 710069, China
- Xi’an Tiangen Precision Medical Institute, Xi’an, Shaanxi 710075, China
| | - Jing Li
- Key Laboratory of Resource Biology and Biotechnology in Western China (Northwest University), Ministry of Education, Xi’an, Shaanxi 710069, China
- Xi’an Tiangen Precision Medical Institute, Xi’an, Shaanxi 710075, China
| | - Jingjie Li
- Key Laboratory of Resource Biology and Biotechnology in Western China (Northwest University), Ministry of Education, Xi’an, Shaanxi 710069, China
- Xi’an Tiangen Precision Medical Institute, Xi’an, Shaanxi 710075, China
| | - Zhengshuai Chen
- Key Laboratory of Resource Biology and Biotechnology in Western China (Northwest University), Ministry of Education, Xi’an, Shaanxi 710069, China
- Xi’an Tiangen Precision Medical Institute, Xi’an, Shaanxi 710075, China
| | - Peng Chen
- Key Laboratory of Resource Biology and Biotechnology in Western China (Northwest University), Ministry of Education, Xi’an, Shaanxi 710069, China
- Xi’an Tiangen Precision Medical Institute, Xi’an, Shaanxi 710075, China
- Institution of Basic Medical Science, Xi'an Medical University, Xi’an, Shaanxi 710021, China
| | - Bin Li
- Key Laboratory of Resource Biology and Biotechnology in Western China (Northwest University), Ministry of Education, Xi’an, Shaanxi 710069, China
- Xi’an Tiangen Precision Medical Institute, Xi’an, Shaanxi 710075, China
| | - Fulin Chen
- Key Laboratory of Resource Biology and Biotechnology in Western China (Northwest University), Ministry of Education, Xi’an, Shaanxi 710069, China
| | - Tianbo Jin
- Key Laboratory of Resource Biology and Biotechnology in Western China (Northwest University), Ministry of Education, Xi’an, Shaanxi 710069, China
- Xi’an Tiangen Precision Medical Institute, Xi’an, Shaanxi 710075, China
| | - Chao Chen
- Key Laboratory of Resource Biology and Biotechnology in Western China (Northwest University), Ministry of Education, Xi’an, Shaanxi 710069, China
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8
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An hTERT/ZEB1 complex directly regulates E-cadherin to promote epithelial-to-mesenchymal transition (EMT) in colorectal cancer. Oncotarget 2016; 7:351-61. [PMID: 26540342 PMCID: PMC4808003 DOI: 10.18632/oncotarget.5968] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2015] [Accepted: 10/08/2015] [Indexed: 12/13/2022] Open
Abstract
In human cancer, high telomerase expression is correlated with tumor aggressiveness and metastatic potential. Telomerase activation occurs through telomerase reverse transcriptase (hTERT) induction, which contributes to malignant transformation by stabilizing telomeres. Previous studies have shown that hTERT can promote tumor invasion and metastasis of gastric cancer, liver cancer and esophageal cancer. Epithelial-to-mesenchymal transition (EMT), a requirement for tumor invasion and metastasis, plays a key role in cancer progression. Although hTERT promotes EMT through Wnt signaling in several cancers, it is unknown if other signaling pathways are involved. In the present study, we found that hTERT and ZEB1 form a complex, which directly binds to the E-cadherin promoter, and then inhibits E-cadherin expression and promots EMT in colorectal cancer cells. hTERT overexpression in HCT116 and SW480 cells could induce E-cadherin down-regulation. However, E-cadherin expression was recovered when ZEB1 function was impaired even during hTERT overexpression. Taken together, our findings suggest that hTERT can promote cancer metastasis by stimulating EMT through the ZEB1 pathway and therefore inhibiting them may prevent cancer progression.
