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Salari N, Rasoulpoor S, Shabani S, Mansouri K, Bokaee S, Fatahian R, Farshchian N, Mohammadi M, Hosseinian-Far M. ERCC2 rs13181 Polymorphism Association with Glioma Risk: an Update Meta-Analysis. Indian J Surg Oncol 2023; 14:60-68. [PMID: 36891435 PMCID: PMC9986186 DOI: 10.1007/s13193-022-01623-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Accepted: 08/10/2022] [Indexed: 10/15/2022] Open
Abstract
Glioma is the most common type of primary brain tumour which accounts for about 30% of all brain and central nervous system tumours, and approximately 70% of adult malignant brain tumours. Numerous studies have been performed to assess the relationship between ERCC2 rs13181 polymorphism and the risk of glioma development, yet these findings of these studies are often inconsistent and contradictory. Therefore, the aim of this study is to conduct a systematic review and meta-analysis to assess the role of ERCC2 rs13181 in glioma developing. In this work, we have conducted a systematic review and meta-analysis. In order to collect the results of relevant studies on the association of ERCC2 rs13181 gene polymorphism with glioma, we initially searched the Scopus, Embase, Web of Science (WoS), PubMed, and ScienceDirect databases, without a lower time limit, and until June 2020. In order to analyse the eligible studies, the random effects model was used and the heterogeneity of the studies was investigated with the I 2 index. Data analysis was performed within the Comprehensive Meta-Analysis software (version 2). The total number of studies that focused on patients with glioma was 10. The odds ratio of GG vs TT genotype in patients with glioma based on meta-analysis was 1.08 (0.85-1.37: 95% confidence interval), which indicates the increasing effect of GG vs TT genotype by 0.08. The odds ratio of GG + TG vs TT genotype in patients with glioma was 1.22 (1.38-1.7: 95% confidence interval) based on meta-analysis, which indicates the increasing effect of GG + TG vs TT genotype as 0.22. The odds ratio of TG vs TT genotype in patients with glioma was 1.2 (0.38-1.4: 95% confidence interval), which shows the increasing effect of TG vs TT genotype by 0.2. The odds ratio of G vs T genotype in patients with glioma based on the meta-analysis was 1.15 (1.26-1.4: 95% confidence interval), which indicates the increasing effect of G vs T genotype by 0.15. The odds ratio of GG vs TG + TT genotype in patients with glioma based on meta-analysis was 1.22 (1.33-1.45: 95% confidence interval), which indicates the increasing effect of GG vs TG + TT genotype by 0.22. The results of this systematic review and meta-analysis show that ERCC2 rs13181 polymorphism and its genotypes are an important risk factor for genetic susceptibility to glioma tumour.
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Affiliation(s)
- Nader Salari
- Department of Biostatistics, School of Health, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Shna Rasoulpoor
- Student Research Committee, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Shervin Shabani
- Student Research Committee, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Kamran Mansouri
- Medical Biology Research Centre, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Shadi Bokaee
- Faculty of Health and Life Sciences, School of Life Sciences, Coventry University, Coventry, UK
| | - Reza Fatahian
- Department of Neurosurgery, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Negin Farshchian
- Department of Radiation Oncology, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Masoud Mohammadi
- Cellular and Molecular Research Center, Gerash University of Medical Sciences, Gerash, Iran
| | - Melika Hosseinian-Far
- Department of Food Science & Technology, Faculty of Agriculture, Ferdowsi University of Mashhad (FUM), Mashhad, Iran
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Liu H, Li G, Sturgis EM, Shete S, Dahlstrom KR, Du M, Amos CI, Christiani DC, Lazarus P, Wei Q. Genetic variants in CYP2B6 and HSD17B12 associated with risk of squamous cell carcinoma of the head and neck. Int J Cancer 2022; 151:553-564. [PMID: 35404482 PMCID: PMC9203942 DOI: 10.1002/ijc.34023] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 02/23/2022] [Accepted: 02/28/2022] [Indexed: 11/08/2022]
Abstract
Polycyclic aromatic hydrocarbons (PAH) and tobacco-specific nitrosamines (TSNA) metabolism-related genes play an important role in the development of cancers. We assessed the associations of genetic variants in genes involved in the metabolism of PAHs and TSNA with risk of squamous cell carcinoma of the head and neck (SCCHN) in European populations using two published genome-wide association study datasets. In the single-locus analysis, we identified two SNPs (rs145533669 and rs35246205) in CYP2B6 to be associated with risk of SCCHN (P = 1.57 × 10-4 and .004, respectively), two SNPs (EPHX1 rs117522494 and CYP2B6 rs145533669) to be associated with risk of oropharyngeal cancer (P = .001 and .004, respectively), and one SNP (rs4359199 in HSD17B12) to be associated with risk of oral cancer (P = .006). A significant interaction effect was found between rs4359199 and drinking status on risks of SCCHN and oropharyngeal cancer (P < .05). eQTL and sQTL analyzes revealed that two SNPs (CYP2B6 rs35246205 and HSD17B12 rs4359199) were correlated with alternative splicing or mRNA expression levels of the corresponding genes in liver cells (P < .05 for both). In silico functional annotation suggested that these two SNPs may regulate mRNA expression by affecting the binding of transcription factors. Results from phenome-wide association studies presented significant associations between these genes and risks of other cancers, smoking behavior and alcohol dependence (P < .05). Thus, our study provided some insight into the underlying genetic mechanism of head and neck cancer, which warrants future functional validation.
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Affiliation(s)
- Hongliang Liu
- Duke Cancer Institute, Duke University Medical Center, Durham, NC, USA
- Department of Population Health Sciences, Duke University Medical School, Durham, NC, USA
| | - Guojun Li
- Department of Head and Neck Surgery, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Erich M. Sturgis
- Department of Head and Neck Surgery, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Sanjay Shete
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
- Department of Biostatistics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Kristina R. Dahlstrom
- Department of Biostatistics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Mulong Du
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, 677 Huntington Avenue, Boston, MA, 02115, USA
- Department of Biostatistics, Center for Global Health, School of Public Health, Nanjing Medical University, 101 Longmian Avenue, Nanjing, 211166, Jiangsu, China
| | - Christopher I. Amos
- The Institute for Clinical and Translational Research, Baylor College of Medicine, Houston, 77030, TX, USA
| | - David C. Christiani
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, 677 Huntington Avenue, Boston, MA, 02115, USA
- Department of Medicine, Massachusetts General Hospital, 55 Fruit Street, Boston, MA, 02114, USA
| | - Philip Lazarus
- Department of Pharmaceutical Sciences, College of Pharmacy and Pharmaceutical Sciences, Washington State University, Spokane, WA, 99210, USA
| | - Qingyi Wei
- Duke Cancer Institute, Duke University Medical Center, Durham, NC, USA
- Department of Population Health Sciences, Duke University Medical School, Durham, NC, USA
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Latimer JJ, Alhamed A, Sveiven S, Almutairy A, Klimas NG, Abreu M, Sullivan K, Grant SG. Preliminary Evidence for a Hormetic Effect on DNA Nucleotide Excision Repair in Veterans with Gulf War Illness. Mil Med 2021; 185:e47-e52. [PMID: 31334811 PMCID: PMC7353836 DOI: 10.1093/milmed/usz177] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 06/17/2019] [Accepted: 06/25/2019] [Indexed: 12/13/2022] Open
Abstract
Introduction Veterans of the 1991 Gulf War were potentially exposed to a mixture of stress, chemicals and radiation that may have contributed to the persistent symptoms of Gulf War Illness (GWI). The genotoxic effects of some of these exposures are mediated by the DNA nucleotide excision repair (NER) pathway. We hypothesized that individuals with relatively low DNA repair capacity would suffer greater damage from cumulative genotoxic exposures, some of which would persist, causing ongoing problems. Materials and Methods Blood samples were obtained from symptomatic Gulf War veterans and age-matched controls. The unscheduled DNA synthesis assay, a functional measurement of NER capacity, was performed on cultured lymphocytes, and lymphocyte mRNA was extracted and analyzed by sequencing. Results Despite our hypothesis that GWI would be associated with DNA repair deficiency, NER capacity in lymphocytes from affected GWI veterans actually exhibited a significantly elevated level of DNA repair (p = 0.016). Both total gene expression and NER gene expression successfully differentiated individuals with GWI from unaffected controls. The observed functional increase in DNA repair capacity was accompanied by an overexpression of genes in the NER pathway, as determined by RNA sequencing analysis. Conclusion We suggest that the observed elevations in DNA repair capacity and NER gene expression are indicative of a “hormetic,” i.e., induced or adaptive protective response to battlefield exposures. Normally such effects are short-term, but in these individuals this response has resulted in a long-term metabolic shift that may also be responsible for the persistent symptoms of GWI.
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Affiliation(s)
- Jean J Latimer
- Department of Pharmaceutical Sciences, Nova Southeastern University, 3200 South University Drive, Fort Lauderdale, FL 33328.,South University Drive, AutoNation Institute for Breast Cancer Research, 3321, Fort Lauderdale, FL 33328
| | - Abdullah Alhamed
- Department of Pharmaceutical Sciences, Nova Southeastern University, 3200 South University Drive, Fort Lauderdale, FL 33328.,South University Drive, AutoNation Institute for Breast Cancer Research, 3321, Fort Lauderdale, FL 33328
| | - Stefanie Sveiven
- South University Drive, AutoNation Institute for Breast Cancer Research, 3321, Fort Lauderdale, FL 33328
| | - Ali Almutairy
- Department of Pharmaceutical Sciences, Nova Southeastern University, 3200 South University Drive, Fort Lauderdale, FL 33328.,South University Drive, AutoNation Institute for Breast Cancer Research, 3321, Fort Lauderdale, FL 33328
| | - Nancy G Klimas
- Department of Clinical Immunology, Nova Southeastern University, 3200 South University Drive, Fort Lauderdale, FL 33328.,Department of Medicine, Miami VA Healthcare System, 1201 NW 16th St, Miami, FL 33313
| | - Maria Abreu
- Department of Clinical Immunology, Nova Southeastern University, 3200 South University Drive, Fort Lauderdale, FL 33328
| | - Kimberly Sullivan
- Department of Environmental Health, Boston University School of Public Health, 715 Albany St, Boston, MA 02118
| | - Stephen G Grant
- South University Drive, AutoNation Institute for Breast Cancer Research, 3321, Fort Lauderdale, FL 33328.,Department of Public Health, Nova Southeastern University, 3200 South University Drive, Fort Lauderdale, FL 33328
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Lakkireddy S, Aula S, Kapley A, Gundeti S, Kutala VK, Jamil K. Association of DNA repair gene XPC Ala499Val (rs2228000 C>T) and Lys939Gln (rs2228001 A>C) polymorphisms with the risk of chronic myeloid leukemia: A case-control study in a South Indian population. J Gene Med 2021; 23:e3339. [PMID: 33829606 DOI: 10.1002/jgm.3339] [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: 05/10/2020] [Revised: 02/27/2021] [Accepted: 03/30/2021] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Xeroderma pigmentosum complementation group C (XPC), a DNA repair protein, plays an important role in the maintenance of genomic integrity and is essential for the nucleotide excision repair pathway. Polymorphisms in the XPC gene may alter DNA repair leading to genetic instability and oncogenesis. The present study aimed to assess the relationship between the XPC Ala499Val (rs2228000 C>T) and Lys939Gln (rs2228001 A>C) non-synonymous polymorphisms and susceptibility to chronic myeloid leukemia (CML) pathogenesis, disease progression and the response to targeted therapeutic regimen, imatinib mesylate. METHODS This case-control study included 212 cases and 212 controls, and the genotypes were determined by polymerase chain reaction-restriction fragment length polymorphism assays. RESULTS Our results showed significant association of variant CT (odds ratio = 1.92, 95% confidence interval = 1.21-3.06, p = 0.003) and TT (odds ratio = 2.84, 95% confidence interval = 1.22-6.71, p = 0.007) genotypes in patients with the XPC Ala499Val polymorphism and CML risk. In addition, these genotypes were associated with CML progression to advanced phases (p = 0.006), splenomegaly (p = 0.017) and abnormal lactate dehydrogenase levels (p = 0.03). XPC Lys939Gln was found to correlate with a poor response to therapy, showing borderline significant association with minor cytogenetic response (p = 0.08) and a poor molecular response (p = 0.06). Significant association of the Ala499Val and Lys939Gln polymorphisms with prognosis was observed (Hasford high risk, p = 0.031 and p = 0.019, respectively). Haplotype analysis showed a strong correlation of variant TC haplotype with poor therapy responses (minor cytogenetic response, p = 0.019; poor molecular response, p < 0.0001). CONCLUSIONS In conclusion, our results suggest that XPC Ala499Val is a high-penetrance CML susceptibility polymorphism. Both polymorphisms studied are considered as genetic markers with respect to assessing disease progression, therapy response and prognosis in CML patients.
