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Drokow EK, Effah CY, Agboyibor C, Budu JT, Arboh F, Kyei-Baffour PA, Xiao Y, Zhang F, Wu IXY. Microbial infections as potential risk factors for lung cancer: Investigating the role of human papillomavirus and chlamydia pneumoniae. AIMS Public Health 2023; 10:627-646. [PMID: 37842273 PMCID: PMC10567973 DOI: 10.3934/publichealth.2023044] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 06/22/2023] [Accepted: 07/03/2023] [Indexed: 10/17/2023] Open
Abstract
Background Lung cancer is the leading cause of cancer morbidity and mortality worldwide. Apart from tobacco smoke and dietary factors, microbial infections have been reported as the third leading cause of cancers globally. Deciphering the association between microbiome and lung cancer will provide potential biomarkers and novel insight in lung cancer progression. In this current study, we performed a meta-analysis to decipher the possible association between C. pneumoniae and human papillomavirus (HPV) and the risk of lung cancer. Methods Literature search was conducted in most English and Chinese databases. Data were analyzed using CMA v.3.0 and RevMan v.5.3 software (Cochrane-Mantel-Haenszel method) by random-effects (DerSimonian and Laird) model. Results The overall pooled estimates for HPV studies revealed that HPV infections in patients with lung cancer were significantly higher than those in the control group (OR = 2.33, 95% CI = 1.57-3.37, p < 0.001). Base on subgroup analysis, HPV infection rate was significantly higher in Asians (OR = 6.38, 95% CI = 2.33-17.46, p < 0.001), in tissues (OR = 5.04, 95% CI = 2.27-11.19, p < 0.001) and blood samples (OR = 1.40, 95% CI = 1.02-1.93, p = 0.04) of lung cancer patients but non-significantly lower in males (OR = 0.84, 95% CI = 0.57-1.22, p =0.35) and among lung cancer patients at clinical stage I-II (OR = 0.95, 95% CI = 0.61-1.49, p = 0.82). The overall pooled estimates from C. pneumoniae studies revealed that C. pneumoniae infection is a risk factor among lung cancer patients who are IgA seropositive (OR = 1.88, 95% CI = 1.30-2.70, p < 0.001) and IgG seropositive (OR = 1.50, 95% CI = 1.10-2.04, p = 0.010). All seronegative IgA (OR = 0.69, 95% CI = 0.42-1.16, p = 0.16) and IgG (OR = 0.66, 95% CI = 0.42-105, p = 0.08) titers are not associative risk factors to lung cancer. Conclusions Immunoglobulin (IgA) and IgG seropositive titers of C. pneumoniae and lungs infected with HPV types 16 and 18 are potential risk factors associated with lung cancer.
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Affiliation(s)
- Emmanuel Kwateng Drokow
- Hunan Provinical Key Laboratory of Clinical Epidemiology, Central South University, Changsha 410083, Hunan, China
- Department of Epidemiology and Biostatistics, Xiangya School of Public Health, Central South University, Changsha 410083, Hunan, China
| | - Clement Yaw Effah
- General ICU, The First Affiliated Hospital of Zhengzhou University, Henan Key Laboratory of Critical Care Medicine, Zhengzhou Key Laboratory of Sepsis, Henan Engineering Research Center for Critical Care Medicine, Zhengzhou 450003, China
| | - Clement Agboyibor
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, China
| | | | - Francisca Arboh
- Department of Health Policy and Management, School of Management, Jiangsu University, 301 Xuefu Road, Zhenjiang, 212013 Jiangsu Province, China
| | | | - Yao Xiao
- University of Ghana Medical Center, Accra, Ghana
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Fan Zhang
- Department of Gynecology, Xiangya Hospital, Central South University, Changsha, Hunan, China, 410008
| | - Irene XY Wu
- Hunan Provinical Key Laboratory of Clinical Epidemiology, Central South University, Changsha 410083, Hunan, China
- Department of Epidemiology and Biostatistics, Xiangya School of Public Health, Central South University, Changsha 410083, Hunan, China
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Zhang L, Chen J, Yang H, Pan C, Li H, Luo Y, Cheng T. Multiple microarray analyses identify key genes associated with the development of Non-Small Cell Lung Cancer from Chronic Obstructive Pulmonary Disease. J Cancer 2021; 12:996-1010. [PMID: 33442399 PMCID: PMC7797649 DOI: 10.7150/jca.51264] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Accepted: 11/30/2020] [Indexed: 12/13/2022] Open
Abstract
Introduction: Chronic obstructive pulmonary disease (COPD) is an independent risk factor of non-small cell lung cancer (NSCLC). This study aimed to analyze the key genes and potential molecular mechanisms that are involved in the development from COPD to NSCLC. Methods: Expression profiles of COPD and NSCLC in GSE106899, GSE12472, and GSE12428 were downloaded from the Gene Expression Omnibus (GEO) database, followed by identification of the differentially expressed genes (DEGs) between COPD and NSCLC. Based on the identified DEGs, functional pathway enrichment and lung carcinogenesis-related networks analyses were performed and further visualized with Cytoscape software. Then, principal component analysis (PCA), cluster analysis, and support vector machines (SVM) verified the ability of the top modular genes to distinguish COPD from NSCLC. Additionally, the corrections between these key genes and clinical staging of NSCLC were studied using the UALCAN and HPA websites. Finally, a prognostic risk model was constructed based on multivariate Cox regression analysis. Kaplan-Meier survival curves of the top modular genes on the training and verification sets were generated. Results: A total of 2350, 1914, and 1850 DEGs were obtained from GSE106899, GSE12472, and GSE12428 datasets, respectively. Following analysis of protein-protein interaction networks, the identified modular gene signatures containing H2AFX, MCM2, MCM3, MCM7, POLD1, and RPA1 were identified as markers for discrimination between COPD and NSCLC. The modular gene signatures were mainly enriched in the processes of DNA replication, cell cycle, mismatch repair, and others. Besides, the expression levels of these genes were significantly higher in NSCLC than in COPD, which was further verified by the immunohistochemistry. In addition, the high expression levels of H2AFX, MCM2, MCM7, and POLD1 correlate with poor prognosis of lung adenocarcinoma (LUAD). The Cox regression prognostic risk model showed the similar results and the predictive ability of this model is independent of other clinical variables. Conclusions: This study revealed several key modules that closely relate to NSCLC with underlying disease COPD, which provide a deeper understanding of the potential mechanisms underlying the malignant development from COPD to NSCLC. This study provides valuable prognostic factors in high-risk lung cancer patients with COPD.