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9
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Xie XC, Ge LY, Lai H, Qiu H, Tang F, Qin YZ. The Relationship between Telomerase Activity and Clinicopathological Parameters in Colorectal Cancer: A Meta-Analysis. Balkan Med J 2016; 33:64-71. [PMID: 26966620 DOI: 10.5152/balkanmedj.2015.151182] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2014] [Accepted: 05/19/2015] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND Recently, accumulated research has found that the expression of telomerase activity (TA) was associated with colorectal cancer (CRC) advancement, whereas the TA prognostic effect in CRC patients is still controversial. AIMS To investigate relationships between TA and CRC clinicopathological parameters. STUDY DESIGN Meta-analysis study. METHODS We searched published studies in databases, such as EMBASE, the Cochrane Library, PubMed, and Ovid databases (last search updated to October 2014) by meeting specified search criteria. The quality of the included studies was usually evaluated and a meta-analysis was implemented by Stata 12.0 software. We used an odds ratio (OR) with a 95% confidence interval (CI) to evaluate relationship strengths between TA and CRC clinicopathological parameters. RESULTS In total, 11 studies (715 patients) were included to assess the relation between TA and metastasis-related parameters in CRC patients. The results indicate that a senior TA expression was connected with the existence of lymph node metastasis (180 patients; OR=2.85, 95% CI=1.40-5.81, p=0.004), and tumor site (522 patients; OR=2.93, 95% CI=1.29-6.67, p=0.010). However, a senior TA expression was not connected with tumor size (137 patients; OR=1.57, 95% CI=0.71-3.47, p=0.267), histological differentiation (570 patients; OR=1.28, 95% CI=0.78-2.09, p=0.332), depth of invasion (57 patients; OR=3.76, 95% CI=0.61-23.04, p=0.152), distant metastasis (123 patients; OR=1.76, 95% CI=0.54-5.74, p=0.346), and clinical stage of the cancer (543 patients; OR=1.59, 95% CI=0.74-3.38, p=0.232). CONCLUSION This meta-analysis suggests that a positive TA was correlated with lymph node metastasis progression and tumor site of the CRC but did not correlate with other important clinicopathological parameters. TA can play a useful part in the prognosis and treatment of CRC patients, but further studies are required to confirm this.
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Affiliation(s)
- Xue-Cheng Xie
- Department of Gastrointestinal Surgery, Tumor Hospital of Guangxi Medical University, Nanning, China
| | - Lian-Ying Ge
- Department of Endoscopy Center, Tumor Hospital of Guangxi Medical University, Nanning, China
| | - Hao Lai
- Department of Gastrointestinal Surgery, Tumor Hospital of Guangxi Medical University, Nanning, China
| | - Hai Qiu
- Department of Gastrointestinal Surgery, Tumor Hospital of Guangxi Medical University, Nanning, China
| | - Fan Tang
- Department of Gastrointestinal Surgery, Tumor Hospital of Guangxi Medical University, Nanning, China
| | - Yu-Zhou Qin
- Department of Gastrointestinal Surgery, Tumor Hospital of Guangxi Medical University, Nanning, China
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10
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hTERT mediates gastric cancer metastasis partially through the indirect targeting of ITGB1 by microRNA-29a. Sci Rep 2016; 6:21955. [PMID: 26903137 PMCID: PMC4763288 DOI: 10.1038/srep21955] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Accepted: 02/02/2016] [Indexed: 02/04/2023] Open
Abstract
Human telomerase reverse transcriptase (hTERT) plays a key role in tumor invasion and metastasis, but the mechanism of its involvement in these processes is not clear. The purpose of this study is to investigate the possible molecular mechanism of hTERT in the promotion of gastric cancer (GC) metastasis. We found that the up-regulation of hTERT in gastric cancer cells could inhibit the expression of miR-29a and enhance the expression of Integrin β1 (ITGB1). In addition, the invasive capacity of gastric cancer cells was also highly increased after hTERT overexpression. Our study also found that the restoration of miR-29a suppressed the expression of ITGB1 and inhibited GC cell metastasis both in vitro and in vivo. Taken together, our results suggested that hTERT may promote GC metastasis through the hTERT-miR-29a-ITGB1 regulatory pathway.
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11
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Lü MH, Tang B, Zeng S, Hu CJ, Xie R, Wu YY, Wang SM, He FT, Yang SM. Long noncoding RNA BC032469, a novel competing endogenous RNA, upregulates hTERT expression by sponging miR-1207-5p and promotes proliferation in gastric cancer. Oncogene 2015; 35:3524-34. [PMID: 26549025 DOI: 10.1038/onc.2015.413] [Citation(s) in RCA: 151] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2015] [Revised: 08/18/2015] [Accepted: 09/28/2015] [Indexed: 12/14/2022]
Abstract
Long noncoding RNAs (lncRNAs) are emerging as new players in gene regulation and are associated with the development of cancers. To investigate the important role and mechanism of lncRNAs in the progression of gastric cancer, we screened lncRNAs in gastric cancer tissues and corresponding adjacent tissues, and assessed the effects on gastric cancer. Here, we report that BC032469, a novel lncRNA, expressed highly in gastric cancer tissues, and the upregulation was clinically associated with larger tumor size, poor differentiation and shorter survival of gastric cancer patients. Downregulation of BC032469 resulted in a significant inhibition of proliferation in vitro and in vivo. Mechanistically, BC032469 could directly bind to miR-1207-5p and effectively functioned as a sponge for miR-1207-5p to modulate the derepression of hTERT. Thus, BC032469 may function as a ceRNA to impair miR-1207-5p-dependent hTERT downregulation, suggesting that it may be clinically valuable as a poor prognostic biomarker of gastric cancer.