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Affiliation(s)
- Samyuktha Lakkireddy
- Centre for Biotechnology and Bioinformatics, School of Life Sciences, Jawaharlal Nehru Institute of Advanced Studies (JNIAS), Hyderabad, Telangana, India.,Department of Biotechnology, Jawaharlal Nehru Technological University Anantapur (JNTUA), Ananthapuramu, Andhra Pradesh, India
| | - Sangeetha Aula
- Centre for Biotechnology and Bioinformatics, School of Life Sciences, Jawaharlal Nehru Institute of Advanced Studies (JNIAS), Hyderabad, Telangana, India.,Department of Biotechnology, Jawaharlal Nehru Technological University Anantapur (JNTUA), Ananthapuramu, Andhra Pradesh, India
| | - Atya Kapley
- Centre for Biotechnology and Bioinformatics, School of Life Sciences, Jawaharlal Nehru Institute of Advanced Studies (JNIAS), Hyderabad, Telangana, India.,Environmental Genomics Division, Council of Scientific and Industrial Research-National Environmental Engineering Research Institute (CSIR-NEERI), Nagpur, Maharashtra, India
| | - Sadashivudu Gundeti
- Department of Medical Oncology, Nizam's Institute of Medical Sciences (NIMS), Hyderabad, Telangana, India
| | - Vijay Kumar Kutala
- Department of Clinical Pharmacology & Therapeutics, Nizam's Institute of Medical Sciences (NIMS), Hyderabad, Telangana, India
| | - Kaiser Jamil
- Centre for Biotechnology and Bioinformatics, School of Life Sciences, Jawaharlal Nehru Institute of Advanced Studies (JNIAS), Hyderabad, Telangana, India.,Department of Biotechnology, Jawaharlal Nehru Technological University Hyderabad (JNTUH), Hyderabad, Telangana, India
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Rehman MYA, Taqi MM, Hussain I, Nasir J, Rizvi SHH, Syed JH. Elevated exposure to polycyclic aromatic hydrocarbons (PAHs) may trigger cancers in Pakistan: an environmental, occupational, and genetic perspective. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:42405-42423. [PMID: 32875453 DOI: 10.1007/s11356-020-09088-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Accepted: 04/27/2020] [Indexed: 05/22/2023]
Abstract
Polycyclic aromatic hydrocarbons (PAHs) are carcinogenic compounds which are emitted through incomplete combustion of organic materials, fossil fuels, consumption of processed meat, smoked food, and from various industrial activities. High molecular mass and mobility make PAHs widespread and lethal for human health. A cellular system in human detoxifies these toxicants through specialized enzymatic machinery called xenobiotic-metabolizing (CYP450) and phase-II (GSTs) enzymes (XMEs). These metabolizing enzymes include cytochromes P450 family (CYP1, CYP2), glutathione s-transferases, and ALDHs. Gene polymorphisms in XMEs encoding genes can compromise their metabolizing capacity to detoxify ingested carcinogens (PAHs etc.) that may lead to prolong and elevated exposure to ingested toxicants and may consequently lead to cancer. Moreover, PAHs can induce cancer through reprograming XMEs' gene functions by altering their epigenetic markers. This review article discusses possible interplay between individual's gene polymorphism in XMEs' genes, their altered epigenetic markers, and exposure to PAHs in cancer susceptibility in Pakistan.
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Affiliation(s)
- Muhammad Yasir Abdur Rehman
- Environmental Biology and Ecotoxicology Laboratory, Department of Environmental Sciences, Faculty of Biological Sciences, Quaid-I-Azam University, Islamabad, PO, 45320, Pakistan
| | | | - Imran Hussain
- Department of Biotechnology, Faculty of Biological Sciences, Quaid-I-Azam University, Islamabad, PO, 45320, Pakistan
- Business Unit Environmental Resources and Technologies, Center for Energy, Austrian Institute of Technology (AIT), Vienna, Austria
| | - Jawad Nasir
- Earth Sciences Directorate, Pakistan Space and Upper Atmosphere Research Commission (SUPARCO), P.O. Box 8402, Karachi, 75270, Pakistan
| | - Syed Hussain Haider Rizvi
- Earth Sciences Directorate, Pakistan Space and Upper Atmosphere Research Commission (SUPARCO), P.O. Box 8402, Karachi, 75270, Pakistan
| | - Jabir Hussain Syed
- Department of Meteorology, COMSATS University Islamabad, Park Road, Tarlai Kalan, Islamabad, 45550, Pakistan.
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Wang Y, Li J, Shen C, Wu Y, Che G. Clinical Role of Excision Repair Cross-Complementing 1 Gene Expression in Resected Esophageal Squamous Cell Carcinoma: A Meta-Analysis. Dig Dis Sci 2020; 65:2264-2271. [PMID: 31713119 DOI: 10.1007/s10620-019-05941-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Accepted: 11/05/2019] [Indexed: 02/08/2023]
Abstract
AIMS To explore the relationship between excision repair cross-complementing 1 (ERCC1) gene expression and clinical pathological parameters and prognosis of esophageal squamous cell carcinoma (ESCC) patients who received the surgical therapy. METHODS To identify relevant articles, a systematic literature retrieval was conducted in several databases, including the Embase, Web of Science, Cochrane Library, PubMed, VIP, Wanfang, and CNKI. The association of ERCC1 gene expression with clinicopathological characteristics and survival was assessed by the pooled relative risk (RR) and hazard ratio (HR) with the corresponding 95% confidence interval (CI), respectively. Sensitivity analysis was conducted to assess the stability of pooled results. Begg's funnel plot and Egger's test were applied to detect potential publication bias. RESULTS A total of nine studies involving 746 patients were included in our meta-analysis, and all patients were from Asian countries, including China, Korea, and Japan. The results indicated that ERCC1 gene expression was significantly associated with lymph node metastasis (RR = 1.30, 95% CI 1.11-1.53; P = 0.002), higher TNM stage (RR = 1.23, 95% CI 1.06-1.43; P = 0.006), worse overall survival (HR = 2.40, 95% CI 1.32-4.37; P < 0.001), and disease-free survival (HR = 1.67, 95% CI 1.15-2.41; P = 0.007). Sensitivity analysis manifested that the pooled results were stable and no significant publication bias was observed. CONCLUSIONS ERCC1 gene expression is significantly related to tumor stage and prognosis in resected ESCC patients from Asian countries. More prospective studies with larger samples are needed to testify our findings.
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Affiliation(s)
- Yan Wang
- Department of Thoracic Surgery, West China Hospital, Sichuan University, Guoxuexiang No. 37, Chengdu, 610041, China
| | - Jialong Li
- Department of Thoracic Surgery, West China Hospital, Sichuan University, Guoxuexiang No. 37, Chengdu, 610041, China
| | - Cheng Shen
- Department of Thoracic Surgery, West China Hospital, Sichuan University, Guoxuexiang No. 37, Chengdu, 610041, China
| | - Yanming Wu
- Department of Thoracic Surgery, West China Hospital, Sichuan University, Guoxuexiang No. 37, Chengdu, 610041, China
| | - Guowei Che
- Department of Thoracic Surgery, West China Hospital, Sichuan University, Guoxuexiang No. 37, Chengdu, 610041, China.
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Shete S, Liu H, Wang J, Yu R, Sturgis EM, Li G, Dahlstrom KR, Liu Z, Amos CI, Wei Q. A Genome-Wide Association Study Identifies Two Novel Susceptible Regions for Squamous Cell Carcinoma of the Head and Neck. Cancer Res 2020; 80:2451-2460. [PMID: 32276964 PMCID: PMC7299763 DOI: 10.1158/0008-5472.can-19-2360] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 02/06/2020] [Accepted: 04/07/2020] [Indexed: 12/13/2022]
Abstract
To identify genetic variants for risk of squamous cell carcinoma of the head and neck (SCCHN), we conducted a two-phase genome-wide association study consisting of 7,858,089 SNPs in 2,171 cases and 4,493 controls of non-Hispanic white, of which, 434,839 typed and 7,423,250 imputed SNPs were used as the discovery. SNPs with P < 1 × 10-3 were further validated in the OncoArray study of oral and pharynx cancer (5,205 cases and 3,232 controls of European ancestry) from databases of Genotypes and Phenotypes. Meta-analysis of the discovery and replication studies identified one novel locus 6p22.1 (P = 2.96 × 10-9 for the leading rs259919) and two cancer susceptibility loci 6p21.32 (rs3135001, HLA-DQB1) and 6p21.33 (rs1265081, CCHCR1) associated with SCCHN risk. Further stratification by tumor site revealed four known cancer loci (5p15.33, 6p21.32, 6p21.33, and 2p23.1) associated with oral cavity cancer risk and oropharyngeal cancer risk, respectively. In addition, one novel locus 18q22.2 (P = 2.54 × 10-9 for the leading SNP rs142021700) was identified for hypopharynx and larynx cancer risk. For SNPs in those reported or novel loci, we also performed functional annotations by bioinformatics prediction and expression quantitative trait loci analysis. Collectively, our identification of four reported loci (2p23.1, 5p15.33, 6p21.32, and 6p21.33) and two novel loci (6p22.1 and 18q22.2) for SCCHN risk highlight the importance of human leukocyte antigen loci for oropharyngeal cancer risk, suggesting that immunologic mechanisms are implicated in the etiology of this subset of SCCHN. SIGNIFICANCE: Two novel risk loci for SCCHN in non-Hispanic white individuals highlight the importance of immunologic mechanism in the disease etiology.
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Affiliation(s)
- Sanjay Shete
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, Texas.
- Department of Biostatistics, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Hongliang Liu
- Duke Cancer Institute, Duke University Medical Center, Durham, North Carolina
- Department of Medicine, Duke University School of Medicine, Durham, North Carolina
| | - Jian Wang
- Department of Biostatistics, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Robert Yu
- Department of Biostatistics, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Erich M Sturgis
- Department of Head and Neck Surgery, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Guojun Li
- Department of Head and Neck Surgery, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Kristina R Dahlstrom
- Department of Head and Neck Surgery, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Zhensheng Liu
- Duke Cancer Institute, Duke University Medical Center, Durham, North Carolina
- Department of Medicine, Duke University School of Medicine, Durham, North Carolina
| | - Christopher I Amos
- The Institute for Clinical and Translational Research, Baylor College of Medicine, Houston, Texas
| | - Qingyi Wei
- Duke Cancer Institute, Duke University Medical Center, Durham, North Carolina.
- Department of Medicine, Duke University School of Medicine, Durham, North Carolina
- Department of Population Health Sciences, Duke University Medical School, Durham, North Carolina
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Moynihan M, Sullivan T, Provenzano K, Rieger-Christ K. Urinary Microbiome Evaluation in Patients Presenting with Hematuria with a Focus on Exposure to Tobacco Smoke. Res Rep Urol 2019; 11:359-367. [PMID: 31921713 PMCID: PMC6938191 DOI: 10.2147/rru.s233386] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Accepted: 12/11/2019] [Indexed: 12/12/2022] Open
Abstract
PURPOSE To better characterize the urinary microbiome in males and contribute to overall understanding of the urinary microbiota specifically in patients undergoing evaluation for possible bladder cancer, stratified by risk exposure to smoking. PATIENTS AND METHODS Recruitment of 43 male patients in a sequential manner presenting for hematuria evaluation to a single institution was undertaken. Mid-stream urine specimen pellets were processed through a DNA isolation protocol before undergoing PCR amplification, purification, and 16S rRNA gene sequencing. Gene sequences were clustered into operational taxonomic units and statistical analysis was performed to determine specimen diversity and phylogenetic trends. RESULTS No significant difference in microbial diversity was found between the specimens. On subgroup analysis, no significant difference was observed when stratified by either tobacco smoking history or by newly diagnosed urothelial bladder cancer. Variation in microbial diversity was seen amongst all analyzed specimens. CONCLUSION The results of our analysis of carefully selected subjects help to better characterize the urinary microbiome in males and supplements the limited available information on the interrelationship between the urinary microbiome and development of genitourinary malignancy. No significant difference was observed in our small sample size when stratified by tobacco exposure or newly diagnosed bladder cancer.
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Affiliation(s)
- Matthew Moynihan
- Department of Surgery, Division of Urology, Lahey Hospital & Medical Center, Burlington, MA01805, USA
| | - Travis Sullivan
- Cell and Molecular Biology Laboratory, Lahey Hospital & Medical Center, Burlington, MA01805, USA
| | | | - Kimberly Rieger-Christ
- Cell and Molecular Biology Laboratory, Lahey Hospital & Medical Center, Burlington, MA01805, USA
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Peterson LA, Ignatovich IV, Grill AE, Beauchamp A, Ho YY, DiLernia AS, Zhang L. Individual Differences in the Response of Human β-Lymphoblastoid Cells to the Cytotoxic, Mutagenic, and DNA-Damaging Effects of a DNA Methylating Agent, N-Methylnitrosourethane. Chem Res Toxicol 2019; 32:2214-2226. [PMID: 31589032 DOI: 10.1021/acs.chemrestox.9b00266] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Metabolic activation of many carcinogens leads to formation of reactive intermediates that form DNA adducts. These adducts are cytotoxic when they interfere with cell division. They can also cause mutations by miscoding during DNA replication. Therefore, an individual's risk of developing cancer will depend on the balance between these processes as well as their ability to repair the DNA damage. Our hypothesis is that variations of genes participating in DNA damage repair and response pathways play significant roles in an individual's risk of developing tobacco-related cancers. To test this hypothesis, 61 human B-lymphocyte cell lines from the International HapMap project were phenotyped for their sensitivity to the cytotoxic and genotoxic properties of a model methylating agent, N-nitroso-N-methylurethane (NMUr). Cell viability was measured using a luciferase-based assay. Repair of the mutagenic and toxic DNA adduct, O6-methylguanine (O6-mG), was monitored by LC-MS/MS analysis. Genotoxic potential of NMUr was assessed employing a flow-cytometry based in vitro mutagenesis assay in the phosphatidylinositol-glycan biosynthesis class-A (PIG-A) gene. A wide distribution of responses to NMUr was observed with no correlation to gender or ethnicity. While the rate of O6-mG repair partially influenced the toxicity of NMUr, it did not appear to be the major factor affecting individual susceptibility to the mutagenic effects of NMUr. Genome-wide analysis identified several novel single nucleotide polymorphisms to be explored in future functional validation studies for a number of the toxicological end points.