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Affiliation(s)
- Lemeng Zhang
- Thoracic Medicine Department 1, Hunan Cancer Hospital, Changsha, Hunan Province, P.R. China, 410013
| | - Jianhua Chen
- Thoracic Medicine Department 1, Hunan Cancer Hospital, Changsha, Hunan Province, P.R. China, 410013
| | - Hua Yang
- Thoracic Medicine Department 1, Hunan Cancer Hospital, Changsha, Hunan Province, P.R. China, 410013
| | - Changqie Pan
- Thoracic Medicine Department 1, Hunan Cancer Hospital, Changsha, Hunan Province, P.R. China, 410013
| | - Haitao Li
- Thoracic Medicine Department 1, Hunan Cancer Hospital, Changsha, Hunan Province, P.R. China, 410013
| | - Yongzhong Luo
- Thoracic Medicine Department 1, Hunan Cancer Hospital, Changsha, Hunan Province, P.R. China, 410013
| | - Tianli Cheng
- Thoracic Medicine Department 1, Hunan Cancer Hospital, Changsha, Hunan Province, P.R. China, 410013
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Hu Y, Ren S, He Y, Wang L, Chen C, Tang J, Liu W, Yu F. Possible Oncogenic Viruses Associated with Lung Cancer. Onco Targets Ther 2020; 13:10651-10666. [PMID: 33116642 PMCID: PMC7585805 DOI: 10.2147/ott.s263976] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Accepted: 09/02/2020] [Indexed: 01/01/2023] Open
Abstract
Lung cancer is the most common cause of cancer death worldwide. Tobacco smoking is the most predominant etiology for lung cancer. However, only a small percentage of heavy smokers develop lung cancer, which suggests that other cofactors are required for lung carcinogenesis. Viruses have been central to modern cancer research and provide profound insights into cancer causes. Nevertheless, the role of virus in lung cancer is still unclear. In this article, we reviewed the possible oncogenic viruses associated with lung cancer.
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Affiliation(s)
- Yan Hu
- Department of Thoracic Surgery, The Thoracic Surgery Research Room, Second Xiangya Hospital, Central South University, Changsha 410011, People's Republic of China
| | - Siying Ren
- Department of Respiratory Medicine, Hunan Centre for Evidence-Based Medicine, Research Unit of Respiratory Diseases, Second Xiangya Hospital, Central South University, Changsha 410011, People's Republic of China
| | - Yu He
- Department of Thoracic Surgery, The Thoracic Surgery Research Room, Second Xiangya Hospital, Central South University, Changsha 410011, People's Republic of China
| | - Li Wang
- Department of Thoracic Surgery, The Thoracic Surgery Research Room, Second Xiangya Hospital, Central South University, Changsha 410011, People's Republic of China
| | - Chen Chen
- Department of Thoracic Surgery, The Thoracic Surgery Research Room, Second Xiangya Hospital, Central South University, Changsha 410011, People's Republic of China
| | - Jingqun Tang
- Department of Thoracic Surgery, The Thoracic Surgery Research Room, Second Xiangya Hospital, Central South University, Changsha 410011, People's Republic of China
| | - Wenliang Liu
- Department of Thoracic Surgery, The Thoracic Surgery Research Room, Second Xiangya Hospital, Central South University, Changsha 410011, People's Republic of China
| | - Fenglei Yu
- Department of Thoracic Surgery, The Thoracic Surgery Research Room, Second Xiangya Hospital, Central South University, Changsha 410011, People's Republic of China
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Shen H, Zheng E, Yang Z, Yang M, Xu X, Zhou Y, Ni J, Li R, Zhao G. YRDC is upregulated in non-small cell lung cancer and promotes cell proliferation by decreasing cell apoptosis. Oncol Lett 2020; 20:43-52. [PMID: 32565932 PMCID: PMC7285791 DOI: 10.3892/ol.2020.11560] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2019] [Accepted: 09/20/2019] [Indexed: 02/06/2023] Open
Abstract
Non-small cell lung cancer (NSCLC) is the leading cause of cancer-associated mortality worldwide. yrdC N6-threonylcarbamoltransferase domain containing protein (YRDC) has been demonstrated to be involved in the formation of threonylcarbamoyladenosine in transfer ribonucleic acid. However, the molecular mechanisms underlying NSCLC progression remain largely unclear. The present study revealed that YRDC was upregulated in NSCLC samples compared with adjacent non-cancerous tissues by analyzing datasets obtained from the Gene Expression Omnibus and The Cancer Genome Atlas. Higher expression of YRDC was associated with overall survival time and disease-free survival time in patients with NSCLC, particularly in lung adenocarcinoma. Furthermore, knockdown of YRDC in NSCLS cell lines significantly suppressed cell growth and cell colony formation in vitro. Additionally, the results demonstrated that silencing of YRDC induced apoptosis of A549 cells. Then, the protein-protein interaction networks associated with yrdC N6-threonylcarbamoltransferase domain containing protein (YRDC) in NSCLC were subsequently constructed to investigate the potential molecular mechanism underlying the role of YRDC in NSCLC. The results revealed that YRDC was involved in the regulation of spliceosomes, ribosomes, the p53 signaling pathway, proteasomes, the cell cycle and DNA replication. The present study demonstrated that YRDC may serve as a novel biomarker for the prognosis prediction and treatment of NSCLC.