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Affiliation(s)
- M-H Lü
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing, China.,Department of Gastroenterology, The Affiliated Hospital of Luzhou Medical College, Luzhou, China
| | - B Tang
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing, China
| | - S Zeng
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing, China
| | - C-J Hu
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing, China
| | - R Xie
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing, China
| | - Y-Y Wu
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing, China
| | - S-M Wang
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing, China
| | - F-T He
- Department of Biochemistry and Molecular Biology, College of Basic Medical Sciences, Third Military Medical University, Chongqing, China
| | - S-M Yang
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing, China
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12
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Zhang D, Xiao YF, Zhang JW, Xie R, Hu CJ, Tang B, Wang SM, Wu YY, Hao NB, Yang SM. miR-1182 attenuates gastric cancer proliferation and metastasis by targeting the open reading frame of hTERT. Cancer Lett 2015; 360:151-9. [PMID: 25662441 DOI: 10.1016/j.canlet.2015.01.044] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2014] [Revised: 01/16/2015] [Accepted: 01/31/2015] [Indexed: 12/15/2022]
Abstract
In humans, telomerase reverse transcriptase (hTERT) determines the activity of telomerase. hTERT is an ideal anticancer target because it is universally expressed in cancer cells and plays a crucial role in carcinogenesis. In this study, we report the miR-1182-mediated post-transcriptional regulation of hTERT. Over-expression of miR-1182 in different gastric cancer cells decreased hTERT protein levels. Bioinformation and dual-luciferase assays revealed that miR-1182 modulated hTERT by binding to its open reading frame (ORF), and this miRNA recognizes elements in the nucleotide region between 2695 and 2719 of hTERT mRNA. Over-expression of hTERT by transfecting pIRES2-hTERT into U2OS cells was abolished by miR-1182, while pIRES2-hTERT-MT, in which miR-1182 target site was synonymously mutated, failed to respond to miR-1182. Further investigation revealed that miR-1182 inhibited gastric cancer proliferation and migration by targeting the ORF1 of hTERT. We also found that miR-1182 could attenuate the proliferative and metastatic potential of SGC-7901 cell in vivo. Moreover, we found a statistically significant inverse correlation between miR-1182 and hTERT protein levels in tissues from 42 gastric cancer patients. These data indicate that miR-1182 suppresses TERT, and thus it could be an effective target for the treatment of gastric cancer.
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Affiliation(s)
- Dan Zhang
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, China
| | - Yu-Feng Xiao
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, China
| | - Jian-Wei Zhang
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, China
| | - Rui Xie
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, China
| | - Chang-Jiang Hu
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, China
| | - Bo Tang
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, China
| | - Su-Min Wang
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, China
| | - Yu-Yun Wu
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, China
| | - Ning-Bo Hao
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, China.
| | - Shi-Ming Yang
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, China.
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13
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Kar A, Chowdhury S. Inhibition of telomerase activity by NME2: impact on metastasis suppression? Naunyn Schmiedebergs Arch Pharmacol 2014; 388:235-41. [PMID: 25547372 PMCID: PMC4469096 DOI: 10.1007/s00210-014-1077-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2014] [Accepted: 11/25/2014] [Indexed: 12/25/2022]
Abstract
Though anti-metastatic function of non-metastatic 2 (NME2) has been implicated in multiple cancers, mechanisms of metastases control by NME2 are not clearly understood. Recent observations indicating the involvement of telomerase, the ribonucleoprotein required for telomere synthesis, in metastatic outcome are interesting. Notably, though the role of telomerase dysfunction in tumorigenesis is relatively well studied, involvement in metastasis progression is poorly understood. Recent findings demonstrate NME2 presence at telomere ends, association with telomerase, and NME2’s role in inhibition of telomerase activity in cancer cells. These present a novel opportunity to investigate mechanisms underlying NME2-mediated metastasis suppression.