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Hou Y, Zhang B, Miao L, Ji Y, Yu Y, Zhu L, Ma H, Yuan H. Association of long non‐coding RNA MEG3 polymorphisms with oral squamous cell carcinoma risk. Oral Dis 2019; 25:1318-1324. [DOI: 10.1111/odi.13103] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Revised: 03/09/2019] [Accepted: 03/30/2019] [Indexed: 01/02/2023]
Affiliation(s)
- Yunwen Hou
- Jiangsu Key Laboratory of Oral Diseases Nanjing Medical University Nanjing China
| | - Bo Zhang
- Department of Oral and Maxillofacial Surgery, Affiliated Hospital of Stomatology Nanjing Medical University Nanjing China
| | - Limin Miao
- Jiangsu Key Laboratory of Oral Diseases Nanjing Medical University Nanjing China
| | - Yefeng Ji
- Jiangsu Key Laboratory of Oral Diseases Nanjing Medical University Nanjing China
| | - Yang Yu
- Jiangsu Key Laboratory of Oral Diseases Nanjing Medical University Nanjing China
| | - Longbiao Zhu
- Jiangsu Key Laboratory of Oral Diseases Nanjing Medical University Nanjing China
- Department of Epidemiology and Biostatistics, Jiangsu Key Laboratory of Cancer Biomarkers, Prevention and Treatment, Cancer Center, School of Public Health Nanjing Medical University Nanjing China
| | - Hongxia Ma
- Department of Epidemiology and Biostatistics, Jiangsu Key Laboratory of Cancer Biomarkers, Prevention and Treatment, Cancer Center, School of Public Health Nanjing Medical University Nanjing China
| | - Hua Yuan
- Jiangsu Key Laboratory of Oral Diseases Nanjing Medical University Nanjing China
- Department of Oral and Maxillofacial Surgery, Affiliated Hospital of Stomatology Nanjing Medical University Nanjing China
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Boldrin E, Malacrida S, Rumiato E, Battaglia G, Ruol A, Amadori A, Saggioro D. Association Between ERCC1 rs3212986 and ERCC2/XPD rs1799793 and OS in Patients With Advanced Esophageal Cancer. Front Oncol 2019; 9:85. [PMID: 30847299 PMCID: PMC6393335 DOI: 10.3389/fonc.2019.00085] [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: 12/03/2018] [Accepted: 01/29/2019] [Indexed: 12/15/2022] Open
Abstract
Esophageal cancer (EC) is a very aggressive tumor, and no reliable prognostic markers exist especially for resectable advanced neoplasia. The principal aim of this study was to investigate the association of germline polymorphisms in nucleotide excision repair (NER) pathway genes with the overall survival (OS) of patients with advanced EC. As a second aim, we also studied the association of NER gene variants with response to cisplatin-based chemotherapy. Among the EC patients referred to our Institution between 2004 and 2012, we selected a cohort of 180 patients diagnosed with a clinical tumor stage ranging from IIB and IVA. Patients were genotyped for four NER variants, two in the ERCC1 (rs11615 and rs3212986) and two in the ERCC2/XPD (rs1799793 and rs13181) genes. Kaplan–Meier analyses and Cox proportional hazards model were used to evaluate the associations of the selected variants with OS; association with response to neoadjuvant therapy was investigated using logistic regression. Results showed that the ERCC1 rs3212986 and the ERCC2/XPD rs1799793 were significantly associated with shorter OS. On the contrary, response association analysis displayed that, while rs11615 and rs3212986 in ERCC1 were associated with response, both ERCC2/XPD variants were not. By creating survival prediction models, we showed that the rs3212986 and the rs1799793 have a better predictability of the tumor stage alone. Furthermore, they were able to improve the power of the clinical model (AUC = 0.660 vs. AUC = 0.548, p = 0.004). In conclusion, our results indicate that the ERCC1 rs3212986 and the ERCC2/XPD rs1799793 could be used as surrogate markers for a better stratification of EC patients with advanced resectable tumor.
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Affiliation(s)
- Elisa Boldrin
- Immunology and Molecular Oncology, Veneto Institute of Oncology IOV-IRCCS, Padova, Italy
| | - Sandro Malacrida
- Eurac Research, Institute of Mountain Emergency Medicine, Bolzano, Italy
| | - Enrica Rumiato
- Immunology and Molecular Oncology, Veneto Institute of Oncology IOV-IRCCS, Padova, Italy
| | - Giorgio Battaglia
- Endoscopy Unit, Veneto Institute of Oncology IOV-IRCCS, Padova, Italy
| | - Alberto Ruol
- Department of Surgical Sciences, Oncology and Gastroenterology, University of Padova, Padova, Italy
| | - Alberto Amadori
- Immunology and Molecular Oncology, Veneto Institute of Oncology IOV-IRCCS, Padova, Italy.,Department of Surgical Sciences, Oncology and Gastroenterology, University of Padova, Padova, Italy
| | - Daniela Saggioro
- Immunology and Molecular Oncology, Veneto Institute of Oncology IOV-IRCCS, Padova, Italy
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Predictive Value of Two Polymorphisms of ERCC2, rs13181 and rs1799793, in Clinical Outcomes of Chemotherapy in Gastric Cancer Patients: A Meta-Analysis. DISEASE MARKERS 2018; 2018:3947626. [PMID: 30581498 PMCID: PMC6276480 DOI: 10.1155/2018/3947626] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Revised: 09/04/2018] [Accepted: 09/09/2018] [Indexed: 01/08/2023]
Abstract
Background Several researchers have investigated the relationship between ERCC2 rs13181 and rs1799793 polymorphisms and chemotherapy efficacy in terms of tumour response and prognosis in gastric patients. However, the published data have shown inconsistencies. Methods PubMed, Elsevier, and Chinese National Knowledge Infrastructure databases were searched for relevant articles published before August 1, 2017. Thirteen studies including 3096 gastric cancer patients treated with chemotherapy were included. Results For rs1799793, in the overall analyses, no relationships were found between four genetic models and clinical response (AA vs. GG: OR = 1.17, 95% CI, 0.70–1.95; GA vs. GG: OR = 0.94, 95% CI, 0.69–1.27; GA + AA vs. GG: OR = 1.12, 95% CI, 0.85–1.46; and AA vs. GG + GA: OR = 1.24, 95% CI, 0.81–1.92). In stratified analyses, the results remained negative. We also found no relationship between each of the genetic models and overall survival time in the overall analyses. In the stratified analyses, for Asians, the A carrier genotype might be more closely associated with shorter survival time and higher risk of death for patients than the GG genotype (AA vs. GG: HR = 1.77, 95% CI, 1.20–2.6; GA + AA vs. GG: HR = 1.62, 95% CI, 1.26–2.09), but the results were negative for Caucasians. No significant relationships were found between the rs13181 polymorphism and OR or OS. Conclusions This meta-analysis suggested that the ERCC2 rs1799793 polymorphism might be a predictor of prognosis in gastric cancer patients subjected to platinum-based chemotherapy.
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13
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Allione A, Pardini B, Viberti C, Oderda M, Allasia M, Gontero P, Vineis P, Sacerdote C, Matullo G. The prognostic value of basal DNA damage level in peripheral blood lymphocytes of patients affected by bladder cancer. Urol Oncol 2018; 36:241.e15-241.e23. [DOI: 10.1016/j.urolonc.2018.01.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Revised: 01/04/2018] [Accepted: 01/09/2018] [Indexed: 10/18/2022]
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Gao D, Herman JG, Guo M. The clinical value of aberrant epigenetic changes of DNA damage repair genes in human cancer. Oncotarget 2018; 7:37331-37346. [PMID: 26967246 PMCID: PMC5095080 DOI: 10.18632/oncotarget.7949] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2015] [Accepted: 02/20/2016] [Indexed: 12/22/2022] Open
Abstract
The stability and integrity of the human genome are maintained by the DNA damage repair (DDR) system. Unrepaired DNA damage is a major source of potentially mutagenic lesions that drive carcinogenesis. In addition to gene mutation, DNA methylation occurs more frequently in DDR genes in human cancer. Thus, DNA methylation may play more important roles in DNA damage repair genes to drive carcinogenesis. Aberrant methylation patterns in DNA damage repair genes may serve as predictive, diagnostic, prognostic and chemosensitive markers of human cancer. MGMT methylation is a marker for poor prognosis in human glioma, while, MGMT methylation is a sensitive marker of glioma cells to alkylating agents. Aberrant epigenetic changes in DNA damage repair genes may serve as therapeutic targets. Treatment of MLH1-methylated colon cancer cell lines with the demethylating agent 5′-aza-2′-deoxycytidine induces the expression of MLH1 and sensitizes cancer cells to 5-fluorouracil. Synthetic lethality is a more exciting approach in patients with DDR defects. PARP inhibitors are the most effective anticancer reagents in BRCA-deficient cancer cells.
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Affiliation(s)
- Dan Gao
- Department of Gastroenterology and Hepatology, Chinese PLA General Hospital, Beijing, China.,Medical College of NanKai University, Tianjin, China
| | - James G Herman
- The Hillman Cancer Center, University of Pittsburgh Cancer Institute, Pittsburgh, PA, USA
| | - Mingzhou Guo
- Department of Gastroenterology and Hepatology, Chinese PLA General Hospital, Beijing, China
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Bahl C, Singh N, Behera D, Sharma S. High-order gene interactions between the genetic polymorphisms in Wnt and AhR pathway in modulating lung cancer susceptibility. Per Med 2017; 14:487-502. [PMID: 29749862 DOI: 10.2217/pme-2017-0018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
AIM Genetic variations present within Wnt and AhR pathway might be related to the lung cancer susceptibility. METHODS A total of 555 subjects were genotyped using PCR-RFLP technique for polymorphic sites in DKK4, DKK3, DKK2, sFRP3, sFRP4, Axin2 and AhR. Multifactor dimensionality reduction method and classification and regression tree analysis was used. RESULTS Overall sFRP4rs1802073 which has a cross validation consistency of 10/10, prediction error = 0.43 (p > 0.0001) is the best factor model. The second best model was sFRP4rs1802073 and DKK2rs419558 with cross validation consistency of 9/10 and prediction error = 0.40. In classification and regression tree analysis, DKK2 rs419558 came out to be a significant factor; DKK2rs17037102 (M)/DKK2rs419558 (M) showed a tenfold risk of acquiring lung cancer, p = 0.0001. DKK2rs17037102 (M)/AhRrs2066853 (W)/AhRrs10250822 (M) showed an 11-fold risk of developing lung cancer, p = 0.00001. CONCLUSION Both DKK2 and sFRP4 polymorphisms are found to play a crucial role; especially for smokers towards modulating risk for lung cancer. AhR variants are contributing maximally toward lung cancer risk.
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Affiliation(s)
- Charu Bahl
- Department of Biotechnology, Thapar University, Patiala, Punjab 147002, India
| | - Navneet Singh
- Department of Pulmonary Medicine, Post-Graduate Institute of Education & Medical Research (PGIMER), Sector 14, Chandigarh, India
| | - Digambar Behera
- Department of Pulmonary Medicine, Post-Graduate Institute of Education & Medical Research (PGIMER), Sector 14, Chandigarh, India
| | - Siddharth Sharma
- Department of Biotechnology, Thapar University, Patiala, Punjab 147002, India
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Electronic cigarette aerosols suppress cellular antioxidant defenses and induce significant oxidative DNA damage. PLoS One 2017; 12:e0177780. [PMID: 28542301 PMCID: PMC5436899 DOI: 10.1371/journal.pone.0177780] [Citation(s) in RCA: 106] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Accepted: 05/03/2017] [Indexed: 01/30/2023] Open
Abstract
Background Electronic cigarette (EC) aerosols contain unique compounds in addition to toxicants and carcinogens traditionally found in tobacco smoke. Studies are warranted to understand the public health risks of ECs. Objective The aim of this study was to determine the genotoxicity and the mechanisms induced by EC aerosol extracts on human oral and lung epithelial cells. Methods Cells were exposed to EC aerosol or mainstream smoke extracts and DNA damage was measured using the primer anchored DNA damage detection assay (q-PADDA) and 8-oxo-dG ELISA assay. Cell viability, reactive oxygen species (ROS) and total antioxidant capacity (TAC) were measured using standard methods. mRNA and protein expression were evaluated by RT-PCR and western blot, respectively. Results EC aerosol extracts induced DNA damage in a dose-dependent manner, but independently of nicotine concentration. Overall, EC aerosol extracts induced significantly less DNA damage than mainstream smoke extracts, as measured by q-PADDA. However, the levels of oxidative DNA damage, as indicated by the presence of 8-oxo-dG, a highly mutagenic DNA lesion, were similar or slightly higher after exposure to EC aerosol compared to mainstream smoke extracts. Mechanistically, while exposure to EC extracts significantly increased ROS, it decreased TAC as well as the expression of 8-oxoguanine DNA glycosylase (OGG1), an enzyme essential for the removal of oxidative DNA damage. Conclusions Exposure to EC aerosol extracts suppressed the cellular antioxidant defenses and led to significant DNA damage. These findings emphasize the urgent need to investigate the potential long-term cancer risk of exposure to EC aerosol for vapers and the general public.