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Affiliation(s)
- Haibo Shen
- Cardiothoracic Surgery Department, Hwa Mei Hospital, University of Chinese Academy of Sciences, Ningbo, Zhejiang 315010, P.R. China
| | - Enkuo Zheng
- Cardiothoracic Surgery Department, Hwa Mei Hospital, University of Chinese Academy of Sciences, Ningbo, Zhejiang 315010, P.R. China
| | - Zhenhua Yang
- Cardiothoracic Surgery Department, Hwa Mei Hospital, University of Chinese Academy of Sciences, Ningbo, Zhejiang 315010, P.R. China
| | - Minglei Yang
- Cardiothoracic Surgery Department, Hwa Mei Hospital, University of Chinese Academy of Sciences, Ningbo, Zhejiang 315010, P.R. China
| | - Xiang Xu
- Cardiothoracic Surgery Department, Hwa Mei Hospital, University of Chinese Academy of Sciences, Ningbo, Zhejiang 315010, P.R. China
| | - Yinjie Zhou
- Cardiothoracic Surgery Department, Hwa Mei Hospital, University of Chinese Academy of Sciences, Ningbo, Zhejiang 315010, P.R. China
| | - Junjun Ni
- Cardiothoracic Surgery Department, Hwa Mei Hospital, University of Chinese Academy of Sciences, Ningbo, Zhejiang 315010, P.R. China
| | - Rui Li
- Cardiothoracic Surgery Department, Hwa Mei Hospital, University of Chinese Academy of Sciences, Ningbo, Zhejiang 315010, P.R. China
| | - Guofang Zhao
- Cardiothoracic Surgery Department, Hwa Mei Hospital, University of Chinese Academy of Sciences, Ningbo, Zhejiang 315010, P.R. China
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Human papillomavirus is not associated to non-small cell lung cancer: data from a prospective cross-sectional study. Infect Agent Cancer 2019; 14:18. [PMID: 31388352 PMCID: PMC6679449 DOI: 10.1186/s13027-019-0235-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Accepted: 07/24/2019] [Indexed: 12/21/2022] Open
Abstract
Background The pathogenesis of lung cancer is triggered by a combination of genetic and environmental factors, being the tobacco smoke the most important risk factor. Nevertheless, the incidence of lung cancer in non-smokers is gradually increasing, which demands the search for different other etiological factors such as occupational exposure, previous lung disease, diet among others. In the early 80’s a theory linked specific types of human papillomavirus (HPV) to lung cancer due to morphological similarities of a subset of bronchial squamous cell carcinomas with other HPV-induced cancers. Since then, several studies revealed variable rates of HPV DNA detection. The current study aimed to provide accurate information on the prevalence of HPV DNA in lung cancer. Methods Biopsies were collected from 77 newly diagnosed non-small cell lung cancer (NSCLC) patients treated at the Thoracic Oncology Department at Barretos Cancer Hospital. The samples were formalin fixed and paraffin embedded (FFPE), histologic analysis was performed by an experienced pathologist. DNA was extracted from FFPE material using a commercial extraction kit and HPV DNA detection was evaluated by multiplex PCR and HPV16 specific real-time PCR. Results HPV was not identified in any of the samples analysed (69). Conclusions Our data demonstrated a lack of HPV DNA in a series of NSCL cancers.
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Human papillomavirus and lung cancer: an overview and a meta-analysis. J Cancer Res Clin Oncol 2019; 145:1919-1937. [PMID: 31236668 DOI: 10.1007/s00432-019-02960-w] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Accepted: 06/20/2019] [Indexed: 01/07/2023]
Abstract
PURPOSE This review is devoted to assessing the prevalence of human papillomavirus (HPV) in lung cancer (LC) in the world. HPV is recognized as the etiological factor of cervical cancer, however, there is widespread evidence that this virus is detected not only in gynecological carcinomas, but also in tumors of other organs, in particular the upper respiratory tract and digestive tract. MATERIALS AND METHODS A search was conducted to a depth of 29 years in the PubMed, Web of Science, Scopus, databases. The review includes 95 articles. RESULTS Of all the analyzed studies (9195 patients), 12 works showed a complete absence of HPV in the biological material in patients with LC. The absence of a virus among lung cancer patients has been established for Canada, the Netherlands and Singapore. The highest average percent of occurrence of this virus is shown for such countries as: Brazil, Korea, Greece and Taiwan (more than 40%). But the highest percentage of HPV occurrence by region is observed in Latin America (33.5%), followed by the Asian countries (31%), in European countries the frequency is 18%. Interestingly, the highest occurrence of high oncogenic types (16 and 18) is observed in Asia (40.3%), then in Latin America (33.6%), Europe (25.6%) and North America (15.4%). Low-oncogenic types (6 and 11) are also predominantly observed in Asia (39.9%), while in Europe and North America 30% and 12.8%, respectively. A meta-analysis of the prevalence of HPV was conducted using Comprehensive Meta-Analysis 3.0. Program, which included 26 studies, the results of which revealed: the prevalence of HPV infection in tumor lung tissue was compared with normal lung tissue OR (95% CI) = 5.38 (3.21-9.00) p < 0.0001, significance was also found for Chinese studies OR = 6.3, 95% CI 3.42-11.53, p < 0.0001, I2 = 71.8% and for nine studies in Europe OR = 6.3, 95% CI 1.8-22.18, p = 0.004, I2 = 51.0%. However, given the fact that the frequency of occurrence of HPV in lung tumor tissue varies greatly, a question may arise about the real role of HPV in LC carcinogenesis, which makes further research relevant and promising.
