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Mervic A, Goricar K, Blagus T, Franko A, Trebusak-Podkrajsek K, Fikfak MD, Dolzan V, Kovac V. Telomere length and TERT polymorphisms as biomarkers in asbestos-related diseases. Radiol Oncol 2024; 58:87-98. [PMID: 38378028 PMCID: PMC10878767 DOI: 10.2478/raon-2024-0009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Accepted: 09/13/2023] [Indexed: 02/22/2024] Open
Abstract
BACKGROUND Asbestos exposure has been proposed as a risk factor for shorter telomere length. The aim of our study was to investigate whether telomere length in leukocytes and hTERT genetic polymorphisms may serve as potential biomarkers for the risk of developing asbestos-related diseases and as biomarkers of progression and chemotherapy response rate in malignant mesothelioma (MM). SUBJECTS AND METHODS We conducted two retrospective studies. In the first study, a case-control study, telomere length and hTERT polymorphisms were determined in patients with MM, subjects with pleural plaques and controls without the asbestos related disease, who were occupationally exposed to asbestos. In the second study, a longitudinal observational study, telomere length was also determined in samples from MM patients before and after chemotherapy. Telomere length was determined by monochromatic multiplex quantitative polymerase chain reaction (PCR), while competitive allele-specific PCR was used to genotype hTERT rs10069690, rs2736100 and rs2736098. Logistic regression and survival analysis were used in statistical analysis. RESULTS Patients with MM had shorter telomere length than subjects with pleural plaques (p < 0.001). After adjustment for age, rs2736098 CT, and rs10069690 TT and CT+TT genotypes were significantly associated with a higher risk of MM (padj = 0.023; padj = 0.026 and padj = 0.017), while rs2736100 AA and CA+AA genotypes conferred to a lower risk for MM compared to all other subjects (padj = 0.017, and padj = 0.026). Telomere length was not associated with a response to chemotherapy (p > 0.05) or time to disease progression (p > 0.05). Carriers of one or two polymorphic rs10069690 T alleles had a good response to chemotherapy (p = 0.039, and p = 0.048), these associations remained statistically significant after adjustment for age (padj = 0.019; padj = 0.017). Carriers of two polymorphic rs2736100 A alleles had a longer time to disease progression (p = 0.038). CONCLUSIONS Shorter telomere length and hTERT polymorphisms may serve as a biomarker for the risk of developing MM. Additionally, rs10069690 and rs2736100 polymorphisms, but not telomere length, were associated with a chemotherapy response or MM progression.
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Affiliation(s)
- Ana Mervic
- Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia
| | - Katja Goricar
- Institute of Biochemistry and Molecular Genetics, Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia
| | - Tanja Blagus
- Institute of Biochemistry and Molecular Genetics, Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia
| | - Alenka Franko
- Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia
- Clinical Institute of Occupational Medicine, University Medical Centre Ljubljana, Ljubljana, Slovenia
| | - Katarina Trebusak-Podkrajsek
- Institute of Biochemistry and Molecular Genetics, Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia
- Clinical Institute for Special Laboratory Diagnostics, University Children’s Hospital, University Medical Centre Ljubljana, Ljubljana, Slovenia
| | - Metoda Dodic Fikfak
- Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia
- Clinical Institute of Occupational Medicine, University Medical Centre Ljubljana, Ljubljana, Slovenia
| | - Vita Dolzan
- Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia
- Institute of Biochemistry and Molecular Genetics, Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia
| | - Viljem Kovac
- Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia
- Institute of Oncology Ljubljana, Ljubljana, Slovenia
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Zhou Q, Wang Y, Xin C, Wei X, Yao Y, Xia L. Identification of telomere-associated gene signatures to predict prognosis and drug sensitivity in glioma. Comput Biol Med 2024; 168:107750. [PMID: 38029531 DOI: 10.1016/j.compbiomed.2023.107750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 11/11/2023] [Accepted: 11/20/2023] [Indexed: 12/01/2023]
Abstract