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Qian T, Zhang B, Qian C, He Y, Li Y. Association between common polymorphisms in ERCC gene and glioma risk: A meta-analysis of 15 studies. Medicine (Baltimore) 2017; 96:e6832. [PMID: 28514298 PMCID: PMC5440135 DOI: 10.1097/md.0000000000006832] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND A number of studies have investigated the roles of excision repair cross complementation group 1 (ERCC1), ERCC2, and ERCC5 genes polymorphisms in the development of glioma; however, the results were inconsistent. Here, we performed a meta-analysis to investigate the association between 6 polymorphisms in the ERCC genes (rs3212986, rs11615, rs13181, rs1799793, rs238406, rs17655) and glioma risk. METHODS The PubMed, Embase, and Web of science were searched up to September 6, 2016, for studies on the association between ERCC polymorphisms and glioma risk. A fixed-effects or random-effects model was used to calculate the pooled odds ratios based on the results from the heterogeneity tests. Sensitivity and cumulative meta-analyses were also performed. RESULTS A total of 15 studies were eligible for the pooled analysis, conducted in 2 populations of ethnic descent: 8 Europeans and 7 Asians. The results showed that ERCC1 rs3212986 polymorphism was positively associated with glioma [AA vs CC: odds ratio (OR) = 1.298, 95% confidence interval (95% CI) = 1.043-1.230, P = .025]. Association of the ERCC2 rs13181 and rs1799793 polymorphisms was only observed in Asians (CC vs AA for rs13181: OR = 1.539, 95% CI = 1.122-2.109, P = .007; AA vs GG for rs1799793: OR = 1.474, 95% CI = 1.090-1.994, P = .012). However, no association was observed between glioma risk and ERCC1 rs11615, ERCC2 rs238406, and ERCC5 rs17655 polymorphisms. Moreover, sensitivity and cumulative meta-analyses confirmed the stability of the results. CONCLUSIONS Our meta-analysis indicated that the ERCC1 rs3212986 polymorphism and 2 polymorphisms in ERCC2 gene (rs13181 and rs1799793) contributed to the susceptibility of glioma.
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18
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Meta-analysis reveals no significant association between ERCC6 polymorphisms and bladder cancer risk. Int J Biol Markers 2017; 32:e113-e117. [PMID: 27791261 DOI: 10.5301/jbm.5000236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/26/2016] [Indexed: 11/20/2022]
Abstract
BACKGROUND Numerous studies have been conducted to evaluate the association between excision repair cross-complementing group 6 (ERCC6) gene polymorphisms and bladder cancer risk, but their findings have been inconsistent. Here we performed a meta-analysis to attempt to clarify this association. METHODS Studies were retrieved from the PubMed and China National Knowledge Infrastructure databases up to October 1, 2015, with strict selection and exclusion criteria. A total of 5,032 samples, comprising samples from 2,475 bladder cancer patients and 2,557 controls from 5 studies, were included in the meta-analysis. The odds ratio (OR) with 95% confidence interval (CI) was used to evaluate the strength of the associations. RESULTS Regarding the Met1097Val polymorphism, no significant association with bladder cancer risk was found in any of the genetic models evaluated (Val vs. Met: OR = 1.10, 95% CI, 0.97-1.25; Val/Val vs. Met/Met: OR = 1.23, 95% CI, 0.86-1.75; Val/Val + Val/Met vs. Met/Met: OR = 1.12, 95% CI, 0.96-1.30; Val/Val vs. Met/Met + Val/Met: OR = 0.81, 95% CI, 0.57-1.14). Similarly, as regards the Arg1230Pro polymorphism, we also found no positive results. CONCLUSIONS According to the results of our meta-analysis, there is no evidence of a link between the ERCC6 gene polymorphisms and bladder cancer risk. Well-designed further studies, with larger sample sizes and adjustment for confounders such as smoking status, are needed to confirm these conclusions.
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Perri F, Longo F, Giuliano M, Sabbatino F, Favia G, Ionna F, Addeo R, Della Vittoria Scarpati G, Di Lorenzo G, Pisconti S. Epigenetic control of gene expression: Potential implications for cancer treatment. Crit Rev Oncol Hematol 2017; 111:166-172. [PMID: 28259291 DOI: 10.1016/j.critrevonc.2017.01.020] [Citation(s) in RCA: 89] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Revised: 01/29/2017] [Accepted: 01/31/2017] [Indexed: 02/07/2023] Open
Abstract
Epigenetic changes are defined as inherited modifications that are not present in DNA sequence. Gene expression is regulated at various levels and not only in response to DNA modifications. Examples of epigenetic control are DNA methylation, histone deacetylation and mi-RNA expression. Methylation of several tumor suppressor gene promoters is responsible for their silencing and thus potentially sustain cancerogenesis. Similarly, histone deacetylation can lead to oncogene activation. mi-RNA are small (18-20 nucleotides) non-coding RNA fragments capable of inhibiting other m-RNA, ultimately altering the balance in oncogene and tumor suppressor gene expression. It has been shown that growth of several tumor types can be stimulated by epigenetic changes in various phases of cancerogenesis, and drugs able to interfere with these mechanisms can have a positive impact on tumor progression. As matter of fact, epigenetic changes are dynamic and can be reversed by epigenetic inhibitors. Recently, methyltransferase and histone deacetylase inhibitors have attracted the attention of researchers and clinicians as they potentially provide alternative therapeutic options in some cancers. Drugs that inhibit DNA methylation or histone deacetylation have been studied for the reactivation of tumor suppressor genes and repression of cancer cell growth. Epigenetic inhibitors work alone or in combination with other therapeutic agents. To date, a number of epigenetic inhibitors have been approved for cancer treatment. The main challenge in the field of epigenetic inhibitors is their lack of specificity. In this review article we describe their mechanisms of action and potential in cancer treatment.
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Affiliation(s)
- F Perri
- Medical Oncology Unit, POC SS Annunziata, Taranto, Italy.
| | - F Longo
- Otolaryngology Unit, National Tumor Institute of Naples, G. Pascale, Italy
| | - M Giuliano
- Department of Clinical Medicine and Surgery, University of Naples 'Federico II', Napoli, Italy; dLester and Sue Smith Breast Center, Baylor College of Medicine, Houston, TX, USA
| | - F Sabbatino
- Medical Oncology Department, University of Salerno, Italy
| | - G Favia
- Otolaryngology Unit, University of Bari, Italy
| | - F Ionna
- Otolaryngology Unit, National Tumor Institute of Naples, G. Pascale, Italy
| | - R Addeo
- San Giovanni di Dio Hospital, Department of Medical Oncology, Frattamaggiore, Naples, Italy
| | | | - G Di Lorenzo
- Medical Oncology Unit, University of Naples "Federico II", Italy
| | - S Pisconti
- Medical Oncology Unit, POC SS Annunziata, Taranto, Italy
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Gao M, He D, Meng F, Li J, Shen Y. Associations of DNMT3B -149C>T and -2437T>A polymorphisms and lung cancer risk in Chinese population. World J Surg Oncol 2016; 14:293. [PMID: 27876061 PMCID: PMC5118893 DOI: 10.1186/s12957-016-1052-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Accepted: 11/07/2016] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND DNMT3B polymorphisms are associated with the susceptibility of lung cancer. DNMT3B -2437T>A is a novel polymorphism, and its influence on the risk of lung cancer in Chinese was investigated in this study. In addition, effect of DNMT3B -149C>T polymorphism on lung cancer was also explored. METHODS Genotyping in subjects were performed by PCR-RFLP. Haplotype frequencies were estimated by estimating haplotype software. Adjusted odds ratios (ORs) with 95% confidence intervals (CIs) were calculated by unconditional logistic regression analysis. RESULTS Neither of the two polymorphisms was correlated with lung cancer (-149C>T: CT+TT vs CC: OR = 0.78, 95%CI, 0.57 to 1.05, P = 0.361; -2437T>A: AT+AA vs TT: OR = 0.99, 95%CI, 0.74 to 1.33, P = 0.168). In stratification analysis, T-allele carrier genotype of -149C>T polymorphism resulted in a reduced lung cancer risk at stage II, compared with CC (OR = 0.46, 95%CI, 0.28 to 0.77, P = 0.023). In haplotype analysis, when -149C/-2437T was used as reference, the other combined genotypes of the two polymorphisms had no significant effect on lung cancer risk (P > 0.05). CONCLUSIONS The two DNMT3B polymorphisms are not correlated with lung cancer risk among Chinese population nor the haplotype of them.
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Affiliation(s)
- Min Gao
- Department of Neurology, the Fourth Hospital of Harbin Medical University, 37 Yiyuan Street, Harbin, Heilongjiang 150001 China
| | - Daqiang He
- Department of Radiology, the Fourth Hospital of Harbin Medical University, Harbin, Heilongjiang China
| | - Fanji Meng
- Department of Cardiology, the Fourth Hospital of Harbin Medical University, Harbin, Heilongjiang China
| | - Jianing Li
- Department of Geriatrics, the Fourth Hospital of Harbin Medical University, Harbin, Heilongjiang China
| | - Yan Shen
- Department of Geriatrics, the Fourth Hospital of Harbin Medical University, Harbin, Heilongjiang China
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Ma Y, Deng XD, Feng Y, Zhang W, Wang SX, Liu Y, Liu H. Association of XPF Levels and Genetic Polymorphism with Susceptibility to Ischemic Stroke. J Mol Neurosci 2016; 59:168-76. [DOI: 10.1007/s12031-016-0729-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Accepted: 02/02/2016] [Indexed: 11/28/2022]
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Prognostic role of ERCC1 protein expression in upper tract urothelial carcinoma following radical nephroureterectomy with curative intent. World J Urol 2015; 34:1155-61. [PMID: 26658888 DOI: 10.1007/s00345-015-1737-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Accepted: 11/25/2015] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Excision repair cross-complementing 1 (ERCC1) has been associated with outcomes of urothelial carcinoma of the bladder, but was not yet studied in upper tract urothelial carcinoma (UTUC). The aim of this study was to assess the prognostic role of ERCC1 expression in a large international cohort of UTUC patients. METHODS Immunohistochemical ERCC1 expression was evaluated in 716 UTUC patients who underwent radical nephroureterectomy with curative intent. ERCC1 was considered positive when the H-score was >1.0. Associations with overall survival and cancer-specific survival were assessed using univariable and multivariable Cox models. RESULTS ERCC1 was expressed in 303 tumors (42.3 %) and linked with the presence of tumor necrosis (16.2 vs. 10.4 %, p = 0.023), but not with any other clinical or pathological variable. ERCC1 status did not predict cancer-specific survival and overall survival on both univariable (p = 0.70 and 0.32, respectively) and multivariable analyses (p = 0.48 and 0.33, respectively). CONCLUSIONS ERCC1 is expressed in a significant proportion of UTUC and is linked with tumor necrosis, but its expression appears not to be associated with prognosis following radical nephroureterectomy.
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Wang W, Fan X, Zhang Y, Yang Y, Yang S, Li G. Association Between COX-2 Polymorphisms and Lung Cancer Risk. Med Sci Monit 2015; 21:3740-7. [PMID: 26624903 PMCID: PMC4671405 DOI: 10.12659/msm.894839] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND Multiple relevant risk factors for lung cancer have been reported in different populations, but results of previous studies were not consistent. Therefore, a meta-analysis is necessary to summarize these outcomes and reach a relatively comprehensive conclusion. MATERIAL AND METHODS STATA 12.0 software was used for all statistical of the relationship between COX-2 polymorphisms and lung cancer risk. Inter-study heterogeneity was examined with the Q statistic (significance level at P<0.1). The publication bias among studies in the meta-analysis was analyzed with Begg's funnel plot and Egger's test. Hardy-Weinberg equilibrium was tested in all controls of the studies. RESULTS COX-2 rs20417 polymorphism had a significant association with reduced risk of lung cancer under homozygous and recessive models, and similar results were observed in white and population-based subgroups under 2 and 3 contrasts, respectively. Additionally, rs2066826 polymorphism manifested a strong correlation with increased risk of lung cancer under 5 genetic models. CONCLUSIONS In COX-2 gene, rs20417 may have a certain relationship with reduced risk of lung cancer, while rs2066826 may increase the risk of lung cancer.
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Affiliation(s)
- Weiwei Wang
- Department of Thoracic Surgery, The Third Affiliated Hospital of Kunming Medical University, Yunnan Provincial Tumor Hospital, Kunming, Yunnan, China (mainland)
| | - Xinyun Fan
- Department of Orthopedic Surgery, Kunming General Hospital, Kunming, Yunnan, China (mainland)
| | - Yong Zhang
- Department of Thoracic Surgery, The Third Affiliated Hospital of Kunming Medical University, Yunnan Provincial Tumor Hospital, Kunming, Yunnan, China (mainland)
| | - Yi Yang
- Department of Radiotherapy, The Third Affiliated Hospital of Kunming Medical University, Yunnan Provincial Tumor Hospital, Kunming, Yunnan, China (mainland)
| | - Siyuan Yang
- Institute of Clinical Medicine, Kunming Medical University, Kunming, Yunnan, China (mainland)
| | - Gaofeng Li
- Department of Thoracic Surgery, The Third Affiliated Hospital of Kunming Medical University, Yunnan Provincial Tumor Hospital, Kunming, Yunnan, China (mainland)
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Lee MS, Liu CY, Su L, Christiani DC. Polymorphisms in ERCC1 and ERCC2/XPD genes and carcinogen DNA adducts in human lung. Lung Cancer 2015; 89:8-12. [PMID: 26001533 PMCID: PMC4457615 DOI: 10.1016/j.lungcan.2015.05.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Revised: 04/28/2015] [Accepted: 05/02/2015] [Indexed: 12/21/2022]
Abstract
OBJECTIVES In this exploratory study, we aimed to investigate whether polymorphisms in excision repair cross-complementing group 1 (ERCC1) and excision repair cross-complementing group 2/xeroderma pigmentosum group D (ERCC2/XPD) in the nucleotide excision repair (NER) pathways associated with DNA adducts in human lung tissue. We also analyzed the association stratified by the major histologic subtypes of non-small cell lung cancer (NSCLC): adenocarcinoma (ADC) and squamous cell carcinoma (SQCC). METHODS The study population consisted of 107 early stage NSCLC patients from the Massachusetts General Hospital (MGH) in Boston who underwent curative surgical resection. Genotyping was completed for SNPs in ERCC1 [C8092A (rs3212986) and C118T (rs11615)] and ERCC2/XPD [Asp312Asn (rs1799793) and Lys751Gln (rs1052559)] using a PCR-RFLP method and the PCR with fluorescent allele-specific oligonucleotide probes (Taqman). DNA adduct levels were measured as relative adduct levels per 10(10) nucleotides by (32)P-postlabeling in non-tumor lung tissue. RESULTS After adjusting for potential confounders, lung DNA adduct levels increased by 103.2% [95% confidence interval (CI), -11.5 to 366.6] for ERCC2/XPD rs1799793AA genotype compared with their corresponding wild type homozygous genotypes in overall NSCLC, but the difference did not reach statistical significance. When we stratified by the subtypes of NSCLC, we found that DNA adducts levels in lung increased by 204.9% (95% CI, 0.8 to 822.2, P=0.059) for ERCC2/XPD rs1799793AA genotype in subjects with SQCC and the trend was statistically significant (P for trend=0.0489). CONCLUSIONS Polymorphisms in ERCC2/XPD Asp312Asn may be associated with increased DNA adduct levels in the lung, especially among subjects with SQCC. Further large scale studies are needed to confirm our findings.