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Shikova E, Ivanova Z, Alexandrova D, Shindov M, Lekov A. Human papillomavirus prevalence in lung carcinomas in Bulgaria. Microbiol Immunol 2018; 61:427-432. [PMID: 28881043 DOI: 10.1111/1348-0421.12535] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Revised: 08/16/2017] [Accepted: 09/04/2017] [Indexed: 11/29/2022]
Abstract
A possible association between high-risk human papillomaviruses (HPV) and lung cancer has been investigated for decades with discrepant results. The aim of this study was to determine the prevalence of HPV16 and 18 in Bulgarian patients with lung cancer. Two hundred and nine biopsy specimens from patients with histologically proven lung cancer and without cancer were analyzed. Each sample was subjected to three parallel PCRs using broad spectrum GP5+/6+ primers and type-specific (TS) primers for HPV types 16 and 18. Of the 132 lung carcinoma samples, 33 (25%) were positive for HPV16 and/or HPV18 by TS PCR whereas only five (3.8%) samples were HPV positive by consensus PCR. All non-malignant controls were HPV negative. HPV18 was the more prevalent, being found in 11.4% of samples, followed by HPV16 in 9.1% samples; 4.5% of lesions were positive for both HPV16 and HPV18. HPV16/18 were most prevalent in small cell carcinoma (29.2%) and least prevalent in squamous cell carcinoma (23.3%). HPV was only detected in squamous cell carcinoma and adenosquamous carcinoma by consensus PCR. This study revealed a high HPV16/18 prevalence in lung carcinoma samples from Bulgarian patients when TS PCR was used to detect them. The difference between HPV positivity as detected by consensus and by TS PCR was significant, indicating the importance of methodological issues in explaining the discrepancies between previous studies. HPV18 was more common than HPV16. No association between HPV16/18 status and histopathological diagnosis was identified.
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Affiliation(s)
- Evelina Shikova
- National Center for Infectious and Parasitic Diseases, General Stoletov Str. 44А, 1233 Sofia
| | - Zina Ivanova
- National Center for Infectious and Parasitic Diseases, General Stoletov Str. 44А, 1233 Sofia
| | - Dora Alexandrova
- National Specialized Hospital for Active Treatment in Hematological Diseases, Plovdivsko Pole Str. 6, 1756 Sofia
| | - Mihail Shindov
- Specialized Hospital for Active Treatment in Oncology, Plovdivsko Pole Str. 6, 1756 Sofia, Bulgaria
| | - Andrey Lekov
- Aalborg University Copenhagen, A. C. Meyers Vaenge 15, 2450 Copenhagen SV, Denmark
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Xiong WM, Xu QP, Li X, Xiao RD, Cai L, He F. The association between human papillomavirus infection and lung cancer: a system review and meta-analysis. Oncotarget 2017; 8:96419-96432. [PMID: 29221217 PMCID: PMC5707111 DOI: 10.18632/oncotarget.21682] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Accepted: 09/21/2017] [Indexed: 12/19/2022] Open
Abstract
To estimate the global attributable fraction of human papillomavirus (HPV) in lung cancer, we provided updated information through a system review and meta-analysis. We did a literature search on PubMed, Ovid and Web of Science to identify case-control studies and cohort studies that detected HPV in lung carcinomas. We included studies that tested 30 or more cases and were published before Feb 28, 2017. We collected information about gender, smoking status, HPV detection methods, HPV types, materials and clinical features. If it was not possible to abstract the required information directly from the papers, we contacted the authors. A meta-analysis was performed to calculate the pooled effect sizes (OR/RR) with 95% confidence intervals (CI) including subgroup analysis and meta-regression to explore sources of heterogeneity, by Stata 13.0 software. 36 case-control studies, contributing data for 6,980 cases of lung cancer and 7,474 controls from 17 countries and one cohort study with 24,162 exposed and 1,026,986 unexposed from China were included. HPV infection was associated with cancer of lung, pooled OR was 3.64 (95% CI: 2.60–5.08), calculated with the random-effects model. Pooled OR for allogeneic case-control studies, self-matched case-control studies and nested case-control studies were 6.71 (95% CI: 4.07–11.07), 2.59 (95% CI: 1.43–4.69) and 0.92 (95% CI: 0.63–1.36), respectively. Pooled OR for HPV 16 and HPV 18 infection, were 3.14 (95% CI: 2.07–4.76) and 2.25 (95% CI: 1.49–3.40), respectively. We also found that HPV infection may be associated with squamous cell carcinoma, adenocarcinoma and small cell carcinoma. There is evidence that HPV infection, especially HPV 16 and HPV 18 infection, significantly increase the risk of lung cancer. Future research needs to focus attention toward whether an HPV vaccine can effectively reduce the incidence of lung cancer.