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Affiliation(s)
- Anirban Kar
- Proteomics and Structural Biology Unit, CSIR-Institute of Genomics and Integrative Biology, Mathura Road, New Delhi, 110025, DELHI, India
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14
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A meta-analysis: to compare the clinical results between gastric bypass and sleeve gastrectomy for the obese patients. Obes Surg 2014; 23:1001-10. [PMID: 23595210 DOI: 10.1007/s11695-013-0938-7] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
We attempted to compare the effects of two kinds of surgery for obesity: laparoscopic gastric bypass (LGB) and laparoscopic sleeve gastrectomy (LSG). We performed an electronic literature search of published articles relating to obesity surgery since inception to July 2012, in which LGB was compared with LSG for patients with a body mass index (BMI) >30, and eight studies were finally selected. We recorded a benefit of LGB on the change of BMI (OR = 1.84, 95 % CI = 0.50-3.18). Besides, we found that the homeostasis model assessment was lower after LGB than LSG (OR = -0.83, 95 % CI = -1.43 to -0.22), the total cholesterol was also lower (OR = -17.43, 95 % CI = -34.72 to -0.14), and the high-density lipoprotein cholesterol was higher in the LGB group (OR = 3.27, 95 % CI = 0.48-6.06). Based on these findings, LGB could have a better effect compared with LSG.
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15
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Chen L, Lü MH, Zhang D, Hao NB, Fan YH, Wu YY, Wang SM, Xie R, Fang DC, Zhang H, Hu CJ, Yang SM. miR-1207-5p and miR-1266 suppress gastric cancer growth and invasion by targeting telomerase reverse transcriptase. Cell Death Dis 2014; 5:e1034. [PMID: 24481448 PMCID: PMC4040688 DOI: 10.1038/cddis.2013.553] [Citation(s) in RCA: 109] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2013] [Revised: 11/25/2013] [Accepted: 12/12/2013] [Indexed: 12/31/2022]
Abstract
hTERT is the catalytic subunit of the telomerase complex. Elevated expression of hTERT is associated with the expansion and metastasis of gastric tumor. In this study, we aimed to identify novel tumor suppressor miRNAs that restrain hTERT expression. We began our screen for hTERT-targeting miRNAs with a miRNA microarray. miRNA candidates were further filtered by bioinformatic analysis, general expression pattern in different cell lines, gain-of-function effects on hTERT protein and the potential of these effects to suppress hTERT 3′ untranslated region (3′UTR) luciferase activity. The clinical relevance of two miRNAs (miR-1207-5p and miR-1266) was evaluated by real-time RT-PCR. The effects of these miRNAs on cell growth, cell cycle and invasion of gastric cancer cells were measured with CCK-8, flow cytometry and transwell assays. Finally, the ability of these miRNAs to suppress the transplanted tumors was also investigated. Fourteen miRNAs were identified using a combination of bioinformatics and miRNA microarray analysis. Of these fourteen miRNAs, nine were expressed at significantly lower levels in hTERT-positive cell lines compared with hTERT-negative cell lines and five could downregulate hTERT protein expression. Only miR-1207-5p and miR-1266 interacted with the 3′ UTR of hTERT and the expression levels of these two miRNAs were significantly decreased in gastric cancer tissues. These two miRNAs also inhibited gastric tumor growth in vitro and in vivo. Altogether, miR-1207-5p and miR-1266 were determined to be hTERT suppressors in gastric cancer, and the delivery of these two miRNAs represents a novel therapeutic strategy for gastric cancer treatment.
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Affiliation(s)
- L Chen
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, China
| | - M-H Lü
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, China
| | - D Zhang
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, China
| | - N-B Hao
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, China
| | - Y-H Fan
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, China
| | - Y-Y Wu
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, China
| | - S-M Wang
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, China
| | - R Xie
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, China
| | - D-C Fang
- Institute of Gastroenterology, Southwest Hospital, Third Military Medical University, Chongqing 400037, China
| | - H Zhang
- Department of Gastroenterology, The Second Affiliated Hospital, Chongqing Medical University, Chongqing 400037, China
| | - C-J Hu
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, China
| | - S-M Yang
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, China
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16
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Lü MH, Liao ZL, Zhao XY, Fan YH, Lin XL, Fang DC, Guo H, Yang SM. hTERT-based therapy: a universal anticancer approach (Review). Oncol Rep 2012; 28:1945-52. [PMID: 22992764 DOI: 10.3892/or.2012.2036] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2012] [Accepted: 08/22/2012] [Indexed: 11/05/2022] Open
Abstract
Human telomerase reverse transcriptase (hTERT) has been identified as a major protein involved in aberrant cell proliferation, immortalization, metastasis and stemness maintenance in a majority of tumors, yet it has little or no expression in normal somatic cells. During the past few years, the development of hTERT-based therapies such as immunotherapy, suicide gene therapy and small-molecule interfering therapy have become critical and specific for eradicating all types of cancer. Here, current knowledge regarding hTERT and its involvement in various cancers and its role as a target of cancer therapies are reviewed. Additionally, hurdles to new cancer therapy development and new therapeutic opportunities are described, along with areas that require further investigation.
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Affiliation(s)
- Mu-Han Lü
- Department of Gastroenterology, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, PR China
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