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Affiliation(s)
- Mi-Sun Lee
- Environmental and Occupational Medicine and Epidemiology Program, Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Chen-yu Liu
- Institute of Environmental Health, College of Public Health, National Taiwan University, Taipei, Taiwan
| | - Li Su
- Environmental and Occupational Medicine and Epidemiology Program, Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - David C Christiani
- Environmental and Occupational Medicine and Epidemiology Program, Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA; Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA.
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Zhang G, Gu C, Zhu Y, Luo L, Dong D, Wan F, Zhang H, Shi G, Sun L, Ye D. ADIPOQ polymorphism rs182052 is associated with clear cell renal cell carcinoma. Cancer Sci 2015; 106:687-691. [PMID: 25827778 PMCID: PMC4471788 DOI: 10.1111/cas.12664] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Revised: 03/15/2015] [Accepted: 03/24/2015] [Indexed: 12/12/2022] Open
Abstract
Recent studies have indicated that low circulating adiponectin concentrations are associated with a higher risk of several cancers, including renal cell carcinoma. In this case–control study, we examined the frequency of single nucleotide polymorphisms (rs182052G>A, rs266729C>G, and rs3774262G>A) in the adiponectin gene (ADIPOQ) in 1004 patients with clear cell renal cell carcinoma (ccRCC) compared with a group of healthy subjects (n = 1108). Fasting serum adiponectin concentrations were also examined. Logistic regression models were used to estimate odds ratios (OR) and 95% confidence intervals (95% CI). The association of serum adiponectin concentration with genetic variants was calculated using a multivariate linear regression model. A significantly higher ccRCC risk was associated with the rs182052 variant A allele (adjusted OR, 1.36 and 95% CI, 1.07–1.74 for AA vs GG, P = 0.013; adjusted OR, 1.27 and 95% CI, 1.04–1.56 for AA vs GG+AG, P = 0.019), and this positive association was more evident in overweight subjects. Fasting serum adiponectin was lower in subjects carrying A alleles of rs182052 in both ccRCC patients (β = −0.399, P = 0.018) and healthy controls (β = −0.371, P = 0.024). These results suggest that ADIPOQ rs182052 is significantly associated with ccRCC risk. In this case–control study, we examined the frequency of single nucleotide polymorphisms (rs182052G>A, rs266729C>G, and rs3774262G>A) in the adiponectin gene (ADIPOQ) in 1004 patients with clear cell RCC (ccRCC) compared with a group of healthy subjects (n = 1108). Fasting serum adiponectin concentrations were also examined. Fasting serum adiponectin was lower in subjects carrying minor alleles of rs182052 in both ccRCC patients (β = −0.399, P = 0.018) and healthy controls (β = −0.371, P = 0.024). These results suggest that ADIPOQ rs182052 is significantly associated with ccRCC risk.
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Affiliation(s)
- Guiming Zhang
- Department of Urology, Fudan University Shanghai Cancer Center, Shanghai, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Chengyuan Gu
- Department of Urology, Fudan University Shanghai Cancer Center, Shanghai, China
| | - Yao Zhu
- Department of Urology, Fudan University Shanghai Cancer Center, Shanghai, China
| | - Lei Luo
- Department of Urology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Dahai Dong
- Department of Urology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Fangning Wan
- Department of Urology, Fudan University Shanghai Cancer Center, Shanghai, China
| | - Hailiang Zhang
- Department of Urology, Fudan University Shanghai Cancer Center, Shanghai, China
| | - Guohai Shi
- Department of Urology, Fudan University Shanghai Cancer Center, Shanghai, China
| | - Lijiang Sun
- Department of Urology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Dingwei Ye
- Department of Urology, Fudan University Shanghai Cancer Center, Shanghai, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
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Zhang JL, Wang HY, Yang Q, Lin SY, Luo GY, Zhang R, Xu GL. Methyl-methanesulfonate sensitivity 19 expression is associated with metastasis and chemoradiotherapy response in esophageal cancer. World J Gastroenterol 2015; 21:4240-4247. [PMID: 25892874 PMCID: PMC4394085 DOI: 10.3748/wjg.v21.i14.4240] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Revised: 12/20/2014] [Accepted: 01/30/2015] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the clinical significance of methyl-methanesulfonate sensitivity 19 (MMS19) expression in esophageal squamous cell carcinoma (ESCC).
METHODS: Between June 2008 and May 2013, specimens from 103 patients who underwent endoscopic biopsy for the diagnosis of ESCC at the endoscopy center of Sun Yat-Sen University Cancer Center were collected; 52 matched-normal esophageal squamous epithelium samples were biopsied as controls. MMS19 protein expression was measured by immunohistochemistry. Of the 103 cases of ESCC, 49 received radical surgery following neoadjuvant chemoradiotherapy consisting of concurrent radiation in a total dose of 40 Gy and two cycles of chemotherapy with vinorelbine and cisplatin. Relationships between MMS19 expression, clinicopathologic characteristics and chemoradiotherapy response were analyzed.
RESULTS: The MMS19 protein could be detected in both the cytoplasm and nucleus of most specimens. High cytoplasmic expression of MMS19 was detected in 63.1% of ESCC samples, whereas high nuclear expression of MMS19 was found in 35.0%. High cytoplasmic MMS19 expression was associated with regional lymph node metastases (OR = 11.3, 95%CI: 2.3-54.7; P < 0.001) and distant metastases (OR = 13.1, 95%CI: 1.7-103.0; P = 0.002). Furthermore, high cytoplasmic MMS19 expression was associated with a response of ESCC to chemoradiotherapy (OR = 11.5, 95%CI: 3.0-44.5; P < 0.001), with a high cytoplasmic MMS19 expression rates in 79.3% and 25.0% of patients from the good chemoradiotherapy response group and poor response group, respectively. Nuclear MMS19 expression did not show any significant association with clinicopathologic characteristics or chemoradiotherapy response in ESCC.
CONCLUSION: The results of our preliminary study suggest that MMS19 may be a potential new predictor of metastasis and chemoradiotherapy response in ESCC.
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Lloyd KL, Cree IA, Savage RS. Prediction of resistance to chemotherapy in ovarian cancer: a systematic review. BMC Cancer 2015; 15:117. [PMID: 25886033 PMCID: PMC4371880 DOI: 10.1186/s12885-015-1101-8] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2014] [Accepted: 02/20/2015] [Indexed: 11/17/2022] Open
Abstract
Background Patient response to chemotherapy for ovarian cancer is extremely heterogeneous and there are currently no tools to aid the prediction of sensitivity or resistance to chemotherapy and allow treatment stratification. Such a tool could greatly improve patient survival by identifying the most appropriate treatment on a patient-specific basis. Methods PubMed was searched for studies predicting response or resistance to chemotherapy using gene expression measurements of human tissue in ovarian cancer. Results 42 studies were identified and both the data collection and modelling methods were compared. The majority of studies utilised fresh-frozen or formalin-fixed paraffin-embedded tissue. Modelling techniques varied, the most popular being Cox proportional hazards regression and hierarchical clustering which were used by 17 and 11 studies respectively. The gene signatures identified by the various studies were not consistent, with very few genes being identified by more than two studies. Patient cohorts were often noted to be heterogeneous with respect to chemotherapy treatment undergone by patients. Conclusions A clinically applicable gene signature capable of predicting patient response to chemotherapy has not yet been identified. Research into a predictive, as opposed to prognostic, model could be highly beneficial and aid the identification of the most suitable treatment for patients. Electronic supplementary material The online version of this article (doi:10.1186/s12885-015-1101-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Katherine L Lloyd
- MOAC DTC, University of Warwick, Gibbet Hill Road, Coventry, CV4 7AL, UK.
| | - Ian A Cree
- Warwick Medical School, University of Warwick, Gibbet Hill Road, Coventry, CV4 7AL, UK.
| | - Richard S Savage
- Warwick Medical School, University of Warwick, Gibbet Hill Road, Coventry, CV4 7AL, UK. .,Systems Biology Centre, University of Warwick, Gibbet Hill Road, Coventry, CV4 7AL, UK.
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Jia N, Xu J, Zhao H, Wang Y, Wang B, Niu W. Do genetic defects of DNA repair relevant proteins alter susceptibility to hypertension? A case-control study in northeastern Han Chinese. Clin Chim Acta 2015; 441:171-5. [PMID: 25529925 DOI: 10.1016/j.cca.2014.12.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2014] [Revised: 11/14/2014] [Accepted: 12/15/2014] [Indexed: 11/16/2022]
Abstract
The aim of this study was to examine the individual and interactive associations of five non-synonymous variants of four DNA repair relevant genes (XRCC1, XRCC3, hOGG1, NQO1) with hypertension in a large northeastern Han Chinese population. This was a hospital-based study involving 1009 hypertensive patients and 756 normotensive controls. All five variants satisfied the Hardy-Weinberg equilibrium. With a Bonferroni corrected alpha of 0.05/5, significance was only attained in the genotype (P=0.007) and allele (P=0.006) distributions of rs25487 in XRCC1 gene between patients and controls, with its mutant allele conferring 29% (95% CI: 1.09-1.53; P=0.003), 31% (95% CI: 1.05-1.62; P=0.015) and 66% (95%CI: 1.10-2.52; P=0.016) increased risks of hypertension under the additive, dominant and recessive models, respectively after adjusting for confounders. The frequency of allele combination C-A-C-G-C (alleles in order of rs1799782, rs25487, rs861539, rs1052133 and rs1800566) was significantly higher in patients than in controls (P=0.003), while that of C-G-C-C-C was significantly lower (P=0.001). Interaction analysis failed to identify any suggestive evidence of synergism across five examined variants. Our findings provide evidence for a contributory role of XRCC1 gene rs25487 variant in the development of hypertension, and this variant possibly acted in a recessive pattern.
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Affiliation(s)
- Nan Jia
- Department of Cardiology, The Fourth People's Hospital of Shenzhen, Shenzhen, Guangdong, China.
| | - Junxia Xu
- The First Clinical Medical College, Fujian Medical University, Fuzhou, Fujian, China
| | - Hongye Zhao
- Department of Physiology, Qiqihar Medical University, Qiqihar, Heilongjiang, China
| | - Yanli Wang
- The Third Division of Cardiology, Department of Internal Medicine, The Second Affiliated Hospital of Qiqihar Medical University, Qiqihar, Heilongjiang, China
| | - Bin Wang
- Department of Physiology, Qiqihar Medical University, Qiqihar, Heilongjiang, China.
| | - Wenquan Niu
- State Key Laboratory of Medical Genomics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China; Shanghai Institute of Hypertension, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China; Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, Texas, United States of America.
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Yang B, Chen WH, Wen XF, Liu H, Liu F. Role of DNA repair-related gene polymorphisms in susceptibility to risk of prostate cancer. Asian Pac J Cancer Prev 2015; 14:5839-42. [PMID: 24289586 DOI: 10.7314/apjcp.2013.14.10.5839] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
AIM We assessed the association between genetic variants of XPG, XPA, XPD, CSB, XPC and CCNH in the nucleotide excision repair (NER) pathway and risk of prostate cancer. METHODS We genotyped the XPG, XPA, XPD, CSB, XPC and CCNH polymorphisms by a 384-well plate format on the MassARRAY® platform. Multivariate logistical regression analysis was used to assess the associations between the six gene polymorphisms and risk of prostate cancer. RESULTS Individuals carrying the XPG rs229614 TT (OR=2.01, 95%CI=1.35-3.27) genotype and T allele (OR=1.73, 95%CI=1.37-2.57) were moderately significantly associated with a higher risk of prostate cancer. Subjects with XPD rs13181 G allele had a marginally increased risk of prostate cancer, with adjusted OR(95%CI) of 1.53 (1.04-2.37). Moreover, individuals carrying with CSB rs2228526 GG genotype (OR=2.05, 95% CI=1.23-3.52) and G allele (OR=1.56, 95%CI=1.17-2.05) were associated with a higher increased risk of prostate cancer. The combination genotype of XPG rs2296147 T and CSB rs2228526 G allele had accumulative effect on the risk of this cancer, with an OR (95% CI) of 2.23(1.37-3.59). CONCLUSIONS Our study indicates that XPG rs2296147 and CSB rs2228526 polymorphisms are significantly associated with increased risk of prostate cancer, and that combination of XPG rs2296147 T allele and CSB rs2228526 G allele is strongly associated with an increased risk.