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Affiliation(s)
- Wei-Min Xiong
- Department of Epidemiology and Health Statistics, School of Public Health, Fujian Medical University, Fuzhou, 350108, China.,Fujian Provincial Key Laboratory of Tumor Microbiology, Fujian Medical University, Fuzhou, 350108, China.,Key Laboratory of Ministry of Education for Gastrointestinal Cancer, Fujian Medical University, Fuzhou, 350108, China
| | - Qiu-Ping Xu
- Department of Epidemiology and Health Statistics, School of Public Health, Fujian Medical University, Fuzhou, 350108, China.,Fujian Provincial Key Laboratory of Tumor Microbiology, Fujian Medical University, Fuzhou, 350108, China.,Key Laboratory of Ministry of Education for Gastrointestinal Cancer, Fujian Medical University, Fuzhou, 350108, China
| | - Xu Li
- Department of Thoracic Surgery, The First Affiliated Hospital of Fujian Medical University, Fuzhou, 350001, China
| | - Ren-Dong Xiao
- Department of Thoracic Surgery, The First Affiliated Hospital of Fujian Medical University, Fuzhou, 350001, China
| | - Lin Cai
- Department of Epidemiology and Health Statistics, School of Public Health, Fujian Medical University, Fuzhou, 350108, China.,Fujian Provincial Key Laboratory of Tumor Microbiology, Fujian Medical University, Fuzhou, 350108, China.,Key Laboratory of Ministry of Education for Gastrointestinal Cancer, Fujian Medical University, Fuzhou, 350108, China
| | - Fei He
- Department of Epidemiology and Health Statistics, School of Public Health, Fujian Medical University, Fuzhou, 350108, China.,Fujian Provincial Key Laboratory of Tumor Microbiology, Fujian Medical University, Fuzhou, 350108, China.,Key Laboratory of Ministry of Education for Gastrointestinal Cancer, Fujian Medical University, Fuzhou, 350108, China
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Bae JM, Kim EH. Human papillomavirus infection and risk of lung cancer in never-smokers and women: an 'adaptive' meta-analysis. Epidemiol Health 2015; 37:e2015052. [PMID: 26602770 PMCID: PMC4722221 DOI: 10.4178/epih/e2015052] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2015] [Accepted: 11/17/2015] [Indexed: 12/17/2022] Open
Abstract
OBJECTIVES: The incidence of lung cancer in Koreans is increasing in women and in both men and women with a never-smoking history. Human papillomavirus (HPV) infection has been suggested as a modifiable risk factor of lung cancer in never-smokers and women (LCNSW). This systematic review (SR) aimed to evaluate an association between HPV infection and lung cancer risk in LCNSW. METHODS: Based on a prior SR and some expert reviews, we identified refereed, cited, or related articles using the PubMed and Scopus databases. All case-control studies that reported the odds ratio of HPV infection in LCNSW were selected. An estimate of the summary odds ratio (SOR) with 95% confidence intervals (CI) was calculated. RESULTS: A total of four case-control studies were included. The fixed-effect model was applied because of homogeneity (I-squared=0.0%). The SORs in women and in never-smokers were 5.32 (95% CI, 1.75 to 16.17) and 4.78 (2.25 to 10.15) respectively. CONCLUSIONS: These results showed a significant effect of HPV infection in LCNSW. It is evident that developing a preventive plan against LCNSW may be necessary.
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Affiliation(s)
- Jong-Myon Bae
- Department of Preventive Medicine, Jeju National University School of Medicine, Jeju, Korea
| | - Eun Hee Kim
- Department of Preventive Medicine, Jeju National University School of Medicine, Jeju, Korea
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Yu Y, Liu X, Yang Y, Zhao X, Xue J, Zhang W, Yang A. Effect of FHIT loss and p53 mutation on HPV-infected lung carcinoma development. Oncol Lett 2015; 10:392-398. [PMID: 26171037 DOI: 10.3892/ol.2015.3213] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2014] [Accepted: 04/17/2015] [Indexed: 11/05/2022] Open
Abstract
High-risk human papillomavirus (HPV)16/18 infection in the development of lung cancer has previously been identified, and fragile histidine triad (FHIT) loss and p53 mutation are frequently observed in the disease. However, the association between these factors has not been well studied. The present study aimed to further investigate the significance of HPV infection, FHIT loss and p53 mutations in the development of lung cancer and their possible associations. DNA was extracted from paraffin-embedded specimens from 88 cases of squamous cell carcinoma (SCC), 56 of adenocarcinoma (AC), 36 of small cell lung carcinoma (SCLC) and 110 non-cancer control cases of lung neoplasms. The prevalence of HPV infection was determined by polymerase chain reaction analysis, and FHIT loss and p53 mutations were detected by immunohistochemistry. The χ2, Fisher's exact and Pearson correlation tests were applied for statistical analysis. The results of the present study demonstrated that HPVL1 (the major capsid protein of HPV), HPV16 and HPV18 infection were more prevalent in the lung cancer samples compared with the non-cancer controls (all P<0.001). FHIT loss occurred more frequently in the lung cancer samples (44.44%) compared with the non-cancer controls (7.25%) (P<0.001). FHIT loss in the HPVL1-positive group was significantly increased compared with the HPVL1-negative group in the lung cancer cases and the non-cancer controls (P<0.05). In the lung cancer cases, the p53 mutation rates in the HPVL1- and HPV16/18-positive groups were significantly increased compared with the HPVL1- and HPV16/18-negative groups (P<0.05). In the 180 lung cancer cases, the coexistence rate of FHIT loss and a history of smoking was 38.33% (69/180; Pearson contingency coefficient of r=0.318; P<0.001). FHIT loss and p53 mutation exhibited a synergistic effect on HPV-associated lung cancer (Pearson contingency coefficient r=0.357, P<0.001). The present study demonstrated that FHIT loss may be important in the occurrence of lung cancer, particularly in lung SCCs. FHIT loss may therefore be used as an early indicator for lung cancer, particularly for patients with a history of smoking. HPV infection in lung tumorigenesis may, at least in part, be mediated through FHIT loss. FHIT loss and p53 mutation may coordinate together in the development of HPV-associated lung cancer, and accelerate the occurrence and development of lung cancer.