OBJECTIVE Gliomas are a heterogeneous group of brain tumors with distinct biological and clinical properties, leading to significant mortality and morbidity. Emerging evidence shows telomere maintenance has implicated in glioma susceptibility and prognosis. In this study, we comprehensively analyzed gene signatures related to telomere maintenance in glioma and their predictive values for predicting the prognosis and drug sensitivity in glioma. METHODS We initially identified telomere-related genes differentially expressed between low-grade glioma (LGG) and glioblastoma (GBM) and accordingly developed a risk model by univariate and multivariate Cox analysis to assess the expressions of telomere-related genes across the risk groups. Finally, to assess these genes in immune function the anti-tumor medications often used in the clinical treatment of glioma, we computed immune cell infiltration analysis and drug sensitivity analysis. RESULTS The consensus clustering analysis identified 20 telomere-related genes which split LGG patients into two distinct subtypes. The patient survival, the expressions of key telomere-related DEGs, and immune cell infiltration significantly differed between Cluster 1 and Cluster 2. The LASSO risk model [riskScore=(0.086)*HOXA7+(0.242)*WEE1+(0.247)*IGF2BP3+(0.052)*DUSP10] showed significant differences regarding the 1-, 3-, 5-year overall survival, immune cell infiltration, and drug sensitivity between high- and low-risk groups. The predictive nomogram constructed to quantify the survival probability of each sample at 1, 3, and 5 years was consistent with the actual patient survival. CONCLUSION Our comprehensive characterization of telomere-associated gene signatures in glioma reveals their possible roles in the development, tumor microenvironment, and prognosis. The study provides some suggestive relationships between four telomere-related genes (HOXA7, WEE1, IGF2BP3, and DUSP10) and glioma prognosis.
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Affiliation(s)
- Qingqing Zhou
- Department of Neurosurgery, The First Affiliated Hospital of Yangtze University, Jingzhou First People's Hospital, Jingzhou, 434000, People's Republic of China
| | - Yamei Wang
- Department of Neurology, The First Affiliated Hospital of Yangtze University, Jingzhou First People's Hospital, Jingzhou, 434000, People's Republic of China
| | - Chenqi Xin
- Department of Scientific Research, The First Affiliated Hospital of Yangtze University, Jingzhou First People's Hospital, Jingzhou, 434000, People's Republic of China
| | - XiaoMing Wei
- Department of Neurosurgery, The First Affiliated Hospital of Yangtze University, Jingzhou First People's Hospital, Jingzhou, 434000, People's Republic of China
| | - Yuan Yao
- Department of Neurosurgery, The First Affiliated Hospital of Yangtze University, Jingzhou First People's Hospital, Jingzhou, 434000, People's Republic of China.
| | - Liang Xia
- Department of Neurosurgery, The Cancer Hospital of the University of Chinese Academy of Sciences (Zhejiang Cancer Hospital) Institute of Basic Medicine and Cancer (IBMC), Chinese Academy of Sciences, Hangzhou, 310022, People's Republic of China.
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Yu M, Yang D, Chen C, Xia H. Effects of SETD2 on telomere length and malignant transformation property of Met-5A after one-month crocidolite exposure. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART C, TOXICOLOGY AND CARCINOGENESIS 2023; 41:121-134. [PMID: 37899647 DOI: 10.1080/26896583.2023.2271822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/31/2023]
Abstract
Crocidolite is a carcinogen contributing to the pathogenesis of malignant mesothelioma. This study aimed to characterize the possible telomere-related events mediating the malignant transformation of mesothelial cells with and without SETD2 under crocidolite exposure. The crocidolite concentration resulting in 90% viable SETD2 knockout Met-5A (Met-5ASETD2-KO) and Met-5A were estimated to be 0.71 μg/cm2 and 1.8 μg/cm2, respectively, during 72 h of exposure, which was further employed in chronical crocidolite exposure during a 72 h exposure interval per time up to 1 month. Chronical crocidolite-exposed Met-5ASETD2-KO (chronical Cro-Met-5ASETD2-KO) had higher colony formation and increased telomerase reverse transcriptase (TERT) protein levels than chronical crocidolite-exposed Met-5A (chronical Cro-Met-5A) and Met-5ASETD2-KO. Chronical Cro-Met-5ASETD2-KO had longer telomere length (TL) than chronical Cro-Met-5A, although there were no changes in TL for either chronical Cro-Met-5A or chronical Cro-Met-5ASETD2-KO compared with their corresponding cells without crocidolite exposure. BIBR 1532, an inhibitor targeting TERT, partially reduced colony formation and TL for chronical Cro-Met-5ASETD2-KO, while BIBR 1532 reduced TL but had no effect on colony formation for chronical Cro-Met-5A. Therefore, SETD2 deficient mesothelial cells are susceptible to malignant transformation during chronical crocidolite exposure, and TERT-dependent TL modification likely partially drives SETD2 loss-mediated early onset of mesothelial malignant transformation.