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Affiliation(s)
- Bo Yang
- Department of Urology Surgery, Shanghai Pudong New Area Zhoupu Hospital, Shanghai, China E-mail :
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Qiu J, Wang X, Meng X, Zheng Y, Li G, Ma J, Ye G, Li Y, Li J. Attenuated NER expressions of XPF and XPC associated with smoking are involved in the recurrence of bladder cancer. PLoS One 2014; 9:e115224. [PMID: 25535740 PMCID: PMC4275238 DOI: 10.1371/journal.pone.0115224] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2014] [Accepted: 11/20/2014] [Indexed: 01/01/2023] Open
Abstract
The varied NER genes and smoking are two important risk factors of bladder cancer, but the mechanism of the NER protein and smoking in cancer progression, however, remains unclear. In this report, we compared the expressions of NER genes in 79 bladder cancer tissues with or without any recurrence by real-time PCR and then analyzed the varied NER genes by immunochemistry in 219 bladder cancer tissue samples. Based on the clinical data, we analyzed the clinical value of varied NER genes and smoking in 219 bladder cancers by the Kaplan-Meier method and Cox proportional hazards regression. We found the expressions of the NER gene XPF and XPC were significantly lower in bladder cancer tissues with a recurrence compared with those without a recurrence at mRNA level. Also, the patients with the XPF and XPC defect had a statistically significant lower median recurrence-free survival time than those without the XPF and XPC defect, and smoking can make this difference more remarkable. Our results suggest that XPF and XPC expression may be a potential predictive factor for bladder cancer, and smoking can not only influence the recurrence of bladder cancer as a single factor but also aggravate the results of the XPF defect and XPC defect.
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Affiliation(s)
- Jianhong Qiu
- Department of Urology, Bethune International Peace Hospital, Shijiazhuang, China
| | - Xiangwei Wang
- Department of Urology, The Second Affiliated Hospital, The Third Military Medical University, Chongqing, China
| | - Xiaodong Meng
- Department of Urology, Bethune International Peace Hospital, Shijiazhuang, China
| | - Yan Zheng
- Department of Urology, Bethune International Peace Hospital, Shijiazhuang, China
| | - Gang Li
- Department of Urology, Bethune International Peace Hospital, Shijiazhuang, China
| | - Jiyao Ma
- Department of Urology, Bethune International Peace Hospital, Shijiazhuang, China
| | - Gang Ye
- Department of Urology, The Second Affiliated Hospital, The Third Military Medical University, Chongqing, China
| | - Yong Li
- Department of Urology, Bethune International Peace Hospital, Shijiazhuang, China
| | - Jie Li
- Department of Urology, Bethune International Peace Hospital, Shijiazhuang, China
- * E-mail:
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Chen XP, Xu WH, Xu DF, Xie XH, Yao J, Fu SM. GSTM1 Polymorphisms and Lung Cancer Risk in the Chinese Population: a Meta-Analysis Based on 47 Studies. Asian Pac J Cancer Prev 2014; 15:7741-6. [DOI: 10.7314/apjcp.2014.15.18.7741] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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32
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Wang X, Oldani MJ, Zhao X, Huang X, Qian D. A review of cancer risk prediction models with genetic variants. Cancer Inform 2014; 13:19-28. [PMID: 25288876 PMCID: PMC4179686 DOI: 10.4137/cin.s13788] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2014] [Revised: 06/30/2014] [Accepted: 07/01/2014] [Indexed: 12/31/2022] Open
Abstract
Cancer risk prediction models are important in identifying individuals at high risk of developing cancer, which could result in targeted screening and interventions to maximize the treatment benefit and minimize the burden of cancer. The cancer-associated genetic variants identified in genome-wide or candidate gene association studies have been shown to collectively enhance cancer risk prediction, improve our understanding of carcinogenesis, and possibly result in the development of targeted treatments for patients. In this article, we review the cancer risk prediction models that have been developed for popular cancers and assess their applicability, strengths, and weaknesses. We also discuss the factors to be considered for future development and improvement of models for cancer risk prediction.
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Affiliation(s)
- Xuexia Wang
- Joseph J. Zilber School of Public Health, University of Wisconsin-Milwaukee, Milwaukee, WI, USA
| | - Michael J Oldani
- Criminology and Anthropology Department, University of Wisconsin-Whitewater, Whitewater, WI, USA
| | - Xingwang Zhao
- Joseph J. Zilber School of Public Health, University of Wisconsin-Milwaukee, Milwaukee, WI, USA
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Wen F, Zhao Z, Liu C, Yin Q, Weng J, Wang Y, Ma Y. A pooled analysis of the ERCC2 Asp312Asn polymorphism and esophageal cancer susceptibility. Tumour Biol 2014; 35:2959-65. [PMID: 24234258 DOI: 10.1007/s13277-013-1380-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2013] [Accepted: 10/30/2013] [Indexed: 01/11/2023] Open
Abstract
Published data regarding the association between the excision repair cross-complimentary group 2 (ERCC2) Asp312Asn polymorphisms and esophageal cancer susceptibility remained controversial. This meta-analysis of literatures was performed to assess the strength of association between the ERCC2 and esophageal cancer susceptibility using random effects model. We systematically searched PubMed, Embase and Web of Science with a time limit of September 15, 2013. Summary odds ratios (ORs) with 95 % confidence intervals (CIs) were used to assess the strength of association between the ERCC2 Asp312Asn polymorphism and esophageal cancer susceptibility using random effects model. A total of seven case-control studies including 1,831 cases and 2,728 controls were included for analysis. Overall, a significant association was found between ERCC2 Asp312Asn polymorphism and esophageal cancer susceptibility for GA vs. GG (OR = 1.20, 95 % CI = 1.03-1.40) and for the dominant model GA/AA vs. GG (OR = 1.18, 95 % CI = 1.03-1.35). However, the ERCC2 Asp312Asn polymorphism was a protective factor for AA vs. GA/GG (OR = 0.63, 95 % CI = 1.15-2.65) in esophageal squamous cell carcinoma. Our meta-analysis suggested that the ERCC2 Asp312Asn polymorphism might be associated with increased risk of esophageal adenocarcinoma and a protective factor for esophageal squamous cell carcinoma.
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Genetic variants of the matrix metalloproteinase family genes and risk for hypertension: a case-control study among northeastern Han Chinese. Hypertens Res 2014; 37:944-9. [PMID: 24830539 DOI: 10.1038/hr.2014.97] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2014] [Revised: 03/04/2014] [Accepted: 04/05/2014] [Indexed: 12/20/2022]
Abstract
In this study, we sought to examine the association between 10 genetic variants in the matrix metalloproteinase (MMP) family genes and the risk of hypertension among northeastern Han Chinese. This was a hospital-based case-control study involving 1009 sporadic hypertensive patients and 756 age-, gender- and ethnicity-matched normotensive controls. The genotypes of the 10 examined variants were determined by PCR-ligase detection reaction method. The genotype/allele distributions of rs3025058 and rs679620 differed significantly between patients and controls, with a Bonferroni corrected α of 0.05/10. The probability of having hypertension was significant for rs3025058 under the additive (odds ratio; 95% confidence interval; P: 1.33; 1.16-1.53; <0.001) and dominant (1.43; 1.18-1.73; <0.001) models and was significant for rs679620 under the additive (1.27; 1.1-1.46; <0.001) model after adjusting for confounders. In a combined analysis, when compared with the reference group (score<3.5 for unfavorable genotypes), participants in the medium- and high-risk groups had odds ratios that increased to 1.61 (95% CI: 1.25-2.51; P<0.001) and 1.92 (95% CI: 1.54-2.39; P<0.001) after adjustment, respectively. Interaction analysis showed that a three-locus model including rs3025058, rs679620 and rs243865 was the best, with a maximum testing accuracy of 0.6605 and a cross-validation consistency of 10 (P=0.0022). Taken together, our findings suggest that the true association between individual variants and the risk of hypertension may not be revealed until combined analyses of multiple variants from genes involving a specific physiological or cellular function are performed. Moreover, we propose a three-locus model that can best characterize the genetic interactions of the MMP multiple gene family.
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Association of single-nucleotide polymorphisms in ERCC1 and ERCC2 with glioma risk. Tumour Biol 2014; 35:7451-7. [PMID: 24782032 DOI: 10.1007/s13277-014-1969-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2014] [Accepted: 04/11/2014] [Indexed: 12/31/2022] Open
Abstract
We conducted a case-control study to assess the role of three single-nucleotide polymorphisms (SNPs) in excision repair cross-complementation group 1 (ERCC1) and two SNPs in excision repair cross-complementation group 2 (ERCC2) on the glioma risk in a Chinese population, and investigate the gene-environmental interaction for the cancer risk. A 1:2 matched case-control study was conducted. Logistic regression analysis revealed that individuals carrying ERCC1 rs2298881 CC genotype were associated with risk of glioma when compared with AA genotype carriers. The significant associations of ERCC1 rs2298881 polymorphism with glioma susceptibility were observed in both the dominant and the recessive models. In a stratification analysis, we found that ERCC1 rs2298881 variants showed an increased association with the risk of glioma in males, ever smokers, and high-grade glioma cases. In conclusion, our study suggests that ERCC1 rs2298881 polymorphism is associated with risk of glioma in codominant, dominant, and recessive models, especially in males, smokers, and high-grade glioma cases. This finding could be useful in revealing the genetic characteristics of glioma and suggests more effective strategies for prevention and treatment.
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He J, Wang MY, Qiu LX, Zhu ML, Shi TY, Zhou XY, Sun MH, Yang YJ, Wang JC, Jin L, Wang YN, Li J, Yu HP, Wei QY. Genetic variations of mTORC1 genes and risk of gastric cancer in an Eastern Chinese population. Mol Carcinog 2013; 52 Suppl 1:E70-9. [PMID: 23423739 DOI: 10.1002/mc.22013] [Citation(s) in RCA: 108] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2012] [Revised: 12/09/2012] [Accepted: 01/13/2013] [Indexed: 02/05/2023]
Abstract
Mammalian target of rapamycin complex 1 (mTORC1) plays an important role in maintaining proper cellular functions, and genetic variations in this complex may affect cancer risk. In this study, we examined the associations between eight potential functional single nucleotide polymorphisms in the mTORC1 genes (rs2536T>C and rs1883965G>A for mTOR, rs3160T>C, and rs26865A>G for mLST8, rs3751934C>A, rs1062935T>C, rs3751932T>C, and rs12602885G>A for Raptor, not included in published gastric cancer genome-wide association studies) and gastric cancer risk in 1125 gastric cancer cases and 1196 cancer-free controls. We performed conditional logistic regression and multifactor dimensionality reduction (MDR) analyses to assess their associations with gastric cancer risk. We also used false-positive report probabilities (FPRP) for assessing significant findings. We found that only the rs1883965A variant genotypes were associated with an increased risk of gastric cancer (AG vs. GG: adjusted odds ratio (OR) = 1.26, 95% confidence interval (CI) = 1.00-1.59; AA vs. GG: adjusted OR = 1.85, 95% CI = 0.67-5.16 and dominant model: adjusted OR = 1.28, 95% CI = 1.03-1.61). Patients with ≥1 risk genotypes of mTOR had significant increased risk (adjusted OR = 1.25, 95% CI = 1.04-1.49), compared with those having zero risk genotypes. In the stratified analysis, the risk effect of the rs1883965 AG/AA genotypes was evident in subgroups of ever-smokers, non-gastric cardia adenocarcinoma and clinical stage I + II, which were noteworthy findings as evaluated by FPRP. The MDR analysis identified smoking status and rs1883965 as the strongest two-factors for gastric cancer risk. These data support the hypothesis that functional polymorphisms of mTOR may contribute to gastric cancer risk. Clearly, our results require validation in larger studies with different ethnic populations.
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Affiliation(s)
- Jing He
- Cancer Institute, Fudan University Shanghai Cancer Center, Shanghai, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
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Li Y, Liu Z, Liu H, Wang LE, Tan D, Ajani JA, Wei QY. ERCC1 and ERCC2 variants predict survival in gastric cancer patients. PLoS One 2013; 8:e71994. [PMID: 24023723 PMCID: PMC3759385 DOI: 10.1371/journal.pone.0071994] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2013] [Accepted: 07/12/2013] [Indexed: 01/28/2023] Open
Abstract
Purpose ERCC1 and ERCC2 play critical roles in the nucleotide excision repair pathway that effectively repairs DNA damage induced by chemotherapeutic agents. Therefore, functional single nucleotide polymorphisms (SNPs) in these genes could have an impact on clinical outcomes in cancer patients who received chemotherapy. However, few studies have simultaneously investigated the roles of ERCC1 and ERCC2 SNPs in clinical outcomes in gastric cancer patients. Experimental Design We genotyped by the TaqMan assay three common, potentially functional ERCC1 (rs3212986) and ERCC2 SNPs (rs13181 and rs1799793) in 360 gastric cancer patients. We used both Kaplan-Meier tests and Cox proportional hazards models to evaluate the effects of ERCC1 and ERCC2 genotypes and haplotypes on clinical outcomes. Results We found that, compared with ERCC2 rs1799793 GG+AG genotypes, the homozygous variant AA genotype was associated with significantly poorer overall survival (OS) (AA vs. GG+AG, log-rank P = 0.012) and significantly higher risk of death (AA vs. GG+AG, Adjusted hazards ratio [HR] 2.13; 95% CI, 1.28 to 3.56; P = 0.004). In combined analyses, patients with any one of the three unfavorable genotypes (i.e. ERCC1 rs3212986 TT, ERCC2 rs13181 GG and rs1799793 AA) had statistically significant hazards of poor prognosis (Adjusted HR, 1.54; 95% CI, 1.06 to 2.25; P = 0.025), compared with those without any unfavorable genotypes. Furthermore, the haplotype A-G-G (rs1799793/rs13181/rs3212986) had a significant impact on OS (Adjusted HR, 1.57; 95% CI, 1.11 to 2.21; P = 0.011), compared with the common haplotype G-T-G. Conclusion ERCC1 and ERCC2 functional SNPs may jointly affect OS in Caucasian gastric cancer patients. Additional large prospective studies are essential to confirm our findings.