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Affiliation(s)
- Yan Yu
- Medical School of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Xiaofei Liu
- Medical School of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Yuxuan Yang
- Medical School of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Xiaodan Zhao
- Medical School of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Jianjun Xue
- Department of Nuclear Medicine, The First Affiliated Hospital of Medical School of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Weixiao Zhang
- Department of Nuclear Medicine, The First Affiliated Hospital of Medical School of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Aimin Yang
- Department of Nuclear Medicine, The First Affiliated Hospital of Medical School of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
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11
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Chang NW, Lin KC, Hsu WH, Lee SC, Chan JYH, Wang KY. The effect of gender on health-related quality of life and related factors in post-lobectomy lung-cancer patients. Eur J Oncol Nurs 2014; 19:292-300. [PMID: 25432210 DOI: 10.1016/j.ejon.2014.10.015] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2014] [Revised: 07/29/2014] [Accepted: 10/27/2014] [Indexed: 12/22/2022]
Abstract
PURPOSE While studies have documented gender differences by histologic type among lung cancer patients, the effect of these differences on the health-related quality of life (HRQoL) of post-lobectomy lungcancer patients and related factors remain uncertain. This study examines gender-specific HRQoL and related factors in post-lobectomy lung-cancer patients. METHODS A cross-sectional study design was applied. A convenience sample of 231 post-lobectomy lungcancer patients was recruited from the thoracic surgery outpatient departments of two teaching hospitals in Taipei, Taiwan from March to December 2012. Patients performed a spirometry test and completed instruments that included a Beck Depression Inventory-II, an Interpersonal Support Evaluation List, and the symptom and function scales of the Quality of Life Questionnaire. Data analysis used descriptive statistics, including mean and standard deviations, frequency, and percentage values. Independent-sample Student's t-tests and multivariate analyses were used for comparative purposes. RESULTS This study confirmed a significant gender effect on HRQoL and HRQoL-related factors such as marital status, religious affiliation, smoking status, histologic type, symptoms, pulmonary function, depression, and family support. Moreover, multivariate analysis found gender to be a significant determinant of the HRQoL aspects of physical functioning, emotional functioning, and cognitive functioning. Finally, results indicated that factors other than gender were also significant determinants of HRQoL. CONCLUSION Gender impacts the HRQoL and related factors of postoperative lung-cancer patients. Therefore, gender should be considered in assessing and addressing the individual care needs of these patients in order to attain optimal treatment outcomes.
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Affiliation(s)
- Nai-Wen Chang
- Graduate Institute of Medical Sciences, School of Nursing, National Defense Medical Center, Taipei, Taiwan.
| | - Kuan-Chia Lin
- Graduate Institute of Nurse-Midwifery, National Taipei University of Nursing and Health Sciences, Taipei, Taiwan.
| | - Wen-Hu Hsu
- Department of Surgery, Taipei Veterans Hospital, Taipei, Taiwan.
| | - Shih-Chun Lee
- Division of Thoracic Surgery, Department of Surgery, Tri-Service General Hospital, Taipei, Taiwan.
| | - James Yi-Hsin Chan
- Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei, Taiwan.
| | - Kwua-Yun Wang
- Department of Nursing, Taipei Veterans Hospital, School of Nursing, National Defense Medical Center, Taipei, Taiwan.
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12
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HPV and lung cancer risk: a meta-analysis. J Clin Virol 2014; 63:84-90. [PMID: 25315992 DOI: 10.1016/j.jcv.2014.09.014] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Revised: 09/21/2014] [Accepted: 09/22/2014] [Indexed: 01/14/2023]
Abstract
The potential causal association between human papillomavirus (HPV) and lung cancer (LC) remains controversial. We performed this meta-analysis to evaluate whether HPV infection in lung tissue is associated with LC compared with non-cancer controls. We also quantified this association in different LC subtypes. MEDLINE, EMBASE and Web of Science were searched through March 2014, using the search terms "lung cancer", "human papillomavirus", "HPV" and their combinations. Association was tested using odds ratio (OR) with 95% confidence intervals (95% CI). Heterogeneity was assessed using Q and I(2) statistic. Finally, nine studies, for a total of 1094 LCs and 484 non-cancer controls, were identified as eligible publications. The pooled results showed that HPV infection was associated with LC (OR=5.67, 95% CI: 3.09-10.40, P<0.001). Similar results were also observed in HPV16 and/or HPV18 (HPV16/18) infection analyses (OR=6.02, 95% CI: 3.22-11.28, P<0.001). HPV16/18 was significantly associated with lung squamous cell carcinoma (SCC) (OR=9.78, 95% CI: 6.28-15.22, P<0.001), while the pooled OR was 3.69 in lung adenocarcinoma (95% CI: 0.99-13.71, P=0.052). Our results suggest that lung tissue with HPV infection has a strong association with LC, and especially, HPV16/18 infection significantly increases SCC risk, which indicates a potential pathogenesis link between HPV and LC.
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13
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Hong L, Tang S. Does HPV 16/18 infection affect p53 expression in invasive ductal carcinoma? An experimental study. Pak J Med Sci 2014; 30:789-92. [PMID: 25097518 PMCID: PMC4121699 DOI: 10.12669/pjms.304.4534] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2013] [Revised: 03/11/2014] [Accepted: 03/18/2014] [Indexed: 11/15/2022] Open
Abstract
Objective : To determine the relations between human papilloma viruses type 16 and type 18 infection and the expression of p53 protein in invasive ductal carcinoma. Methods : We detected the expression of HPV 16/18 DNA and p53 protein in invasive ductal carcinoma in 45 cases, breast fibroadenoma in 20 cases and normal breast tissues in 20 cases. HPV detection was performed on paraffin sections using biotin-labeled probes by in situ hybridization and p53 protein expression was evaluated by immunohistochemistry. Results : The expression rate of HPV 16/18 DNA and p53 protein in invasive ductal carcinoma is significantly higher than those in breast fibroadenoma and normal breast tissues (p<0.05); the expression in cases with axillary lymph node metastasis is dramatically higher than those without (p<0.05); the expression of p53 protein increases with TMN staging advance. The expression of HPV16/18 DNA was significantly correlated with the expression of p53 protein (p<0.05). Conclusion : Both HPV16/18 infection and p53 mutation participate the occurrence and progress of invasive ductal carcinoma, and HPV 16/18 infection may be the major factor to cause p53 mutation.