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Affiliation(s)
- Min Yu
- Department of Occupational Health & Radiation Hygiene, Hangzhou Hospital for the Prevention and Treatment of Occupational Disease, Hangzhou, Zhejiang, China
- School of Public Heath, Hangzhou Medical College, Hangzhou, Zhejiang, China
| | - Dan Yang
- School of Public Heath, Hangzhou Medical College, Hangzhou, Zhejiang, China
| | - Chiyun Chen
- Department of Pulmonary and Critical Care Medicine, Cixi People Hospital Medical Health Group (Cixi People Hospital), Cixi, Zhejiang, China
| | - Hailing Xia
- School of Public Heath, Hangzhou Medical College, Hangzhou, Zhejiang, China
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Multiwalled Carbon Nanotubes Induce Fibrosis and Telomere Length Alterations. Int J Mol Sci 2022; 23:ijms23116005. [PMID: 35682685 PMCID: PMC9181372 DOI: 10.3390/ijms23116005] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 05/23/2022] [Accepted: 05/25/2022] [Indexed: 02/01/2023] Open
Abstract
Telomere shortening can result in cellular senescence and in increased level of genome instability, which are key events in numerous of cancer types. Despite this, few studies have focused on the effect of nanomaterial exposure on telomere length as a possible mechanism involved in nanomaterial-induced carcinogenesis. In this study, effects of exposure to multiwalled carbon nanotubes (MWCNT) on telomere length were investigated in mice exposed by intrapleural injection, as well as in human lung epithelial and mesothelial cell lines. In addition, cell cycle, apoptosis, and regulation of genes involved in DNA damage repair were assessed. Exposure to MWCNT led to severe fibrosis, infiltration of inflammatory cells in pleura, and mesothelial cell hyperplasia. These histological alterations were accompanied by deregulation of genes involved in fibrosis and immune cell recruitment, as well as a significant shortening of telomeres in the pleura and the lung. Assessment of key carcinogenic mechanisms in vitro confirmed that long-term exposure to the long MWCNT led to a prominent telomere shortening in epithelial cells, which coincided with G1-phase arrest and enhanced apoptosis. Altogether, our data show that telomere shortening resulting in cell cycle arrest and apoptosis may be an important mechanism in long MWCNT-induced inflammation and fibrosis.
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Zhang G, Dong R, Kong D, Liu B, Zha Y, Luo M. The Effect of GLUT1 on Survival Rate and the Immune Cell Infiltration of Lung Adenocarcinoma and Squamous Cell Carcinoma: A Meta and Bioinformatics Analysis. Anticancer Agents Med Chem 2021; 22:223-238. [PMID: 34238200 DOI: 10.2174/1871520621666210708115406] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 05/01/2021] [Accepted: 05/04/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND Lung adenocarcinoma (LUAD) and squamous cell carcinoma (LUSC) are two major subtypes of non-small cell lung cancer (NSCLC). Studies have shown that abnormal expression of glucose transport type 1 (GLUT1) in NSCLC patients has been associated with progression, aggressiveness, and poor clinical outcome. However, the clinical effect of GLUT1 expression on LUAD and LUSC is unclear. OBJECTIVE This study aims to learn more about the character of GLUT1 in LUAD and LUSC. METHODS A meta-analysis was performed to evaluate the GLUT1 protein level, and bioinformatics analysis was used to detect the GLUT1 mRNA expression level, survival differences, and the infiltration abundance of immune cells in samples from TCGA. Meanwhile, functional and network analysis was conducted to detect important signaling pathways and key genes with the Gene Expression Omnibus (GEO) dataset. RESULTS Our results showed that GLUT1 was over-expressed both in LUAD and LUSC. LUAD patients with high GLUT1 expression had a poor prognosis. Additionally, GLUT1 was related to B cell and neutrophil infiltration of LUAD. In LUSC, GLUT1 was correlated with tumor purity, B cell, CD8+ T cell, CD4+ T cell, macrophage, neutrophil, and dendritic cell infiltration. The GEO dataset analysis results suggested GLUT1 potentially participated in the p53 signaling pathway and metabolism of xenobiotics by cytochrome P450 and was associated with KDR, TOX3, AGR2, FOXA1, ERBB3, ANGPT1, and COL4A3 gene in LUAD and LUSC. CONCLUSION GLUT1 might be a potential biomarker for aggressive progression and poor prognosis in LUAD, and a therapeutic biomarker in LUSC.