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Affiliation(s)
- Yangkai Li
- Department of Epidemiology, the University of Texas MD Anderson Cancer Center, Houston, Texas, United States of America
| | - Zhensheng Liu
- Department of Epidemiology, the University of Texas MD Anderson Cancer Center, Houston, Texas, United States of America
| | - Hongliang Liu
- Department of Epidemiology, the University of Texas MD Anderson Cancer Center, Houston, Texas, United States of America
| | - Li-E Wang
- Department of Epidemiology, the University of Texas MD Anderson Cancer Center, Houston, Texas, United States of America
| | - Dongfeng Tan
- Department of Pathology, the University of Texas MD Anderson Cancer Center, Houston, Texas, United States of America
| | - Jaffer A. Ajani
- Department of Gastrointestinal Medical Oncology, the University of Texas MD Anderson Cancer Center, Houston, Texas, United States of America
| | - Qing-Yi Wei
- Department of Epidemiology, the University of Texas MD Anderson Cancer Center, Houston, Texas, United States of America
- * E-mail:
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Wyss AB, Herring AH, Avery CL, Weissler MC, Bensen JT, Barnholtz-Sloan JS, Funkhouser WK, Olshan AF. Single-nucleotide polymorphisms in nucleotide excision repair genes, cigarette smoking, and the risk of head and neck cancer. Cancer Epidemiol Biomarkers Prev 2013; 22:1428-45. [PMID: 23720401 PMCID: PMC3766549 DOI: 10.1158/1055-9965.epi-13-0185] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Cigarette smoking is associated with increased head and neck cancer (HNC) risk. Tobacco-related carcinogens are known to cause bulky DNA adducts. Nucleotide excision repair (NER) genes encode enzymes that remove adducts and may be independently associated with HNC, as well as modifiers of the association between smoking and HNC. METHODS Using population-based case-control data from the Carolina Head and Neck Cancer Epidemiology (CHANCE) Study (1,227 cases and 1,325 controls), race-stratified (White, African American), conventional, and hierarchical logistic regression models were used to estimate ORs with 95% intervals (I) for the independent and joint effects of cigarette smoking and 84 single-nucleotide polymorphisms (SNP) from 15 NER genes on HNC risk. RESULTS The odds of HNC were elevated among ever cigarette smokers and increased with smoking duration and frequency. Among Whites, rs4150403 on ERCC3 was associated with increased HNC odds (AA+AG vs. GG; OR, 1.28; 95% CI, 1.01-1.61). Among African Americans, rs4253132 on ERCC6 was associated with decreased HNC odds (CC+CT vs. TT; OR, 0.62; 95% CI, 0.45-0.86). Interactions between ever cigarette smoking and three SNPs (rs4253132 on ERCC6, rs2291120 on DDB2, and rs744154 on ERCC4) suggested possible departures from additivity among Whites. CONCLUSIONS We did not find associations between some previously studied NER variants and HNC. We did identify new associations between two SNPs and HNC and three suggestive cigarette-SNP interactions to consider in future studies. IMPACT We conducted one of the most comprehensive evaluations of NER variants, identifying a few SNPs from biologically plausible candidate genes associated with HNC and possibly interacting with cigarette smoking.
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Affiliation(s)
- Annah B. Wyss
- Department of Epidemiology, University of North Carolina Gillings School of Global Public Health, Chapel Hill, NC, USA
| | - Amy H. Herring
- Department of Biostatistics, University of North Carolina Gillings School of Global Public Health, Chapel Hill, NC, USA
- Carolina Population Center, University of North Carolina Chapel Hill, NC, USA
| | - Christy L. Avery
- Department of Epidemiology, University of North Carolina Gillings School of Global Public Health, Chapel Hill, NC, USA
| | - Mark C. Weissler
- Department of Otolaryngology/Head and Neck Surgery, University of North Carolina School of Medicine, Chapel Hill, NC, USA
| | - Jeannette T. Bensen
- Department of Epidemiology, University of North Carolina Gillings School of Global Public Health, Chapel Hill, NC, USA
- Lineberger Comprehensive Cancer Center, University of North Carolina Chapel Hill, Chapel Hill, NC, USA
| | | | - William K. Funkhouser
- Department of Pathology and Laboratory Medicine, University of North Carolina School of Medicine, Chapel Hill, NC, USA
| | - Andrew F. Olshan
- Department of Epidemiology, University of North Carolina Gillings School of Global Public Health, Chapel Hill, NC, USA
- Carolina Population Center, University of North Carolina Chapel Hill, NC, USA
- Lineberger Comprehensive Cancer Center, University of North Carolina Chapel Hill, Chapel Hill, NC, USA
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Tagging SNPs in the ERCC4 gene are associated with gastric cancer risk. Gene 2013; 521:50-4. [DOI: 10.1016/j.gene.2013.03.046] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2012] [Revised: 02/02/2013] [Accepted: 03/14/2013] [Indexed: 11/22/2022]
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Hussain T, Kotnis A, Sarin R, Mulherkar R. Genetic susceptibility to multiple primary neoplasms in the upper aero-digestive tract: genotype score and phenotype correlation. Cancer Lett 2013; 332:46-54. [PMID: 23348701 DOI: 10.1016/j.canlet.2013.01.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2012] [Revised: 01/04/2013] [Accepted: 01/08/2013] [Indexed: 01/12/2023]
Abstract
Early detection and treatment of head and neck cancer has led to increased patient survival. However such patients are at a high risk for multiple primary neoplasm(s) (MPN). In order to study the genetic susceptibility to MPN, 22 candidate SNPs were genotyped based on which a distinctive Genotype Score was created using Additive, Dominant and Recessive models. Using lymphoblastoid cell lines (LCLs) generated from these individuals, the Genotype Score was correlated with carcinogen sensitivity in vitro. LCLs from MPN patients exhibited significantly higher Genotype Score and showed resistance to genotoxic agents compared to matched controls. This report demonstrates quantitative assessment of cumulative effect of gene polymorphisms and its correlation with carcinogen sensitivity for predicting susceptibility to MPN.
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Affiliation(s)
- Tabish Hussain
- Advanced Centre for Treatment, Research and Education in Cancer (ACTREC), Tata Memorial Centre, Kharghar, Navi Mumbai 410 210, Maharashtra, India
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He J, Xu Y, Qiu LX, Li J, Zhou XY, Sun MH, Wang JC, Yang YJ, Jin L, Wei QY, Wang Y. Polymorphisms in ERCC1 and XPF genes and risk of gastric cancer in an eastern Chinese population. PLoS One 2012; 7:e49308. [PMID: 23166636 PMCID: PMC3499547 DOI: 10.1371/journal.pone.0049308] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2012] [Accepted: 10/08/2012] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Inherited functional single nucleotide polymorphisms (SNPs) in DNA repair genes may alter DNA repair capacity and thus contribute to cancer risk. METHODS Three ERCC1 functional SNPs (rs2298881C>A, rs3212986C>A and rs11615G>A) and two XPF/ERCC4 functional SNPs (rs2276466C>G and rs6498486A>C) were genotyped for 1125 gastric adenocarcinoma cases and 1196 cancer-free controls by Taqman assays. Odds ratios (OR) and 95% confidence intervals (CI) were used to estimate risk associations, and false-positive report probabilities (FPRP) were calculated for assessing significant findings. RESULTS ERCC1 rs2298881C and rs11615A variant genotypes were associated with increased gastric cancer risk (adjusted OR=1.33, 95% CI=1.05-1.67 for rs2298881 AC/CC and adjusted OR=1.23, 95% CI=1.05-1.46 for rs11615 AG/AA, compared with their common genotype AA and GG, respectively). Patients with 2-3 ERCC1 risk genotypes had significant increased risk (adjusted OR=1.56, 95% CI=1.27-1.93), compared with those with 0-1 ERCC1 risk genotypes, and this risk was more significantly in subgroups of never drinkers, non-gastric cardia adenocarcinoma (NGCA) and clinical stage I+II. All these risks were not observed for XPF SNPs. CONCLUSIONS These findings suggest that functional ERCC1 SNPs may contribute to risk of gastric cancer. Larger and well-designed studies with different ethnic populations are needed to validate our findings.
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Affiliation(s)
- Jing He
- Cancer Research Laboratory, Fudan University Shanghai Cancer Center, Shanghai, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Yu Xu
- Department of Gastric Cancer & Soft Tissue Sarcoma Surgery, Fudan University Shanghai Cancer Center, Shanghai, China
| | - Li-Xin Qiu
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
- Department of Medical Oncology, Fudan University Shanghai Cancer Center, Shanghai, China
| | - Jin Li
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
- Department of Medical Oncology, Fudan University Shanghai Cancer Center, Shanghai, China
| | - Xiao-Yan Zhou
- Department of Pathology, Fudan University Shanghai Cancer Center, Shanghai, China
| | - Meng-Hong Sun
- Department of Pathology, Fudan University Shanghai Cancer Center, Shanghai, China
| | - Jiu-Cun Wang
- Ministry of Education Key Laboratory of Contemporary Anthropology and State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai, China
- Fudan-Taizhou Institute of Health Sciences, Taizhou, Jiangsu, China
| | - Ya-Jun Yang
- Ministry of Education Key Laboratory of Contemporary Anthropology and State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai, China
- Fudan-Taizhou Institute of Health Sciences, Taizhou, Jiangsu, China
| | - Li Jin
- Ministry of Education Key Laboratory of Contemporary Anthropology and State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai, China
- Fudan-Taizhou Institute of Health Sciences, Taizhou, Jiangsu, China
| | - Qing-Yi Wei
- Cancer Research Laboratory, Fudan University Shanghai Cancer Center, Shanghai, China
- Department of Epidemiology, The University of Texas, M. D. Anderson Cancer Center, Houston, Texas, United States of America
| | - Yanong Wang
- Department of Gastric Cancer & Soft Tissue Sarcoma Surgery, Fudan University Shanghai Cancer Center, Shanghai, China
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XPD Gene rs13181 Polymorphism and DNA Damage in Human Lymphocytes. Biochem Genet 2012; 50:860-70. [DOI: 10.1007/s10528-012-9526-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2011] [Accepted: 03/08/2012] [Indexed: 11/25/2022]
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Yuan H, Ma H, Lu F, Yuan Z, Wang R, Jiang H, Hu Z, Shen H, Chen N. Genetic variants at 4q23 and 12q24 are associated with head and neck cancer risk in China. Mol Carcinog 2012; 52 Suppl 1:E2-9. [PMID: 22674868 DOI: 10.1002/mc.21929] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2011] [Revised: 05/04/2012] [Accepted: 05/08/2012] [Indexed: 02/03/2023]
Abstract
A recent genome-wide association study (GWAS) reported significant associations of several novel genetic variants with risk of upper aerodigestive tract (UADT) cancers including head and neck cancer (HNC) in Europeans. However, these findings have not been confirmed in other populations including Chinese. According to the findings from the GWAS and other publications, we genotyped six genetic variants (rs1494961, rs1229984, rs1789924, rs971074, rs4767364, and rs671) in a case-control study with 397 HNC cases and 900 controls in China, by using the TaqMan allelic discrimination assay. We found that rs1229984 at 4q23 significantly increased the risk of HNC [dominant model: adjusted odds ratio (OR) = 1.34, 95% confidence interval (CI) = 1.05-1.71; additive model: adjusted OR = 1.24, 95% CI = 1.04-1.50], while rs671 at 12q24 significantly decreased the risk of HNC (recessive model: adjusted OR = 0.46, 95% CI = 0.25-0.85). Furthermore, when these two loci were evaluated together by the number (0-4) of putative risk alleles (rs1229984 G and rs671 G), a significant locus-dosage effect was found between the groups and risk of HNC (Ptrend = 0.016). Compared with the "0-1" group, groups with "2" risk alleles and "3-4" risk alleles significantly increased the risk of HNC with adjusted ORs of 1.17 (95% CI = 0.84-1.64) and 1.51 (95% CI = 1.06-2.15), respectively. However, no significant association was detected between other four variants (rs1494961, rs1789924, rs971074, and rs4767364) and HNC risk. These findings suggest that rs1229984 at 4q23 and rs671 at 12q24 may serve as candidate markers for susceptibility to HNC in Chinese population.
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Affiliation(s)
- Hua Yuan
- Institute of Stomatology, Nanjing Medical University, Nanjing, China; Department of Epidemiology and Biostatistics, MOE Key Laboratory of Modern Toxicology, School of Public Health, Nanjing Medical University, Nanjing, China
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Zhang L, Wang J, Xu L, Zhou J, Guan X, Jiang F, Wu Y, Fan W. Nucleotide excision repair gene ERCC1 polymorphisms contribute to cancer susceptibility: a meta-analysis. Mutagenesis 2012; 27:67-76. [PMID: 22002622 DOI: 10.1093/mutage/ger062] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/30/2023] Open
Abstract
Individual studies of the associations between excision repair cross-complimentary group 1 (ERCC1) polymorphisms and cancer susceptibility have shown inconclusive results. To derive a more precise estimation of the relationship between three well-characterised polymorphisms on ERCC1 and the risk of cancer, we performed a meta-analysis based on 48 publications. We used odds ratios (ORs) with 95% confidence intervals (CIs) to assess the strength of the associations. We found that ERCC1 17677A (rs3212961) variant genotypes were associated with significantly increased overall risk of cancer without substantial heterogeneity (AA versus CC, OR = 1.36, 95% CIs: 1.10-1.68; AC versus CC: OR = 1.11, 95% CIs: 0.99-1.26; dominant comparison: AA/AC versus CC: OR = 1.15, 95% CIs: 1.02-1.29; recessive comparison: AA versus AC/CC: OR = 1.25, 95% CIs: 1.05-1.49). The ERCC1 19007 C (rs11615) allele had null effects on overall risk of cancer; but in the stratified analyses, we observed an elevated association in Asian populations with homozygote variants and hospital-based controls. In addition, during further stratified analyses of cancer groups, homozygote variants were found that are associated with lung cancer and smoking-related cancers. Also, the observed ERCC1 19007 C heterozygote variant contributes to the development of skin cancer. However, the ERCC1 8092C > A (rs3212986) polymorphism did not appear to have an effect on cancer risk. Additionally, no evidence of publication bias was observed in these polymorphisms. Our meta-analysis supports the conclusion that the ERCC1 17677A > C and ERCC1 19007T > C polymorphisms, but not the ERCC1 8092C > A polymorphism, are low-penetrance risk factors for cancer development.