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Affiliation(s)
- Liang Hong
- Liang Hong, MD, Department of General surgery, Tianjin 4th Centre Hospital, Tianjin, 300140, China
| | - Shujie Tang
- Shujie Tang, MD, PhD, Department of Traditional Chinese Medicine, Medical School, Jinan University, Guangzhou, 510632, China
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14
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Ragin C, Obikoya-Malomo M, Kim S, Chen Z, Flores-Obando R, Gibbs D, Koriyama C, Aguayo F, Koshiol J, Caporaso NE, Carpagnano GE, Ciotti M, Dosaka-Akita H, Fukayama M, Goto A, Spandidos DA, Gorgoulis V, Heideman DAM, van Boerdonk RAA, Hiroshima K, Iwakawa R, Kastrinakis NG, Kinoshita I, Akiba S, Landi MT, Eugene Liu H, Wang JL, Mehra R, Khuri FR, Lim WT, Owonikoko TK, Ramalingam S, Sarchianaki E, Syrjanen K, Tsao MS, Sykes J, Hee SW, Yokota J, Zaravinos A, Taioli E. HPV-associated lung cancers: an international pooled analysis. Carcinogenesis 2014; 35:1267-75. [PMID: 24523449 DOI: 10.1093/carcin/bgu038] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Human papillomavirus (HPV) is the etiologic risk factor for cervical cancer. Some studies have suggested an association with a subset of lung tumors, but the etiologic link has not been firmly established. We performed an international pooled analysis of cross-sectional studies (27 datasets, n = 3249 patients) to evaluate HPV DNA prevalence in lung cancer and to investigate viral presence according to clinical and demographic characteristics. HPV16/18 were the most commonly detected, but with substantial variation in viral prevalence between geographic regions. The highest prevalence of HPV16/18 was observed in South and Central America, followed by Asia, North America and Europe (adjusted prevalence rates = 22, 5, 4 and 3%, respectively). Higher HPV16 prevalence was noted in each geographic region compared with HPV18, except in North America. HPV16/18-positive lung cancer was less likely observed among White race (adjusted odds ratio [OR] = 0.33, 95% confidence interval [CI] = 0.12-0.90), whereas no associations were observed with gender, smoking history, age, histology or stage. Comparisons between tumor and normal lung tissue show that HPV was more likely to be present in lung cancer rather than normal lung tissues (OR = 3.86, 95% CI = 2.87-5.19). Among a subset of patients with HPV16-positive tumors, integration was primarily among female patients (93%, 13/14), while the physical status in male cases (N = 14) was inconsistent. Our findings confirm that HPV DNA is present in a small fraction of lung tumors, with large geographic variations. Further comprehensive analysis is needed to assess whether this association reflects a causal relationship.
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Affiliation(s)
- Camille Ragin
- Cancer Prevention and Control Program, Fox Chase Cancer Center, Philadelphia, PA, USA,
| | | | - Sungjin Kim
- Biostatistics & Bioinformatics, Winship Cancer Institute, Emory University, Atlanta, GA, USA
| | - Zhengjia Chen
- Biostatistics & Bioinformatics, Winship Cancer Institute, Emory University, Atlanta, GA, USA
| | - Rafael Flores-Obando
- Department of Cell Biology, State University of New York, Downstate Medical Center, Brooklyn, NY, USA
| | - Denise Gibbs
- Cancer Prevention and Control Program, Fox Chase Cancer Center, Philadelphia, PA, USA
| | - Chihaya Koriyama
- Department of Epidemiology and Preventative Medicine, Kagoshima University, 8-35-1 Sakuragaoka, Kagoshima, Japan
| | - Francisco Aguayo
- Virology Program, Instituto de Ciencias Biomédicas (ICBM), Faculty of Medicine, University of Chile, Santiago, Chile
| | | | - Neil E Caporaso
- Genetic Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD, USA
| | - Giovanna E Carpagnano
- Department of Medical and Surgical Sciences, Faculty of Medicine, University of Foggia, Foggia, Italy
| | - Marco Ciotti
- Laboratory of Molecular Virology, Foundation Polyclinic Tor Vergata, Rome, Italy
| | - Hirotoshi Dosaka-Akita
- Department of Medical Oncology, Hokkaido University, Graduate School of Medicine, North 15, West 7, Kita-ku, Sapporo 060-8638, Japan
| | - Masashi Fukayama
- Department and Cellular and Organ Pathology, Graduate School of Medicine, Akita University, 1-1-1 Hondo, Akita 010-8543, Japan
| | - Akiteru Goto
- Department and Cellular and Organ Pathology, Graduate School of Medicine, Akita University, 1-1-1 Hondo, Akita 010-8543, Japan
| | - Demetrios A Spandidos
- Faculty of Medicine, Laboratory of Clinical Virology, 5D10, University of Crete, Vassilika Voutes, 71110 Heraklion, Crete, Greece
| | - Vassilis Gorgoulis
- Laboratory of Histology & Embryology, School of Medicine, University of Athens, Athens, Greece
| | | | | | - Kenzo Hiroshima
- Department of Pathology, Tokyo Women's Medical University Yachiyo Medical Center, 477-96 Owada-Shinden, Yachiyo-shi, Chiba 276-8524, Japan
| | - Reika Iwakawa
- Division of Multistep Carcinogenesis, National Cancer Center Research Institute, Tsukiji 5-1-1, Chuo-ku, Tokyo 104-0045, Japan
| | - Nikolaos G Kastrinakis
- Laboratory of Histology & Embryology, School of Medicine, University of Athens, Athens, Greece
| | - Ichiro Kinoshita
- Department of Medical Oncology, Hokkaido University, Graduate School of Medicine, North 15, West 7, Kita-ku, Sapporo 060-8638, Japan
| | - Suminori Akiba
- Department of Epidemiology and Preventative Medicine, Kagoshima University, 8-35-1 Sakuragaoka, Kagoshima, Japan
| | - Maria T Landi
- Genetic Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD, USA
| | - H Eugene Liu
- Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Jinn-Li Wang
- Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Ranee Mehra
- Department of Medical Oncology and Developmental Therapeutics Program, Fox Chase Cancer Center, Philadelphia, PA, USA
| | - Fadlo R Khuri
- Department of Hematology and Medical Oncology, Winship Cancer Institute, Emory University School of Medicine, Atlanta, GA, USA
| | - Wan-Teck Lim
- Department of Medical Oncology, National Cancer Center Singapore, 11 Hospital Drive, Singapore 169610, Republic of Singapore
| | - Taofeek K Owonikoko
- Department of Hematology and Medical Oncology, Winship Cancer Institute, Emory University School of Medicine, Atlanta, GA, USA
| | - Suresh Ramalingam
- Department of Hematology and Medical Oncology, Winship Cancer Institute, Emory University School of Medicine, Atlanta, GA, USA
| | - Emmanuela Sarchianaki
- Faculty of Medicine, Laboratory of Clinical Virology, 5D10, University of Crete, Vassilika Voutes, 71110 Heraklion, Crete, Greece
| | - Kari Syrjanen
- Department of Oncology & Radiotherapy, Turku University Hospital, Turku, Finland, Fundação Pio XII- Hospital de Câncer de Barretos, Barretos, Brazil
| | | | - Jenna Sykes
- Department of Biostatistics, University Health Network, Princess Margaret Cancer Centre, Toronto, Ontario M5G2M9, Canada
| | - Siew Wan Hee
- Division of Health Sciences, Warwick Medical School, The University of Warwick, Coventry, UK and
| | - Jun Yokota
- Division of Multistep Carcinogenesis, National Cancer Center Research Institute, Tsukiji 5-1-1, Chuo-ku, Tokyo 104-0045, Japan
| | - Apostolos Zaravinos
- Faculty of Medicine, Laboratory of Clinical Virology, 5D10, University of Crete, Vassilika Voutes, 71110 Heraklion, Crete, Greece
| | - Emanuela Taioli
- Department of Population Health, North Shore Long Island Jewish Health System, Hofstra Medical School, The Feinstein Institute for Medical Research, 350 Community Drive, Manhasset, NY, USA
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15
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Ruttkay-Nedecky B, Jimenez Jimenez AM, Nejdl L, Chudobova D, Gumulec J, Masarik M, Adam V, Kizek R. Relevance of infection with human papillomavirus: the role of the p53 tumor suppressor protein and E6/E7 zinc finger proteins (Review). Int J Oncol 2013; 43:1754-62. [PMID: 24045364 DOI: 10.3892/ijo.2013.2105] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2013] [Accepted: 08/12/2013] [Indexed: 12/13/2022] Open
Abstract
Human papillomaviruses (HPV) are small circular, double-stranded DNA viruses infecting epithelial tissues. HPV types can be classified both as high-risk or low-risk. Of the more than 120 different identified types of HPV, the majority are involved in infections of the genital tract, cancer of the cervix, vulva, vagina and penis, and of non-anogenital localizations, such as the head and neck areas. From the point of view of the infection, human papillomaviruses have developed several molecular mechanisms to enable infected cells to suppress apoptosis. This review provides a comprehensive and critical summary of the current literature that focuses on cervical carcinoma and cancer of the head and neck caused by HPV. In particular, we discuss HPV virology, the molecular mechanisms of carcinogenesis, the role of the tumor suppressor protein p53 and the E6/E7 zinc finger proteins. Classification of HPV according to diagnosis is also described.
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Affiliation(s)
- Branislav Ruttkay-Nedecky
- Department of Chemistry and Biochemistry, Faculty of Agronomy, Mendel University in Brno, CZ-613 00 Brno, Czech Republic
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16
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Jafari H, Gharemohammadlou R, Fakhrjou A, Ebrahimi A, Nejati-Koshki K, Nadri M, Sakhinia E. Genotyping of Human Papillomavirus and TP53 Mutaions at Exons 5 to 7 in Lung Cancer Patients from Iran. BIOIMPACTS : BI 2013; 3:135-40. [PMID: 24163806 DOI: 10.5681/bi.2013.018] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 01/13/2013] [Revised: 03/22/2013] [Accepted: 03/24/2013] [Indexed: 11/17/2022]
Abstract
INTRODUCTION There is a powerful relationship between high-risk human papillomaviruses and lung cancer. In fact, inactivation of p53 is the most common genetic abnormality in lung cancer. Indeed, the frequency of HPV types and TP53 mutations in squamous cell carcinoma of lung, among patients from the northwest of Iran has been evaluated in this article. Methodes: Fifty Paraffin embedded blocks of lung SCC were selected for detection of HPV DNA by Nested PCR, and then DNA was sequenced for HPV typing. Equal numbers of positive and negative samples for the HPV DNA were examined for the presence of mutations in exons 5-7 of the TP53 gene by PCR and direct sequencing. RESULTS Overtly 9 (18%) of 50 samples presented the HPV DNA: eight were HPV-18 and one was HPV-6. TP53 mutations were found in 5 samples (27.7%). Of these, 4 cases showed mutations in exon 5 and one case contained a mutation in exon 7.The most frequent mutation in exon 5 was the C to G transversion (c.409C>G), and also the T to A tansversion (c.770T>A) in exon 7. CONCLUSION This study showed that HPV-18 is more likely to conscequence in the development of lung cancer among some communities. Genetic alterations, alongside with environmental factors, all play a significant role in the pathogenesis of lung cancer.
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Affiliation(s)
- Hossein Jafari
- Department of Medical Genetics, School of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
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