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Affiliation(s)
- Guihua Zhang
- Guizhou University School of Medicine, Guizhou University, Gui Yang, China
| | - Rong Dong
- Guizhou University School of Medicine, Guizhou University, Gui Yang, China
| | - Demiao Kong
- Department of Thoracic Surgery, Guizhou Provincial People's Hospital, Gui Yang, China
| | - Bo Liu
- Department of Thoracic Surgery, Guizhou Provincial People's Hospital, Gui Yang, China
| | - Yan Zha
- Guizhou University School of Medicine, Guizhou University, Gui Yang, China
| | - Meng Luo
- Guizhou University School of Medicine, Guizhou University, Gui Yang, China
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Wils RS, Jacobsen NR, Di Ianni E, Roursgaard M, Møller P. Reactive oxygen species production, genotoxicity and telomere length in FE1-Muta™Mouse lung epithelial cells exposed to carbon nanotubes. Nanotoxicology 2021; 15:661-672. [PMID: 33899660 DOI: 10.1080/17435390.2021.1910359] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Carbon nanotubes (CNTs) are fiber-like nanomaterials, which are used in various applications with possible exposure to humans. The genotoxicity and carcinogenic potential of CNTs remain to be fully understood. This study assessed the genotoxicity of three different multi-walled carbon nanotubes (MWCNTs) (MWCNT-7, NM-401 and NM-403) and one single-walled carbon nanotube (SWCNT) (NM-411) in FE1-Muta™Mouse lung epithelial (MML) cells using the alkaline comet assay. With the 2',7'-dichlorodihydrofluorescein diacetate fluorescent probe, we assessed the effect of CNT-exposure on the intracellular production of reactive oxygen species (ROS). We measured the effect of a 10-week CNT exposure on telomere length using quantitative PCR. Two of the included MWCNTs (NM-401 and MWCNT-7) and the SWCNT (NM-411) caused a significant increase in the level of DNA damage at concentrations up to 40 µg/ml (all concentrations pooled, p < 0.05), but no concentration-response relationships were found. All of the CNTs caused an increase in intracellular ROS production compared to unexposed cells (ptrend < 0.05). Results from the long-term exposure showed longer telomere length in cells exposed to MWCNTs compared to unexposed cells (p < 0.01). In conclusion, our results indicated that the included CNTs cause ROS production and DNA strand breaks in FE1-MML cells. Moreover, the MWCNTs, but not the SWCNT, had an impact on telomere length in a long-term exposure scenario.
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Affiliation(s)
- Regitze Sølling Wils
- Section of Environmental Health, Department of Public Health, University of Copenhagen, Copenhagen K, Denmark.,The National Research Centre for the Working Environment, Copenhagen Ø, Denmark
| | | | - Emilio Di Ianni
- The National Research Centre for the Working Environment, Copenhagen Ø, Denmark
| | - Martin Roursgaard
- Section of Environmental Health, Department of Public Health, University of Copenhagen, Copenhagen K, Denmark
| | - Peter Møller
- Section of Environmental Health, Department of Public Health, University of Copenhagen, Copenhagen K, Denmark
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