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Affiliation(s)
- Louqian Zhang
- Department of Medical Oncology, Affiliated Cancer Hospital of Jiangsu Province, Nanjing Medical University, 140 Hanzhong Road, Nanjing, 210029, China
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Liu Z, Wei S, Ma H, Zhao M, Myers JN, Weber RS, Sturgis EM, Wei Q. A functional variant at the miR-184 binding site in TNFAIP2 and risk of squamous cell carcinoma of the head and neck. Carcinogenesis 2011; 32:1668-74. [PMID: 21934093 DOI: 10.1093/carcin/bgr209] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Although the role of TNFAIP2 is still unclear, it is an important gene involved in apoptosis, and there are single-nucleotide polymorphisms (SNPs) at its microRNA (miRNA)-binding sites that could modulate miRNA target gene function. In this study, we evaluated associations of four selected SNPs (rs8126 T > C, rs710100 G > A, rs1052912 G > A and rs1052823 G > T) in the miRNA-binding sites of the 3' untranslated region (UTR) with squamous cell carcinoma of the head and neck (SCCHN) risk in 1077 patients with SCCHN and 1073 cancer-free controls in a non-Hispanic White population. We found that, compared with the rs8126 TT genotype, the variant C allele were associated with increased SCCHN risk in an allele dose-response manner (adjusted odds ratio = 1.48 and 95% confidence interval = 1.06-2.05 for CC, respectively; P(trend) = 0.009). No significant associations were seen for the other three SNPs (rs710100 G > A, rs1052912 G > A and rs1052823 G > T). Additionally, we identified that the rs8126 T > C SNP is within the miR-184 seed binding region in the 3' UTR of TNFAIP2. Further functional analyses showed that the rs8126 variant C allele led to significantly lower luciferase activity, compared with the T allele. In the genotype-phenotype correlation analysis of peripheral blood mononuclear cells from 64 SCCHN patients, the rs8126 CC genotype was associated with reduced expression of TNFAIP2 messenger RNA. Taken together, these findings indicate that the miR-184 binding site SNP (rs8126 T > C) in the 3' UTR of TNFAIP2 is functional by modulating TNFAIP2 expression and contributes to SCCHN susceptibility. Larger replication studies are needed to confirm our findings.
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Affiliation(s)
- Zhensheng Liu
- Department of Epidemiology, The University of Texas M. D. Anderson Cancer Center, Houston, TX 77030, USA
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Doherty JA, Weiss NS, Fish S, Fan W, Loomis MM, Sakoda LC, Rossing MA, Zhao LP, Chen C. Polymorphisms in nucleotide excision repair genes and endometrial cancer risk. Cancer Epidemiol Biomarkers Prev 2011; 20:1873-82. [PMID: 21750170 DOI: 10.1158/1055-9965.epi-11-0119] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
BACKGROUND Exposure to estrogens increases the risk of endometrial cancer. Certain estrogen metabolites can form bulky DNA adducts, which are removed via nucleotide excision repair (NER), and the ability to carry out this repair might be related to endometrial cancer risk. METHODS We examined 64 tag and functional single-nucleotide polymorphisms (SNPs) in the NER genes ERCC1, ERCC2 (XPD), ERCC3 (XPB), ERCC4 (XPF), ERCC5 (XPG), LIG1, XPA, and XPC in a population-based case-control study in Washington state, with 783 endometrial cancer cases and 795 controls. RESULTS The presence of ERCC5 rs4150386 C, LIG1 rs3730865 C, XPA rs2808667 T, or XPC rs3731127 T alleles was associated with risk of endometrial cancer, with respective age-, county-, and reference year-adjusted per-allele ORs and 95% CIs of 0.68 (0.53-0.87, P = 0.002), 1.46 (1.02-2.10, P = 0.04), 0.71 (0.52-0.97, P = 0.03), and 1.57 (1.13-2.17, P = 0.007), respectively. CONCLUSIONS Certain ERCC5, LIG1, XPA, and XPC genotypes might influence endometrial cancer risk. IMPACT Because of multiple redundancies in DNA repair pathways (and therefore a low prior probability) and the large number of associations examined, false-positive findings are likely. Further characterization of the relation between variation in NER genes and endometrial cancer risk is warranted.
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Affiliation(s)
- Jennifer A Doherty
- Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA
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Xing J, Dinney CP, Shete S, Huang M, Hildebrandt MA, Chen Z, Gu J. Comprehensive pathway-based interrogation of genetic variations in the nucleotide excision DNA repair pathway and risk of bladder cancer. Cancer 2011; 118:205-15. [PMID: 21692063 DOI: 10.1002/cncr.26224] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2010] [Revised: 01/26/2011] [Accepted: 04/04/2011] [Indexed: 11/08/2022]
Abstract
BACKGROUND Growing evidence suggests that single nucleotide polymorphisms (SNPs) in nucleotide excision repair (NER) pathway genes play an important role in bladder cancer etiology. However, only a limited number of genes and variations in this pathway have been evaluated to date. METHODS In this study, the authors applied a comprehensive pathway-based approach to assess the effects of 207 tagging and potentially functional SNPs in 26 NER genes on bladder cancer risk using a large case-control study that included 803 bladder cancer cases and 803 controls. RESULTS In total, 17 SNPs were associated significantly with altered bladder cancer risk (P < .05), of which, 7 SNPs retained noteworthiness after they were assessed with a Bayesian approach for the probability of false discovery. The most noteworthy SNP was reference SNP 11132186 (rs11132186) in the inhibitor of growth family, member 2 (ING2) gene. Compared with the major allele-containing genotypes, the odds ratio was 0.52 (95% confidence interval, 0.32-0.83; P = .005) for the homozygous variant genotype. Three additional ING2 variants also exhibited significant associations with bladder cancer risk. Significant gene-smoking interactions were observed for 3 of the top 17 SNPs. Furthermore, through an exploratory classification and regression tree (CART) analysis, potential gene-gene interactions were identified. CONCLUSIONS In this a large association study of the NER pathway and the risk of bladder cancer, several novel predisposition variants were identified along with potential gene-gene and gene-environment interactions in modulating bladder cancer risk. The results reinforce the importance of a comprehensive, pathway-focused, and tagging SNP-based candidate gene approach to identify low-penetrance cancer susceptibility loci.
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Affiliation(s)
- Jinliang Xing
- State Key Laboratory of Cancer Biology, Cell Engineering Research Center and Department of Cell Biology, Fourth Military Medical University, Xi'an, People's Republic of China
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Ma H, Wang LE, Liu Z, Sturgis EM, Wei Q. Association between novel PLCE1 variants identified in published esophageal cancer genome-wide association studies and risk of squamous cell carcinoma of the head and neck. BMC Cancer 2011; 11:258. [PMID: 21689432 PMCID: PMC3142535 DOI: 10.1186/1471-2407-11-258] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2010] [Accepted: 06/20/2011] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Phospholipase C epsilon 1 (PLCE1) (an effector of Ras) belonging to the phospholipase family plays crucial roles in carcinogenesis and progression of several cancers, including squamous cell carcinoma of the head and neck (SCCHN). A single nucleotide polymorphism (SNP, rs2274223) in PLCE1 has been identified as a novel susceptibility locus in genome-wide association studies (GWAS) of esophageal squamous cell carcinoma (ESCC) and gastric cardia adenocarcinoma (GCA) that share similar risk factors with SCCHN. Therefore, we investigated the association between potentially functional SNPs in PLCE1 and susceptibility to SCCHN. METHODS We genotyped three potentially functional SNPs (rs2274223A/G, rs3203713A/G and rs11599672T/G) of PLCE1 in 1,098 SCCHN patients and 1,090 controls matched by age and sex in a non-Hispanic white population. RESULTS Although none of three SNPs was alone significantly associated with overall risk of SCCHN, their combined effects of risk alleles (rs2274223G, rs3203713G and rs11599672G) were found to be associated with risk of SCCHN in a locus-dose effect manner (Ptrend=0.046), particularly for non-oropharyngeal tumors (Ptrend=0.017); specifically, rs2274223 was associated with a significantly increased risk (AG vs. AA: adjusted OR=1.29, 95% CI=1.01-1.64; AG/GG vs. AA: adjusted OR=1.30, 95% CI=1.03-1.64), while rs11599672 was associated with a significantly decreased risk (GG vs. TT: adjusted OR=0.54, 95% CI=0.34-0.86; TG/GG vs. TT: adjusted OR=0.76, 95% CI=0.61-0.95). CONCLUSIONS Our findings suggest that PLCE1 variants may have an effect on risk of SCCHN associated with tobacco and alcohol exposure, particularly for those tumors arising at non-oropharyngeal sites. These findings, although need to be validated by larger studies, are consistent with those in esophageal and gastric cancers.
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Affiliation(s)
- Hongxia Ma
- Department of Epidemiology, The University of Texas M.D. Anderson Cancer Center, Houston, Texas 77030, USA
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Mendez P, Taron M, Moran T, Fernandez MA, Requena G, Rosell R. A modified host-cell reactivation assay to quantify DNA repair capacity in cryopreserved peripheral lymphocytes. DNA Repair (Amst) 2011; 10:603-10. [PMID: 21546323 DOI: 10.1016/j.dnarep.2011.04.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2010] [Revised: 03/30/2011] [Accepted: 04/01/2011] [Indexed: 11/15/2022]
Abstract
The host-cell reactivation assay (HCRA) is a functional assay that allows the identification of the genes responsible for DNA repair-deficient syndromes, such as Xeroderma pigmentosum, by cross-complementation experiments. It has also been used in molecular epidemiology studies to correlate the low nucleotide excision repair pathway function in peripheral blood lymphocytes with an increased risk of bladder, head and neck, skin and lung cancers. Herein, we present the technical validation of a newly modified HCRA, where nucleofection is used for the transfection of the pmaxGFP plasmid into cryopreserved peripheral blood lymphocytes (PBLs) or lymphoblastoid cell lines. In each sample, 20-24h after transfection, the relative DNA repair capacity (DRC) was quantified by flow cytometry, comparing the transfection efficiency of nucleoporated cells with undamaged plasmid to those transfected with UV-light damaged plasmid in the seven cell lines that were characterized by different DNA repair phenotypes. Dead cells were excluded from the analysis. We observed a high reproducibility of the relative DRC, transfection efficiency and cell viability. The inter-experimental normalization of the flow cytometry resulted in an increased data accuracy and reproducibility. The amount of cells required for each transfection reaction was reduced fourfold, without affecting the final relative DRC. Furthermore, our HCRA demonstrated strong discrimination power in the UV-light dose-response, both in lymphoblastoid cell lines and cryopreserved PBLs. We also observed a strong correlation of the relative DRC data, when samples were measured against two independent batches of both damaged and undamaged plasmid DNA. The relative DRC variable shows a normal distribution when analyzed in the cryopreserved PBLs from a cohort of 35 lung cancer patients and a 5.59-fold variation in the relative DRC is identified among our patients. The mitotic dynamic was discarded as a confounding factor for the relative DRC measurement in this cohort of patients. The results indicate that our method is highly sensitive, reliable and reproducible, and thus, it suitable for population-based studies to quantify in vitro DNA-repair deficiencies.
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Affiliation(s)
- Pedro Mendez
- Health Science Research Institute Germans Trias i Pujol, Badalona, Barcelona, Spain.
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50
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Wei S, Niu J, Zhao H, Liu Z, Wang LE, Han Y, Chen WV, Amos CI, Rafnar T, Sulem P, Stefansson K, Landi MT, Caporaso NE, Albanes D, Thun MJ, McKay JD, Brennan P, Wang Y, Houlston RS, Spitz MR, Wei Q. Association of a novel functional promoter variant (rs2075533 C>T) in the apoptosis gene TNFSF8 with risk of lung cancer--a finding from Texas lung cancer genome-wide association study. Carcinogenesis 2011; 32:507-15. [PMID: 21292647 DOI: 10.1093/carcin/bgr014] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Published genome-wide association studies (GWASs) have identified few variants in the known biological pathways involved in lung cancer etiology. To mine the possibly hidden causal single nucleotide polymorphisms (SNPs), we explored all SNPs in the extrinsic apoptosis pathway from our published GWAS dataset for 1154 lung cancer cases and 1137 cancer-free controls. In an initial association analysis of 611 tagSNPs in 41 apoptosis-related genes, we identified only 10 tagSNPs associated with lung cancer risk with a P value<10(-2), including four tagSNPs in DAPK1 and three tagSNPs in TNFSF8. Unlike DAPK1 SNPs, TNFSF8 rs2181033 tagged other four predicted functional but untyped SNPs (rs776576, rs776577, rs31813148 and rs2075533) in the promoter region. Therefore, we further tested binding affinity of these four SNPs by performing the electrophoretic mobility shift assay. We found that only rs2075533T allele modified levels of nuclear proteins bound to DNA, leading to significantly decreased expression of luciferase reporter constructs by 5- to -10-fold in H1299, HeLa and HCT116 cell lines compared with the C allele. We also performed a replication study of the untyped rs2075533 in an independent Texas population but did not confirm the protective effect. We further performed a mini meta-analysis for SNPs of TNFSF8 obtained from other four published lung cancer GWASs with 12 214 cases and 47 721 controls, and we found that only rs3181366 (r2=0.69 with the untyped rs2075533) was associated to lung cancer risk (P=0.008). Our findings suggest a possible role of novel TNFSF8 variants in susceptibility to lung cancer.
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Affiliation(s)
- Sheng Wei
- Department of Epidemiology, The University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030, USA
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